Ka频段维纳雨衰预测模型与补偿系统  

Wiener rain attenuation prediction and compensation model based on Ka band

作　　者：王艳岭[1] 达新宇[1] 

机构地区：[1]空军工程大学电讯学院,西安710077

出　　处：《计算机工程与应用》2011年第22期93-95,共3页Computer Engineering and Applications

基　　金：陕西省自然科学基金项目(No.2009JM8001-3)

摘　　要：为了降低Ka频段雨衰的影响,基于维纳预测思想建立了一种维纳雨衰预测模型,该模型通过预测某一频率点的雨衰值来控制多进制正交幅度调制(MQAM)的阶数M和发射功率,从而降低雨衰的影响。通过和DAH雨衰预测模型的仿真比较,结果表明,当频率大于21GHz时,维纳雨衰控制模型能比较精确地预测各个频率点的雨衰值,其最大误差小于0.2dB。相比于DAH预测模型,维纳雨衰控制模型大大简化了计算量,提高了计算效率。In order to reduce rain attenuation in Ka band,a Wiener rain attenuation prediction model is established which is based on the theory of Wiener prediction.This model is based on the rain attenuation of one frequency to reduce the effect of the rain attenuation by controlled the the M of MQAM modulation and the transmission power.Compared with the DAH rain attenuation the simulation results show that the Wiener rain attenuation prediction model has good performance as well as DAH rain attenuation prediction model when the frequency is more than 21 GHz,and the maximal error is less than 0.2 dB.Compared with the DAH model,the Wiener rain attenuation prediction model greatly refines the algorithm,and improves the algorithm efficiency.

关 键 词：KA频段 维纳预测 雨衰 DAH模型 

分 类 号：TN927.2[电子电信—通信与信息系统]