NDLI: Impact of spatial correlation on the spectral efficiency of wireless OFDM systems using multiple antenna techniques

Content Provider	IEEE Xplore Digital Library
Author	Sartori, P.J. Baum, K.L. Vook, F.W.
Copyright Year	2002
Description	Author affiliation: Commun. Syst. & Res. Lab., Motorola Labs., Schaumburg, IL, USA (Sartori, P.J.; Baum, K.L.; Vook, F.W.)
Abstract	Multiple antenna techniques (MAT) are expected to be used in next generation cellular systems to provide higher capacity, higher data rates and improved signal quality. In this paper, the spectral efficiency of a broadband mobile OFDM system using ideal adaptive modulation/coding is evaluated for various multiple antenna techniques. A generic model to evaluate the system performance for such a complex system is presented. Cellular system-level results are given for a single transmit antenna, dual transmit diversity with Alamouti encoding, and various MIMO techniques (idealized and practical). The impact of spatial correlation of the fading on the system performance is studied and quantified. Results indicate that the theoretical MIMO capacity is only moderately sensitive to correlated fading at the receive array with uncorrelated fading at the transmit array. Moreover, a practical scheme using a separate stream on each transmit antenna with a linear MMSE receiver is found to be much more sensitive to correlated fading. When the TX and RX arrays consist of only two antennas, Alamouti encoding with receive diversity is a simple technique that performs quite well.
Starting Page	1150
Ending Page	1154
File Size	569138
Page Count	5
File Format	PDF
ISBN	0780374843
DOI	10.1109/VTC.2002.1002794
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-05-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fading Broadband antennas System performance Encoding MIMO Receiving antennas Adaptive systems Modulation coding OFDM modulation Adaptive arrays
Content Type	Text
Resource Type	Article

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