Design and Analysis of FD MIMO Cellular Systems in Coexistence With MIMO Radar
Design and Analysis of FD MIMO Cellular Systems in Coexistence With MIMO Radar
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DOI：
10.1109/twc.2020.2986734
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发表时间：
2020-04
影响因子：
10.4
通讯作者：
S. Biswas;Keshav Singh;Omid Taghizadeh;T. Ratnarajah
中科院分区：
文献类型：
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作者：
S. Biswas;Keshav Singh;Omid Taghizadeh;T. Ratnarajah
频谱共享和全频谱共享是两种很有前途的技术，可以缓解严重的频谱紧张，这已经威胁到未来无线通信系统的发展。在本文中，我们考虑一个两层共存的框架，涉及一个并置多输入多输出（MIMO）雷达系统（RS）和一个全双工MIMO蜂窝系统（CS）。考虑到信道状态信息的不完整性和CS的硬件损伤，本文研究了一种频谱共享环境，在CS的发射功率和RS的检测概率（PoD）的约束下，通过最小化和均方误差来设计CS的$i）$预编码器，以提高蜂窝用户的服务质量（QoS），以及$ii）RS处的$预编码器，以减轻从RS到CS的干扰。虽然PoD和它的非中心性参数之间的单调增加的关系被利用来解决的PoD在对RS的干扰阈值方面，用于目标检测的广义似然比测试被用来获得检测器统计的预编码的雷达波形。数值结果表明，所提出的频谱共享算法的可行性，虽然在RS发射功率，PoD和蜂窝用户的QoS有一定的权衡。
Spectrum sharing and full duplexing are two promising technologies for alleviating the severe spectrum crunch that has threatened to blight the progress of future wireless communication systems. In this paper, we consider a two tier coexistence framework involving a collocated multiple-input-multiple-output (MIMO) radar system (RS) and a full-duplex MIMO cellular system (CS). Considering imperfect channel state information and hardware impairments at the CS, we focus on a spectrum sharing environment to improve the quality of service (QoS) for cellular users by designing $i)$ precoders at CS via the minimization of sum mean-squared-errors, subject to the constraints of transmit powers of the CS and probability of detection (PoD) of the RS, and $ii)$ precoders at the RS to mitigate the interference from RS towards CS. While the monotonically increasing relationship between PoD and its non-centrality parameter is exploited to resolve the PoD in terms of interference threshold towards the RS, a generalized likelihood ratio test for target detection is used to derive detector statistics of the precoded radar waveforms. Numerical results demonstrate the feasibility of the proposed spectrum sharing algorithms, albeit with certain tradeoffs in RS transmit power, PoD and QoS of cellular users.