Novel down link rain fade mitigation technique for Ka‐band multibeam systems

Abstract

SUMMARYRain fades at Ka-Band degrades the link quality and performance significantly. Several rain fade mitigation techniques for Ka-band satellite systems are being investigated to improve the channel capacity. Methods such as power control and adaptive waveform techniques have been proposed for use in the uplink as they are capable of straightforward implementation. A novel down link power control technique for multi-beam Ka-band system has been proposed in this paper. It is based on the use of multi-port amplifier, which is commonly used for dynamic power sharing of the beams depending upon the traffic. Payload architecture for multi-beam coverage using multi-port amplifiers has been designed for the proposed technique. The simulation results to compensate for the rain fade attenuation of one beam by sharing the unused power from other beams have been presented

Site Diversity Gain for Earth-to-Satellite Links Using Rain Intensity Measurement

“…Frequency bands, system objective and network geometry are the parameters that should be taken into account to choose a suitable technique to mitigate the propagation effects. [2][3][4][5][6].…”

Joint-source-channel coding scheme for scalable video-coding-based digital video broadcasting, second generation satellite broadcasting system

“…However, rain attenuation in a high-frequency band such as the Ka band is a major factor for lowering the link capacity in satellite broadcasting service. 9 Thus, there is an acute need to jointly allocate the resources between source coding and channel coding to overcome the distortion against error-prone environment. In this paper, we devise a new technology to dynamically manage the rain attenuation by adopting a jointsource-channel coding (JSCC) that can adaptively apply variable code rates for both source and channel coding.…”