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The implementation of decision feedback equalization-based receivers for MIMO systems that employ hybrid ARQ (HARQ) is considered. It is shown how the theory of MIMO decision feedback equalization can be applied to derive optimal DFE architectures for the case of MIMO HARQ. Incremental structures are proposed that reduce the implementation complexity of the DFE and the memory requirements at the receiver...
Hybrid automatic repeat request (HARQ) improves the throughput performance of ARQ by combining retransmission of packets with forward error correction coding. In MIMO systems employing HARQ and equalization, optimal performance at the receiver is obtained when the signals corresponding to each transmission are combined before the equalizer. Performance can be exchanged for reduced receiver memory...
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