卫星通信系统的降雨衰方法研究

Satellite Communication System of Rain Failure Method Research

研究降雨天保证卫星通信高质量问题。卫星通信极易受云、雪、雾、雨等天气的影响,尤其是在下雨天气中卫星通信信号的衰落程度最大。传统的分集接收技术不能有效去除雨衰对通信信号的影响,造成卫星通信质量不高的问题。为了克服上述难题,提出了根据上行功率降雨衰的方法。通过检测卫星信号的强度,计算卫星通信链路上的雨衰大小,并根据雨衰值动态调整地面通信站中功率放大器的发射功率,达到对雨衰进行最大补偿,有效减小了雨衰对通信质量的影响。实验表明,改进方法能够有效避免降雨对通信信号的影响,最大限度地对雨衰进行了补偿,提高了卫星通信的质量,取得了满意的结果。

Research the problem of high quality satellite communications in rain days. Satellite communication is highly susceptible to cloud, snow, fog, rain and other weather conditions, and especially in rainy weather,＇ satellite communication signals fading may reach the maximum. The traditional diversity reception technique can not effective- ly remove the influence of rains, causing the satellite communication quality reduction. In order to overcome the a- bove problem, we put forward an uplink power reduce signal fading method. Through detection of satellite signal strength, the rain attenuation in satellite communication link was calculated, and according to the rain attenuation val- ues, ground communication station power was adjusted to achieve the maximum compensation for the rain attenuation and effectively reduce the influence of rain attenuation on the communication quality. Experiments show that the im- proved method can effectively improve the quality of satellite communications.