摘要
针对高噪声严重影响罗兰-C接收机的信号处理过程中脉冲初相位识别的情况,分析了基于全相位谱分析(apFFT)的罗兰-C载波信号初相位识别原理,对罗兰-C接收信号在噪声背景下的初相位识别进行了蒙特卡洛仿真和数据分析,结果表明该方法在高噪声背景下无需降噪就能够较准确地识别出罗兰-C载波信号的初相位,并准确地识别出相位编码,可直接应用于现代增强型罗兰接收机。
The loran-C receiver may fail to identify phase code of the Loran-C pulse in strong noise environment. The identification prin- ciple of the Loran-C carrier signal initial phase based on all-phase Fast Fourier Transform （apFFT） spectrum analysis is analyzed on details. After studing on the method for Phase coding identification of Loran-C signal with strong noise based on apFFT, Monte Carlo simulation of the new phase measuring method is completed with MATLAB, quantitative analysis showing that the method based on apFFT can estimate the initial phase of carrier wave in strong noise environment without any steps for eliminating noise, identify Lhe phase code of the Loran C pulse properly, and it can be introduced to the modern eloran receivers.
出处
《舰船电子工程》
2012年第7期51-54,共4页
Ship Electronic Engineering
基金
国家自然科学基金项目(编号:No.61102167)资助
