基于新体制GNSS信号的模糊抑制捕获研究

项目名称： 基于新体制GNSS信号的模糊抑制捕获研究

项目编号： No.61501309

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 刘芳

作者单位： 沈阳理工大学

项目金额： 20万元

中文摘要： 随着GNSS的不断发展，为提高系统的抗干扰、可扩展和可用性，出现了基于长周期伪码的BOC族调制、TDDM调制等新体制信号。正是由于新体制技术的应用，引发了以捕获为核心的接收技术新问题，尤其是捕获处理中主峰相位模糊、严重漏捕和错捕模糊等问题。为此，新体制GNSS信号的捕获新技术成为了研究的关键所在。本项目应对捕获的系列模糊问题，考虑现有方法在处理速度、处理精度、处理复杂度、适应性等方面存在的局限和不足，通过相关拟合方程建立、优化相关函数建立、自适应门限设置、通用单峰函数建立、相关影响因子矩阵构建、相关优先级动态匹配等核心应对机制，提出模糊抑制捕获算法。从而为GNSS的新发展和新应用提供理论支撑和技术基础。

中文关键词： 卫星导航；接收机；新体制信号；模糊抑制；捕获

英文摘要： With the development of GNSS, the BOC familly modulation and the TDDM modulation signals emerged in order to satisfy the anti-jamming, expansibility and usability of GNSS system. The new problems of acquisition technology were caused by the application of the new mechanism technologies, especially, the main peak ambiguity problem, the serious leakage acquisition and wrong acquisition ambiguity problems. Therefore, the research of new mechanism GNSS signal acquisition has been the new focus. Considering the deficiencies and limitations of existing acquisition algorithms in speed, precision, complexity and adaptability, the ambiguity suppression acquisition technologies will be research to overcome above problems. The ambiguity suppression acquisition algorithms including the key technology of correlation fitting function establishment, optimization correlation function establishment, adaptive threshold, general single peak establishment, impact factor matrix structure, relative priority dynamic matching, etc. will be established. The research will provide the theoretical support and technical foundation to the new development and application of GNSS system.

英文关键词： Satellite Navigation; Receiver;New Mechanism Signals;Ambiguity Suppression;Acquisition