Lattice Coding and Decoding for Multiple-Antenna Ergodic Fading Channels
Lattice Coding and Decoding for Multiple-Antenna Ergodic Fading Channels
复制标题
多天线遍历衰落信道的点阵编码和解码
DOI：
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发表时间：
2017
影响因子：
8.3
通讯作者：
Aria Nosratinia
中科院分区：
文献类型：
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作者：
Ahmed Hindy;Aria Nosratinia
对于千古褪色，提出了晶格编码和解码策略，并分析了单输入单输出（SISO）和多输入多输出（MIMO）的性能，以及多个点对点通道访问通道（MAC），仅在接收方（CSIR）上获得频道状态信息。在解码器上，提出了一种新的策略，该策略由随时间变化的均衡矩阵组成，然后是仅取决于信道统计的决策区域，而不是个人实现。我们的编码器具有与Erez和Zamir相似的结构。对于SISO通道，在各种褪色的分布下，容量的差距是由常数界定的。对于瑞利褪色下的MIMO通道，所达到的速率在于不取决于信噪比（SNR）（SNR）的容量差距范围内，并且随接收天线的数量减少。分析扩展到$ k $ - 用户Mac，在该Mac中得出了类似的结果。在限制CSIR向均衡器的情况下实现较小的差距，突出了有效解码器实现的范围，因为决策区是固定的，即独立于渠道实现。
For ergodic fading, a lattice coding and decoding strategy is proposed and its performance is analyzed for the single-input single-output (SISO) and multiple-input multiple-output (MIMO) point-to-point channel as well as the multiple-access channel (MAC), with channel state information available only at the receiver (CSIR). At the decoder a novel strategy is proposed consisting of a time-varying equalization matrix followed by decision regions that depend only on channel statistics, not individual realizations. Our encoder has a similar structure to that of Erez and Zamir. For the SISO channel, the gap to capacity is bounded by a constant under a wide range of fading distributions. For the MIMO channel under Rayleigh fading, the rate achieved is within a gap to capacity that does not depend on the signal-to-noise ratio (SNR), and diminishes with the number of receive antennas. The analysis is extended to the $K$ -user MAC where similar results hold. Achieving a small gap to capacity while limiting the use of CSIR to the equalizer highlights the scope for efficient decoder implementations, since decision regions are fixed, i.e., independent of channel realizations.