A novel approach for characterization of multibeam communication payloads,International Journal of Satellite Communications and Networking

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A novel approach for characterization of multibeam communication payloads
International Journal of Satellite Communications and Networking ( IF 0.9 ) Pub Date : 2022-07-05 , DOI: 10.1002/sat.1452
Jatin Trivedi ₁ , Siddhant Joshi ₁ , Rakesh Vyas ₁

Affiliation

Communication payload architecture has changed from a conventional single broad beam to a large number of spot beam forms to meet the ever-increasing data rate demand. Owing to the large telecommunication requirements of the user, current generation satellites are equipped with a large number of transponders/beams. Due to the increased number of payload beams, performance evaluation and validation time increases during all stages of the satellite integration process. Also, satellite testing in thermal–vacuum (TVAC) conditions is hugely cost-intensive. Under such circumstances, the conventional test setup established for multibeam payload characterization presents limitations and increases overall measurement time. The paper proposes a novel switch matrix (SWM) based architecture for integrated multibeam payload characterization at payload input and output to significantly reduce effective uplink and downlink transmission line chains required for RF characterization without compromising overall measurement accuracy. We have developed a Telecommand and Telemetry (TCTM) simulator system for closed-loop automated switching of switches in SWM to reduce human intervention and ensure safety aspects of payload. We present the SWM approach for two classes of high throughput satellites (HTS), namely, symmetrical and asymmetrical architectures. The results show that the proposed approach is robust and advantageous in overall RF performance, reduction in the number of interfaces, electromagnetic interference and electromagnetic susceptibility (EMI/EMC) considerations, electrical integrity, and ground test setup complexity compared with conventional characterization philosophy.

中文翻译：

一种表征多波束通信有效载荷的新方法

通信有效载荷架构已从传统的单一宽波束转变为大量点波束形式，以满足不断增长的数据速率需求。由于用户的大量电信需求，当前一代的卫星配备了大量的转发器/波束。由于有效载荷波束数量的增加，卫星集成过程的所有阶段的性能评估和验证时间都会增加。此外，热真空 (TVAC) 条件下的卫星测试成本非常高。在这种情况下，为多波束有效载荷表征而建立的传统测试设置存在局限性并增加了整体测量时间。本文提出了一种基于开关矩阵 (SWM) 的新型架构，用于在有效载荷输入和输出处进行集成多波束有效载荷表征，以显着减少 RF 表征所需的有效上行链路和下行链路传输线链，而不会影响整体测量精度。我们开发了一个远程命令和遥测 (TCTM) 模拟器系统，用于 SWM 中开关的闭环自动切换，以减少人为干预并确保有效载荷的安全方面。我们提出了两类高吞吐量卫星（HTS）的 SWM 方法，即对称和非对称架构。结果表明，所提出的方法在整体射频性能、减少接口数量、电磁干扰和电磁敏感性 (EMI/EMC) 考虑方面稳健且具有优势，

更新日期：2022-07-05

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