一种卫星多波束中的波束选择构架及实现方法

摘要

为了以少量卫星载荷设备在广阔的服务区内提供高增益的通信链路,针对多波束通信卫星提出了一种星上收发波束选择的载荷构架及其实现方法.载荷构架分为波束分组与选择模块,实现方法则利用了收发无源设备的频率响应.通过控制前后端有源设备的混频本振,使上行接收波束和下行发射波束能够工作于多波束天线覆盖区内的任意位置.通过波束指向轮循,以低于波束数量的转发器实现了卫星在广大覆盖区内的高增益通信.分析结果表明,相比同样波束规模的多波束卫星,采用所提载荷架构的多波束卫星能够大幅降低载荷重量、功耗及热耗,提高转发器使用效率;相比同样承载规模的多波束卫星,能够大幅提高每个波束的传输性能及整星的吞吐量.%An onboard beam-selecting framework and corresponding implementation method for multi-beam satellite communication is proposed to provide high gain links for widely distributed users with small quantity of payloads. The framework is composed of beam grouping module and beam selecting module. During the process of implementation,the frequency response of multi-filter is used. For both uplink and downlink,by controlling the output of local oscillators,each beam can supply service to users located in any spot area . By periodically altering the direction of each beam,the high gain communication links in wide area can be supplied by small number of transponders. By comparison with the satellite configuring the same number of beams,analysis shows that the proposed framework can reduce the power consumption and the weight of payload substantially. By comparison with the satellite configuring the same payload weight and power consumption,the result shows that the proposed framework can increase the transmission per-formance of each beams and the throughput of satellite essentially.