Multiuser Detection Techniques for Narrowband Interference Suppression in Spread Spectrum Communications

Leslie A. Rusch, H. Vincent Poor

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

Due to the scarcity of frequency allocations for emerging personal communications services, it has been proposed that spread spectrum (SS) signals be used in such services so that they can be overlaid on existing frequency band occupants. Such SS signals would be constrained in power so as not to interfere with pre-existing, narrowband users. In view of this application, suppression of strong narrowband signals that interfere with commercial SS communications systems is being investigated with renewed interest. Previous research has modeled narrowband users as sinusoidal or autoregressive signals, and consequently has advocated use of predictive filtering to suppress such signals. In this paper it is shown that when the narrowband interferer is in fact a digital communications signal these methods are less effective than techniques derived from multiuser communications. In particular, by modeling a narrowband user as a digital signal, optimal and asymptotically (low background noise) optimal linear algorithms for the recovery of the SS bit stream are developed. This technique represents not only a promising new approach to narrowband interference suppression, but also a new application for multiuser detection theory.

Original languageEnglish (US)
Pages (from-to)1725-1737
Number of pages13
JournalIEEE Transactions on Communications
Volume43
Issue number234
DOIs
StatePublished - Jan 1 1995

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Multiuser Detection Techniques for Narrowband Interference Suppression in Spread Spectrum Communications'. Together they form a unique fingerprint.

  • Cite this