The Serial MLSE Multi-User Detection#br#
of the Multi-Path Asynchronous DS/CDMA Signals

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 1998, Vol. 21 ›› Issue (2): 51-55.

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The Serial MLSE Multi-User Detection#br# of the Multi-Path Asynchronous DS/CDMA Signals

Zhang Wurong, Wu Weiling

Department of Information Engineering, Beijing University of Posts and Telecommunications, Beijing 100876

Received:1997-05-19 Online:1998-03-10
Supported by:

Abstract

Abstract: The Maximum Likelihood Sequential Estimation (MLSE)algorithm of a asynchronous DS/CDMA system over time invariant channel is investigated firstly, then the MLSE detector over multi-path fading channel is detailed.Analyses show the computational complexity of a MLSE detector over multi-path fading channel is determined by the delay spread.If the delay spread is within one information bit, the multi-path MLSE has a complexity of O(2^k) which is the same of a MLSE algorithm over time invariant channel, while K is the number of users.The detector can be implemented by a dynamicprogramming algorithm such as Viterbi algorithm with variable state number.

Key words: cellular mobile communications, CDMA, multi-user detection, maximum likelihood sequential estimation

CLC Number:

TN929.5

Zhang Wurong, Wu Weiling. The Serial MLSE Multi-User Detection#br# of the Multi-Path Asynchronous DS/CDMA Signals[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 1998, 21(2): 51-55.

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The Serial MLSE Multi-User Detection#br# of the Multi-Path Asynchronous DS/CDMA Signals

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