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Coded Modulation for Multiple Antennas over Fading Channels

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Coded Modulation for Multiple Antennas over Fading Channels

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    1. Coded Modulation for Multiple Antennas over Fading Channels

    2. Outline Signaling over Wireless Channels Fading Channels Diversity techniques Channel Coding, Space-time Coding for Multiple Antenna Systems Space-time architectures Turbo- and Trellis-Coded Space-Time Modulation

    3. Introduction

    8. Capacity Results for known CSI

    10. Space-Time Trellis Codes Diversity order is Nr, where r is minimum rank of B=S-S over the set of two tuples of distinct codewords. Coding gain is (?1 ?2 ?r)1/r, where ?i are non-zero eigenvalues of BBH.

    14. Capacity Results for no CSI case Block fading channel, T: coherence time of the channel. Capacity does not increase as number of transmit antennas increases beyond the coherence time! Capacity achieving signals have considerable structures: Isotropically distributed random vectors x Diagonal random matrix For M=N, the capacity increases by K(1-K/T) bits/s/Hz for every 3 dB SNR increase where K= min(r, T/2).

    15. Space-Time Codes when CSI is not available

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