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Fading performance evaluation of a semi-blind space-time equaliser for frequency selective MIMO systems

Fading performance evaluation of a semi-blind space-time equaliser for frequency selective MIMO systems
Fading performance evaluation of a semi-blind space-time equaliser for frequency selective MIMO systems
A semi-blind adaptive space–time equaliser (STE) has recently been proposed based on a concurrent gradient-Newton(GN) constant modulus algorithm (CMA) and soft decision-directed (SDD) scheme for dispersive multiple-input multiple-output (MIMO) systems that employ high-throughput quadrature amplitude modulation signalling. A minimum number of training symbols, approximately equal to the dimension of the STE, is used to provide a rough initial estimate of the STE’s weight vector. The concurrent GN based CMA and SDD blind adaptive scheme is then adopted to adapt the STE. This semi-blind STE has a complexity similar to that of the training-based recursive least squares (RLS) algorithm. For stationary MIMO channels, it has been demonstrated that this semi-blind adaptive STE is capable of converging fast to the optimal minimum mean square error STE solution. In this contribution, we investigate the performance of this semi-blind adaptive STE operating in Rayleigh fading MIMO systems. Our results obtained show that the tracking performance of this semi-blind adaptive algorithm is close to that of the training-based RLS algorithm. Thus, this semi-blind adaptive STE offers an effective and practical means to successfully operate under the highly dispersive and fading MIMO environment.
2823-2838
Cheng, Huiting
a79d31d4-0295-4760-a8fa-0da77bad71fc
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Cheng, Huiting
a79d31d4-0295-4760-a8fa-0da77bad71fc
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80

Cheng, Huiting and Chen, Sheng (2011) Fading performance evaluation of a semi-blind space-time equaliser for frequency selective MIMO systems. Journal of the Franklin Institute, 348 (10), 2823-2838.

Record type: Article

Abstract

A semi-blind adaptive space–time equaliser (STE) has recently been proposed based on a concurrent gradient-Newton(GN) constant modulus algorithm (CMA) and soft decision-directed (SDD) scheme for dispersive multiple-input multiple-output (MIMO) systems that employ high-throughput quadrature amplitude modulation signalling. A minimum number of training symbols, approximately equal to the dimension of the STE, is used to provide a rough initial estimate of the STE’s weight vector. The concurrent GN based CMA and SDD blind adaptive scheme is then adopted to adapt the STE. This semi-blind STE has a complexity similar to that of the training-based recursive least squares (RLS) algorithm. For stationary MIMO channels, it has been demonstrated that this semi-blind adaptive STE is capable of converging fast to the optimal minimum mean square error STE solution. In this contribution, we investigate the performance of this semi-blind adaptive STE operating in Rayleigh fading MIMO systems. Our results obtained show that the tracking performance of this semi-blind adaptive algorithm is close to that of the training-based RLS algorithm. Thus, this semi-blind adaptive STE offers an effective and practical means to successfully operate under the highly dispersive and fading MIMO environment.

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Published date: December 2011
Organisations: Southampton Wireless Group

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Local EPrints ID: 272969
URI: http://eprints.soton.ac.uk/id/eprint/272969
PURE UUID: 6587596f-eb72-48e1-a200-a3a901384ab2

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Date deposited: 31 Oct 2011 09:29
Last modified: 30 Sep 2020 16:32

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