NDLI: Matched filtering with rate back-off for low complexity communications in very large delay spread channels

Content Provider	IEEE Xplore Digital Library
Author	Emami, M. Vu, M. Hansen, J. Paulraj, A.J. Papanicolaou, G.
Copyright Year	2004
Description	Author affiliation: Inf. Syst. Lab., Stanford Univ., CA, USA (Emami, M.; Vu, M.; Hansen, J.; Paulraj, A.J.)
Abstract	We study the possibility to transmit data over channels with large delay spreads under the constraint of a very simple receiver which has only one tap. Such a scheme is of interest when a cost-efficient way to transmit potentially high data rates are sought after. We investigate the performance of the optimal prefilter for this scheme and compare it to a simplified, so-called time-reversal (TR) prefilter which has very low complexity. At low SNRs, the TR prefilter and the optimal prefilter are equivalent. At high SNRs, the TR prefilter achieves a performance that is independent from the delay spread of the channel and hence its performance is the same for any bandwidth. In applications where bandwidth is abundant, such as ultra-wide band (UWB) communications, any required performance can be obtained by TR prefilters with a rate back-off transmission (i.e. transmission rate lower than the allowable bandwidth). Similar performance can also be obtained with full-rate transmission using several transmit antennas. This performance is guaranteed, since the high diversity of the large delay spread channel effectively eliminates any fading.
Starting Page	218
Ending Page	222
File Size	632263
Page Count	5
File Format	PDF
ISBN	0780386221
DOI	10.1109/ACSSC.2004.1399123
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-11-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Matched filters Filtering Delay Bandwidth Transmitting antennas Fading Transmitters Receiving antennas Information systems Laboratories
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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