二进制偏移载波最小均方误差预滤波无模糊跟踪方法

任嘉伟 1; 贾维敏 2; 陈辉华 1; 姚敏立 1

doi:10.7652/xjtuxb201304021

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二进制偏移载波最小均方误差预滤波无模糊跟踪方法

更新时间：2025-07-09

- 二进制偏移载波最小均方误差预滤波无模糊跟踪方法
- A Pre-Filtering Method with Minimizing Mean Square Error Criterion for Unambiguous Tracking of Binary Offset Carrier Signals
- 西安交通大学学报 2013年47卷第4期页码：125-130
- 作者机构：
  
  第二炮兵工程大学403教研室,西安,710025
- 作者简介：
- 基金信息：
  
  : 2012-07-19。作者简介: 任嘉伟(1985—),男,博士生;姚敏立(通信作者),男,教授,博士生导师。基金项目: 国家自然科学基金资助项目(61179004,61179005)
- DOI：10.7652/xjtuxb201304021
  中图分类号： TP391.9
- 网络首发：2013-04-10，
  
  纸质出版：2013
- 稿件说明：
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任嘉伟 1, 贾维敏 2, 陈辉华 1, 等. 二进制偏移载波最小均方误差预滤波无模糊跟踪方法[J]. 西安交通大学学报, 2013,47(4):125-130.

A Pre-Filtering Method with Minimizing Mean Square Error Criterion for Unambiguous Tracking of Binary Offset Carrier Signals[J]. 2013, 47(4): 125-130.
任嘉伟 1, 贾维敏 2, 陈辉华 1, 等. 二进制偏移载波最小均方误差预滤波无模糊跟踪方法[J]. 西安交通大学学报, 2013,47(4):125-130. DOI： 10.7652/xjtuxb201304021.

A Pre-Filtering Method with Minimizing Mean Square Error Criterion for Unambiguous Tracking of Binary Offset Carrier Signals[J]. 2013, 47(4): 125-130. DOI： 10.7652/xjtuxb201304021.

摘要

针对全球导航卫星系统所使用的二进制偏移载波(BOC)调制信号存在跟踪模糊的问题

提出了一种最小均方误差预滤波(MMSES)无模糊跟踪方法。在分析预滤波代价函数的基础上

首先推导经过相关后的噪声功率项表达式

然后根据最小均方误差准则

以宽度较窄的三角形单峰无模糊相关函数为赋形目标

给出包含噪声项的滤波函数最优解

最后采用预滤波器结构设计出赋形相关器。仿真结果表明

MMSES无模糊跟踪方法能够适用于各种相位和阶数的BOC信号

得到主峰宽度为0.2×10

-6

s的单峰相关函数

且在处理高阶调制信号时的跟踪误差在载噪比为25～45 dB·Hz范围内

比BPSK-Like方法减少了50%以上

多径误差在延时为0～1.5×10

-6

s范围内比BPSK-Like方法减少0.8 m。

Abstract

A minimum mean square error criterion shaping(MMSES)method is proposed to solve the ambiguous tracking problem of binary offset carrier(BOC)modulated signals used in global navigation satellite systems. An expression of the noise-term after correlation is derived through the analysis of the pre-filtering cost function. Then

the minimum mean square error criterion is used to get the optimal solution of the filter function with noise-term by optimizing the objective curve that is an unambiguous correlation function with narrow triangular shape. Finally

the shaping correlator is designed by using the pre-filtering structure. Simulation results show that the MMSES unambiguous tracking method gets a correlated

function with single peak and 0.2×10

-6

s in width for BOC modulated signals of all kinds of phases and orders. When it is used to track high order BOC signal

the tracking error of the MMSES method is less over 50% than that of the BPSK-Like method in the carrier to noise ratio of 25-45 dB·Hz

and the multipath error of the MMSES method is 0.8 m smaller than that of the BPSK-Like method in the delay of 0-1.5×10

-6

关键词

Keywords

references

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