A quasi-orthogonal group space-time architecture for higher diversity gains
A quasi-orthogonal group space-time architecture for higher diversity gains
复制标题
用于更高分集增益的准正交群时空架构
DOI：
10.1109/glocom.2004.1378890
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
K. Letaief
中科院分区：
文献类型：
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作者：
L. Dai;S. Sfar;K. Letaief
多输入多输出（MIMO）系统可以提供两种增益：分集增益和复用增益。大多数现有的MIMO方案，包括空时编码和分层空时，旨在最大化它们中的任何一个。因此，期望设计一种方案以在复用增益和分集增益之间获得更好的折衷。提出了一种新的准正交群空时（QOGST）结构。在QOGST中，传输流被分成若干组，并且所有组经由组间空时块编码器进行编码。接收端采用群干扰抑制技术。性能评估方面的对称能量和它示出相比，组分层空时（GLST）架构，建议QOGST可以实现更高的对称能量和更好的分集复用权衡。仿真结果验证了我们的分析，并表明，QOGST可以实现至少3 dB的增益比GLST在FER为10/sup-3/，例如。
Multiple-input multiple-output (MIMO) systems can provide two kinds of gain: diversity gain and multiplexing gain. Most existing MIMO schemes, including space-time coding and layered space-time, aim at maximizing either of them. Therefore, it is desirable to design a scheme to get a better tradeoff between the multiplexing gain and diversity gain. In this paper, a novel quasi-orthogonal group space-time (QOGST) architecture is proposed. In QOGST, the transmit stream is divided into several groups and all the groups are encoded via an inter-group space-time block encoder. Group interference suppression is adopted at the receiver. Performance is evaluated in terms of symmetric energy and it is shown that compared to the group layered space-time (GLST) architecture, the proposed QOGST can achieve a higher symmetric energy and a better diversity-multiplexing tradeoff. Simulation results validate our analysis and show that QOGST can achieve at least 3 dB gain over GLST at a FER of 10/sup -3/, for instance.