Performance Analysis of Alamouti Transmit Deiversity with QAM in Imperfect Channel Estimation

Zhu, Huiling and Xia, Bin and Tan, Zhenhui (2011) Performance Analysis of Alamouti Transmit Deiversity with QAM in Imperfect Channel Estimation. IEEE Journal on Selected Areas in Communications, 29 (6). pp. 1242-1248. ISSN 0733-8716. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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In this paper, the performance of multi-level quadrature amplitude modulation (M-QAM) systems is studied analytically when Alamouti space-time transmit diversity (STTD) coding is used for transmission over Rayleigh fading channels. The effect of self-interference (interference from another simultaneously transmitted symbol in the STTD scheme for the same user) due to imperfect channel estimation is investigated. Based on the characteristic function method, a closed-form expression of the bit error rate (BER) is derived. Numerical results for 16/64-QAM show that, with the Alamouti STTD technique, the BER performance of the QAM system can be improved significantly. The effect of receive antenna diversity is also investigated. It is shown that high-order QAM constellations can be employed even in low signal to noise ratio (SNR) with the transmit diversity technique in conjunction with receive antenna diversity.

Item Type: Article
Uncontrolled keywords: QAM; channel estimation error; Rayleigh fading; transmit diversity; antenna diversity
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunications > TK5103.4 Broadband (inc wireless broadband)
Divisions: Faculties > Science Technology and Medical Studies > School of Engineering and Digital Arts > Broadband & Wireless Communications
Depositing User: J. Harries
Date Deposited: 17 Aug 2012 12:54
Last Modified: 30 Apr 2014 15:50
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