Cooperative relaying scheme with space time code for multihop communications among single antenna terminals
Cooperative relaying scheme with space time code for multihop communications among single antenna terminals
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DOI：
10.1109/glocom.2004.1379072
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发表时间：
2004-11
期刊：
影响因子：
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通讯作者：
T. Miyano;H. Murata;K. Araki
中科院分区：
文献类型：
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作者：
T. Miyano;H. Murata;K. Araki
在移动多跳通信中，分集技术很重要，因为移动终端之间的信道可能受到衰落的影响，并且终端之间的路由通常通过几跳来创建。采用多个发射天线的空时编码是对抗衰落的一种有效方法。对于只有一个天线的终端，由于尺寸/成本的限制，用户协作作为一种分集技术被引入。为了在不扩展带宽的情况下抵抗单天线终端间的衰落影响，提出了一种适用于多跳通信场景的空时编码协作中继方案。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都得到了发展。计算机仿真结果表明，随着跳数的增加，该方案可以获得分集增益，并进一步提高误帧率。此外，还显示了纠错码和同信道干扰的影响。
In mobile multihop communications, the diversity technique is important since the channel between mobile terminals may suffer from the effects of fading and the routes between terminals are normally created through several hops. Space-time coding using multiple transmit antennas is an effective countermeasure for fading. For terminals which have only one antenna, due to the size/cost limitations, user cooperation has been introduced as a diversity technique. In this paper, a space-time coded cooperative relaying scheme for a multihop communications scenario, in cases where the number of hops is more than two, is proposed in order to combat the effects of fading among single antenna terminals, without bandwidth expansion. The scheme utilizes a space-time code for cooperative relaying and is developed in both frequency-flat and frequency-selective fading channels. By computer simulations, it is shown that the proposed scheme provides diversity gain and more improvement of frame error rate as the number of hops increases. Furthermore, the effects of an error correcting code and co-channel interference are shown.