Pair-aware transceive beamforming for non-regenerative multi-user two-way relaying
Pair-aware transceive beamforming for non-regenerative multi-user two-way relaying
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DOI：
10.1109/icassp.2010.5494901
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发表时间：
2010-03
期刊：
影响因子：
--
通讯作者：
A. Amah;A. Klein
中科院分区：
文献类型：
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作者：
A. Amah;A. Klein
在非再生双向中继中，两个通信节点同时向中继站（RS）发送数据。RS处理接收到的信号并将其同时转发到两个节点。为了获得其伙伴的信息，每个节点通过从其接收信号中减去其发送信号来执行自干扰消除。然而，在多用户双向中继中，每个节点处的干扰不仅是先验的自干扰，还包括来自其他双向对节点的干扰。使用迫零（ZF）波束成形，RS花费不必要的能量来消除可以由节点消除的干扰。因此，我们建议在RS处应用成对感知的双向波束成形（PATB）来仅消除其他对干扰，并且让每个节点消除其自干扰。提出了两种PATB方案，即配对感知（PA）匹配滤波器（PA-MF）和最大化最小信噪比的PA半定松弛（PA-SDR）。从总和率分析，PA-SDR优于PA-MF，两者都优于非PA ZF。
In non-regenerative two-way relaying, two communicating nodes transmit simultaneously to the Relay Station (RS). The RS processes the received signal and forwards it to both nodes simultaneously. In order to obtain its partner's information, each node performs self-interference cancellation by subtracting its transmitted signal from its received signal. However, in multi-user two-way relaying, the interference at each node is not only the a priori self-interference, but also the interference from the other two-way pairs' nodes. Using Zero Forcing (ZF) transceive beamforming, the RS spends unnecessary energy to cancel the interference that can be cancelled by the nodes. Therefore, we propose to apply pair-aware transceive beamforming (PATB) at the RS to cancel only the other-pair interference and let each node cancels its self-interference. Two PATB schemes are proposed, namely, pair-aware (PA) matched filter (PA-MF) and PA semidefinite relaxation of maximising the minimum signal to noise ratio (PA-SDR). From sum rate analysis, PA-SDR outperforms PA-MF, and both outperform non-PA ZF.