改进型FQPSK的FPGA设计与实现  

Design and Implementation of Improving FQPSK Based on FPGA

作　　者：孙雪峰 王志有 宋锐 夏国江 王岩 

机构地区：[1]北京宇航系统工程研究所,北京100076

出　　处：《测控技术》2016年第11期29-32,共4页Measurement & Control Technology

摘　　要：随着运载火箭飞行试验任务复杂程度提高以及大型运载火箭和未来重型运载火箭的研制,信息传输所需的码速率迅速提高,频谱资源越来越紧张,PCM-FM调制体制已经不满足需求。为了提高频带的利用率,论述了一种改进型的FQPSK,并且对它的性能进行了仿真分析,证明改进型的FQPSK包络恒定,缩减了包络起伏,提高了频带利用率。为了验证了其在遥测系统中实现的可行性,使用FPGA对改进型FQPSK进行了设计与实现,查表法和延时后移减小了系统的复杂度,使系统更小、具有更好的同步性。With the increasing complexity of launch vehicle flight test tasks and the development of large carrier launch vehicle and future heave launch vehicle,the rate of the information transmission increased rapidly,leading to the spectrum resource becoming more and more intense,PCM-FM modulation system can not meet the requirement.In order to improve the spectrum utilization,an improved FQPSK is discussed.Through simulation and analysis,it is demonstrated that the FQPSK has a constant envelop and cuts the envelop fluctuation,which improves the utilization of bandwidth.To verify the feasibility of the telemetry realization,the improved FQPSK using FPGA is designed and realized.The complexity of the system is reduced by using the look-up table method and delay time shift,which makes the system smaller and has better synchronization.

关 键 词：运载火箭 FPGA 遥测 改进型FQPSK 调制方式 

分 类 号：TN761[电子电信—电路与系统]