铁路通信网络中抗乘性干扰技术的研究

Research on the Anti-multiplicative Interference Technology in Railway Communication Network

在城市周围由于高强度多径效应影响,铁路网络信号会受到乘性噪声干扰而造成衰减,传统抗干扰方法容易引起通信信号波动而无法保证铁路通信网络的通信精度。提出了一种基于修正补偿思维的铁路通信网络抗乘性干扰技术,通过引入铁路通信网络信号的波普宽度、后验密度等数据对其进行粒子滤波处理,获取铁路通信信号在传递过程中的衰减程度,并以此作为补偿依据,然后根据乘性噪声与信号接收装置间的距离对载波相位和祖玛波普频率误差进行修正,从而实现了铁路通信网络的增强通信。实验结果表明,提出的方法能够极大提高铁路通信网络通信探测精度,有效地提高乘性噪声信号干扰下铁路网络通信的准确性。

Around the city by the multipath effect, high strength rail network signal caused by multiplicative noise attenuation, anti-interference methods are likely to lead to communication signal fluctuations to ensure the accuracy of the railway communication network communication. Is put forward based on the markov multiplicative interference of railway communication network technology, the acquisition of communication network signal particle filter processing, to obtain the degradation degree and in the process of railway signal in transmission to compensate, strengthen the communication of railway communication network is realized. Experimental results show that the proposed method can greatly improve the prospecting precision to the railway communication network communication effective improve the multiplicative noise signal interference under the accuracy of the railway network communication.