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Maximum-Likelihood Sequence Detection of Multiple Antenna Systems over Dispersive Channels via Sphere Decoding

Vikalo, Haris and Hassibi, Babak (2002) Maximum-Likelihood Sequence Detection of Multiple Antenna Systems over Dispersive Channels via Sphere Decoding. EURASIP Journal on Applied Signal Processing, 2002 (5). pp. 525-531. ISSN 1110-8657. http://resolver.caltech.edu/CaltechAUTHORS:VIKeurasipjasp02

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Abstract

Multiple antenna systems are capable of providing high data rate transmissions over wireless channels. When the channels are dispersive, the signal at each receive antenna is a combination of both the current and past symbols sent from all transmit antennas corrupted by noise. The optimal receiver is a maximum-likelihood sequence detector and is often considered to be practically infeasible due to high computational complexity (exponential in number of antennas and channel memory). Therefore, in practice, one often settles for a less complex suboptimal receiver structure, typically with an equalizer meant to suppress both the intersymbol and interuser interference, followed by the decoder. We propose a sphere decoding for the sequence detection in multiple antenna communication systems over dispersive channels. The sphere decoding provides the maximum-likelihood estimate with computational complexity comparable to the standard space-time decision-feedback equalizing (DFE) algorithms. The performance and complexity of the sphere decoding are compared with the DFE algorithm by means of simulations.


Item Type:Article
Additional Information:Released under a “Creative Commons Attribution License,” enabling the unrestricted use, distribution, and reproduction of an article in any medium, provided that the original work is properly cited. Received 6 May 2001 and in revised form 28 March 2002.
Subject Keywords:sphere decoding, maximum-likelihood, multiple antennas, dispersive channels, computational complexity
Record Number:CaltechAUTHORS:VIKeurasipjasp02
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:VIKeurasipjasp02
Alternative URL:http://dx.doi.org/10.1155/S1110865702204011
Official Citation:Haris Vikalo and Babak Hassibi, “Maximum-Likelihood Sequence Detection of Multiple Antenna Systems over Dispersive Channels via Sphere Decoding,” EURASIP Journal on Applied Signal Processing, vol. 2002, no. 5, pp. 525-531, 2002. doi:10.1155/S1110865702204011
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9259
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:03 Dec 2007
Last Modified:26 Dec 2012 09:47

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