DS/FH混合扩频测速技术研究  

Research on DS/FH Hybrid Spread Spectrum Range Rate Measurement Technology

作　　者：赵国豹[1] 刘云飞[1] 郭肃丽[1] 

机构地区：[1]中国电子科技集团公司第54研究所

出　　处：《飞行器测控学报》2011年第4期27-30,共4页Journal of Spacecraft TT&C Technology

摘　　要：由于DS/FH混合扩频信号带宽较宽,传输信道难以保证信号在宽带条件下线性传输,信号会发生群时延畸变,导致载波相位不再连续,影响载波的稳定跟踪,从而使测速精度降低。本文提出了基于跳频图案同步辅助的鉴频方案,可以消除相位跳变对载波跟踪的影响,实现对扩跳信号载波的稳定跟踪,从而提高DS/FH混合扩频测速的精度。The bandwidth of DS/FH spread spectrum signal is wide and the communication channel is non-linear in bandwidth.This brings about distortion of group delay and discontinuity of the phase of carrier.As a result,the stability of carrier tracking is affected and the accuracy of range rate measurement is degraded.A scheme of frequency discrimination based on synchronization of frequency hopping pattern is presented in this paper and it eliminates the influence of phase hopping on carrier tracking to achieve stability of carrier tracking and thus improve the accuracy of range rate measurement.

关 键 词：航天测控 DS/FH扩频 测速 群时延 

分 类 号：V556[航空宇航科学与技术—人机与环境工程]