摘要
为了满足无人机遥控链路远距离、高动态、强抗干扰能力的军事通信需求,设计了基于长码直接序列扩频技术的FPGA实现方案。该方案采用了一种基于FFT算法的快速伪码捕获方法,将传统的伪码相位与多普勒频移二维搜索过程简化为两者同时捕获的一维搜索过程。经过硬件实现与测试,该方案可有效减少硬件资源消耗,同时缩短捕获时间。
A FPGA implementation scheme is designed based on long code direct sequence spread spectrum technology to meet the demands of long-range, high-dynamic and strong anti-jamming abilities of the UAV remote control link used in mili- tary communication domain. The scheme adopts a rapid PN-code acquisition method, based on FFT arithmetic, to simplify the traditional two-dimensional search process depending on PN-code phase and Doppler frequency shift to one-dimensional search progress which can capture the both at the same time. The hardware testing proves that the scheme can reduce the loss of hardware resource effectively, and at the same time shorten the time of acquisition.
出处
《现代电子技术》
2012年第21期25-27,30,共4页
Modern Electronics Technique
基金
陕西省自然科学基金(2009JM8001-4)
关键词
无人机遥控链路
直接序列扩频
长码捕获
FPGA
UAV remote control link
direct sequence spread spectrum
long code acquisition
FPGA
