基于多片FPGA的FHDS卫星测控信号捕获设计  

Multi-FPGA acquisition of FHDS satellite TT&C signal

作　　者：陈啸[1] 李广侠[1] 李志强[1] 朱文明[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《电子技术应用》2016年第7期72-75,共4页Application of Electronic Technique

基　　金：国家自然科学基金资助项目(61571464)

摘　　要：多片FPGA组成的星形系统可解决跳频和直接序列混合扩频(FHDS)卫星测控信号大时延差高动态条件下的快速捕获问题。捕获搜索时采用1"主"+N"副"形式的Multi-FPGA组分时进行多普勒搜索,主FPGA实现捕获控制和快速解跳解扩,其余N片FPGA实现码片以下时间差的精细搜索和相干累积。针对信号体制和捕获性能需求,所有芯片均采用Xilinx公司的基于RAM的XQR4VFX系列。本设计解决了单片宇航级FPGA资源受限条件下复杂捕获问题,具有FPGA配置文件数目少、成本低、功耗低的优点。A multi-FPGA system is devised to implement the acquisition of a hybrid fast frequency hopping and direct-sequence spread spectrum satellite TT＆C signal under large time delay and high dynamics.The system searches the Doppler frequency in time-division manner,while one main FPGA manages the acquisition control and the fast wiping off FH carrier and DS code and N-supplementary FPGAs deal with the finer time searching and coherent accumulating.According to the signal paradigm and acqui-sition requirements,the processors are of Xilinx XQR4VFX-series.With fewer programming files and low power consumption,the complex signal acquisition problem is solved while the space-grade processor with higher performance is not available.

关 键 词：FHDS混合扩频 多片FPGA 测控 信号捕获 

分 类 号：TN927[电子电信—通信与信息系统]