摘要
一箭多星发射上升段测控中,主要影响因素为扩频信号的码间多址干扰。开展码间多址干扰试验和实战分析,对地面高质量测控支持具有一定的现实意义和参考价值。基于直接序列扩频系统抗码间多址干扰原理,实施了双目标和三目标的码间干扰测试,并在三星上升段测控中码间多址干扰对测控影响进行了详细分析。结果表明,码间多址干扰会引起下行测量支路、遥测支路失锁,引起外测、遥测数据丢失;对测角随机差、测速测距随机差基本无影响,对上行遥控无直接影响,但对遥测的影响可以间接影响到遥控发令的完成。
In the ascent stage TT&C in the multi-satellite launch,the influence of inter-symbol multiple access interference of the spread spectrum signal on the TT&C is the main factor.To carry out inter-symbol multiple access interference test and practical analysis has certain practical significance and reference value for high-quality ground-based TT&C support.Based on anti-inter-symbol multiple access interference principle of the direct sequence spread spectrum system,the dual-target and three-target inter-symbol interference tests were implemented,and a detailed analysis of the influence of inter-symbol multiple access interference on ascent stage TT&C of three satellites is conducted.The results show that the inter-symbol multiple access interference will cause the losing lock of downlink measurement branch and the telemetry branch and the loss of external measurement and telemetry data;the inter-symbol multiple access interference has little effect on the random error of the goniometry and random error of velocity and range measurement and has no direct effect on the uplink remote control,but the effect on telemetry can indirectly affect the completion of the remote control command.
作者
龙斌
杨俊武
王宏伟
钱国俊
LONG Bin;YANG Junwu;WANG Hongwei;QIAN Guojun(Unit 63758,PLA,Xiamen 361023,China;Xi’an Satellite Control Center,Xi’an 710043,China)
出处
《无线电工程》
2020年第2期148-152,共5页
Radio Engineering
关键词
直接序列扩频
码间多址干扰
测速
测距
遥控
direct sequence spread spectrum
inter-symbol multiple access interference
velocity measurement
ranging
remote control
