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spread spectrum - convoultion coding for CDMA systems

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bimsriraj

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spread spectrum

hi,
where convoultion coding will be used for CDMA systems before spreading the data or after spreading & why?
 

spread spectrum

me to
 

spread spectrum

before spreading... why... for obvious reasons, after spreading we would have to do conv coding for more bits, at a higher data rate, thats not too bad, right? but what about the subsequent viterbi decoding at higher rate and for more bits?

There are other reasons too.
 

spread spectrum

thanks communication engineer
 

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