Optimal low-complexity self-interference cancellation for full-duplex MIMO small cells
Optimal low-complexity self-interference cancellation for full-duplex MIMO small cells
复制标题
全双工 MIMO 小型基站的最佳低复杂度自干扰消除
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
M. Kountouris
中科院分区：
文献类型：
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作者：
Italo Atzeni;Marco Maso;M. Kountouris
自干扰（SI）如果不被适当地消除，则会显著地限制全双工（FD）无线电设备的性能。接收链处的现有技术SI消除（SIC）技术隐式地设置设备的发射功率的上限。本文从这一观察出发，提出了一种FD多天线无线电的发射波束成形设计：i）利用接收机的固有SIC功能和信道状态信息; ii）利用多天线在空间SIC方面的潜力。所提出的解决方案不仅最大化吞吐量，同时符合FD器件的SIC要求，而且还具有非常低的复杂性，使其在处理时间和功耗要求方面优于最先进的同行。数值结果表明，我们的发射波束成形设计实现了显着的增益相对于应用迫零SI信道时，发射天线的数量是小到中等，这使得它特别吸引人的FD小小区基站。
Self-interference (SI) significantly limits the performance of full-duplex (FD) radio devices if not properly cancelled. State-of-the-art SI cancellation (SIC) techniques at the receive chain implicitly set an upper bound on the transmit power of the device. This paper starts from this observation and proposes a transmit beamforming design for FD multiple-antenna radios that: i) leverages the inherent SIC capabilities at the receiver and the channel state information; and ii) exploits the potential of multiple antennas in terms of spatial SIC. The proposed solution not only maximizes the throughput while complying with the SIC requirements of the FD device, but also enjoys a very low complexity that allows it to outperform state-of-the-art counterparts in terms of processing time and power requirements. Numerical results show that our transmit beamforming design achieves significant gains with respect to applying zero-forcing to the SI channel when the number of transmit antennas is small to moderate, which makes it particularly appealing for FD small-cell base stations.