摘要
针对短时猝发式直扩系统中大频偏情况下信号载波的捕获和跟踪问题,提出了一种集扫频、FFT频率估计和数字锁相环技术于一体的载波同步实现方案。基于Matlab进行方案仿真和基于FPGA平台进行硬件实现,并通过EDA软件SignalTap工具实时捕获数据完成方案可行性验证。结果表明,该方案可以满足系统设计要求。
A scheme is proposed to achieved carrier synchronization based on sweeping frequency, FFT frequency estimation and digital PLL, in order to solve the problem of carrier acquisition and tracking of spread spectrum signals under large frequency offset circumstance in short-term burst-mode DSSS system. The scheme is successfully simulated by MATLAB and validated with SignalTap tools based on FPGA hardware platform. The results show that the scheme can meet the system design which smoothly achieves carrier acquisition and tracking of spread spectrum signals.
出处
《电子技术应用》
北大核心
2013年第3期115-118,共4页
Application of Electronic Technique
基金
浙江省教育厅项目(Y201018592)
关键词
频率估计
扫频
数字锁相环
载波同步
frequency estimation
sweeping frequency
digital PLL
carrier synchronization
