卫星随机接入信道中的争用解决与信道估计

Lei Xiao, L. Cottatellucci
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引用次数: 5

摘要

研究了通用频率复用的多波束卫星系统随机接入信道问题。我们利用卫星上多天线的空间分集和强指向性来解决争用和进行信道估计。我们提出了两种检测有源卫星终端(ST)并估计部分或全部碰撞ST的信道系数的方法:网格缩减(GR)和连续信道抵消(SCC)算法。通过数值结果对所提方法的性能进行了评价,并与传统卫星RACH系统进行了比较。两种方法都优于传统的带Slotted-ALOHA的RACH, SCC算法的性能优于GR方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Contention resolution and channel estimation in satellite random access channels
We consider the random access channel (RACH) of a multi-beam satellite system with universal frequency reuse. We benefit from the spatial diversity and the strong directivity of multiple antennas at the satellite to resolve contentions and perform channel estimation. We propose two approaches to detect active satellite terminals (ST) and estimate the channel coefficients of some or all the colliding STs: Grid Reduction (GR) and Successive Channel Cancelation (SCC) algorithm. The performance of the proposed approaches is assessed by numerical results and compared with the conventional satellite RACH system. Both approaches outperform the conventional RACH with Slotted-ALOHA and SCC algorithm shows better performance than GR approach.
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