多波束卫星通信系统波束干扰下的资源分配策略研究

多波束卫星通信系统能够为移动用户提供全球范围的通信服务.然而,由于条件限制,星上资源利用率较低,并且星地距离较远,业务传输过程中存在较大时延.为了提高星上资源的利用率,本文在有波束干扰的多波束卫星通信系统中,针对有严格时延要求的卫星通信业务,提出了一种新的下行链路资源分配算法,增加了业务时延限制和最大干扰功率限制两种约...

Resource allocation strategy for multi-beam satellite communication system under inter-beam interference

Multi-beam satellite communication system can provide mobile users with global communication services.However,the on-board resource utilization is low due to the limited resources as well as the long distance between satellites and the earth,and the resulted time delay in service transmission.To address this,we propose a new downlink resource allocation algorithm for a multi-beam satellite communication system with beam interference,which is designed under two constraints of strict service delay and limited maximum interference power.Meanwhile,the influence of inter-beam interference on the system capacity is considered,and the Lagrange duality theory and sub-gradient descent method are used to obtain the optimal resource allocation strategy in order to maximize the service capacity of spot beam.The simulation results show that under the same noise power spectral density channel,the proposed algorithm meets the time delay requirement for each spot beam,has good fairness,improves the system in total transmission rate,and reduces the difference between the spot beam service demand and the allocated communication resources,therefore can provide maximized communication service to users;while under the condition of different noise power spectral densities,the proposed algorithm still maintains good fairness.