混合干扰抵消技术在导航接收机中的应用  

Hybrid Interference Canceller Applied to Navigation Receiver

作　　者：刘楠[1] 陈爱军[1] 

机构地区：[1]东北林业大学机电工程学院,黑龙江哈尔滨150040

出　　处：《无线电工程》2010年第9期29-31,共3页Radio Engineering

摘　　要：在扩频体制的无线电导航系统中,接收机同时会收到多个导航台发射的地波和天波信号,这样接收点同时存在天波干扰和远近效应问题。提出基于天地波识别的远近效应判定算法和混合干扰抵消方法,在捕获结果都为地波的前提下,判断是否存在远近效应,利用串行干扰抵消跟踪获得较准确的初始数据估计,在此基础上用并行干扰抵消使信息数据更加精确。分析了干扰的因素,建立了实现原理框图,从而得出系统性能。仿真结果表明,利用改进的干扰抵消技术不仅可以提高系统的识别能力,还可以提高对于导航电文的接收性能。In spread spectrum radio navigation system, the receiver can receive ground-wave and sky-wave from different transmitters. There are both sky-wave interference and near-far effect in receiver. Near-far effect algorithm and hybrid interference canceller is proposed for capturing ground-wave and estimating near-far effect. And more accurate initial data estimation can be obtained with seJial interference cancellation section. And the parallel cancellation section improves the accuracy of data estimation. The implementation scheme is presented, and analysis of the system performance is given. Simulations show that the method can improve the discernment and performance of telegraphs.

关 键 词：无线电导航系统 天波干扰 远近效应 混合干扰抵消 

分 类 号：TN911[电子电信—通信与信息系统]