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Introduction to MIMO Communications by Jerry R. Hampton

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6   Alamouti coding

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This chapter describes the Alamouti space-time coding scheme [6] for achieving transmit diversity. As discussed in Chapter 1, Alamouti coding was one of the first space-time codes to be developed, and it is now included in the definition of all modern wireless standards that employ MIMO techniques. Although other transmit diversity techniques were proposed in the 1990s prior to Alamouti’s seminal paper (e.g. see [81], [82], and [79]), Alamouti’s technique has the following advantages over alternative schemes: a) it requires CSIR only (as opposed to requiring both CSIT and CSIR); b) it does not involve any bandwidth expansion, ...

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