% ofdm spectrum plot
clear all;
close all;
clc;
Num_Sc = 12; % 13 subcarriers
Ts = 1; % 1s
F_space = 1/Ts;
F = -F_space*Num_Sc/2-4:0.001:F_space*Num_Sc/2+4;
F_spectrum = zeros(Num_Sc,length(F));
for i = -Num_Sc/2:1:Num_Sc/2
F_spectrum(i+Num_Sc/2+1,1:end) = sin(2*pi*(F-i*F_space).*Ts/2)./(2*pi*(F-i*F_space).*Ts/2);
end
plot(F,F_spectrum)
grid on
% ofdm subcarrier plot
clear all;
close all;
clc;
N = 256;
M = 6;
N_symbol = 1;
% s_data = [-3-sqrt(-1)*3 -3-sqrt(-1) -3-sqrt(1) -3-sqrt(-1)*3]/sqrt(10);
s_data = (1+sqrt(-1))/sqrt(2);
tx_data = repmat(s_data,1,N); % some initial phase
% Original_bin = randint(2,N*N_symbol,2,222);
% Modobj = modem.qammod('M',4,'SymbolOrder','Gray','InputType','Bit');
% tx_data = modulate(Modobj,Original_bin)/sqrt(10);
for j = 0:1:N_symbol-1
for k =0:1:N-1
for n = 0:1:N-1
x_tmp(k+1,n+1+j*N) = tx_data(k+1+j*N)*exp(sqrt(-1)*2*pi*k*n/N);
end
end
end
% plot four-subcarrier
figure(1)
plot(real(x_tmp(1:4,1:end).'))
百度搜索: 在手中源码 里面有很多ofdm的实用资料，价格也不贵。
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024