Space time coded cooperative relaying technique for multihop communications
Space time coded cooperative relaying technique for multihop communications
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DOI：
10.1109/vetecf.2004.1405080
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发表时间：
2004-09
期刊：
影响因子：
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通讯作者：
T. Miyano;Hidekazu Murata;Kiyomichi Araki
中科院分区：
文献类型：
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作者：
T. Miyano;Hidekazu Murata;Kiyomichi Araki
在多跳无线网络中，由于中继传输在衰落信道上，通信质量下降。利用多发射天线的空时编码是一种有效的抗衰落技术。对于由于尺寸/成本限制而仅具有一个天线的终端，已经引入了用户协作作为分集技术。针对单天线多跳通信中衰落信道的影响，提出了一种新的协作中继方案。该方案利用空时码进行协作中继，并在频率平坦和频率选择性衰落信道中开发，以利用空间和路径分集增益。计算机仿真结果表明，该方案可以实现几乎完全的空间分集的多跳通信中的非再生中继与SNR估计和再生中继与错误检测。
In multihop wireless networks, the quality of communications is degraded due to the relay transmissions over fading channels. Space-time code using multiple transmit antennas is an effective countermeasure for fading. For terminals which have only one antenna due to size/cost limitations, user cooperation has been introduced as a diversity technique. A new cooperative relaying scheme is proposed in order to combat the effects of fading in multihop communications among single antenna terminals. This scheme utilizes space-time code for cooperative relaying and is developed in both frequency-flat and frequency-selective fading channels for exploiting space and path diversity gain. By computer simulations, it is shown that the scheme can achieve almost full spatial diversity in multihop communications by both non-regenerative relaying with SNR estimation and regenerative relaying with error detection.