1 in the research of design of radar waveform , one kind of hybrid radar waveform obtained by combining the chirp waveform with the non - periodic pseudorandom sequences is discussed . through the theoretical analysis and computer simulation , several main characteristics of this kinds of hybrid waveforms are discussed , such as the ambiguity function , ambiguity graph , the spectrum , the weighting methods , the response of the processing filter and the low probability of interception . those are showing the effectiveness of the new hybrid waveforms on the performance of high resolution and low probability of interception 作者在以下几个方面的研究工作中取得了进展及创新： 1 、在雷达波形设计中，介绍了一类新的线性调频信号与非周期随机编码信号相结合的组合波形的组合形式，通过理论分析和大量的计算机模拟研究了这类组合波形的模糊函数(图) 、频谱特性、多普勒频移特性、加权输出特性、低截获等方面的特点，证明了新型的组合波形在高分辨、低截获等方面的有效性。
Take integrity of object information into condition , a two - dimension signal processing method which can make a measurement of the target ’ s speed as well as the range is brought forward at the basis of waveform parameter design . and simulation in the background of hf multi - object with noise is taken . a comparison of signal properties , processing and antinoise detection performance is taken between mcpc and another two high range resolution radar signals : single carrier pulse coded signal and step frequency pulse coded signal 考虑到目标信息提取的相对完整性,以高频雷达为背景,在对多载波相位编码脉冲串信号参数设计的基础上,推导了三种多载频相位编码脉冲串信号的距离速度二维处理过程并相应的对多目标噪声环境进行了仿真;将多载波相位编码信号与另外两种距离高分辨信号:单载频相位编码信号和相位编码阶梯跳频信号,在信号特性、处理过程和抗噪声特性方面进行了对比;本文从理论上为多载波相位编码信号的波形设计和分析、信号的处理打下基础。
Once has the bandits and thieves to intrude guards against the place , the detector launches the wireless coded signal immediately , the networking center number which installs when is apart from defense area 150 meter within the main engine to send out the police whistle sound to report to the police immediately , reports to the police dials to establish in advance or reports to the police the telephone , the handset number , answers in the police telephone to return puts user pre - record to report to the police the pronunciation , long - distance reports to the police , simultaneously comes the real - time transmission through the internet to deploy troops for defense , to withdraw from a defended position , to report to the police and so on the condition , inquires the historic record through the computer network 该系统还采用美国进口原装芯片与先进的无线数字高频技术微电脑cpu控制器主机组成。在防范地点安装好主机后，并设置在布防状态。一旦有盗贼闯入防范地点，探测器立刻发射无线编码信号，安装在距防区150米以内的主机立即发出警笛声报警，报警时拨打预先设定的联网中心号码或报警电话手机号码，接警电话里回放用户预录的报警语音，远程报警，同时通过互联网来实时传递布防撤防报警等状态，通过电脑网络来查询历史记录。
Based on the amplitude and phase of two - order cyclic spectrum of phase - code signals , a novel cyclic spectrum estimation approach is proposed to estimate the carrier frequency , chip width , amplitude , initial phase , timing epoch of spreading code under no parameter information . this approach is computationally efficient , and is easy to be implemented , and it shows a good estimation accuracy over analysis 基于相位编码信号循环谱的幅度和相位特性，提出了二阶循环平稳参数估计方法，可庄没有任何参数信息情况下，实现载频、码片时宽、幅度、初相、编码序列初始时间等参数的估计，估计方法计算量少，易于实现，且有良好的估计精度。
The reseach work focused on the time delay estimation of the common practical radar singnals , including harmonics signal , chirp signal , polynomial phase signal , and phase - shift keying signal . the new algorithm for different radar signals are deduced in detail respectively , and simulation results are presented . the results proved that the new method is efficient for time delay and some other parameters estimation 正弦信号、线性调频信号、多项式相位信号、相位编码信号是雷达信号中常用的几种信号,对这几种信号的研究是雷达信号处理中非常重要的内容,也是实际工程的需要。因此,本文选择上述几种信号作为研究对象,对这几种信号的时延估计算法进行了建模和理论推导,给出了时延估计算法的具体表达式,并进行了计算机仿真。
In the dissertation , phase - coded signals and chirp signals are studied . because the two signals have cyclic features , the cyclostationary theory has been applied in the detection and estimation of both signals . some novel methods of detection and estimation are proposed after intensive investigation 本文主要对两种主要低截获概率信号(相位编码信号和线性调频信号)进行了研究和探讨，基于两种信号都具有循环平稳性，将循环平稳理论应用于信号的检测和参数估计，通过深入研究提出了一些有效的检测和估计方法。
The creative of this paper is taking a special encode way , thus it avoid the disturbance in much degree between the different user who use the remote control encode asic . furthermore , the encode signal can be transmitted and received reliable , which make it have very high reliance 本论文的创新之处，就是在设计中采用独特的编码方式，很大程度上地排除了使用该编码asic的不同遥控用户之间的相互干扰，而且在无线传输方式下，编码信号能实现可靠传输和接收，使得该asic具有高可靠性
This article analyses the signal characteristics of several typical cw radars , and presents the principle and application of doppler radar . as one focal point , this article researches the generation and math characteristics of pseudorandom code modulated signal , analyses the spectrum of pseudorandom code phase modulation radar signal , and presents this kind of signal ' s application in distance and speed measurement . this article also researches the application of mono - pulse amplitude comparison radar in angle measurement finally , this article elaborates the working process of crs in uast 本文分析了几种典型的连续波雷达信号的特性，介绍了多普勒雷达的原理和应用；研究了伪随机编码信号的产生和数学特征，着重分析了伪码调相连续波雷达信号的频谱，及其在雷达测距、测速方面的应用；研究了单脉冲幅度比较体制在雷达测角中的应用；最后，阐述了超近反导系统中复合体制雷达的工作过程。
The work of this dissertation is focused on research of some key technics in signal design and processing of mcpc signal . the main content of the dissertation is summarized as follows : it gives a detailed description of the form of the mcpc waveform and its mathematical model , and analyses the formation and properties of phase coded sequence . it discusses the effect of signal parameters on autocorrelation , power spectra and ambiguity function in forms of single pulse and pulse train and compares different kinds of single pulse signals and pulse train signals 本文围绕着多载波相位编码信号在信号设计与信号处理的若干关键问题进行了研究,主要做了以下工作:描述了多载波相位编码信号( multicarrierphasecoded ,简称mcpc )的信号形式,给出了其数学模型,对其中相位编码序列的构成方式与特性进行了分析;从单脉冲和脉冲串两种信号形式入手,对多载频相位编码信号的参数在自相关函数、功率谱密度和模糊方程上的影响作了详细地讨论,对不同调制方式的单脉冲和脉冲串信号进行了比较。
