MATLAB: FIR filter with LMS algorithm

channel equaliserfirfir filterleast mean squarelms

Hello I am trying to implement a FIR Filter that uses the Least Mean Square algorithm for channel equalisation but I am struggling to get started as I am new to matlab, I hear using simulink would be easier/simpler but the brief says it should be in Matlab Code?

Best Answer

Do you have the DSP System Toolbox? If so, see adaptfilt.lms

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MATLAB: Are there differences in the filter coefficients generated via FDATool and from using the MATLAB command ‘fdesign.lowpass’

FDESIGN uses the FIRGR function while FDATool uses the FIRPM function.

FIRGR and FIRPM both design equiripple filters but they use different implementations of the Parks-McClellan algorithm. Thus, they may return different answers.

In order to design filters graphically and ensure that the results are consistent with FDESIGN, use the FilterBuilder GUI instead of FDATool.

MATLAB: FIR filter

   b = firls(30,[0 .1 .2 .5]*2,[1 1 0 0]);
   fvtool(b);

Obviously you have to specify more than the order. You have to give your frequencies and the amplitudes you wish at those frequencies. I have just used some values above.

Please read the reference page for firls.

Also, I'm assuming that you mean this filter and not the LMS adaptive FIR filter.

Best Answer

Related Solutions

MATLAB: Are there differences in the filter coefficients generated via FDATool and from using the MATLAB command ‘fdesign.lowpass’

MATLAB: FIR filter

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