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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

There is no indication of lock.

You have killed the error by /1e5 then (5*10^-5) , this adds almost nothing to nco tuning word whose range is 0 ~ +/-0.5

for .1 case error should settle zero and filtered signal should be dc (I think you got that because error is forced to nothing)

for .09 and .11 case error should settle at .01 (either plus or minus) and filtered signal should be dc (not sine wave)