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同频同时全双工(FD)通信由于其理论上可以提高一倍的频谱效率而获得了广泛关注。但是在全双工蜂窝网中,严重的小区间干扰极大地影响了系统性能。为了缓解严重的干扰,提高系统频谱效率,该文提出了一种部分全双工资源分配方案。该方案将时频资源划分为全双工资源块和半双工资源块,然后根据所服务用户的信道信息对时频资源进行分配,针对Wyner一维系统模型,将用户按其所处位置进行划分和资源分配,推导了不同划分门限下系统的频谱效率,得到了最优划分距离。仿真结果表明:相比完全全双工和完全半双工通信,部分全双工能够有效提高系统的频谱效率。
Co-frequency simultaneous full duplex (FD) communication has received widespread attention due to its theoretically doubled spectral efficiency. However, in full-duplex cellular networks, severe inter-cell interference greatly affects system performance. In order to mitigate the serious interference and improve the system spectral efficiency, a partial full-duplex resource allocation scheme is proposed. The scheme divides time-frequency resources into full-duplex resource blocks and half-duplex resource blocks, and then allocates time-frequency resources according to channel information of served users. According to the Wyner one-dimensional system model, users are located according to their locations Division and resource allocation, the spectral efficiency of the system under different division thresholds is deduced, and the optimal division distance is obtained. The simulation results show that partial full-duplex can effectively improve the system spectral efficiency compared with full-duplex and full-half-duplex communication.