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The existing cooperative spatial multiplexing (CSM) schemes for MIMO-CDMA network have four vital problems to hinder CSM's application: exact synchronization among the mobile stations(MSs) and base station (BS), spatial channels' estimation for MSs, space-time coding and decoding for BS and MSs, the implementation complexity of BS and MSs. To solve the problems, a simplified cooperative spatial multiplexing...
In this paper, we study the strategy of Demodulation-and-Forward(DmF) based on joint network and channel coding and extend it to multi-user access relay channel . In DmF model, there are two users accessing the relay. Users encode original signals using LDPC codes. In the relay, we conduct demodulation instead of decoding and implement network coding that is the Demodulation-and-Forward(DmF) method...
In this paper, we investigate the low density parity-check (LDPC) decoding algorithms and the detection methods of the multiple-input multiple-output (MIMO) systems. For LDPC codes, min-sum and layered decoding algorithms are discussed, and for MIMO detection, the maximum likelihood (ML) decision based on the sphere decoding algorithm is mainly analyzed. Also, the performance of the combination of...
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