NDLI: Symbol synchronization and data detection in DS/CDMA systems affected by multiple narrowband interferers

Content Provider	IEEE Xplore Digital Library
Author	Buzzi, S. Lops, M.
Copyright Year	2006
Description	Author affiliation: DAEIMI, Universita degli Studi di Cassino, Italy (Buzzi, S.; Lops, M.)
Abstract	We consider an asynchronous direct-sequence code division multiple access (DS/CDMA) system operating in a frequency band partially occupied by several narrowband communication signals. The problem of symbol timing recovery and reliable data detection for the CDMA users is considered in this paper. First of all, we show that conventional timing and data detection, based on the matched filter, does incur a severe performance loss in the presence of several narrowband interferers and CDMA users. We thus propose two digital reception algorithm which are resistant to narrowband interferers. The first algorithm performs interference cancellation; it may be used in a centralized receiver wherein the narrowband signals have been acquired and detected. The second algorithm operates on a frequency-domain representation of the data. A new symbol synchronization algorithm is also given; this procedure operates on the samples of the received signal (i.e., synchronization is extracted processing the discrete-time data rather than the continuous-time observables). Results show that the proposed algorithms achieve performance levels much larger than those of the conventional algorithms based on matched filtering.
Starting Page	371
Ending Page	374
File Size	1578565
Page Count	4
File Format	PDF
ISBN	0780394127
DOI	10.1109/RWS.2006.1615172
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Narrowband Frequency synchronization Timing Matched filters Filtering algorithms Frequency conversion Performance loss Interference cancellation Signal processing
Content Type	Text
Resource Type	Article

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