This paper examines the uplink transmission of a single-antenna handsheld user to a cluster of satellites, with a focus on utilizing the inter-satellite links to enable cooperative signal detection. Two cases are studied: one with full CSI and the other with partial CSI between satellites. The two cases are compared in terms of capacity, overhead, and bit error rate. Additionally, the impact of channel estimation error is analyzed in both designs, and robust detection techniques are proposed to handle channel uncertainty up to a certain level. The performance of each case is demonstrated, and a comparison is made with conventional satellite communication schemes where only one satellite can connect to a user. The results of our study reveal that the proposed constellation with a total of 3168 satellites in orbit can enable a capacity of 800 Mbits/sec through cooperation of $12$ satellites with and occupied bandwidth of 500 MHz. In contrast, conventional satellite communication approaches with the same system parameters yield a significantly lower capacity of less than 150 Mbits/sec for the nearest satellite.

翻译：本文研究了单天线手持用户向卫星集群的上行传输，重点探讨如何利用星间链路实现协同信号检测。主要分析两种情形：卫星间具有完全信道状态信息（CSI）与部分CSI。从容量、开销和误码率三个维度对两者进行比较。此外，在两种设计方案中均评估了信道估计误差的影响，并提出了鲁棒检测技术以处理一定程度的信道不确定性。论文展示了各案例的性能表现，并与传统仅单星可连接用户的卫星通信方案进行对比。研究结果表明：在由3168颗卫星组成的星座中，通过12颗卫星协同传输并占用500 MHz带宽，可实现800 Mbits/sec的容量；而采用相同系统参数的传统卫星通信方法，其最近卫星的容量显著降低至不足150 Mbits/sec。