Selection of partial cancellation factors in DS-CDMA systems employing the generalized detector

Authors:
Vyacheslav Tuzlukov
Affiliations:
School of Electronic Engineering, Communications Engineering and Computer Science, Yeungnam University, Gyeongsan-si, Gyeongsangbuk-do, South Korea
Venue:
ICCOM'08 Proceedings of the 12th WSEAS international conference on Communications
Year:
2008

Citing 4
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Optimal combining, partial cancellation, and channel estimation and correlation in DS-CDMA systems employing the generalized detector

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Abstract

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 [1]-[5], 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 DS-CDMA 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 [5] and surpasses the BER performance of the real partial cancellation factor for DS-CDMA systems discussed in [6].