摘要
长PN码的捕获是TDRSS的关键技术之一。特别是码长达到261888的超长码,要求在低信噪比、较短时间内的捕获,一直是一个难题。本文在对PN码的跟踪、PN码捕获的原理进行简述的基础上,给出了一种长PN码并行捕获的设计与实现方案。该方案捕获时间短,抗噪声性能好,便于工程实现。
Long Pseodo Noise(PN) code detection is one of the key techniques in TDRSS.It is a difficult problem that long codes are required to be detected at low Signal-to-Noise and with little time,especially when the PN code has 261888 chip. In this paper, the theory of PN code detection is introduced, and a scheme of the design and realization of long PN code detection is given,the method is available in real-time implementation.
出处
《电讯技术》
北大核心
2004年第4期128-131,共4页
Telecommunication Engineering
关键词
TDRSS
长PN码
并行捕获
扩频
TDRSS
Long PN code
Parallel acquisition
Spread spectrum
