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提出了一种新的中继卫星前向SMA(S频段多址)系统前向链路中多波束形成方法,即在地面采用数字移相代替中继星星上模拟移相完成波束形成;指出了需要解决的关键技术问题和解决方法,通过“星(用户星)-星(中继星)-地”无线联试,验证了地面数字移相的正确性,对简化中继星上设备、实现前向链路同时多目标能力具有积极意义。
A new multi-beamforming method in the forward link of SMA (S-band multiple access) system is proposed, that is, a digital phase-shifting method is used to simulate the phase-shifting on the satellite to complete the beamforming on the ground. To solve the key technical problems and solutions, the correctness of the terrestrial digital phase-shifting is verified through the “Star (user-star) - star (relay star) - ground” , To achieve forward-link multi-objective capability at the same time has a positive meaning.