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Space Time State Trellis Codes for MIMO Systems Using Reconfigurable Antennas

机译：使用可重配置天线的MIMO系统的时空状态网格码

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摘要

We present a novel class of space time trellis codes based on super quasi-orthogonal space time codes for a reconfigurable antenna system. We call them space time state trellis codes (STSTCs). We design for 4 trellis states and both 2 and 4 branch trellis structures for BPSK and QPSK constellations. The proposed codes take advantage of the additional degrees of diversity offered by reconfigurable antennas and changing propagation states. They achieve full rate, full diversity and high coding gain. Simulation results demonstrate their good performance. STSTCs achieve the diversity order expected of four transmit antennas while using only two reconfigurable transmit antennas. Our code out performs the existing super orthogonal space time trellis code, which fails to achieve full diversity in a reconfigurable antenna system. The proposed 4 trellis state STSTC is designed based on the following performance criteria: minimum coding gain distance of the minimum return path (CGD MRP), performance factor (PF), rank of the partial valid path (RPVP) on top of traditional minimum coding gain distance of parallel path (CGD PP). We show through analysis and simulations that minimum CGD PP is not a sufficient criteria and that additional performance gains are provided by considering the CGD MRP.
机译：我们提出了一种基于超准正交时空码的新型时空网格码，用于可重构天线系统。我们称它们为时空状态格码（STSTC）。我们为BPSK和QPSK星座图设计了4种网格状态以及2和4个分支网格结构。提议的代码利用了可重构天线和不断变化的传播状态所提供的额外分集度。它们实现了全速率，全分集和高编码增益。仿真结果证明了它们的良好性能。 STSTC在仅使用两个可重新配置的发射天线的同时，实现了四个发射天线的预期分集阶数。我们的代码输出执行现有的超正交空时网格代码，这在可重构天线系统中无法实现完全分集。根据以下性能标准设计建议的4种格状状态STSTC：最小返回路径的最小编码增益距离（CGD MRP），性能因子（PF），部分有效路径的等级（RPVP）在传统最小编码的基础上平行路径的增益距离（CGD PP）。通过分析和模拟，我们表明最小的CGD PP不足以满足要求，并且通过考虑CGD MRP可以提供额外的性能提升。

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