同时同频全双工认知无线电与传统时分双工(TDD)或频分双工(FDD)认知无线电相比，频谱感知与数据传输同时同频进行，频谱效率与频谱感知可靠性均能得到提升。在传统认知无线电移动通信网中，不同的位置布局，将产生不同的传输损耗、信道相关性等信道随机特性，从而影响频谱感知可靠性及网络容量等性能。针对全双工认知无线电的位置优选机制，目前还没有文献报道。. 本项目将研究全双工模式下，认知无线电的位置优选与不同小区形式、不同业务模型之间的关系；探索全双工认知无线电的天线位置与自干扰消除能力的关系；研究与位置有关的频谱感知新算法；分析适合工程应用的天线及基站位置优化方法。揭示网络性能与对应频谱感知算法、天线位置、基站位置间的约束机制。. 该项目将促进同时同频全双工认知无线电技术的进步，对同时同频全双工认知无线电的普及与应用，具有理论与经济价值。

Compared with the traditional Time Division Duplex (TDD) and Frequency Division Duplex (FDD) cognitive radio, Co-time Co-frequency Full Duplex Cognitive Radio (CCFD-CR) gets better performance in frequecy efficiency and spectrum sensing reliability, since spectrum sensing and data transmission can be done in the same frequency and at the same time. In the traditional cognitive radio mobile communication network, location will impact the transmission loss, channel correlation, etc. And then it will further impact the performance of spectrum sensing reliability, network capacity, and so forth. There is no literature available on the optimal location in CCFD-CR.. This project focuses on following aspects in the CCFD-CR:. (1) Study the relationship between the optimal location and cell layout in different service type.. (2) Discover the relationship between the antenna location and the self-interference cancellation.. (3) Develop the location-based spectrum sensing scheme.. (4) Analyze the method suitable in the optimization of antenna and base station locations in engineering application.. (5) Provide the constraits among the network performance and the corresponding spectrum sensing scheme, antenna location, and base station location.. This project will promote the development of CCFD-CR, and is also of theoretical and economic value in the popularization and application of CCFD-CR.