A New Transmission Protocol for Cooperative Communications
A New Transmission Protocol for Cooperative Communications
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DOI：
10.1109/icuwb.2015.7324407
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发表时间：
2015-11
期刊：
影响因子：
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通讯作者：
Hua-An Zhao
中科院分区：
文献类型：
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作者：
Hua-An Zhao
通过在不同用户之间共享资源形成虚拟天线阵列来实现分集是无线协作通信的一个研究热点。协作网络中存在着放大转发（AF）和解码转发（DF）等不同的资源利用策略。虽然这些策略的实现很简单，但它们对通道状态信息（CSI）的利用通常很差。本文在已有估计域约简策略的基础上，提出了一种新的估计域约简策略——CSI定向估计和正演（CDEF）。给出了利用最小均方误差（MMSE）和估计域可能的集约化对继电器信号进行最优估计的封闭解。我们将证明这种新策略比AF和DF具有更好的符号错误率（SER）和中断性能。
Cooperative wireless communication is a hot research area for attaining diversity through virtual antenna array that is formed by sharing resources among different users.Different strategies of resource utilization such as amplify-and-forward (AF) and decode-and-forward (DF) already exist in cooperative networks.Although the implementation of these strategies is simple, their utilization of the channel state information (CSI) is generally poor.In this paper a new strategy, based on the previously existing ones, called CSI directed estimate and forward (CDEF) with estimate domain reduction is proposed.A closed form solution for the optimal signal estimation at the relay using minimum mean square error (MMSE) as well as a possible set reduction of the estimation domain is given. We will show that this new strategy attains better symbol error rate (SER) and outage performance than AF and DF.