Lecture7 - E4703 Wireless Communications Slide Set 7...

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E4703 Wireless Communications Slide Set 7
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Outline Summary of last lecture. Introduction to Diversity. Receiver diversity: ¾ Selection combining. ¾ Threshold combining. ¾ Maximum-ratio combining. ¾ Equal-gain combining. Transmit diversity. ¾ Transmitter CSI ¾ No Transmitter CSI: the Alamouti scheme
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Summary of Last Lecture Derived exact and approximate error probabilities for various constellations in AWGN (no fading): ¾ For BPSK and QPSK, exact and approximate. ¾ For M-PSK, only approximate. ¾ For M-PAM, exact. ¾ For M-QAM, exact and approximate. Synthesize above approximations into the general formula where α M and β M depend on the modulation. Derived exact error probability also for DPSK. For slowly fading channels, relevant performance metric is the outage probability. ) ( ) ( s M M s e Q P γ β α γ
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