频率估计的多段信号频谱融合法及应用基础

项目名称： 频率估计的多段信号频谱融合法及应用基础

项目编号： No.61271449

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 涂亚庆

作者单位： 中国人民解放军后勤工程学院

项目金额： 58万元

中文摘要： 针对信号持续时间短、邻近频率信号干扰严重、信噪比低等条件下的高精度频率估计问题，现有方法在精确性、普适性、实时性和抗干扰性方面普遍存在明显不足。项目提出频率估计的多段信号频谱融合法，包括多段信号频谱融合机理分析、多段同频、异频信号频谱融合法和基于多段信号频谱融合的频谱细化法。研究中，通过多段信号频谱融合机理分析、异频同频化处理、加权融合频谱矩阵降维、主瓣相关性分析和频谱融合细化等措施，提高频率估计精度，扩大适用范围，提升计算效率和增强频谱区分度。鉴于线性调频连续波雷达测距对频率估计精度要求高、工程应用背景广泛和研究难度较高的典型示例作用，将多段信号频谱融合法应用于此进行应用验证。项目研究目的是通过增强频谱融合度，提高在信号持续时间短、邻近频率信号干扰严重、信噪比低等条件下的频率估计精确性，改善其普适性、实时性和抗干扰性，解决当前雷达等领域中有关频率估计的关键技术问题。

中文关键词： 信号处理；频率估计；多段信号；频谱融合；线性调频连续波雷达测距

英文摘要： Under condition of short duration of measured frequency signal, severe interfering signals at nearby frequency, low SNR and so on, the higher accurate frequency estimation is needed. While the existing methods are general deficient in accuracy, universality, real-time performance and anti-jamming capability, the multi-sections signal spectra fusion method of frequency estimation is proposed which is including multi-sections signal spectra fusion mechanism analysis, multi-sections co-frequency signal spectra fusion method, multi-sections different frequency signal spectra fusion method and multi-sections signal spectra fusion based spectrum zoom method. In reaserch, multi-sections signal spectra fusion mechanism analysis, different frequency normalization, weighted fusion spectra matrix dimensions reduction, main-lode spectra correlation analysis, spectra fusion zoom and so on will be adopted to improve the frequency estimation accuracy, enlarge the using area, advance the computational efficiency and enhance spectral discrimination.?In view of high accurate frequency estimation requirement, abroad project background, considerable difficulty and typical illustration effect of Linear Frequency Modulation Continuous Wave (LFMCW) radar ranging problem, multi-sections signal spectra fusion method will be applied to i

英文关键词： signal processing；frequency estimation；multi-sections signals；spectra fusion；Linear Frequency Modulation Continuous Wave