ABSTRACT
We present an overview of physical-layer techniques for space-time-coded signaling over broadband wireless channels. This includes a discussion of information-theoretic performance limits, transmitter techniques, and receiver signal processing techniques. The latter are classified into coherent or noncoherent techniques depending on whether channel knowledge at the receiver is required. Practical algorithms for multiple-antenna channel estimation under quasi-static and rapidly varying channel conditions are presented. Effective space-time algorithms for joint equalization/decoding and for interference cancellation are also described. We conclude with a discussion of future challenges. Throughout the chapter, our objective is to optimize the performance of space-time signal processing algorithms subject to practical complexity constraints.
