mirror of https://github.com/drowe67/codec2.git
put snr_curve.sh system back in from codec2-dev, curves for datac14
drowe67
David Rowe
parent
3b9037c9c7
commit
23a7d60bf8
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@ -30,7 +30,7 @@ Feature Requests can be submitted via GitHub Issues.
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Before writing any code or submitting a PR - **please discuss** the PR with developers by raising a GitHub Issue. We have many years of experience and a carefully considered plan for Codec 2 development, and can guide you on work that will most benefit this project.
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Some key guidelines about the code in the `codec2` repo:
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1. Code that is required to build libcodec2, or to test libcodec2 goes in codec2.
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1. Only code that is required to build, test, or document libcodec2 goes in codec2.
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2. Experimental work, code used for algorithm development, should probably go into some other repo.
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3. Only widely used “production” code goes in codec2. If it has an user base of < 2 (e.g. personal projects, early R&D) - it should probably be application code or a fork.
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@ -146,6 +146,7 @@ These modes use an OFDM modem with powerful LDPC codes and are designed for send
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| DATAC3 | 500 | 321 | 126 | (2048,1024) | 3.19 | 74/100 at 0dB | Forward link data (low SNR) |
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| DATAC4 | 250 | 87 | 56 | (1472,448) | 5.17 | 90/100 at -4dB | Forward link data (low SNR) |
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| DATAC13 | 200 | 64 | 14 | (384,128) | 2.0 | 90/100 at -4dB | Reverse link ACK packets (low SNR) |
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| DATAC14 | 250 | 58 | 3 | (112,56) | 0.69 | 90/100 at -4dB | Reverse link ACK packets (low SNR) |
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Notes:
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1. 16 bits (2 bytes) per frame are reserved for a 16 bit CRC, e.g. for `datac3` we have 128 byte frames, and 128-2=126 bytes/frame of payload data.
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@ -0,0 +1,267 @@
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% snr_curves_plot.m
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%
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% Companion script for unittest/raw_data_curves
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1;
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function state_vec = set_graphics_state_print()
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textfontsize = get(0,"defaulttextfontsize");
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linewidth = get(0,"defaultlinelinewidth");
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markersize = get(0, "defaultlinemarkersize");
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set(0, "defaulttextfontsize", 16);
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set(0, "defaultaxesfontsize", 16);
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set(0, "defaultlinelinewidth", 1);
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state_vec = [textfontsize linewidth markersize];
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endfunction
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function set_graphics_state_screen(state_vec)
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textfontsize = state_vec(1);
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linewidth = state_vec(2);
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markersize = state_vec(3);
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set(0, "defaulttextfontsize", textfontsize);
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set(0, "defaultaxesfontsize", textfontsize);
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set(0, "defaultlinelinewidth", linewidth);
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set(0, "defaultlinemarkersize", markersize);
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endfunction
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function [snr_ch per] = snr_scatter(source, mode, channel, colour)
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suffix = sprintf("_%s_%s_%s",source, mode, channel);
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snr = load(sprintf("snr%s.txt",suffix));
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offset = load(sprintf("offset%s.txt",suffix));
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snr -= offset;
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snr_x = []; snrest_y = [];
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for i=1:length(snr)
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fn = sprintf('snrest%s_%d.txt',suffix,i);
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if exist(fn,'file') == 2
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snrest=load(fn);
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if i == length(snr)
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plot(snr(i)*ones(1,length(snrest)), snrest, sprintf('%s;%s %s;',colour,source,mode));
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else
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plot(snr(i)*ones(1,length(snrest)), snrest, sprintf('%s',colour));
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end
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snr_x = [snr_x snr(i)]; snrest_y = [snrest_y mean(snrest)];
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end
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end
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plot(snr_x, snrest_y, sprintf('%s', colour));
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endfunction
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function [snr_ch per] = per_snr(mode, colour)
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snrch = load(sprintf("snrch_%s.txt",mode));
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snroffset = load(sprintf("snroffset_%s.txt",mode));
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snrch -= snroffset;
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per = load(sprintf("per_%s.txt",mode));
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plot(snrch, per, sprintf('%so-;%s;', colour, mode));
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endfunction
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function snrest_snr_screen(source, channel)
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clf; hold on;
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snr_scatter(source, 'datac0', channel,'b+-')
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snr_scatter(source, 'datac1', channel,'g+-')
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snr_scatter(source, 'datac3', channel,'r+-')
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snr_scatter(source, 'datac4', channel,'c+-')
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snr_scatter(source, 'datac13', channel,'m+-')
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xlabel('SNR (dB)'); ylabel('SNRest (dB)'); grid('minor');
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axis([-12 12 -12 12]);
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a = axis;
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plot([a(1) a(2)],[a(1) a(2)],'bk-');
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hold off; grid;
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if strcmp(source,'ctx')
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title(sprintf('SNR estimate versus SNR (%s) (no compression)', channel));
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else
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title(sprintf('SNR estimate versus SNR (%s) (with compression)', channel));
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end
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legend('location','northwest');
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endfunction
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function snrest_snr_print(source, channel)
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state_vec = set_graphics_state_print();
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snrest_snr_screen(source, channel);
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print(sprintf("snrest_snr_%s.png", source), "-dpng", "-S1000,800");
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set_graphics_state_screen(state_vec);
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endfunction
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function ber_per_v_snr(source, mode, channel, colour)
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suffix = sprintf("_%s_%s_%s.txt",source, mode, channel);
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snr = load(sprintf("snr%s",suffix));
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offset = load(sprintf("offset%s",suffix));
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snr -= offset;
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ber = load(sprintf("ber%s",suffix)) + 1E-6;
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per = load(sprintf("per%s",suffix)) + 1E-6;
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semilogy(snr, ber, sprintf('%s;%s %s ber;', colour, source, mode));
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semilogy(snr, per, sprintf('%s;%s %s per;', colour, source, mode),'linewidth',3,'markersize',10);
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endfunction
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function per_v_snr(source, mode, channel, colour)
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suffix = sprintf("_%s_%s_%s.txt",source, mode, channel);
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snr = load(sprintf("snr%s",suffix));
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offset = load(sprintf("offset%s",suffix));
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snr -= offset;
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per = load(sprintf("per%s",suffix)) + 1E-6;
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if strcmp(channel,"awgn")
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semilogy(snr, per, sprintf('%s;%s %s;', colour, mode, channel));
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else
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semilogy(snr, per, sprintf('%s;%s %s;', colour, mode, channel),'linewidth',3,'markersize',10);
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end
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endfunction
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function thruput_v_snr(source, mode, channel, colour)
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suffix = sprintf("_%s_%s_%s.txt",source, mode, channel);
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snr = load(sprintf("snr%s",suffix));
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offset = load(sprintf("offset%s",suffix));
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snr -= offset;
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per = load(sprintf("per%s",suffix)) + 1E-6;
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if strcmp(mode,"datac0") Rb=291; end;
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if strcmp(mode,"datac1") Rb=980; end;
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if strcmp(mode,"datac3") Rb=321; end;
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if strcmp(mode,"datac4") Rb=87; end;
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if strcmp(mode,"datac13") Rb=65; end;
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if strcmp(mode,"datac14") Rb=58; end;
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if strcmp(channel,"awgn")
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plot(snr, Rb*(1-per), sprintf('%s;%s %s;', colour, mode, channel));
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else
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plot(snr, Rb*(1-per), sprintf('%s;%s %s;', colour, mode, channel),'linewidth',3,'markersize',10);
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end
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endfunction
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function octave_ch_noise_screen(channel)
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clf; hold on;
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ber_per_v_snr('oct','datac0',channel,'bo-')
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ber_per_v_snr('ch' ,'datac0',channel,'bx-')
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ber_per_v_snr('oct','datac1',channel,'go-')
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ber_per_v_snr('ch' ,'datac1',channel,'gx-')
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ber_per_v_snr('oct','datac3',channel,'ro-')
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ber_per_v_snr('ch' ,'datac3',channel,'rx-')
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xlabel('SNR (dB)'); grid;
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hold off;
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if strcmp(channel,"awgn")
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axis([-6 8 1E-3 1]);
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else
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axis([-2 12 1E-3 1]);
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end
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title(sprintf('Comparsion of Measuring SNR from Octave and ch tool (%s)', channel));
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endfunction
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function octave_ch_noise_print(channel)
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state_vec = set_graphics_state_print();
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octave_ch_noise_screen(channel);
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print(sprintf("octave_ch_noise_%s.png", channel), "-dpng","-S1000,800");
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set_graphics_state_screen(state_vec);
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endfunction
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function octave_c_tx_screen(channel)
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clf; hold on;
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ber_per_v_snr('oct','datac0',channel,'bo-')
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ber_per_v_snr('ctx','datac0',channel,'bx-')
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ber_per_v_snr('oct','datac1',channel,'go-')
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ber_per_v_snr('ctx','datac1',channel,'gx-')
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ber_per_v_snr('oct','datac3',channel,'ro-')
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ber_per_v_snr('ctx','datac3',channel,'rx-')
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xlabel('SNR (dB)'); grid;
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hold off;
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if strcmp(channel,"awgn")
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axis([-6 8 1E-3 1]);
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else
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axis([-2 12 1E-3 1]);
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end
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title(sprintf('Comparsion of Octave Tx and C Tx (no compression) (%s)', channel));
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endfunction
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function octave_c_tx_print(channel)
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state_vec = set_graphics_state_print();
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octave_c_tx_screen(channel);
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print(sprintf("octave_c_tx_%s.png", channel), "-dpng","-S1000,800");
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set_graphics_state_screen(state_vec);
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endfunction
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function octave_c_tx_comp_screen(channel)
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clf; hold on;
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ber_per_v_snr('oct','datac0',channel,'bo-')
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ber_per_v_snr('ctxc','datac0',channel,'bx-')
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ber_per_v_snr('oct','datac1',channel,'go-')
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ber_per_v_snr('ctxc','datac1',channel,'gx-')
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ber_per_v_snr('oct','datac3',channel,'ro-')
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ber_per_v_snr('ctxc','datac3',channel,'rx-')
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xlabel('SNR (dB)'); grid;
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hold off;
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if strcmp(channel,"awgn")
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axis([-6 8 1E-3 1]);
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else
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axis([-2 12 1E-3 1]);
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end
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title(sprintf('Comparsion of Octave Tx and C Tx (with compression) (%s)', channel));
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endfunction
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function octave_c_tx_comp_print(channel)
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state_vec = set_graphics_state_print();
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octave_c_tx_comp_screen(channel);
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print(sprintf("octave_c_tx_comp_%s.png", channel), "-dpng","-S1000,800");
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set_graphics_state_screen(state_vec);
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endfunction
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% composite AWGN and MPP for compressed
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function c_tx_comp_screen
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clf; hold on;
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per_v_snr('ctxc','datac0','awgn','bo-')
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per_v_snr('ctxc','datac1','awgn','go-')
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per_v_snr('ctxc','datac3','awgn','ro-')
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per_v_snr('ctxc','datac4','awgn','co-')
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per_v_snr('ctxc','datac13','awgn','mo-')
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per_v_snr('ctxc','datac14','awgn','ko-')
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per_v_snr('ctxc','datac0','mpp','bx-')
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per_v_snr('ctxc','datac1','mpp','gx-')
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per_v_snr('ctxc','datac3','mpp','rx-')
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per_v_snr('ctxc','datac4','mpp','cx-')
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per_v_snr('ctxc','datac13','mpp','mx-')
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per_v_snr('ctxc','datac14','mpp','kx-')
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xlabel('SNR (dB)'); ylabel('PER'); grid;
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hold off;
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axis([-10 14 1E-3 1]);
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title('PER of C Raw Data Modes (with compression)');
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endfunction
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function c_tx_comp_print;
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state_vec = set_graphics_state_print();
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c_tx_comp_screen;
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print("c_tx_comp.png", "-dpng","-S1000,800");
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set_graphics_state_screen(state_vec);
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endfunction
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function c_tx_comp_thruput_screen
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clf; hold on;
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thruput_v_snr('ctxc','datac0','awgn','bo-')
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thruput_v_snr('ctxc','datac1','awgn','go-')
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thruput_v_snr('ctxc','datac3','awgn','ro-')
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thruput_v_snr('ctxc','datac4','awgn','co-')
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thruput_v_snr('ctxc','datac13','awgn','mo-')
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thruput_v_snr('ctxc','datac14','awgn','ko-')
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thruput_v_snr('ctxc','datac0','mpp','bx-')
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thruput_v_snr('ctxc','datac1','mpp','gx-')
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thruput_v_snr('ctxc','datac3','mpp','rx-')
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thruput_v_snr('ctxc','datac4','mpp','cx-')
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thruput_v_snr('ctxc','datac13','mpp','mx-')
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thruput_v_snr('ctxc','datac14','mpp','kx-')
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xlabel('SNR (dB)'); ylabel('bits/s'); grid;
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hold off;
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axis([-10 10 0 1000]);
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title(' Throughput for C Tx (with compression)');
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legend('location','west');
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endfunction
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function c_tx_comp_thruput_print;
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state_vec = set_graphics_state_print;
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c_tx_comp_thruput_screen;
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print("c_tx_comp_thruput.png", "-dpng","-S1000,800");
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set_graphics_state_screen(state_vec);
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endfunction
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#{
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figure(1); octave_ch_noise_screen;
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figure(2); octave_c_tx_screen;
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figure(3); octave_c_tx_comp_screen
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figure(4); snrest_snr_screen;
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figure(5); octave_ch_noise_print;
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figure(6); octave_c_tx_print;
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figure(7); octave_c_tx_comp_print;
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figure(8); snrest_snr_print;
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#}
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2
src/ch.c
2
src/ch.c
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@ -256,7 +256,7 @@ int main(int argc, char *argv[]) {
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stderr,
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"\nAdjust path --fading_dir or use GNU Octave to generate:\n\n");
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gen_fading_file:
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fprintf(stderr, "$ octave --no-gui\n");
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fprintf(stderr, "$ octave-cli\n");
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fprintf(stderr, "octave:24> pkg load signal\n");
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fprintf(stderr, "octave:24> time_secs=60\n");
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fprintf(stderr,
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@ -51,6 +51,7 @@ if [ "$1" == "LPCNet" ]; then
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data_test "datac3"
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data_test "datac4"
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data_test "datac13"
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data_test "datac14"
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fi
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exit 0
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@ -0,0 +1,149 @@
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# Makefile
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# Dec 2022
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#
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# Automates PER/BER curve generation for raw data mode:
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#
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# 1. Compare "ch" noise injection/SNR measurement against reference Octave Tx
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# 2. Compare C Tx against Octave Tx (with and without compression)
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# 3. Plot curves for SNR estimated from C Rx against actual SNR
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# 4. Plot AWGN/PER C Tx curves for end user documentation
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#
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# usage:
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#
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# 1. Create 20 minutes of MPP fading samples:
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# $ cd codec2/octave/
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# $ octave-cli
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# octave:24> pkg load signal
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# octave:24> time_secs=60*20
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# octave:26> ch_fading("~/codec2/build_linux/unittest/fast_fading_samples.float", 8000, 1.0, 8000*time_secs)
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#
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# 2. Run scripts:
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#
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# $ make
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SHELL := /bin/bash
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CODEC2 := $(HOME)/codec2
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all: test \
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octave_ch_noise_awgn.png octave_c_tx_awgn.png octave_c_tx_comp_awgn.png \
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octave_ch_noise_mpp.png octave_c_tx_mpp.png octave_c_tx_comp_mpp.png \
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snrest_snr_ctx.png snrest_snr_ctxc.png \
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c_tx_comp.png c_tx_comp_thruput.png
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clean:
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rm -f *.txt *.png *.raw
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# run this first, traps common CML setup error
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test:
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source snr_curves.sh; test_ldpc
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# subset of files generated, but enough to set up Makefile dependencies
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snr_oct = snr_oct_datac0_awgn.txt snr_oct_datac1_awgn.txt snr_oct_datac3_awgn.txt
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snr_ch = snr_ch_datac0_awgn.txt snr_ch_datac1_awgn.txt snr_ch_datac3_awgn.txt
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snr_ctx = snr_ctx_datac0_awgn.txt snr_ctx_datac1_awgn.txt snr_ctx_datac3_awgn.txt
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snr_ctxc = snr_ctxc_datac0_awgn.txt snr_ctxc_datac3_awgn.txt
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snr_oct_mpp = snr_oct_datac0_mpp.txt snr_oct_datac1_mpp.txt snr_oct_datac3_mpp.txt
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snr_ch_mpp = snr_ch_datac0_mpp.txt snr_ch_datac1_mpp.txt snr_ch_datac3_mpp.txt
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snr_ctx_mpp = snr_ctx_datac0_mpp.txt snr_ctx_datac1_mpp.txt snr_ctx_datac3_mpp.txt
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snr_ctxc_mpp = snr_ctxc_datac0_mpp.txt snr_ctxc_datac3_mpp.txt
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$(snr_oct):
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source snr_curves.sh; generate_octave_tx_data datac0 awgn
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source snr_curves.sh; generate_octave_tx_data datac1 awgn
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source snr_curves.sh; generate_octave_tx_data datac3 awgn
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$(snr_oct_mpp):
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source snr_curves.sh; generate_octave_tx_data datac0 mpp
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source snr_curves.sh; generate_octave_tx_data datac1 mpp
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||||
source snr_curves.sh; generate_octave_tx_data datac3 mpp
|
||||
|
||||
$(snr_ch):
|
||||
source snr_curves.sh; generate_ch_data datac0 awgn
|
||||
source snr_curves.sh; generate_ch_data datac1 awgn
|
||||
source snr_curves.sh; generate_ch_data datac3 awgn
|
||||
|
||||
$(snr_ch_mpp):
|
||||
source snr_curves.sh; generate_ch_data datac0 mpp
|
||||
source snr_curves.sh; generate_ch_data datac1 mpp
|
||||
source snr_curves.sh; generate_ch_data datac3 mpp
|
||||
|
||||
# C without compression
|
||||
|
||||
$(snr_ctx):
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac0 awgn
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac1 awgn
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac3 awgn
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac4 awgn
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac13 awgn
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac14 awgn
|
||||
|
||||
$(snr_ctx_mpp):
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac0 mpp
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac1 mpp
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac3 mpp
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac4 mpp
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac13 mpp
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac14 mpp
|
||||
|
||||
# C with compression
|
||||
|
||||
$(snr_ctxc):
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac0 awgn 1
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac1 awgn 1
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac3 awgn 1
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac4 awgn 1
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac13 awgn 1
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac14 awgn 1
|
||||
|
||||
$(snr_ctxc_mpp):
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac0 mpp 1
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac1 mpp 1
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac3 mpp 1
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac4 mpp 1
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac13 mpp 1
|
||||
source snr_curves.sh; generate_snrest_v_snr_data datac14 mpp 1
|
||||
|
||||
# Octave and C curves should be on top of each other, indicating Octave
|
||||
# and ch noise injection/SNR measurement are equivalent
|
||||
octave_ch_noise_awgn.png: $(snr_oct) $(snr_ch)
|
||||
echo "snr_curves_plot; octave_ch_noise_print('awgn'); quit" | \
|
||||
octave-cli -p $(CODEC2)/octave
|
||||
octave_ch_noise_mpp.png: $(snr_oct_mpp) $(snr_ch_mpp)
|
||||
echo "snr_curves_plot; octave_ch_noise_print('mpp'); quit" | \
|
||||
octave-cli -p $(CODEC2)/octave
|
||||
|
||||
# Octave Tx and C Tx curves should be on top of each other
|
||||
octave_c_tx_awgn.png: $(snr_oct) $(snr_ctx)
|
||||
echo "snr_curves_plot; octave_c_tx_print('awgn'); quit" | \
|
||||
octave-cli -p $(CODEC2)/octave
|
||||
octave_c_tx_mpp.png: $(snr_oct_mpp) $(snr_ctx_mpp)
|
||||
echo "snr_curves_plot; octave_c_tx_print('mpp'); quit" | \
|
||||
octave-cli -p $(CODEC2)/octave
|
||||
|
||||
# Octave Tx and C Tx (compressed) curves should be close, but C may be 1dB
|
||||
# poorer
|
||||
octave_c_tx_comp_awgn.png: $(snr_oc) $(snr_ctxc)
|
||||
echo "snr_curves_plot; octave_c_tx_comp_print('awgn'); quit" | \
|
||||
octave-cli -p $(CODEC2)/octave
|
||||
octave_c_tx_comp_mpp.png: $(snr_oct_mpp) $(snr_ctxc_mpp)
|
||||
echo "snr_curves_plot; octave_c_tx_comp_print('mpp'); quit" | \
|
||||
octave-cli -p $(CODEC2)/octave
|
||||
|
||||
# combined AWGN and MPP from C Tx (compressed) - what end users would run
|
||||
c_tx_comp.png: $(snr_ctxc) $(snr_ctxc_mpp)
|
||||
echo "snr_curves_plot; c_tx_comp_print; quit" | \
|
||||
octave-cli -p $(CODEC2)/octave
|
||||
|
||||
# Curves of SNR estimates from C Rx compared to actual SNR, useful for "gear shifting"
|
||||
snrest_snr_ctx.png: $(snr_ctx)
|
||||
echo "snr_curves_plot; snrest_snr_print('ctx', 'awgn'); quit" | \
|
||||
octave-cli -p $(CODEC2)/octave
|
||||
snrest_snr_ctxc.png: $(snr_ctxc)
|
||||
echo "snr_curves_plot; snrest_snr_print('ctxc', 'awgn'); quit" | \
|
||||
octave-cli -p $(CODEC2)/octave
|
||||
|
||||
# Throughput of payload data in bits/s of modes against SNR
|
||||
c_tx_comp_thruput.png: $(snr_ctxc) $(snr_ctxc_mpp)
|
||||
echo "snr_curves_plot; c_tx_comp_thruput_print; quit" | \
|
||||
octave-cli -p $(CODEC2)/octave
|
||||
|
|
@ -0,0 +1,191 @@
|
|||
# snr_curves.sh
|
||||
#
|
||||
# Library of bash functions to generate data for SNR curves.
|
||||
#
|
||||
# testing a function example:
|
||||
# $ bash -c "source ./snr_curves.sh; generate_octave_tx_data datac0 awgn"
|
||||
|
||||
set -x
|
||||
|
||||
PATH=${PATH}:${HOME}/codec2/build_linux/src
|
||||
CODEC2=${HOME}/codec2
|
||||
FADING_DIR=${CODEC2}/build_linux/unittest
|
||||
|
||||
snr_list='-5 -4 -3 -2 0 1 2 4'
|
||||
No_list='-13 -14 -15 -16 -18 -20 -22 -24 -26'
|
||||
Nbursts_awgn=20
|
||||
Nbursts_mpp=100
|
||||
|
||||
# Octave Tx injects noise and is source of truth for SNR, measure BER/PER v SNR
|
||||
function generate_octave_tx_data {
|
||||
mode=$1
|
||||
channel=$2
|
||||
|
||||
Nbursts=$Nbursts_awgn
|
||||
snr_nudge=0
|
||||
if [ "$channel" == "mpp" ]; then
|
||||
Nbursts=$Nbursts_mpp
|
||||
snr_nudge=4
|
||||
fi
|
||||
|
||||
rx_log=$(mktemp)
|
||||
|
||||
i=1
|
||||
rm -f snr_oct_${mode}_${channel}*.txt
|
||||
rm -f ber_oct_${mode}_${channel}*.txt
|
||||
rm -f per_oct_${mode}_${channel}*.txt
|
||||
for snr in $snr_list
|
||||
do
|
||||
snr_adj=$((${snr}+${snr_nudge}))
|
||||
echo "warning ('off', 'Octave:data-file-in-path');
|
||||
ofdm_ldpc_tx('test_${mode}.raw','${mode}',1,${snr_adj},'${channel}','bursts',${Nbursts},'crc');
|
||||
quit" | DISPLAY="" octave-cli -p ${CODEC2}/octave
|
||||
freedv_data_raw_rx --testframes $mode test_${mode}.raw /dev/null 2>${rx_log} -v
|
||||
BERmeas=$(cat ${rx_log} | grep 'BER......:' | cut -d' ' -f2)
|
||||
PERmeas=$(cat ${rx_log} | grep 'Coded FER' | cut -d' ' -f3)
|
||||
|
||||
echo ${snr_adj} >> snr_oct_${mode}_${channel}.txt
|
||||
echo ${BERmeas} >> ber_oct_${mode}_${channel}.txt
|
||||
echo ${PERmeas} >> per_oct_${mode}_${channel}.txt
|
||||
i=$((i+1))
|
||||
done
|
||||
echo 0 > offset_oct_${mode}_${channel}.txt
|
||||
}
|
||||
|
||||
# ch injects noise and is source of truth for SNR, measure BER/PER v SNR
|
||||
# Octave Tx
|
||||
function generate_ch_data {
|
||||
mode=$1
|
||||
channel=$2
|
||||
|
||||
ch_multipath=''
|
||||
Nbursts=$Nbursts_awgn
|
||||
snr_nudge=0
|
||||
if [ "$channel" == "mpp" ]; then
|
||||
ch_multipath='--mpp'
|
||||
Nbursts=$Nbursts_mpp
|
||||
snr_nudge=4
|
||||
fi
|
||||
|
||||
octave_log=$(mktemp)
|
||||
ch_log=$(mktemp)
|
||||
rx_log=$(mktemp)
|
||||
|
||||
i=1
|
||||
rm -f snr_ch_${mode}_${channel}*.txt
|
||||
rm -f ber_ch_${mode}_${channel}*.txt
|
||||
rm -f per_ch_${mode}_${channel}*.txt
|
||||
for No in $No_list
|
||||
do
|
||||
No_adj=$((${No}-${snr_nudge}))
|
||||
echo "warning ('off', 'Octave:data-file-in-path');
|
||||
ofdm_ldpc_tx('test_${mode}.raw','${mode}',1,100,'awgn','bursts',${Nbursts},'crc');
|
||||
quit" | DISPLAY="" octave-cli -p ${CODEC2}/octave 1>${octave_log}
|
||||
SNRoffset=$(cat ${octave_log} | grep 'Burst offset:' | cut -d' ' -f5)
|
||||
|
||||
ch test_${mode}.raw - --No $No_adj ${ch_multipath} --fading_dir ${FADING_DIR} 2>>${ch_log} | \
|
||||
freedv_data_raw_rx --testframes $mode - /dev/null -v 2>${rx_log}
|
||||
BERmeas=$(cat ${rx_log} | grep 'BER......:' | cut -d' ' -f2)
|
||||
PERmeas=$(cat ${rx_log} | grep 'Coded FER' | cut -d' ' -f3)
|
||||
|
||||
echo ${BERmeas} >> ber_ch_${mode}_${channel}.txt
|
||||
echo ${PERmeas} >> per_ch_${mode}_${channel}.txt
|
||||
i=$((i+1))
|
||||
|
||||
# trap not enough fading file samples (with mpp)
|
||||
grep "Fading file finished" ${ch_log}
|
||||
if [ $? -eq 0 ]; then
|
||||
cat ${ch_log}
|
||||
exit 1
|
||||
fi
|
||||
done
|
||||
|
||||
echo ${SNRoffset} > offset_ch_${mode}_${channel}.txt
|
||||
SNRch=$(cat ${ch_log} | grep SNR3k | tr -s ' ' | cut -d' ' -f3)
|
||||
echo ${SNRch} > snr_ch_${mode}_${channel}.txt
|
||||
}
|
||||
|
||||
# ch injects noise and is source of truth for SNR, measure BER/PER v SNR and
|
||||
# SNR estimates v SNR from rx, C Tx
|
||||
function generate_snrest_v_snr_data {
|
||||
mode=$1
|
||||
channel=$2
|
||||
|
||||
snr_nudge=0
|
||||
aNo_list=$No_list
|
||||
|
||||
# nudge SNR test range to get meaningful results for these tests
|
||||
if [ "$mode" == "datac1" ]; then
|
||||
snr_nudge=4
|
||||
fi
|
||||
if [[ "$mode" == "datac4" || "$mode" == "datac13" || "$mode" == "datac14" ]]; then
|
||||
snr_nudge=-6
|
||||
fi
|
||||
|
||||
ch_multipath=''
|
||||
Nbursts=$Nbursts_awgn
|
||||
if [ "$channel" == "mpp" ]; then
|
||||
ch_multipath='--mpp'
|
||||
Nbursts=$Nbursts_mpp
|
||||
snr_nudge=$((${snr_nudge}+4))
|
||||
fi
|
||||
|
||||
clip=0
|
||||
id='ctx'
|
||||
if [ "$#" -eq 3 ]; then
|
||||
clip=$3
|
||||
id='ctxc'
|
||||
snr_nudge=$((${snr_nudge}-4))
|
||||
fi
|
||||
|
||||
tx_log=$(mktemp)
|
||||
ch_log=$(mktemp)
|
||||
rx_log=$(mktemp)
|
||||
|
||||
i=1
|
||||
rm -f snrest_${id}_${mode}_${channel}*.txt
|
||||
rm -f ber_${id}_${mode}_${channel}*.txt
|
||||
rm -f per_${id}_${mode}_${channel}*.txt
|
||||
for No in $aNo_list
|
||||
do
|
||||
No_adj=$((${No}-${snr_nudge}))
|
||||
freedv_data_raw_tx --clip ${clip} --delay 1000 --txbpf ${clip} --bursts $Nbursts --testframes $Nbursts $mode /dev/zero - 2>${tx_log} | \
|
||||
ch - - --No $No_adj ${ch_multipath} --fading_dir ${FADING_DIR} 2>>${ch_log} | \
|
||||
freedv_data_raw_rx --testframes $mode - /dev/null 2>${rx_log} -v
|
||||
SNRoffset=$(cat ${tx_log} | grep "mark:space" | tr -s ' ' | cut -d' ' -f 5)
|
||||
|
||||
SNRest=$(cat ${rx_log} | grep '\-BS\-' | tr -s ' ' | cut -d' ' -f17)
|
||||
if [ ! -z "$SNRest" ]; then
|
||||
echo ${SNRest} > snrest_${id}_${mode}_${channel}_${i}.txt
|
||||
fi
|
||||
BERmeas=$(cat ${rx_log} | grep 'BER......:' | cut -d' ' -f2)
|
||||
PERmeas=$(cat ${rx_log} | grep 'Coded FER' | cut -d' ' -f3)
|
||||
echo ${BERmeas} >> ber_${id}_${mode}_${channel}.txt
|
||||
echo ${PERmeas} >> per_${id}_${mode}_${channel}.txt
|
||||
i=$((i+1))
|
||||
done
|
||||
|
||||
echo ${SNRoffset} > offset_${id}_${mode}_${channel}.txt
|
||||
|
||||
# trap not enough fading file samples (with mpp)
|
||||
grep "Fading file finished" ${ch_log}
|
||||
if [ $? -eq 0 ]; then
|
||||
cat ${ch_log}
|
||||
exit 1
|
||||
fi
|
||||
SNRch=$(cat ${ch_log} | grep SNR3k | tr -s ' ' | cut -d' ' -f3)
|
||||
echo ${SNRch} > snr_${id}_${mode}_${channel}.txt
|
||||
}
|
||||
|
||||
# Sanity check to make sure Octave/CML is set up OK
|
||||
function test_ldpc {
|
||||
echo "ldpcut; quit" | DISPLAY="" octave-cli -p ${CODEC2}/octave
|
||||
if [ "$?" -ne 0 ]; then
|
||||
echo "basic octave test failed, you may need to"
|
||||
echo "(a) run ctests to create build_xxx/cml"
|
||||
echo "(b) set up ~/.octaverc as per octave/ldpc.m"
|
||||
exit 1
|
||||
else
|
||||
echo "OK"
|
||||
fi
|
||||
}
|
||||
Loading…
Reference in New Issue