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A STUDY OF REDUCED-RANK STAP

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Journal of Electronics(china) 2000年第4期17卷 289-296页

作者： Zhang Liang Bao Zheng Liao Guisheng (key Lab. for radar signal processing, xidan university, xi’an 710071, china)

This paper starts with the discussion of the principle of Reduced-Rank (RR) Space-Time Adaptive processing (STAP). It is followed by a dedication of the upper bound performance of all eigen-based RR methods provided by Cross Spectral Method (CSM) under the condition of a given processor rank and an identical secondary sample size. A performance comparison between two RR STAP processors with prefixed structure and CSM is performed by the means of simulations. It is shown that the performance of time pre-filtering followed by jointly localized STAP structure (i.e. 3DT-SAP) is very close to the upper bound and thereby it is an effective RR approach.

关键词： Airborne phased array radar Reduced-Rank STAP (RR STAP) Cross Spectral Method (CSM) Clutter suppression Detection performance

维普期刊数据库

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不同系统仿真平台上仿真模块移植方法研究

计算机工程与应用 2004年第26期40卷 95-97,205页

作者：周宇张林让西安电子科技大学雷达信号处理重点实验室西安710071

对雷达、通信等系统的仿真,需要考虑诸多因素,针对不同的要求,要选择不同的仿真平台。论文介绍了SPW和Simulink两平台上C语言程序各自的组织结构,找出了他们之间的相似处,并以大气衰减模块为例讲述如何将SPW上用户自建模块的C语言程序... 详细信息

对雷达、通信等系统的仿真,需要考虑诸多因素,针对不同的要求,要选择不同的仿真平台。论文介绍了SPW和Simulink两平台上C语言程序各自的组织结构,找出了他们之间的相似处,并以大气衰减模块为例讲述如何将SPW上用户自建模块的C语言程序经过简单变换,移植到Simulink上来。这一工作大大减少了在Simulink平台上开发仿真模型库的工作量,缩短了开发的周期。通过上述工作,研究了不同系统仿真平台上仿真模块的移植方法。

关键词： Simulink SPW 移植 C语言

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Imaging Study of High Squint SAR Based on FMCW

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Imaging Study of High Squint SAR Based on FMCW

2007 Asian and Pacific Conference on Synthetic Aperture radar(APSAR 2007)

作者： Liang Yi Wang Hongxian xing Mengdao Bao Zheng national key Lab. of radar signal processing xidian university xi’an P.R.china

This paper establishes the model of high squint FMCW SAR received signal,analyzes its characteristics,and posts the Doppler frequency shift effect induced by the continuous motion in range direction while radar transmitting and receiving signal. Meanwhile,this paper proposes a Modified RD Algorithm （RDA） aimed at high squint FMCW SAR dechirp-on-receive data,which compensates for range walk in the time domain,Doppler frequency shift and range curve in the frequency domain. Point target simulation verifies the analysis and validity of the proposed algorithm. In addition,for the Doppler frequency shift induced by the continuous motion while radar transmitting and receiving signal,this paper also analyses its effect on image.

关键词： high squint FMCW SAR Doppler frequency shift Modified-RDA

Optimizing and Implementing the Fast Algorithm for Real Time SAR Imaging

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Optimizing and Implementing the Fast Algorithm for Real Time...

2006 CIE International Conference on radar

作者： Tao Su 1 Xuehui He 1 Shunjun Wu 1 1 national key Lab.for radar signal processing xidian university xi’an 710071 china

A fast correlation algorithm in SAR imaging is presented to lower down the computation burden of range compression and azimuth focusing *** is based on the decomposition method of *** order to minimize the computation amount,the relationship of number of padding zeroes and the decomposition scheme to computation complexity is investigated,which is dependent on the number of correlation filter coefficient *** for different numbers of correlation filter coefficient taps,the number of padding zeroes and decomposition scheme are *** algorithm is superior in computational efficiency compared with other *** is applied to real time SAR imaging and proved to be effective in computation.

关键词： decomposition optimizing

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MUSIC及其改进算法的DOA估计

陕西师范大学学报（自然科学版） 2008年第S1期36卷 155-157页

作者：高斌王俊张辉西安电子科技大学雷达信号处理国家重点实验室陕西西安710071

MUSIC算法是一种有效的DOA(Direction of arrival)估计方法,但它仅能估计非相关信源,不能估计相关信源。前后向空间平滑技术(Forward/Backward Spatial Smoothing Technique)是一种改进的MUSIC算法,对相关信源有很高的分辨率。分析了它... 详细信息

MUSIC算法是一种有效的DOA(Direction of arrival)估计方法,但它仅能估计非相关信源,不能估计相关信源。前后向空间平滑技术(Forward/Backward Spatial Smoothing Technique)是一种改进的MUSIC算法,对相关信源有很高的分辨率。分析了它的基本原理及优缺点,仿真了它的分辨性能。

关键词： MUSIC 前/后向平滑技术 DOA

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Study on Imaging Algorithm for Missile-Borne Side-looking SAR

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Study on Imaging Algorithm for Missile-Borne Side-looking SA...

2007 Asian and Pacific Conference on Synthetic Aperture radar(APSAR 2007)

作者： YI Yu-sheng ZHANG Lin-rang LIU xin LIU Nan SHEN Dong national key Lab for radar signal processing xidian university xi’an Shaanxi china

A SAR image problem for missile-borne based on the platform anomaly movement is discussed in this paper. In this paper,a approximate illumination geometry has been defined and a new image model is presented. Image formation from missile-borne synthetic aperture radar （SAR） is limited by image degradations caused by missile’s non-level straight line movement. In this paper we assume that the missile is uniformity and beeline motion in a synthetic aperture time due to the missile’s high speed. A different reference range is adopted to cope with the range-dependent secondary range compression （SRC） to different synthetic aperture. By this approach,the SRC error can be reduced effectively. Finally,simulation results verify the correctness and validity of the proposed methods.

关键词： missile borne frequency scaling algorithm synthetic aperture radar

A novel method for the improvement of power efficiency in high peak-to-average-power ratio communication systems

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Science china(Information Sciences) 2010年第8期53卷 1697-1702页

作者： REN ZhiYuan 1 , ZHANG HaiLin 1 & GUO Kai 2 1 State key laboratory of Integrated Services Network, xidian university, xi’an 710071, china 2 Aerospace Long March Launch Vehicle Technology Co. Ltd., Beijing 100076, china 1. State key laboratory of Integrated Services Network Xidian University Xi’an 710071 China2. Aerospace Long March Launch Vehicle Technology Co. Ltd. Beijing 100076 China

To solve the problem of low power efficiency of power amplifiers (PA) in the high peak-to-averagepower ratio (PAPR) communication system, a novel signal decomposed amplifier structure has been proposed in order to decrease the energy consumption and increase the power efficiency of PA. The high PAPR signal can be decomposed into several low PAPR branch signals, linearized and amplified in parallel. This structure can reduce the PAPR of branch signals and improve the power efficiency of PA. The simulation results indicate that the power efficiency will be remarkably increased.

关键词： Green Radio power amplifier signal decomposed

A MULTIUSER DETECTOR BASED ON BLIND signal SEPARATION

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A MULTIUSER DETECTOR BASED ON BLIND SIGNAL SEPARATION

2003 International Conference on Communication Technology

作者： Jianfeng CHEN xiaolong ZHU xianda ZHANG key Lab for radar signal processing xidian university xi’an 710071 china Department of Automation Tsinghua university Beijing 100084 china

Conventional RAKE receiver dis- tinguishes each user by crosscorrelation of the spread sequences and achieves detection of the desired user. In practical applications, however, the performance of rece

关键词： multi-user detection blind sig- nal separation DS-CDMA

A New Approach to Improve Coherence in SAR/GMTI processing of Distributed Microsatellites Systems

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A New Approach to Improve Coherence in SAR/GMTI Processing o...

2006 CIE International Conference on radar

作者： Zhenhua Zhang Tong Wang Jinshan Ding Zheng Bao key Lab for radar signal processing xidian university xi’an P.R.china 710071

In order to improve the capability of clutter cancellation in bistatic SAR/GMTI processing,a new method to improve coherence between two sets of echoes from two receivers is developed based on the distributed microsatellites system with the constellation of *** to the idea of equivalent mono-static,the coherence improvement can be achieved by match filter to the spectra of equivalent squint angle,*** bistatic *** this way,the decorrelation component induced by the along-track baseline is *** of Doppler equals to equivalent radial wave multiplied by equivalent squint angle spectra,this method can be realized in two steps,as the first step the compensation of equivalent radial wave number error is achieved through range spectra cut and shift of the narrow band *** the second step,the Doppler spectra not overlapped should be removed,by which the bistatic bisector can be *** results show the decorrelation components introduced by the along-track baseline can be fully eliminated using this method.

关键词： Bistatic SAR GMTI Coherence