Estimation and Synchronization
So far in this book, we have considered two channel effects. Prior to Chapter 9, we considered channels adding a noisen(t) o the sent signal. In Chapter 9, we said the channel in fact added more than just a noise; it also acted as a filter with impulse response c(t). In this chapter, we again add to what channels do–we make them more realistic.
In addition to noise and/or filtering, channels also add unwanted parameters to the sent signal. For example, take a look at Figure 10.1. There you see that the modulator sent the signal
Figure 10.1 Channel effects
which might, for ...