A High Efficient and Robust Adaptive Coding and Modulation Algorithm for Ka Band Satellite Communications

Abstract

The Ka band for satellite communications is allocated from 27GHz to 40GHz and it is possible to realize the high speed data transmission in this 13GHz bandwidth. However, the attenuation especially the rain attenuation is tremendous for the Ka band. And we need to reserve about 4~8dB link budget to guarantee the typical link reliability 99.9% for the constant coding and modulation (CCM). In this paper, we propose a adaptive coding and modulation (ACM) algorithm that can dynamically change the modulation and code efficiency according to link condition. Based on this algorithm we only need reserve about 1dB to realize the 99.7% reliability. The simulation results show that we can derive more than triple throughout compare to CCM.

Multi-domain united link adaptation technique in high-throughput satellite communication system

“…The modcod adjustment refers to the Hub controlling the terminal to use a lower modcod burst under the decline of the link quality. If the link conditions improve, the terminal will adjust to a higher modcod [3].Carrier rate adjustment refers to the fact that when the link quality becomes worse. The Hub…”