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Altera_Forum
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11 years ago

BPSK Demodulation

Hello again, I am still struggling with BPSK demodulation :) OK, now I am trying to implement Costas Loop for carrier synchronization, which involves Inphase and Quadrature Phase paths. Inpha...
Altera_Forum's avatar
Altera_Forum
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11 years ago

Hi, KAZ.

I modeled it in MATLAB.

After converting to DC, I am filtering using a FIR filter that utilizes Hamming window. The output of the filters are not clear of f1+f2 though! High component frequency is just attenuated, is this the purpose or I need to completely eliminate it? If I need so, filter required is of order 200+!! I think that's very much resource consuming when it's ported to FPGA, right?

Regarding IIR filter, how do I design it? Do I use fdatool in MATLAB? or the structure I attached above is good?