【作者】 黄鹏刚；

【导师】 赵树杰；

【作者基本信息】 西安电子科技大学 ， 信号与信息处理， 2000， 硕士

【摘要】 论文结合某型号雷达系统的技战术指标要求，考虑现代信号处理技术与器件的发展，研究了线性调频信号（LFM）的产生、数字脉冲压缩技术及其工程设计等主要问题。 论文讨论了线性调频信号产生的主要方法，比较了其主要性能和优缺点，决定采用直接数字频率合成（DDS）技术产生不同带宽和时宽的线性调频信号；论文从理论上分析了线性调频信号的脉冲压缩技术、性能、参数选择及提高压缩性能的方法，用计算机仿真技术研究了脉冲压缩的主要参数：A/D变换位数、采样频率、样点数目等和加窗技术对压缩性能：主副瓣比、压缩后的脉宽、目标分辨力等的影响，获得了大量的有用结果；论文最后结合某型号雷达系统的工程研制，提出了采用DDS技术产生LFM信号，以浮点DSP处理器APSP21062为核心的，并行处理的数字脉冲压缩工程设计方案，并做了相应的硬、软件设计说明。更多还原

【Abstract】 In combination with technical and tactical specifications requirements of a radarwith some type , this paper researches the generation of linear FM (LFM) signaldigital pulse compression technique as well as the engineering design . The modemsignal processing technique and development of elements are in consideration.This paper discusses main methods to generate LFM signal and disadvantagesThe direct digital synthesis (DDS) technique is decided to be used to generate LFMsignal with different band width and time width .The paper analyzse in theory the LFMsignal pulse compression technique, performance ,parameter selection andcompression performance improvement methods . The computer simulition techniqueis used in this paper to study not only main parameters for pulse compression bits forA/D conversion, sampling frequency , and number of sample points but also the effectcaused by windowing technique on the compression performance main-to-side loberatio , pulse width after compression and target resolution . A large amout of usefulresults are abtained . In combination with the engineering development for a radarsome type , this paper finally gives a paralle-processed digital pulse compressionengineering design scheme , in which DDS technique is adopted to generate LFMsignal and floating-point DSP precessor ADSP2 1062 is the heart . The respectivedesign descriptions are also made for hardware and software.更多还原