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Research on resolution between multi-component LFM signals in the fractional Fourier domain

Science China(Information Sciences) 2012年第6期55卷 1301-1312页

作者： LIU Feng 1,XU HuiFa 1,2,TAO Ran 3 & WANG Yue 3 1 Department of Electronic and Information Engineering,Naval Aeronautical Engineering Institute,Yantai 264001,China 2 The 94362 th Unit of People's Liberation Army,Qingdao 266111,China 3 School of Information Science and Technology,Beijing Institute of Technology,Beijing 100081,China Department of Electronic and Information Engineering Naval Aeronautical Engineering Institute The 94362th Unit of People"s Liberation Army School of Information Science and Technology Beijing Institute of Technology

When the initial frequencies and chirp rates of multi-component linear frequency modulation (LFM or chirp) signals are close,the signals may not be distinguished in the fractional Fourier domain (FRFD).Consequently,some signals cannot be *** this paper,first,the spectral distribution characteristics of a continuous LFM signal in the FRFD are analyzed,and then the spectral distribution characteristics of a LFM signal in the discrete FRFD are ***,the critical resolution distance between the peaks of two LFM signals in the FRFD is deduced,and the relationship between the dimensional normalization parameter and the distance between two LFM signals in the FRFD is also *** is discovered that selecting a proper dimensional normalization parameter can increase the ***,a method to select the parameter is proposed,which can improve the resolution ability of the fractional Fourier transform (FRFT).Its effectiveness is verified by simulation results.

关键词： fractional Fourier transform LFM signal signal resolution

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3MMW LFMCW Experimental Radar System

3MMW LFMCW Experimental Radar System

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1996 CIE International Conference of Radar(ICR’96)

作者： Feng Jianxiong Wang Xuegang Xiang Jingcheng University of Electronic Science and Technology

＜正＞This paper discusses the advances in the key techniques of 3MMW LFMCW radar system in China,and presents a 3MMW LFMCW experimental radar system.A series of outdoor trials has been done which yield very promising... 详细信息

ISBN: (纸本)0780329147

关键词： FM radar CW radar signal resolution MMW LFMCW experimental radar system China outdoor trials millimetre wave radar linear frequency-modulated continuous wave radar wide frequency modulation bandwidth high range resolution high signal to noise ratio 3 mm

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On Discrete-Amplitude Multiresolution Analysis

On Discrete-Amplitude Multiresolution Analysis

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1996 3rd International Conference on signal Processing(ICSP’96)

作者： Sun Hong Yao Tian Ren Yao Wen Bing Huazhong University of Science and Technology

ISBN: (纸本)0780329120

＜正＞In this paper,a new concept named Discrete-Amplitude Multiresolution（DAM） is proposed,in which the representation precision of signal amplitude is taken as its *** the discrete multiresolution algorithms presented in references and are classified them into two broad types,frequency-decomposition and time-decomposition, DAM is a kind of *** is discussed that DAM decomposition in some local segments of a signal behaves like certain self-similar tilings at reasonable scales,and this provides basis for signal *** for reconstructing a signal from its 2-biti binary representation is ***, examples of applications of DAM to digital signal processing is discussed and some attractive features of DAM in its implementation are revealed:computational simplicity,parallel processing,and quantization-error free.

关键词： signal reconstruction signal resolution signal representation parallel processing discrete amplitude multiresolution analysis signal amplitude representation discrete multiresolution algorithms frequency decomposition time decomposition code decomposition local signal segments self-similar tilings signal compression signal reconstruction binary representation digital signal processing parallel processing quantization-error free method computational simplicity

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A Design of High Speed AGTL+ Output Buffer

A Design of High Speed AGTL+ Output Buffer

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2005 6th International Conference on ASIC

作者： Donglin Wang Shaoqing Li Zhenyu Zhao 617 laboratory School of Computer ScienceNational University of Defense Technology

ISBN: (纸本)0780392108;9780780392106

＜正＞AGTL+（Assisted Gunning Transceiver Logic+） signal transmission and interface technology are analyzed in this *** resolve the problem on such short high-level duration time in traditional design,we have proposed an auxiliary charged circuit *** to what I have analyzed,we design and realize a AGTL+ interface circuit,which is completely compatible with Itanium 2 interface and has high-speed and high noise *** operating frequency of circuit reaches to 500MHz by SPICE simulation in the condition of 0.18μm standard CMOS process.

关键词： Voltage Frequency Logic design Circuit synthesis Transceivers signal resolution Circuit simulation signal processing Microprocessors Laboratories

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Angle-tracking for Two Unresolved Targets by High resolution Spectrum Analysis and Pipeline Technique

Angle-tracking for Two Unresolved Targets by High Resolution...

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2006 8th International Conference on signal Processing

作者： Yang Li Tao Zeng Bingqi Ji Weishan Wu School of Information Science and Technology Beijing Institute of Technology

ISBN: (纸本)0780397371;9780780397378

＜正＞The missile seeker under consideration uses monopulse techniques measure the target angular *** two unresolved targets are present,the target DOAs（direction of arrival） are extracted with large errors.A novel method is proposed which implements high resolution spectrum analysis and pipeline technique to extract the angular information ***,the data rate of the DOA measurements is maintained. Therefore it gives a better tracking performance comparing with some classical methods.

关键词： Pipelines Frequency Missiles Target tracking signal resolution Radar tracking Direction of arrival estimation Information analysis Data mining Interference

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An Overview of the Principles of Ultra-wideband Impulse Radar

An Overview of the Principles of Ultra-wideband Impulse Rada...

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1996 CIE International Conference of Radar(ICR’96)

作者： Malek G.M.Hussain Electrical and Computer Engineering Department Kuwait University Sate of Kuwait

＜正＞Over the past decade,extensive research work has been carried out to develop the ultrawideband （UWB）technology for radar applications, and to resolve the practical challenges met in implementing an efficient UWB radar *** this paper, we shall present an overview of the basic principles of UWB impulse *** focus will be on the principles of UWB signal generation,impulse radiation, waveform design,pulse compression,range-velocity resolution （ambiguity function）,array beamforming,and radar-target signature.

关键词： Ultra wideband technology Ultra wideband radar Bandwidth Radar applications Pulse compression methods Array signal processing Frequency signal resolution signal generators signal design

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Equation Method for DOA Estimation of Complete Coherent Sources

Equation Method for DOA Estimation of Complete Coherent Sour...

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1996 3rd International Conference on signal Processing(ICSP’96)

作者： Zhong Ding Lei Xiu Kun Huang Shu Jing Zhang Institute of Information Science Northern Jiaotong University

ISBN: (纸本)0780329120

＜正＞An Equation Method for high-resolution direction-of-arrival（DOA） estimation of complete coherent sources is *** method,which has superhigh resolution,is based on resolving equations about received data and estimated unknown parameters of DOA. Algorithm of the method to uniform linear array（ULA） is given and simulation results demonstrate its superior performance.

关键词： direction-of-arrival estimation signal resolution linear antenna arrays array signal processing covariance matrices equation method DOA estimation complete coherent sources direction-of-arrival estimation superhigh resolution uniform linear array simulation results array processing

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DISCUSSION ON THE REQUIREMENTS OF VNIR HYPERSPECTRAL DATA FOR AGRICULTURAL APPLICATIONS ACCORDING TO PHI DATA AND CSAM MODEL

DISCUSSION ON THE REQUIREMENTS OF VNIR HYPERSPECTRAL DATA FO...

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2001 International Conferences on Info-tech and Info-net

作者： Yongchao ZHAO Qingxi TONG Lanfen ZHENG Bing ZHANG Xia ZHANG Jiwei BAI Chuanqing WU Tuanjie LIU Laboratory of Remote Sensing Information Sciences The Institute of Remote Sensing ApplicationsChinese Academy of Sciences

According to the application of PHI data on agricultural information extraction both in Changzhou, China and ***,we found that the results closely depend on the HRS data *** the spectral features of vegetation are particular with high shape similarity but with high intensity variation,the quality requirements are *** general factors of pixel size,band combination and noise limit for dilTerent informalion objects are discussed in this *** to the two models of CSAM and *** rice as example,it shows that a pixel size of 1.2meter is suitable in the area such as Changzhou and *** top-priority range of VNIR should be the red edge of 670-780nm and fine-division is necessary with a suggestion of about 40 bands with 3nm *** in belts of 400-670 and *** and less bands are acceptable. According to the application of IARS and the linear properly of rice spectral,it was suggested that S/N in order of×10 is enough for plant recognition,but for species classification for a certain plant, it should be square with an order up to×10-×10

关键词： Hyperspectral imaging Hyperspectral sensors Data mining Plants (biology) Spatial resolution Belts Remote sensing Information technology signal resolution signal to noise ratio

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The High resolution Estimate-A Comparative Study

The High Resolution Estimate-A Comparative Study

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1999 International Conference on Computational Electromagnetics and Its Applications(ICCEA’99)

作者： Shahid Niaz Fang Dagang Sheng Wei Xing Ye Xiao Dong National University of Science ＆ Technology Pakistan Department of Electrical Engineering Nanjing University of Science ＆ Technology

ISBN: (纸本)0780358023

＜正＞High resolution signal parameter estimation is a significant problem in a wide range of applications particularly for radar imaging and computational *** this paper,we present a comprehensive study of few notable high resolution techniques for parameter estimation like MUSIC, Matrix Pencil（MP） and RELAX based upon numerical simulation and compare their estimation performance. The result shows that RELAX provides better estimates for closely spaced signals especially for low signal-to-noise ratio（SNR）.

关键词： signal resolution parameter estimation radar imaging radar resolution signal parameter estimation radar imaging computational electromagnetics high resolution techniques MUSIC matrix pencil method RELAX technique numerical simulation closely spaced signals low signal-to-noise ratio

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ENHANCING ANGULAR resolution IN NON-COHERENT RADAR IMAGERY

ENHANCING ANGULAR RESOLUTION IN NON-COHERENT RADAR IMAGERY

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1996 CIE International Conference of Radar(ICR’96)

作者： Firooz Sadjadi 3400 Highcrest Road Minneapolis MN 55418

＜正＞Imagery that are obtained by non-coherent radar sensors suffer from a multitude of quality degradations among which antenna induced poor angular resolution is one of the most troublesome. We present a new approach to beam sharpening that improves the apparent resolution of the radar sensor several times depending on the signal-to-noise *** technique consists of a compensating filter whose coefficients are obtained by minimizing the expected quadratic estimation *** nonlinear filter is then applied on sets of real 35 GHZ non-coherent radar imagery and its performance is *** of the implementation of the technique on real-time digital signal processing（DSP）hardware are also provided.

关键词： Image resolution Radar imaging Radar antennas signal resolution Digital signal processing Image sensors Degradation signal to noise ratio Filters Estimation error

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