Minimum probability of error for asynchronous Gaussian multiple-access channels
IEEE Transactions on Information Theory
Wideband CDMA For Third Generation Mobile Communications: Universal Personal Communications
Wideband CDMA For Third Generation Mobile Communications: Universal Personal Communications
Third Generation Mobile Communication Systems
Third Generation Mobile Communication Systems
Analysis of DS-CDMA parallel interference cancellation with phase and timing errors
IEEE Journal on Selected Areas in Communications
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For a simple CDMA system, we compute the bit-error probability (BEP)with soft-decisionparallel-interference-cancellation (SD-PIC). Instead of approximatingthe signal-to-noise ratio, we use a different measure to calculateperformance. This measure is the exponential rate of the BEP, i.e., thelimit of n−1 log(BEP) = −I, for the processinggain n→ ∞, where I depends only on the number of users. Weshow, using the rate as a measure, that SD-PIC improves the performance.The values of I follow as the solution of an optimization problem whichcan be calculated numerically. We use these results to derive theasymptotic behaviour of the rate for large k. We also derive results forthe second order asymptotics of the BEP. Inclusion of second orderasymptotics leads to excellent approximations.