基于软件无线电的气象传真接收系统优化设计  

Optimization Design of Meteorological Facsimile Receiver Based on Software Radio

作　　者：易中立[1] 刘永刚 李文婷 

机构地区：[1]交通运输部规划研究院,北京100028 [2]中交水运规划设计院有限公司,北京100007 [3]大连海事大学,辽宁大连116026

出　　处：《中国航海》2017年第3期1-3,24,共4页Navigation of China

摘　　要：为有效解决模拟解调气象传真接收机的精度和灵敏度低、抗干扰能力差等问题,提出基于软件无线电的气象传真接收系统优化方案。该系统采用J型场效应管、ESD保护电路和滤波电路等构建水准匹配的电小有源天线;采用超外差接收机技术、电调谐滤波器技术、数字解调技术、FFT同步算法、Rife频偏估计算法及基于DSTFT的FSK算法构建气象传真接收机信息接收和处理单元,实现气象传真信号的接收、数字解调、处理和显示。试验结果表明:该系统能完成气象传真信号的解调和气象传真图的恢复,图像质量和视觉效果均得到很大改善。In order to effectively solve the problems of low precision, low sensitivity and poor anti-interference ability of common analog meteorological facsimile receiver, an optimization design of meteorological facsimile receiver based on the software radio is proposed. The receiver features a small active receiving antenna with noise matching （which consists of the J type FET, the ESD protection circuit and the filter circuit）, the super-heterodyne reception, electrically tunable filter, digital demodulation and the FFT synchronization algorithm, Rife, DSTFT based FSK.

关 键 词：船舶工程 气象传真接收机 短波通信 软件无线电 数字信号处理 安全信息播发 

分 类 号：TN917.8[电子电信—通信与信息系统]