一种星地联合Ka频段上行雨衰补偿方法

The Invention Relates to A Compensating Method for Uplink Rain Attenuation in Ka-Band Combined with Satellite and Earth

Ka频段在通信、测控领域的使用越来越多,具有抗干扰、数据传输通量大、频率范围广等优点,但是Ka频段电磁波信号在通过不同恶劣天气时会受到不同程度的影响,其中降雨对Ka频段电磁波信号传播的影响最大。根据ITU雨衰模型和下行信号幅度变化可以对上行信号发射功率进行开环控制,此方式不确定因素较多,容易出现问题,本文提出一种使用卫星接收AGC电平控制上行发射功率的星地联合闭环控制方法,可使星地通信、测控链路工作在最佳状态。

Ka-band is used more and more in the field of communication,measurement and control,and has the advantages of anti-interference,large data transmission flux,wide frequency range,etc.However,electro-magnetic waves in Ka-band will be affected to different degrees when passing through different inclement weather,among which rainfall has the greatest influence on the propagation of electromagnetic signals in Kaband.According to the ITU rain attenuation model and the downlink signal amplitude changes the uplink signal transmitted power can be open loop control,uncertainty is more,this way is easy to appear problem,this paper proposes a use satellite AGC uplink transmission power level control of the star to earth the closed loop control method,can make the star communication,measurement and control link work in the best state.