A study of frequency utilization efficiency of OFDMA adaptive coding and modulation on Ka-band satellite communications system [International Communications Satellite Systems Conference]

2019 ◽  
Author(s):  
M. Ohkawa ◽  
H. Wakana ◽  
A. Miura
Keyword(s):  
Satellite Communications ◽  
Utilization Efficiency ◽  
Ka Band ◽  
Adaptive Coding ◽  
Satellite Systems ◽  
Communications System

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

2014 ◽  
Vol 568-570 ◽  
pp. 1263-1267 ◽  
Author(s):  
Xiao Tian Zheng ◽  
Ji Lin Li ◽  
Xin Rong Wang
Keyword(s):  
High Speed ◽  
Satellite Communications ◽  
Rain Attenuation ◽  
Ka Band ◽  
Adaptive Coding ◽  
High Efficient ◽  
Link Budget ◽  
High Speed Data ◽  
Robust Adaptive ◽  
Speed Data Transmission

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.

Sign in / Sign up

Export Citation Format

Share Document