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STBC coded MISO and MIMO set-up in frequency selective wireless fading channels for BPSK and QPSK modulation schemes

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2 Author(s)
Gogoi, P. ; Dept. of Electron. & Commun. Eng., Gauhati Univ., Guwahati, India ; Sarma, K.K.

Diversity methods provide the receiver with independently faded copies of the transmitted signal with the expectation that at least one of these replicas will be received correctly. There are ranges of techniques available through which these faded copies can be recovered and used as part of arrangements for better reception. This paper proposes a method based on Space-Time Block Coding (STBC) with Multiple-Input Single-Output (MISO) and Multiple-Input Multiple-Output (MIMO) set-up for use in wireless channels. A special version of STBC called Alamouti code is used for exploiting the performance of MISO and MIMO in frequency-selective fading environment. Performance differences are observed with and without STBC in frequency selective faded channels. A comparison is made between the diversity gain of MISO and MIMO systems in terms of BER for two specific modulation schemes, namely BPSK and QPSK. The obtained results demonstrate that spatial diversity along with the power of STBC significantly improves the error performance in frequency selective wireless fading channels.

Published in:

Computational Intelligence and Signal Processing (CISP), 2012 2nd National Conference on

Date of Conference:

2-3 March 2012

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