Femtocell网络中基于联合传输的分簇与功率分配算法*

针对家庭基站(femtocell)密集部署时的下行干扰问题，提出一种基于多点协作联合传输的分簇与功率分配相结合的算法。首先根据受到的干扰程度进行分簇，将干扰强的家庭基站分到同一个簇，簇内所有家庭基站通过寻找对自身最有利的基站进行协作，将干扰信号转变有用信号，联合传输为用户提供服务，提升用户的信干噪比来保证用户性能，簇间则复用相同的频谱资源。然后通过给用户分配合适的功率使得总传输速率最大。仿真结果表示，所提算法能在抑制系统干扰的同时提高系统的吞吐量。

Joint transmission-based clustering and power allocation algorithm in femtocell networks

For femtocell downlink interference problem in the case of dense deployment of femtocell, this paper propose an algorithm combining dynamic clustering algorithm based on multi-point cooperative (CoMP) joint transmission and power allocation algorithm. According to the degree of interference, the cells are divided into several clusters, and the cells with bigger interference are divided in the same cluster. All base stations in a cluster by finding the femtocell that is most beneficial to them for joint transmission, to converting interference signals into useful signals, joint transmission to provides users with services, which can guarantee the performance of users by increasing the signal-to-noise ratio of users, and the same frequency resources are used among clusters. then, The maximum transmission rate is achieved by allocating the appropriate power to the user. Simulation results show that the proposed algorithm can further improving the throughput of the system while suppressing the interference of the system.