Commit | Line | Data |
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1eeb62fb | 1 | function discretePSK_BER_SNR(M, numSymbs) |
4dd65313 AIL |
2 | %% Set defaults for inputs |
3 | if nargin < 2 | |
1eeb62fb | 4 | numSymbs = 1000; |
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5 | end |
6 | if nargin < 1 | |
7 | M = 2; | |
8 | end | |
9 | ||
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10 | EbN0_db = 0:0.2:10; |
11 | EbN0 = 10 .^ (EbN0_db ./ 10); | |
12 | ||
13 | Es = 1; | |
14 | Eb = Es / log2(M); | |
15 | N0 = Eb ./ EbN0; | |
16 | ||
17 | EsN0 = EbN0 .* log2(M); | |
18 | EsN0_db = 10 .* log10(EsN0); | |
19 | ||
20 | plotlen = length(EbN0); | |
21 | ||
22 | ber = zeros(1, plotlen); | |
23 | ||
1eeb62fb | 24 | data = randi([0, M - 1], 1, numSymbs); |
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25 | txsig = pskmod(data, M, 0, 'gray'); |
26 | ||
27 | for i = 1:plotlen | |
28 | rxsig = awgn(txsig, EsN0_db(i)); | |
29 | demodData = pskdemod(rxsig, M, 0, 'gray'); | |
30 | ||
31 | [bitErrors, ber(i)] = biterr(data, demodData); | |
32 | end | |
33 | ||
1eeb62fb | 34 | figure(1); |
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35 | clf; |
36 | ||
37 | %% Plot simulated results | |
38 | semilogy(EbN0_db, ber, 'r', 'LineWidth', 2); | |
39 | hold on; | |
40 | ||
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41 | theoreticalPSK(EbN0_db, M, 'b', 'LineWidth', 1); |
42 | ||
4dd65313 | 43 | if M == 2 || M == 4 |
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44 | legend('Simulated', 'Theoretical'); |
45 | else | |
1eeb62fb | 46 | legend('Simulated', 'Approximation'); |
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47 | end |
48 | ||
49 | title(strcat(num2str(M), '-PSK with Gray code')); | |
50 | grid on; | |
51 | xlabel('$E_b/N_0$ (dB)'); | |
52 | ylabel('BER'); | |
53 | ||
54 | formatFigure; | |
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55 | %saveas(gcf, strcat('BER_SNR_', num2str(M), 'PSK_', num2str(numSymbs), ... |
56 | % '.svg')); | |
4dd65313 | 57 | end |