Abstract
We present an analysis of coded modulation with block differential detection in a correlated Rician fading channel with space diversity. Coded differential PSK is included in our analysis as a special case. Through cut-off rate analysis we compare different coded channels resulting from the choice of the block length N and the diversity order M with slow fading. With fast fading, the simple branch metric considered is not maximum-likelihood. By deriving a necessary and sufficient condition for the existence of an error floor, we show that, when the fading is not slow, it always exists, and decreases exponentially with the product of code diversity and space diversity.
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