Linear Interference Cancellation in CDMA Systems and Large Deviations of the Correlation Matrix Eigenvalues
AC Anne Fey-den Boer, Remco van der Hofstad, MJ Klok · 2003
We analytically compute a mea- sure of performance of various linear Paral- lel Interference Cancellation (PIC) decod- ing schemes in the infinite stage limit, for moderately loaded CDMA systems with- out AWGN, or with a suciently small amount of AWGN. This measure is the ex- ponential rate of the BEP, which does not involve Gaussian approximations. We ob- tain these rates using large deviation the- ory for the eigenvalues of the code corre- lation matrix. We find that the decorre- lator performs best, followed by infinite- stage SD-PIC, which is found to perform better than infinite stage HD-PIC.