Recursive delay estimation and demodulation of asynchronous DS-CDMA signals

T. Ratnarajah, N. H. Dowlut, Z. Q. Luo, K. M. Wong

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

Abstract

In this paper we compare several near-far resistant recursive delay tracking algorithms and propose a robust multi-user detection scheme for asynchronous DS-CDMA systems. The delay tracking algorithms are based on the so-called 'propagator method' which permit direct update of the noise subspace from the collected data via a chosen criterion. The estimated delays are then used to demodulate the received signal using a robust formulation of the decorrelating receiver. We compare the tracking performance of the LMS, exponentially weighted RLS, exponentially weighted H and time-varying H solutions, and also compare the performance of our robust receiver with the decorrelating and MMSE receivers.

Original languageEnglish (US)
Title of host publicationIEEE Signal Processing Workshop on Statistical Signal and Array Processing, SSAP
Editors Anon
PublisherIEEE Comp Soc
Pages112-115
Number of pages4
StatePublished - Dec 1 1998
EventProceedings of the 1998 9th IEEE SP Workshop on Statistical Signal and Array Processing - Portland, OR, USA
Duration: Sep 14 1998Sep 16 1998

Other

OtherProceedings of the 1998 9th IEEE SP Workshop on Statistical Signal and Array Processing
CityPortland, OR, USA
Period9/14/989/16/98

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    Ratnarajah, T., Dowlut, N. H., Luo, Z. Q., & Wong, K. M. (1998). Recursive delay estimation and demodulation of asynchronous DS-CDMA signals. In Anon (Ed.), IEEE Signal Processing Workshop on Statistical Signal and Array Processing, SSAP (pp. 112-115). IEEE Comp Soc.