frFT相关论文
静止地球轨道双基地合成孔径雷达（Geostationary orbit Bistatic Synthetic Aperture Radar,Geo-BSAR）系统是一种特殊构型的被动式双......
雷达回波信号常用来进行目标识别,但在实际环境中,接收到的往往是多种信号分量混杂在一起后的信号,并且其为非平稳信号。针对这种......
An analytical expression for a Lorentz-Gauss vortex beam passing through a fractional Fourier transform (FRFT) system is......
For multiple-input multiple-output(MIMO)orthogonal frequency division multiplexing(OFDM)systems, a joint timing synchron......
This paper introduces Lorentz beams to describe certain laser sources that produce highly divergent fields.The fractiona......
线性调频(linear frequency modulated,LFM)信号是一类重要时变信号,在雷达目标探测、声纳、地震勘探和通信对抗等方面有广泛应用,......
线性调频信号(chirp, LFM)信号广泛应用于通信、雷达、地震和声纳等信息系统中。在这类系统中,LFM信号的检测与参数估计一直是一个......
水下信号处理技术是开发维护海洋必不可少的技术手段,波达方位估计作为水下信号处理的重要分支,一直都是热门研究课题。传统的DOA......
本文根据课题组“XXX雷达信察分析系统”型号项目与国家自然科学基金项目“基于XXXX雷达的无源探测系统微弱目标检测技术研究”中......
Detection Algorithm for LFM Echo of Underwater Moving Targets Based on Discrete Fractional Fourier T
The mismatch between echo and replica caused by underwater moving target(UMT)’s radial velocity degrades the detection ......
The model of linear frequency modulation continuous wave(LFMCW)applied in underwater detection and the method for the de......
本文利用分数阶傅里叶变换(FrFT)的时频旋转性,设计基于广义时间带宽积准则的最优窗函数,从而实现自适应分数域最优Gabor变换,达到......
The aim of this paper is to propose a novel technique for the detection of multicomponent chirp signal and the parameter......
The Linear Frequency-Modulated signal (LFM) has been used widely in radar signals. Using the characteristics of the line......
This paper presents a new method for the detection and parameter estimation of multicomponent LFM signals based on the f......
As generalization of the fractional Fourier transform (FRFT), the linear canonical transform (LCT) has been used in seve......
The fractional Fourier transform is a generalization of the classical Fourier transform, which is introduced from the ma......
The sampling rate conversion is always used in order to decrease computational amount and storage load in a system. The ......
In order to extract target radial acceleration from radar echo signal at low SNR (signal-to-noise), this paper employed ......
As the fractional Fourier transform has attracted a considerable amount of attention in the area of optics and signal pr......
Oversampling is widely used in practical applications of digital signal processing. As the fractional Fourier transform ......
提出了一种相干宽带线性调频(LFM)信号的波达方向(DOA)估计新方法.该方法利用LFM信号在分数阶Fourier域上的解线调特性,构造出新的......
The paper reveals the relationship between the weighting coefficients and weighted functions via the research of coeffic......
As a generalization of the Fourier transform (FT), the fractional Fourier transform (FRFT) has many applications in the ......
The realization of the parameter estimation of chirp signals using the fractional Fourier transform (FRFT) is based on t......
目标运动使雷达回波表现为初始频率和调频率参数均为未知的线性调频(LFM)信号,精确且快速地检测和估计出未知参数的LFM信号是雷达......
The wavelet transform (WT) and the fractional Fourier transform (FRFT) are powerful tools for many applications in the f......
The paper reveals the time-frequency symmetric property of the weighted-type fractional Fourier transform (WFRFT) by inv......
Resolution and parameters estimations for multiple maneuvering targets in the same range cell is addressed in this work.......
针对建立在快速傅里叶变换(FFT)的基础上只在频域之中作变换的传统MIMOTDCS,抗线性调频干扰(LFM)信号能力弱,无法对其有效地应对和......
在高空接收从海上发射的雷达信号时,由于海面的反射作用,信号将会出现多径效应。多径效应会造成信号的衰落,导致信号检测性能和参......
在信号处理领域中遇到的许多信号都是非平稳信号,如通信信号、某些雷达信号、地震波、声纳等。传统的Fourier分析方法和理论使用的......
An algorithm to detect and recognize interferences embedded in a direct sequence spread spectrum (DSSS) communication sy......
复杂运动目标的转动分量多数情况下可近似为匀加速转动,散射点多普勒回波可以近似为LFM信号,经传统RD算法的DFT方位压缩后,散射点......
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
基于分数阶傅里叶变换(FRFT)域的分形特征研究压制干扰的存在性检测问题。首先,分析了典型的三种压制干扰的分形特征,说明了典型压......
The concise fractional Fourier transform and its application in detection and parameter estimation o
A concise fractional Fourier transform(CFRFT) is proposed to detect the linear frequency-modulated(LFM) signal with low ......
伪随机脉位调制与伪码调相复合体制引信（PRPPM-PRBC）是现代无线电引信重点研究方向之一,对该体制引信的抗干扰性能和抗干扰方法的研......
为恢复模糊图象的一种技术源于透镜散焦在这篇论文被建议，它基于部分 Fourier 变换(FRFT ) 。作为为变化时间的信号的分析的一个强......
结合分数Fourier变换和盲源分离,提出了一种基于分数Fourier变换的机械故障源盲分离方法,试验结果表明,该方法能有效地分离具有不......
作者通过把FrFT角看成一种资源进行优化选取，并在OFDM蜂窝系统内进行复用，实现了小区内不同子信道上调制基函数的相互正交性，以及相邻......
针对FRFT-TDCS应对多分量LFM干扰信号时的变换阶次选择问题,提出了一种以寻求最大可用带宽为标准的FRFT-TDCS最优阶次选择算法。首......
本文分析了运动目标对SAR成像的影响．首先，建立了三通道SAR对多个运动目标检测的模型，该模型利用DPCA技术进行动目标检测；然后提取检测......
给出了一种基于子带分解并在子带中应用分数阶傅里叶变换（FRFT）的语音增强新方法.该方法把带噪语音信号分解成子带信号后,对子带信号......
文章提出了一种直扩系统（DSSS）中抑制多分量线性调频干扰（LFM）的方法。首先利用DCFT（Discrete Chirp-Fourier Transform）对接收信号进行......
数字水印技术已成为为信息安全和版权保护的一种有效方法。数字水印一般要满足不可见性和鲁棒性，这就要求要有一个合适的水印嵌入强......
通过分析LFM（线性频率调制信号）的时频分布，Wigner—Ville分布，Wigner—Hough分布，并结合FRFT（分数阶Fourier变换）与上述时频分布的关系，得......
