Chapter 7Digital Communications BER Performance in AWGN (FSK in Fading)
7.1 FSK in Rayleigh and Rician Fading
This chapter discusses several topics in Simulink based on FSK modulation in fading channels. Specifically these topics include the following:
BFSK BER performance in Rayleigh fading
MFSK BER performance in Rayleigh fading
BFSK BER performance in Rician fading
CPFSK BER performance in Rician fading with Multipath
7.2 BFSK BER Performance in Rayleigh Fading
This section discusses BFSK BER performance in Rayleigh fading. A brief review of the theoretical BFSK BER performance for Rayleigh fading channels is provided in Appendix 7.A. The error probability for BFSK in Rayleigh fading assuming noncoherent detection is given by
where is the average SNR/bit. The time-varying nature of the channel is again characterized by its power spectral density according to the Jakes fading model presented in Chapter 6.
A simulation to estimate the BER for BFSK with noncoherent detection in Rayleigh fading is shown in Figure 7.1.
Figure 7.1Simulink Model for Estimation of BFSK BER in ...
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is the average SNR/bit. The time-varying nature of the channel is again characterized by its power spectral density 
according to the Jakes fading model presented in Chapter 6.