Analysis of an adaptive decorrelating detector for synchronous CDAM channel

U. Mitra, H. Vincent Poor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Multi-user detection allows for the efficient use of bandwidth in Code Division Multiple Access (CDMA) channels through mitigation of near-far effects and multiple-access noise limitations. The decorrelating detector, developed by Lupas, is a linear multi-user detector that is asymptotically optimal in terms of near far resistance. In this paper, a simple adaptive decorrelating detector is developed by placing constraints on the set of spreading codes to be used by the active users. This adaptive detector has two modules: it first decorrelates the existing users and then determines the spreading code of a new user entering the network with the use of a training sequence. Maximum Likelihood detection is proposed for determining the new user's spreading code. The performance of this algorithm is studied by investigating the probability of error as a function of the length of the training sequence, the number of users transmitting, and the signal to noise ratio of the new user with respect to the ambient Gaussian noise.

Original languageEnglish (US)
Title of host publicationIEE Conference Publication
Editors Anon
PublisherPubl by IEE
Pages155-160
Number of pages6
Edition387
ISBN (Print)0852966075
StatePublished - Dec 1 1993
EventProceedings of the 7th IEE European Conference on Mobile and Personal Communications - Brighton, UK
Duration: Dec 13 1993Dec 15 1993

Publication series

NameIEE Conference Publication
Number387
ISSN (Print)0537-9987

Other

OtherProceedings of the 7th IEE European Conference on Mobile and Personal Communications
CityBrighton, UK
Period12/13/9312/15/93

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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