In this study, we investigate optimal receive combining methods that use additional ground antennas in a dual-contact satellite scenario in which a target satellite and an adjacent satellite simultaneously transmit their data to ground antennas at the same location. When the adjacent satellite is within the looking angle of the ground antenna of the target satellite, interference causes the performance of the target satellite to deteriorate significantly unless appropriate measures are taken. In this study, we first model the interference by employing the Jet Propulsion Laboratory peak envelope model, and then apply the interference to the received signal. Next, assuming the main antenna and an additional antenna are available at the ground station, appropriate receive combining methods such as equal-gain combining (EGC), maximal ratio combining (MRC), and optimum combining (OC) are utilized for interference mitigation. Although OC outperforms EGC and MRC, a combining method that also accounts for the channel condition, implementation complexity, and interference level was also selected. The results show that the performance gained using a receive combining method makes this an attractive approach in the presence of interference. It is, therefore, expected that interference mitigation by combining methods can be advantageously applied to various interference situations in low Earth orbit satellite links.

在这项研究中，我们研究了在双接触卫星场景中使用附加地面天线的最佳接收组合方法，其中目标卫星和相邻卫星同时将其数据传输到同一位置的地面天线。当相邻卫星在目标卫星地面天线的视角范围内时，如果不采取适当的措施，干扰会使目标卫星的性能显着恶化。在本研究中，我们首先采用喷气推进实验室峰值包络模型对干扰进行建模，然后将干扰应用于接收信号。接下来，假设地面站有主天线和附加天线可用，适当的接收合并方法，例如等增益合并（EGC），最大比率合并 (MRC) 和最佳合并 (OC) 用于干扰减轻。尽管 OC 优于 EGC 和 MRC，但也选择了一种同时考虑了信道条件、实现复杂性和干扰水平的组合方法。结果表明，使用接收组合方法获得的性能使其成为存在干扰的一种有吸引力的方法。因此，预计通过组合方法减轻干扰可以有利地应用于低地球轨道卫星链路中的各种干扰情况。结果表明，使用接收组合方法获得的性能使其成为存在干扰的一种有吸引力的方法。因此，预计通过组合方法减轻干扰可以有利地应用于低地球轨道卫星链路中的各种干扰情况。结果表明，使用接收组合方法获得的性能使其成为存在干扰的一种有吸引力的方法。因此，预计通过组合方法减轻干扰可以有利地应用于低地球轨道卫星链路中的各种干扰情况。