Abstract
The present paper analyzes the effect of LDPC coding on the performances of a CDMA DS-SS multiuser system. Two types of detectors are analyzed, namely the conventional matched filter and the MMSE ones, in the ideal case--when the spreading codes are perfectly orthogonal and in a non-ideal one--when the users are more or less intercorrelated. Regarding the communication channel, several cases have been taken into consideration, from pure AWGN or Gaussian Mixture Noise to Rayleigh and Rice fading with different parameters. A large number of simulations have been performed using the Monte Carlo technique and the results are summarized and compared in the final part. Based on those results a number of interesting conclusions are highlighted in the Conclusion section.
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