8Processing Strategies for Wireless Systems
Abstract
In this chapter, we examine the evolution of processing strategies used for wireless communications, aiming to seek their underlying thoughts that may ignite inspiration for the future.
In this chapter, we re-examine the philosophical issue of processing strategies for wireless communications initiated in Chapter 1. Various physical channels encountered in wireless communications are imperfect in the sense that they introduce additive noise, distortion, and interference, therefore requiring various signal processing strategies for remedy.
8.1 Communication problem
For exposition, let us start from a particular received signal model. Suppose that a unipolar information-bearing bit vector 
is coded, modulated, and precoded for transmission over a communication channel defined by matrix 
. Let 
, 
, 
, and 
denote the matrices for coding, interleaving, ...
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