Selection of Partial Cancellation Factors in DS-CDMA Systems Employing the Generalized Detector

摘要

This paper concerns with a procedure of selecting the partial cancellation factor for the first stage of a hard-decision partial parallel interference cancellation of the generalized detector, which is constructed based on the generalized approach to signal processing in noise in the case of direct-sequence code-division multiple access (DS-CDMA) systems. A range of the optimal partial cancellation factor, where the lower and upper boundary values can be explicitly calculated from the processing gain and the number of users of the DSCDMA system, is derived based on the Price's theorem. Computer simulation results confirmed that, using the average of these two boundary values as the partial cancellation factor for the first stage, we are able to reach the bit error rate (BER) performance that is very close to the potentially achieved BER performance under the use of the generalized detector and surpasses the BER performance of the real partial cancellation factor for DS-CDMA systems discussed in.