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An Optimized-Hierarchy-Aided Approximate Log-MAP Detector for MIMO Systems

An Optimized-Hierarchy-Aided Approximate Log-MAP Detector for MIMO Systems
An Optimized-Hierarchy-Aided Approximate Log-MAP Detector for MIMO Systems
Abstract—In this paper we propose a novel Space Division Multiplexing (SDM) detection method. The proposed technique constitutes a list search method and may be regarded as an advanced extension of the Sphere Decoder (SD). Our method may be employed in the so-called over-loaded scenario, where the number of transmit antenna elements exceeds that of the receive antenna elements. Furthermore, it is suitable for highthroughput, non-constant modulus modulation schemes, such as 16 and 64-QAM. We introduce a series of optimization rules which facilitate a substantial reduction in computational complexity. More specifically, we demonstrate that the method proposed, which we refer to as the Soft-output OPtimized HIErarchy (SOPHIE)-aided SDM detector exhibits the near-optimum performance of Log-MAP SDM detector in all considered scenarios. The associated computational complexity, which we control using two complexity-control parameters, is substantially lower than that imposed by all previously proposed methods. Index Terms—Bell Labs layered space-time (BLAST), fading channels, maximum likelihood (ML) detection, smart antennas, sphere decoding, turbo codes, wireless communications.
1900-1909
Akhtman, J.
d4fd2b26-c123-463d-847c-80adc83a89fa
Wolfgang, A.
e87811dd-7028-4ac3-90cc-62003ff22202
Chen, S.
ac405529-3375-471a-8257-bda5c0d10e53
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Akhtman, J.
d4fd2b26-c123-463d-847c-80adc83a89fa
Wolfgang, A.
e87811dd-7028-4ac3-90cc-62003ff22202
Chen, S.
ac405529-3375-471a-8257-bda5c0d10e53
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Akhtman, J., Wolfgang, A., Chen, S. and Hanzo, L. (2007) An Optimized-Hierarchy-Aided Approximate Log-MAP Detector for MIMO Systems. IEEE Transactions on Wireless Communications, 6 (5), 1900-1909.

Record type: Article

Abstract

Abstract—In this paper we propose a novel Space Division Multiplexing (SDM) detection method. The proposed technique constitutes a list search method and may be regarded as an advanced extension of the Sphere Decoder (SD). Our method may be employed in the so-called over-loaded scenario, where the number of transmit antenna elements exceeds that of the receive antenna elements. Furthermore, it is suitable for highthroughput, non-constant modulus modulation schemes, such as 16 and 64-QAM. We introduce a series of optimization rules which facilitate a substantial reduction in computational complexity. More specifically, we demonstrate that the method proposed, which we refer to as the Soft-output OPtimized HIErarchy (SOPHIE)-aided SDM detector exhibits the near-optimum performance of Log-MAP SDM detector in all considered scenarios. The associated computational complexity, which we control using two complexity-control parameters, is substantially lower than that imposed by all previously proposed methods. Index Terms—Bell Labs layered space-time (BLAST), fading channels, maximum likelihood (ML) detection, smart antennas, sphere decoding, turbo codes, wireless communications.

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Published date: May 2007
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 264036
URI: https://eprints.soton.ac.uk/id/eprint/264036
PURE UUID: e3f96a2a-181f-4b22-874c-07e4f6e49e59
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

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Date deposited: 21 May 2007
Last modified: 20 Jul 2019 01:26

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