Chapter 16Low‐complexity demodulators
In this chapter, we discuss modulation and demodulation schemes that are well suited for applications to mobile radio systems because of their simplicity, low‐power consumption, and robustness against disturbances introduced by the transmission channel.
16.1 Phase‐shift keying
In phase‐shift keying (PSK), values of 
are given by (6.8). A PSK transmitter for 
is shown in Figure 16.1. The bit mapper (BMAP) maps a sequence of 
bits to a constellation point represented by 
. The quadrature components 
and 
are input to interpolator filters 
. The filter output signals are multiplied by the carrier signal, 
, and by the carrier signal phase‐shifted by , for ...
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