本帖最后由 814685372 于 2020-6-8 14:06 编辑

请问这个代码我出错辽  有没有大佬看看怎么改

clear all;

clc;

%%参数设置

snr_mini = 5;               %信噪比最小值

snr_max = 20;               %信噪比最大值

TxSampleRate = 32e9;        %信号的码元速率

TxLinewidth = 0;            %发射信号的载波线宽

TxCarrierRate = 0;          %发射信号的载波频率

DataSymbolNumber = 10000;   %数据点的个数

ClassifySetNumber = 100;    %独立仿真的次数

printJ = 5;                 %需要输出观察的调制方式，0为不输出

printXingZuo = 1;           %是否需要打印星座图，0为不打印

% signal generation;如果想要进行100组独立的测试，可以建立100次循环，产生100组独立的数据

for j = 1:6  % bit per symbol: 1. PSK; 2. QPSK; 3.8QAM; 4. 16QAM; 5. 32QAM; 6.64QAM...

System.BitPerSymbol = j;

snr = snr_mini:snr_max;  %SNR信噪比的设置，单位dB

classify_correct_ratio = zeros(length(snr), 1);

for snrIndex= 1:length(snr)

if(j==printJ) fprintf('\n--------------- snr = %d ------------\n',snr(snrIndex)); end

classify_correct = 0;

for i = 1:ClassifySetNumber

Tx.SampleRate = TxSampleRate; %symbol Rate，信号的码元速率，可以自行定义

Tx.Linewidth = TxLinewidth;%发射信号的载波的线宽，一般与信号的相位噪声有关

Tx.Carrier = DataSymbolNumber;%发射信号的载波频率

M = 2^System.BitPerSymbol;

%%信号生成

Tx.DataSymbol = randi([0 M-1],1,DataSymbolNumber);%每一次随机产生的数据量

%数据的不同调制方式产生：这里把2^3(8QAM)的形式单独拿出来设置，是为了实现最优的星型8QAM星座图

if M ~= 8;

h = modem.qammod('M', M, 'SymbolOrder', 'Gray');

Tx.DataConstel = modulate(h,Tx.DataSymbol);

else

tmp = Tx.DataSymbol;

tmp2  = zeros(1,length(Tx.DataSymbol));

for kk = 1:length(Tx.DataSymbol)

switch tmp(kk)

case 0

tmp2(kk) = 1 + 1i;

case 1

tmp2(kk) = -1 + 1i;

case 2

tmp2(kk) = -1 - 1i;

case 3

tmp2(kk) = 1 - 1i;

case 4

tmp2(kk) = 1+sqrt(3);

case 5

tmp2(kk) = 0 + 1i .* (1+sqrt(3));

case 6

tmp2(kk) = 0 - 1i .* (1+sqrt(3));

case 7

tmp2(kk) = -1-sqrt(3);

end

end

Tx.DataConstel = tmp2;

clear tmp tmp2;

end

Tx.Signal = Tx.DataConstel;

%数据的载波加载，考虑到相位噪声等

N = length(Tx.Signal);

dt = 1/Tx.SampleRate;

t = dt*(0:N-1);

Phase1 = [0, cumsum(normrnd(0,sqrt(2*pi*Tx.Linewidth/(Tx.SampleRate)), 1, N-1))];

carrier1 = exp(1i*(2*pi*t*Tx.Carrier + Phase1));

Tx.Signal = Tx.Signal.*carrier1;

Rx.Signal = awgn(Tx.Signal,snr(snrIndex),'measured');%数据在AWGN信道下的接收

%%信号识别

CMAOUT = Rx.Signal;

%去除直流成分

CMAOUT = CMAOUT - mean(CMAOUT);

%normalization接收信号功率归一化

CMAOUT=CMAOUT/sqrt(mean(abs(CMAOUT).^2));

s = CMAOUT;

signalpow = mean(abs(s).^2);%信号功率

noisepow = signalpow/(10^(snr(snrIndex)/10));%噪声功率

C20_hat = mean(s.^2);

C21_hat = mean(abs(s).^2);

C21_hat = C21_hat-noisepow;%计算信号二阶累积量C21时，由于C21为信号模的平方

%而我们接收的s是在AWGN信道下接收的，所以求C21时还应考虑噪声功率。

C40_hat = mean(s.^4)-3*C20_hat^2;

%C41_hat = mean((s.^3).*conj(s))-3*C20_hat*C21_hat;

C42_hat = mean(abs(s).^4)-abs(C20_hat)^2-2*C21_hat^2;

C40_normal = C40_hat/C21_hat.^2;

%C42_normal = C42_hat/C21_hat.^2;

AbsC40 = abs(C40_normal);

if(j==printJ)    fprintf('%g   ',AbsC40);   end

if(AbsC40>=1.5)%PSK

classify = 1;

elseif(AbsC40>=0.9&&AbsC40<1.1)%QPSK

classify = 2;

elseif(AbsC40>=1.1&&AbsC40<1.3)%8QAM

classify = 3;

elseif(AbsC40>=0.67&&AbsC40<0.9)%16QAM

classify = 4;

elseif(AbsC40<0.35)%32QAM

classify = 5;

elseif(AbsC40>=0.35&&AbsC40<0.63)%64QAM

classify = 6;

end

if(classify == System.BitPerSymbol)

classify_correct = classify_correct + 1;

end

%subplot(1,7,snrIndex);%绘制原始噪声

%plot(Rx.Signal,'.');

%plot(CMAOUT,'.');

end

classify_correct_ratio(snrIndex) = classify_correct/ClassifySetNumber*100;

end

%%绘制图形

figure(1);subplot(2, 3, j);

plot(snr, classify_correct_ratio, '-b.');

axis([snr_mini snr_max 0 110]);

ylabel('识别正确率/%');

xlabel('信噪比/dB');

if(j == 1)

title('PSK调制方式识别');

elseif(j == 2)

title('QPSK调制方式识别');

elseif(j == 3)

title('8QAM调制方式识别');

elseif(j == 4)

title('16QAM调制方式识别');

elseif(j == 5)

title('32QAM调制方式识别');

else

title('64QAM调制方式识别');

end

if(printXingZuo==1)

figure(2);subplot(2, 3, j);

plot(real(CMAOUT),imag(CMAOUT),'.');

if(j == 1)

title('PSK调制方式星座图');

elseif(j == 2)

title('QPSK调制方式星座图');

elseif(j == 3)

title('8QAM调制方式星座图');

elseif(j == 4)

title('16QAM调制方式星座图');

elseif(j == 5)

title('32QAM调制方式星座图');

else

title('64QAM调制方式星座图');

end

end

end

错误使用 modem.qammod (line 82)

MODEM.QAMMOD has been removed. Use QAMMOD instead.

出错 Untitled (line 36)

h = modem.qammod('M', M, 'SymbolOrder', 'Gray');