摘要
采用单脉冲单通道角跟踪体制,提出一种基于数字信道化实现大动态脉冲编码调制/频率调制(PCM/FM)遥测信号的角跟踪方法。由于PCM/FM信号是一个窄带信号,而多普勒频偏达到±1MHz,为了能在较宽的接收带宽、较大多普勒频偏中准确捕获跟踪到窄带PCM/FM信号,首先对接收信号进行数字信道化划分,对多个子信道同时检测,将检测后的数据进行融合、幅度检波,最后进行角误差的估计。仿真结果表明,本文提出的方法能够快速实现信号的角跟踪,高效可行。
The angle tracking technology based on digital channelized large dynamic Pulse Code Modulation/Frequency Modulation(PCM/FM) telemetry signals is presented by using monopulse angle tracking system.PCM/FM signal is a kind of narrowband signal,whereas the Doppler frequency shift is very large,which reaches to ±1MHz.In order to capture and track the narrowband PCM/FM signals accurately in a broad bandwidth and at large Doppler frequency shift,the digital channelized technology is adopted;and all the subsidiary channels are detected at the same time;the data fusion and amplitude detection are performed after the detection;and finally the angle error is estimated.Simulation results show that the proposed method can achieve signal angle tracking fast,efficiently and feasibly.
出处
《信息与电子工程》
2012年第5期528-533,共6页
information and electronic engineering
关键词
单脉冲单通道
角跟踪系统
数字信道化
大动态
single channel monopulse
angle tracking system
digital channelized
large dynamic
