Hybrid-ARQ scheme employing different space-time trellis codes in slow fading channels
Hybrid-ARQ scheme employing different space-time trellis codes in slow fading channels
复制标题
在慢衰落信道中采用不同空时网格码的混合ARQ方案
DOI：
10.1109/vetecf.2002.1040342
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Jae Hong Lee
中科院分区：
文献类型：
--
作者：
Y. Jung;Jae Hong Lee
我们考虑一种混合自动重传请求（ARQ）方案，采用不同的空时格码。通常，空时网格码的设计准则主要集中在最大成对错误概率的最小化上。然而，在慢衰落信道中，由于最大成对错误概率与其他成对错误概率相差不大，因此适当的设计技术必须考虑一些成对错误概率。我们提出了编码增益作为性能指标的措施。利用所提出的编码增益测度，通过计算机搜索得到每次传输的最优空时网格码。仿真结果表明，混合ARQ方案的最佳空时格码的每一个传输组成优于混合ARQ方案的所有传输相同的空时格码组成。
We consider a hybrid automatic repeat-request (ARQ) scheme employing different space-time trellis codes. In general, most design criteria for space-time trellis codes focus on minimizing the maximum pairwise error probability. However, in slow fading channels, since the maximum pairwise error probability differs little from other pairwise error probabilities, proper design techniques have to consider some pairwise error probabilities. We propose the measure of coding gain as performance measure. By using the proposed measure of coding gain, the optimal space-time trellis codes for each transmission are obtained through computer search. Simulation results show that hybrid-ARQ scheme consisting of the optimal space-time trellis codes for each transmission outperforms the hybrid-ARQ scheme consisting of the same space-time trellis codes for all transmission.