NDLI: Space-time coding for single-carrier block-spread CDMA cellular downlink

Content Provider	IEEE Xplore Digital Library
Author	Petre, F. Leus, G. Deneire, L. Moonen, M.
Copyright Year	2003
Description	Author affiliation: IMEC, Leuven, Belgium (Petre, F.; Leus, G.; Deneire, L.; Moonen, M.)
Abstract	The combination of space-time block coding (STBC) and direct-sequence code division multiple access (DS-CDMA) has the potential to increase the performance of multiple users in a cellular environment. However, if not carefully designed, the resulting communication scheme suffers from increased multi-user interference (MUI), which dramatically deteriorates the performance. To tackle this MUI problem in the downlink, we combine two specific CDMA and STBC techniques, namely single-carrier block-spread (SCBS) CDMA and time-reversal (TR) STBC. The resulting transceiver allows for deterministic maximum likelihood (ML) user separation through low-complexity code-matched filtering as well as deterministic transmit stream separation through linear processing. These properties guarantee maximum diversity gains of N/sub T/N/sub R/(L+1) for every user in the system, irrespective of the system load, where N/sub T/ is the number of transmit antennas, N/sub R/ the number of receive antennas and L the order of the underlying multipath channels. Moreover, it turns out that a low-complexity linear receiver based on frequency-domain equalization comes close to extracting the full diversity in reduced as well as full load settings.
Starting Page	2345
Ending Page	2349
File Size	373653
Page Count	5
File Format	PDF
ISBN	0780379748
DOI	10.1109/GLOCOM.2003.1258654
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-12-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Downlink Receiving antennas Block codes Interference Transceivers Nonlinear filters Filtering Diversity methods Loaded antennas
Content Type	Text
Resource Type	Article

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