Minimum bit error rate beamforming receiver for space-division multiple-access based quadrature amplitude modulation systems


Chen, Sheng, Zhang, Jiankang, Mu, Xiaomin and Hanzo, Lajos (2012) Minimum bit error rate beamforming receiver for space-division multiple-access based quadrature amplitude modulation systems. In, 2012 IEEE Wireless Communications and Networking Conference, Paris, FR, 01 - 04 Apr 2012. 5pp.

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Description/Abstract

We considers the beamforming assisted multipleantenna receiver for space-division multiple-access based multiuser systems that employ high-throughput quadrature amplitude modulation (QAM) signalling. The bit error ratio (BER) expression as the function of the beamformer’s weight vector is derived, and the minimum BER (MBER) beamforming receiver is then obtained as the solution of the resulting optimisation problem that minimises the MBER criterion. A simplified conjugate gradient algorithm, which has previously demonstrated its effectiveness in solving the minimum symbol error ratio (MSER) optimisation problem, is employed to solve this MBER optimisation. For highorder QAM, although the bit decision is an inherently more complicated procedure than making a symbol decision, it turns out that the computational complexity of computing the MBER solution is similar to that of computing the MSER solution. As expected, our simulation results show that both the MBER and MSER systems achieve the same BER performance, and they significantly outperform the standard minimum mean squares error based solution.

Item Type: Conference or Workshop Item (Paper)
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Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions: Faculty of Physical Sciences and Engineering > Electronics and Computer Science > Comms, Signal Processing & Control
ePrint ID: 335732
Date Deposited: 13 Mar 2012 14:13
Last Modified: 27 Mar 2014 20:19
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/335732

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