摘要
针对高动态环境下扩频信号的载波捕获与跟踪问题 ,本文分析了多普勒频移对锁相环、锁频环以及环路滤波器设计的影响 ,以及高动态环境中载波快速捕获问题 ,在此基础上提出了一种数字复合软环的设计方法 。
For the question of carrier acquisition and tracking of high-dynamic spread spectrum signals,the analysis is presented for the influence of Doppler frequency shifts to the design of PLL(Phase-Locked-Loops),FLL (Frequency-Locked-Loops),and loop filters.Also,the question of fast carrier acquisition for high-dynamic spread spectrum signals is analyzed.The new design method of digital complex soft loops is proposed,and the simulation results show that the question of fast carrier acquisition and tracking is solved by this digital complex soft loops.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2003年第z1期2147-2150,共4页
Acta Electronica Sinica
关键词
扩频通信
载波跟踪
高动态
spread spectrum communication
carrier tracking
high-dynamic
