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Space-time decision feedback equalisation using a minimum bit error rate design for single-input multi-output channels

Space-time decision feedback equalisation using a minimum bit error rate design for single-input multi-output channels
Space-time decision feedback equalisation using a minimum bit error rate design for single-input multi-output channels
This contribution proposes a minimum bit error rate (MBER) decision feedback equaliser (DFE) designed for single-input multiple-output (SIMO) systems employing a quadrature phase shift keying (QPSK) modulation scheme. It is shown that this MBER design is superior over the standard minimum mean square error DFE in the SIMO scenario considered, in terms of the achievable system bit error rate. A sample-by-sample adaptive implementation of this MBER DFE is derived, which is referred to as the least bit error rate (LBER) algorithm. It is shown that for SIMO systems using a QPSK scheme, the LBER algorithm has a similar computational complexity as the simple least mean square (LMS) algorithm. Simulation results demonstrate that the proposed adaptive LBER-based DFE outperforms the adaptive LMS-based DFE, in both stationary and fading cases. Index Terms: Single-input multiple-output, multiple antennas, space-time processing, decision feedback equaliser, minimum mean square error, minimum bit error rate
671-678
Chen, S.
ac405529-3375-471a-8257-bda5c0d10e53
Wolfgang, A.
e87811dd-7028-4ac3-90cc-62003ff22202
Shi, Y.
88a0ad57-a5da-4dd1-93c8-a2833fdd6efb
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Chen, S.
ac405529-3375-471a-8257-bda5c0d10e53
Wolfgang, A.
e87811dd-7028-4ac3-90cc-62003ff22202
Shi, Y.
88a0ad57-a5da-4dd1-93c8-a2833fdd6efb
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Chen, S., Wolfgang, A., Shi, Y. and Hanzo, L. (2007) Space-time decision feedback equalisation using a minimum bit error rate design for single-input multi-output channels. IET Communications, 1 (4), 671-678.

Record type: Article

Abstract

This contribution proposes a minimum bit error rate (MBER) decision feedback equaliser (DFE) designed for single-input multiple-output (SIMO) systems employing a quadrature phase shift keying (QPSK) modulation scheme. It is shown that this MBER design is superior over the standard minimum mean square error DFE in the SIMO scenario considered, in terms of the achievable system bit error rate. A sample-by-sample adaptive implementation of this MBER DFE is derived, which is referred to as the least bit error rate (LBER) algorithm. It is shown that for SIMO systems using a QPSK scheme, the LBER algorithm has a similar computational complexity as the simple least mean square (LMS) algorithm. Simulation results demonstrate that the proposed adaptive LBER-based DFE outperforms the adaptive LMS-based DFE, in both stationary and fading cases. Index Terms: Single-input multiple-output, multiple antennas, space-time processing, decision feedback equaliser, minimum mean square error, minimum bit error rate

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Published date: August 2007
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 264386
URI: https://eprints.soton.ac.uk/id/eprint/264386
PURE UUID: 99225dc0-763d-4556-8f86-d64cc6aea57a
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

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Date deposited: 06 Aug 2007
Last modified: 05 Jan 2019 01:37

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