Robust discrete Fourier transform based receivers for continuous phase modulation

Novel data detection and channel estimation methods for coded and uncoded CPM signals

“…(3.11) allows us to detect the transmitted symbol a n . Performance results on the use of IF for symbol detection of CPM signals have been illustrated in [77][78][79]. As the IF estimation could be used for any modulation index without prior knowledge of it, if needed, the modulation index h could also be estimated using f av .…”

“…Unlike the VA, the IF based symbol detector has a similar computational complexity with any modulation index and alphabet size. However, the bit error performance offered by the IF based symbol detection is not satisfactory since it does not use the information at the phase [79]. As phase can be easily estimated once the frequency is estimated, in the following section, it will be shown that via differential encoding and phase estimation, the performance of the demodulator can be improved.…”