Frequency modulated continuous wave synthetic aperture radar ( fm - cw sar ) can be miniaturized , and it is fit for light - duty flight platform wonderfully 調(diào)頻連續(xù)波合成孔徑雷達(dá)可以實(shí)現(xiàn)小型化,能非常好地滿足輕型飛行平臺對成像設(shè)備的要求。
In this dissertation , at first , introducing the theory of linear frequency modulated continuous wave radar . the designing of the signal processing hardware platform is basing on the algorithm 在本文中,首先介紹了線性調(diào)頻雷達(dá)的工作原理和相關(guān)的理論,根據(jù)這些算法要求,來設(shè)計(jì)信號處理的硬件平臺。
Briefly , here are main topics of this dissertation : ( 1 ) the relation between the resolving power of the linear frequency modulated continuous wave radar and the linearity of linear frequency modulation signal 同樣,輸出數(shù)據(jù)也可以通過雙口ram和pci接口輸出。本文的主要工作包括: ( 1 )介紹了線性調(diào)頻雷達(dá)距離分辨力和調(diào)頻線性度的關(guān)系。
It demonstrates the general project of vehicles mutual moving - state detection and control system , which use a frequency modulated continuous wave ( fmcw ) radar with the antenna replaced by a frequency scanning array as the basis of detecting sensor 文中闡述了汽車相互運(yùn)動狀態(tài)監(jiān)控系統(tǒng)的總體方案,使用調(diào)頻連續(xù)波( fmcw )雷達(dá)作為探測傳感器的基礎(chǔ),并在天線部分作了改進(jìn),采用了獨(dú)立的頻率掃描天線。
With the development of the self - oscillating mixer ( som ) theory , the application of som has been studied thoroughly and shows potentials in many fields . this paper introduces the development of som technology in the pass few years at first . then it shows some popular nonlinear techniques used in analyzing the nonlinear circuits . the technology of som can be used in the doppler radar for velocity measurement and in frequency modulated continuous wave ( fmcw ) for distance measurement 本文通過對自振混頻技術(shù)基本理論的研究,介紹了對非線性電路進(jìn)行分析的理論方法以及在自振混頻器技術(shù)分析中的應(yīng)用,然后對自振混頻技術(shù)在多普勒測速雷達(dá)和調(diào)頻連續(xù)波( fmcw )雷達(dá)上的應(yīng)用進(jìn)行了研究。
Linear frequency modulated continuous wave ( lfmcw ) radar has many characteristics of simple structure , small volume , light weight , low cost , low transmitter peak power , short wavelength , thus it is especially suitable to be used in radar image , research of target characteristic , end control and guide , battlefield spy , scene watch etc . and more people in the world interested in it , it will have a wide prospect 線性調(diào)頻雷達(dá)具有結(jié)構(gòu)簡單、體積小、重量輕、造價低、發(fā)射峰值功率低、波長短等一系列優(yōu)點(diǎn),特別適合于雷達(dá)成像、目標(biāo)特性研究、末制導(dǎo)、戰(zhàn)場偵察和場面監(jiān)視等領(lǐng)域,目前已受到國內(nèi)外的廣泛重視與研究,應(yīng)用前景十分誘人。
The pseudorandom codes have a good autocorrelation of double - values . in recent years , to solve the problems of anti - interference and the ambiguity of range and velocity , a lot of countries do much research to change the waveform of radar signal . the most important improve is to use symmetrical pulses to interrupt frequency modulated continuous wave ( fmpcw ) 早期的fmicw采用偽碼序列截?cái)?偽隨機(jī)碼具有良好的雙值自相關(guān)特性,其中最常用的是m序列截?cái)嗟膄micw 。近年來,為了解決抗干擾和測距、測速模糊問題,許多國家已對雷達(dá)信號波形的改進(jìn)進(jìn)行了研究。
Then to meet the problem of the separate between receiving and transmitting for single - station radar system in continuous wave principle , we introduced frequency modulated interrupted continuous wave ( fmicw ) . in early days , the pseudorandom codes were often used in fmicw . usually m - sequence is used to intertupt frequency modulated continuous wave 之后,為了解決連續(xù)波體制下,單站收發(fā)共址的雷達(dá)系統(tǒng)的收發(fā)隔離問題,又普遍采用了截?cái)嗟木€性調(diào)頻連續(xù)波信號形式,叫做線性調(diào)頻中斷連續(xù)波信號( fmicw ) 。