Distributed Space-Time Block Coding for 3 and 4 Relay Nodes: Imperfect Synchronisation and a Solution
Distributed Space-Time Block Coding for 3 and 4 Relay Nodes: Imperfect Synchronisation and a Solution
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DOI：
10.1109/pimrc.2007.4394369
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发表时间：
2007-12
期刊：
影响因子：
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通讯作者：
F. Zheng;A. Burr;S. Ólafsson
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文献类型：
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作者：
F. Zheng;A. Burr;S. Ólafsson
到目前为止，分布式空时分组码(STBC)的研究大多集中在两个中继节点的情况下，并假设中继节点在符号级别上是完全同步的。通过将空时分组码应用于3-或4-中继节点系统，本文表明，不完全同步会导致常规检测器的性能显著下降。为此，我们提出了一种新的基于并行干扰消除(PIC)原理的STBC检测方案。PIC检测器的计算复杂度适中，但在抑制不完全同步的影响方面非常有效。
Most research on distributed space time block coding (STBC) has so far focused on the case of 2 relay nodes and assumed that the relay nodes are perfectly synchronised at the symbol level. By applying STBC to 3- or 4-relay node systems, this paper shows that imperfect synchronisation causes significant performance degradation to the conventional detector. To this end, we propose a new STBC detection solution based on the principle of parallel interference cancellation (PIC). The PIC detector is moderate in computational complexity but is very effective in suppressing the impact of imperfect synchronisation.