matlab lms算法例子
时间: 2023-09-04 08:10:50 浏览: 44
Sure, here is an example of LMS algorithm implementation in MATLAB:
```matlab
% Define input signal, desired signal and step size
x = [1 0 -1 0 1 0 -1 0 1 0]';
d = [1 0 0 0 1 1 0 0 1 1]';
mu = 0.05;
% Initialize weights and error vector
w = zeros(size(x));
e = zeros(size(x));
% Run LMS algorithm
for i = 1:length(x)
y = w' * x; % Compute output
e(i) = d(i) - y; % Compute error
w = w + mu * e(i) * x(i); % Update weights
end
% Plot results
subplot(311); stem(x); title('Input signal');
subplot(312); stem(d); title('Desired signal');
subplot(313); stem(e); title('Error signal');
```
This code implements the LMS algorithm for adaptive filtering. It takes an input signal `x`, a desired signal `d`, and a step size `mu`, and updates the filter weights using the LMS update rule. The code also computes the error signal `e` as the difference between the desired signal and the filter output.
Hope that helps!
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