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Exact closed-form analytical expressions are derived for the average bit error probability of multi-branch switched diversity systems over independent and identically Nakagami-m distributed fading channels. Practical schemes that use non-coherent or differentially coherent symbol detection are considered. The general bit error probability expression derived in this paper includes as particular cases the following signaling formats: orthogonal binary signaling, correlated binary signaling, differential phase-shift keying, and differential quadrature phase-shift keying. Finally, the authors apply their analytical results to study the impact of the switching threshold selection on the system performance.
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