matlab实现基于互谱阵的DOA估计
时间: 2023-12-10 13:04:26 浏览: 36
您好,基于互谱阵的DOA估计是一种常见的声源定位方法,通过计算阵列中不同微信号之间的互相关函数,从而得到声源到达角度的估计。在Matlab中,可以使用phased库中的phased.ULA类和phased.interha函数来实现这一算法,具体实现方式可以参考以下代码:
% 定义阵列和信号参数
array = phased.ULA('NumElements',8,'ElementSpacing',0.5);
angles = [-30 10];
fc = 1e9;
waveform = phased.Waveform('SampleRate',fc*20,'PulseWidth',1e-6);
fs = waveform.SampleRate;
% 生成接收信号
x = phased.Transmitter('PeakPower',0.5,'OutputSamplingRate',waveform.SampleRate);
xpos = [0;0;0];
rx = phased.ReceiverPreamp('Gain',20,'NoiseFigure',5);
rxpos = [0;0;0];
channel = phased.FreeSpace('PropagationSpeed',physconst('LightSpeed'),'OperatingFrequency',fc,'TwoWayPropagation',true);
rng(2019);
for ind = 1:length(angles)
signal = x(waveform());
signal = channel(signal,xpos,rxpos,angles(ind));
received(:,ind) = rx(signal);
end
% 计算互谱阵和DOA
S = received*received';
S = S./trace(S);
invS = inv(S);
w = phased.weights.ESPRIT('SensorArray',array,'DOAOutputPort',true,'NumSignals',1);
[~,doas] = w(received);
请注意,这只是一个简单的示例,实际应用中需要根据具体情况进行更改和优化。感谢您的提问!
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