Performance analysis and design of STBCs for frequency-selective fading channels

Authors:
R. Schober;W. H. Gerstacker;L. H.-J. Lampe
Affiliations:
Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada;-;-
Venue:
IEEE Transactions on Wireless Communications
Year:
2004

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Abstract

In this paper, space-time block-coded transmission over frequency-selective fading channels is investigated. A lower bound for the pairwise error probability for optimum detection is given. Also, an approximation for the bit-error rate is derived and compared with simulation results for maximum-likelihood sequence estimation (MLSE) for the GSM/EDGE (Enhanced Data Rates for GSM Evolution) system. Furthermore, a novel design rule for space-time block codes (STBCs) for frequency-selective fading channels is provided. A corresponding code is designed and shown to yield higher performance than Alamouti's code. It is demonstrated that for fading channels with L independent impulse response coefficients, STBCs designed for the flat fading channel can achieve at most a diversity order of (NT+L-1)NR if NT transmit antennas and NR receive antennas are used. On the other hand, the maximum diversity order employing the proposed code design rule is LNTNR.