| 1. | In this paper , firstly , radar pulse compression is introduced briefly , summarize three primary pulse compression signals : lfm , nlfm , pcm
本文首先对雷达脉冲压缩的原理作了简要的介绍，进一步详细分析了应用最广泛的线性调频信号，并简要介绍了非线性调频信号和相位编码信号。 |
| 2. | Lfm signal is a classic pulse compression signal and it is one of the ultra - wideband radar waveforms , there is sophisticated theoretical basis of its generating , receiving and processing
线性调频信号作为一种典型的脉压信号,同时也是超宽带雷达调制波形中的一种,其产生和接收处理已具备了较为成熟的理论研究。 |
| 3. | With the development of digital technology , getting pulse compression signals with direct digital synthesis has been in general use these days . it is widely used to generate pulse compression signal using dds method
随着现代数字技术的发展,直接数字波形合成( dds )的方式获得脉冲压缩信号已为现代雷达普遍采用。 |
| 4. | Secondly , this dissertation analyses the method of waveform designing and processing for three hybrid pulse compression signals . the combined signals are improved on the characteristic than the single modulation mode
其次,本文分析了三种组合脉冲压缩信号的设计和处理方法,合成信号的性能较以前的单一信号有很大改善。 |
| 5. | With the development of modern digital technology and vlsi , the method of digital waveform synthesis of the pulse compression signals is now widely used in radar systems
现代数字技术和vlsi技术迅猛发展,波形合成已经由传统的纯模拟方法发展到现在的直接数字合成,数字方式获得脉冲压缩信号已成为现代雷达普遍采用的波形合成方法。 |
| 6. | Linear frequency modulated ( lfm ) signals as the most popular pulse compression signal are a typical kind of time - varying , nonstationary signals , so applying the wigner - ville distribution into lfm signals has more advantages than conventional methods
雷达脉冲压缩技术中所使用的线性调频信号是一类典型的时变非平稳信号，采用时频分析的研究方法处理线性调频信号有着传统方法无法比拟的优点。 |
| 7. | Second , this dissertation focuses on the error analysis of digital method of the pulse compression signal generation based on lfm signals . the difference and similarity between technique of the direct reading of the stored digital waveform and technique of the direct digital synthesis were also compared
?第二部分以lfm脉压信号为基础，围绕数字脉压波形产生系统的误差分析展开，对波形存储直读法和直接数字合成法两种数字波形产生技术进行全面的分析对比。 |
| 8. | Except , the error model of orthogonal modulation and double frequency technology were studied . third , the design and implementation of ultra wide band lfm generator were studied . an ultra wide band lfm pulse compression signal generator with 400mhz carrier and 300mhz absolute bandwidth was developed successful
?第三部分在理论分析的基础上对超宽带lfm信号源系统的设计和实现技术进行研究，成功研制出了中心频率为400mhz ，带宽为300mhz ，重复频率为1khz ，脉宽为20 s的线性调频信号。 |
| 9. | Third , this dissertation focuses on the error analysis of digital method of the pulse compression signal generation based on lfm signals . except , the error model is established here . fourth , pre - distortion calibration technique is studied and applied to improve signal quality , meanwhile the software is developed
第三部分对宽带信号源模块系统性能进行了分析,给出了系统误差,介绍了各部分误差对系统性能的影响,并建立误差模型,为后面预失真技术提供理论基础。 |
| 10. | Pulse compression performances of many pulse compression signals are analyzed in frequency domain . and the methods to design kinds ok range sidelobe suppression filters are proposed . this dissertation produced the method to improve parallelism of fft calculation in vliw architecture and a pulse compression procession system in frequency domain based on adsp2106x which had been emulated by using visualdsp + + , and the result is meet the theory
本文主要介绍了使用越来越广泛的频域数字脉压处理技术，分析了各种脉压信号的频域脉压性能及其旁瓣抑制滤波器设计，设计了一个基于adsp2106x芯片的频域数字脉压处理系统，针对adsp2106x芯片的vliw指令结构，利用芯片的并行运算能力提高fft效率，并使用visualdsp + +对系统进行了仿真测试，结果与理论相符。 |
