Energy and spectral efficiencies of M-CPFSK in fading and shadowing wireless channels

Designing an efficient digital communication system requires trade-offs among Spectral Efficiency (SE), Energy Efficiency (EE), and system complexity. In this paper, these metrics are analyzed for an M-ary Continuous Phase Frequency Shift Keying (M-CPFSK) system based on average mutual information and normalized bandwidth of the system. The analysis is presented for arbitrary value of modulation index h (0