Coexistence of radar and communication systems in CBRS bands through downlink power control
Coexistence of radar and communication systems in CBRS bands through downlink power control
复制标题
通过下行链路功率控制实现雷达和通信系统在 CBRS 频段的共存
DOI：
10.1109/milcom.2017.8170782
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
S. Kompella
中科院分区：
文献类型：
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作者：
N. Krishnan;Ratnesh Kumbhkar;N. Mandayam;I. Seskar;S. Kompella
公民宽带无线电服务频带（3550-3700 GHz）被视为能够提高无线宽带和蜂窝系统性能的关键频带之一。需要仔细研究蜂窝通信次系统与现役海军雷达共存时所产生的干扰，以建立实用的保护距离，既保护现役雷达免受有害干扰，又能增加共存次系统的频谱接入机会。在此背景下，本文研究了舰载海军雷达与广域蜂窝通信系统的同频和邻频共存问题，分析了不同雷达保护距离下蜂窝系统下行传输对海军雷达的干扰。这种分析的结果表明，保持距离雷达30 km的保护距离将确保雷达接收机所需的INR保护标准为−6 dB，概率> 0.9，即使二次网络与雷达在同一信道上运行。还提出了将操作功率分配给共存的蜂窝设备的新颖的功率控制算法，以进一步减小与雷达的保护距离，同时仍然满足雷达INR保护要求。
Citizen Broadband Radio Service band (3550–3700 GHz) is seen as one of the key frequency bands to enable improvements in the performance of wireless broadband and cellular systems. A careful study of interference caused by a secondary cellular communication system coexisting with an incumbent naval radar is required to establish a pragmatic protection distance, which not only protects the incumbent from harmful interference but also can increase spectrum access opportunity for the coexisting secondary system. In this context, this paper investigates the co-channel and adjacent channel coexistence of a ship-borne naval radar with a wide-area cellular communication system and presents the analysis of interference caused by downlink transmissions of the cellular system on the naval radar for different values of radar protection distance. The results of such analysis suggest that maintaining a protection distance of 30 km from the radar will ensure the required INR protection criterion of −6 dB at the radar receiver with > 0.9 probability, even when the secondary network operates on the same channel as the radar. Novel power control algorithms to assign operating powers to the coexisting cellular devices are also proposed to further reduce the protection distance from radar while still meeting the radar INR protection requirement.