Research on Distributed Beamforming Algorithm Based on Inter-satellite Link

The inter-satellite link load belongs to a system with limited power volume, and generally has low antenna gain and weak transmission capacity. Aimed at handling the problem that single-node inter-satellite link systems are often incapable of satisfying long-distance high-bandwidth communication requirements, the distributed beamforming algorithm is applied to the inter satellite design, in order to achieve higher inter-satellite link performance without increasing the inter-satellite link transmission power. This paper analyzes the feasibility and spatial beam pattern of distributed beamforming in inter-satellite links. The improved distributed beamforming algorithms that can be adapted to different channels change are proposed. In a flat stationary channel, the phase weight and correction factor are increased, when the random phase disturbance is 3°, the number of beam retransmissions is reduced by 800 times compared with the classical algorithm; In the time-varying channel, the feedback of the time-varying in-formation of the channel is increased, and the phase compensation is added to alleviate the influence of the dynamic change of the channel. Compared with the traditional algorithm, it can be adapted to the change of the time-varying channel.