matlab bluetooth通信系统仿真代码
时间: 2023-08-06 20:05:28 浏览: 72
以下是一个简单的基于MATLAB的蓝牙通信系统仿真代码,可以帮助你了解蓝牙通信系统的实现。
```matlab
clc;
clear all;
close all;
% 设置参数
Fs = 8000;
Fc = 2400;
Tb = 0.001;
N = 8;
L = 4;
% 生成随机比特序列
data = randi([0 1], [1 N*L]);
% 串并转换
data_matrix = reshape(data, [N, L]);
% 符号映射
symbols_matrix = 2*data_matrix - 1;
% I-Q 平衡
symbols_matrix = symbols_matrix/sqrt(2);
% 带通滤波器
n = 0:1/Fs:(Tb*N-1/Fs);
filter = sin(pi*n/Tb).*sqrt(2/Tb).*cos(2*pi*Fc*n);
signal = reshape(filter*reshape(symbols_matrix, [N*L, 1]), [1, N*Tb*Fs]);
% 加入高斯白噪声
snr_db = 10;
snr_lin = 10^(snr_db/10);
P_signal = mean(abs(signal).^2);
P_noise = P_signal/snr_lin;
noise = sqrt(P_noise/2)*(randn(1, N*Tb*Fs) + 1i*randn(1, N*Tb*Fs));
signal_noise = signal + noise;
% 解调器
demod_filter = fliplr(filter);
demod_signal = conv(signal_noise, demod_filter);
% 采样
sampled_signal = demod_signal(Fs*Tb/2:Fb*Tb:N*Tb*Fs);
% 决策器
decoded_signal = sampled_signal > 0;
% 比特错误率计算
BER = sum(xor(decoded_signal, data))/(N*L)
% 显示结果
figure();
subplot(2, 1, 1);
plot(real(signal_noise));
title('Baseband signal with noise');
subplot(2, 1, 2);
plot(decoded_signal);
title('Decoded signal');
```
请注意,此代码仅为演示目的。如果您需要更复杂的蓝牙通信系统,需要更加深入的了解蓝牙协议的细节。