Outline•Summary of last lecture.•Introduction to Diversity.•Receiver diversity:¾Selection combining.¾Threshold combining.¾Maximum-ratio combining.¾Equal-gain combining.•Transmit diversity.¾Transmitter CSI¾No Transmitter CSI: the Alamouti scheme
Summary of Last Lecture•Derived exact and approximate error probabilities for various constellations in AWGN (no fading):¾For BPSK and QPSK, exact and approximate.¾For M-PSK, only approximate.¾For M-PAM, exact.¾For M-QAM, exact and approximate.•Synthesize above approximations into the general formulawhere αMandβMdepend on the modulation.•Derived exact error probability also for DPSK.•For slowly fading channels, relevant performance metric is the outage probability.)()(sMMseQPγβαγ≈
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