基于Turbo码的自适应Ka频段抗雨衰控制

Adaptive Rain Fade Control in Ka Band Based on Turbo Code

为了减小雨衰对Ka频段的影响,通过分析Ka频段雨衰和信号频率的关系以及Turbo码在不同天气下的性能,提出了一种自适应的抗雨衰控制方法,并建立了相应的系统模型。根据不同的天气状况自适应地提高码重和控制信号频率,提高了系统在中高信噪比时的抗雨衰能力。仿真结果表明,当误码率为10-4～10-5时,其性能可提高3 dB左右。

An adaptive rain fade control countermeasure approach and its system model are proposed to reduce rain attenuation in Ka band.The approach can improve system resisting rain loss ability by increasing code weight and controlling signal frequency adaptively according to different weather conditions.Simulation results show that the approach can provide 3dB gain in case of a BER of 10-4~10-5.