卫星测控直扩信号安全性能评价体系研究  

Evaluation System for Safety Performance of DSSS Signals

作　　者：何涛[1,2] 李志强[3] 梁旭文[1,2] 

机构地区：[1]上海微小卫星工程中心,上海201203 [2]中国科学院上海微系统与信息技术研究所,上海200050 [3]解放军理工大学,南京210007

出　　处：《飞行器测控学报》2014年第1期7-14,共8页Journal of Spacecraft TT&C Technology

基　　金：国家自然科学基金(No.61032004)

摘　　要：为了定量评估直扩信号的安全性能,在给出卫星测控直扩信号安全防护定义的基础上,对卫星测控直扩信号安全性能评价指标进行了研究。在深入分析直扩信号典型威胁的基础上,提出了等效码长、调制指数、码速率截获因数、等效码长截获因数、码序列截获因数、干扰因数等衍生指标,分析、仿真了它们的影响因素,得到了它们与基本指标的关系,初步建立了直扩信号安全性能评价体系,为后续安全性能评估打下基础。The safety performance evaluation indexes of DSSS （Direct Sequence Spread Spectrum） signals are studied for satellite TT＆C （Telemetry,Tracking and Command） are studied for quantitative evaluation of the safety performance of DSSS signals.Definition of safety protection of DSSS signals for satellite TT＆C is given.Following detailed analysis of the typical threats to DSSS signals,derivative indexes including equivalent code length,modulation index,intercept factors of different parameters and interference factor,are put forward.Their factors of influence are analyzed and simulated and their relationship with the basic indexes is got.Based on these,a safety performance evaluation system for DSSS signals is established to facilitate evaluation of the safety performance of DSSS signals.

关 键 词：直扩信号 安全性能评估 评价体系 截获因数 等效码长 调制指数 卫星测控 

分 类 号：V1[航空宇航科学与技术—人机与环境工程] V528