基于滑窗捕获的伪卫星系统抗远近效应方法研究  

Research on Anti-Far-Near Effect Method of Pseudolite System Based on Sliding Window Acquisition

作　　者：姚春波 李坤 赵峰 YAO Chunbo;LI Kun;ZHAO Feng(Shenzhen Huiyu System Co.,Ltd.,Shenzhen 518067,China)

机构地区：[1]深圳市慧宇系统有限公司,广东深圳518067

出　　处：《移动通信》2021年第6期95-98,124,共5页Mobile Communications

摘　　要：通过滑窗捕获方法来对抗伪卫星系统中的远近效应,在伪卫星基站发射端进行分时隙发送信号,同时在接收端通过滑窗的方式增加一维时域的捕获。实验结果表明,在远近效应较强的情况下,滑窗捕获相关峰均比值最大为32.38,大大超过了预先设定的门限10,而如果没有采用滑窗捕获,自相关峰均比无法超过门限。因此滑窗捕获能够基本上克服远近效应对伪卫星系统造成的影响。The sliding window acquisition method is used to combat the near-far effect in the pseudolite system. The transmitter of pseudolite base stations sends signals in time slots, and the receiver enhances the one-dimensional time domain acquisition through the sliding window method. The experimental results show that the correlation peak-to-average ratio of the sliding window acquisition is up to 32.38 under the strong near-far effect, which greatly exceeds the preset threshold 10, and the autocorrelation peak-to-average ratio cannot exceed the threshold without the sliding window acquisition. Therefore, the sliding window acquisition can basically overcome the influence of the near-far effect on the pseudolite system.

关 键 词：伪卫星 远近效应 滑窗捕获 

分 类 号：TN929.5[电子电信—通信与信息系统]