Zhu, H. and Xia, B. and Tan, Z. (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.
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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.
|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:||28 Aug 2012 08:27|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/30182 (The current URI for this page, for reference purposes)|
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