TY - GEN

T1 - An adaptive multiuser interference rejection algorithm for direct-sequence code division multiple access

AU - Mandayam, Narayan B.

AU - Aazhang, Behnaam

PY - 1994

Y1 - 1994

N2 - In this paper we consider a direct sequence code division multiple access (DS-CDMA) system from the framework of a discrete event dynamic system (DEDS) and develop infinitesimal perturbation analysis (IPA) for estimating the sensitivity of the average probability of bit-error in such systems. The above estimates are shown to be unbiased, and this technique is then further incorporated into a stochastic gradient algorithm for achieving adaptive multiuser interference rejection. Specifically, we develop an algorithm for an adaptive linear detector with the average probability of error being the minimization criterion. This algorithm is shown to converge, and the resulting detector performs better than both the matched filter detector as well as the minimum mean squared error (MMSE) detector.

AB - In this paper we consider a direct sequence code division multiple access (DS-CDMA) system from the framework of a discrete event dynamic system (DEDS) and develop infinitesimal perturbation analysis (IPA) for estimating the sensitivity of the average probability of bit-error in such systems. The above estimates are shown to be unbiased, and this technique is then further incorporated into a stochastic gradient algorithm for achieving adaptive multiuser interference rejection. Specifically, we develop an algorithm for an adaptive linear detector with the average probability of error being the minimization criterion. This algorithm is shown to converge, and the resulting detector performs better than both the matched filter detector as well as the minimum mean squared error (MMSE) detector.

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U2 - 10.1109/ISIT.1994.394840

DO - 10.1109/ISIT.1994.394840

M3 - Conference contribution

AN - SCOPUS:84894386543

SN - 0780320158

SN - 9780780320154

T3 - IEEE International Symposium on Information Theory - Proceedings

SP - 135

BT - Proceedings - 1994 IEEE International Symposium on Information Theory, ISIT 1994

T2 - 1994 IEEE International Symposium on Information Theory, ISIT 1994

Y2 - 27 June 1994 through 1 July 1994

ER -