Pulse compression; Linear frequency modulated signal; Phase encoding signal; Echo signal; ADS; 脉冲压缩;线性调频信号;相位编码信号;目标回波信号;ADS;
Image Encryption Based on Phase Encoding and Fractional Fourier Transform 基于相位编码及分数傅立叶变换的光学加密
In computer science, this is called phase encoding. 在计算机科学中,这被称作数据库。
Study on Encryption and Anti-counterfeiting Technique Based on Random Phase Encoding Algorithm 基于随机相位编码的加密与防伪技术研究
Color image encryption technique based on double random phase encoding 基于双随机相位的彩色图像加密隐藏技术
Research on Side-lobe Suppression for Phase Encoding Signal 相位编码信号脉冲压缩旁瓣抑制技术研究
Based on image hiding and double-random phase encoding techniques, a method for transmitting data secretly is presented. 提出了一种利用不对称分数傅里叶变换和双随机相位编码对图像加密的方法。
Statistical Analysis of MAI in Spectral Phase Encoding OCDMA System 频谱相位编码OCDMA系统中多址干扰的统计分析
A new method for the prestack depth migration of the areal shot records with phase encoding is presented. 提出一种新的面炮记录相位编码叠前深度偏移方法。
A new OCDM technology of QPSK coherent phase encoding in time domain QPSK时域相干相位编码的OCDM新技术
The forward iterative algorithm in random phase encoding for optical security 随机相位光学防伪中的前向迭代算法
The double-random phase encoding and decoding operation is an important method for image hiding. 双随机位相编码解码技术是应用于图像隐藏领域的一种重要方法。
Envelope Behavior of Multiple-Access Interference in Spectral Phase Encoding OCDMA Systems 频谱相位编码光码分多址系统中多址干扰的包络特性
In Chapter 4, two signals derived from the Binary Pseudo random sequences phase encoding signal are discussed. 在第四章提出了两种从伪随机二相编码信号衍生出的信号:脉间二元码相位调制信号和随机多元码脉位调制和脉间二相码调制混合信号。
In a spectral phase encoding optical code division multiple access ( SPE OCDMA) system, the envelope behavior of multi access interference ( MAI) directly affects the bit error rate of the system. 在频谱相位编码光码分多址系统中,多址干扰(MAI)的包络特性将直接影响系统误码率公式的推导。
A new encrypted in-line holographic watermarking technique is proposed based on double-random phase encoding method, holography and digital watermarking. 在研究数字全息技术的基础上,提出了一种新的加密的同轴全息数字水印方法。
In this paper, image is Fresnel transformed and Fractional Fourier transformed successively, and phase encoding is implemented in both Fresnel domain and Fractional Fourier domain. 该方法对图像分别进行一次菲涅耳变换和分数傅里叶变换,并在图像的菲涅耳域和分数傅里叶域上分别利用随机相位版施行相位编码。
A diffraction selectivity theoretical analysis method of volume gratings with wave front phase encoding is proposed. 论文给出了分析随机波前相位编码体光栅选择性衍射的一种方法。
And another Fractional Fourier Transform accomplishes the hiding after adding the phase encoding. 通过相位编码后,对谱平面进行另一次分数傅立叶变换,实现图像的第二重隐藏。
The real part and imagine part of double-random phase encoded data is hided simultaneously in a large host image through the method of gray level superposition based on double-random phase encoding technique. 利用具有高度保密性的双随机位相编码技术,通过灰度迭加方法将编码信息的实部和虚部同时隐藏在一幅足够大的宿主图像中。
According to the Program, a new OCDM technology of QPSK coherent phase encoding in time domain is considered to be studied. 结合项目实际情况,提出了基于QPSK的双极性时域相干OCDM新技术。
Sidelobe suppression has been a key issue during processing of the phase encoding signals. 旁瓣抑制问题一直是相位编码信号处理中一个关键性的问题。
In this thesis, three methods of optical image encryption is studied in theory and numerically simulated. They are algorithms based on the anamorphic fractional Fourier Transform ( AFRFT), double random phase encoding technique and iterative encryption algorithm, respectively. 本文分别在变形分数傅里叶变换、双随机相位编码技术、迭代加密运算的基础上,研究了三种图像加密方法,并且对这些加密方法进行了理论分析和数值模拟。
Photoelectric encryption system based on the random phase encoding technology, for its outstanding security characteristic it has got more and more extensive attention. 而光电加密系统以随机相位编码技术为基础,在安全性和可靠性上有非常突出的优点,受到了各个领域的广泛关注。
Based on the highly nonlinear optical fiber and semiconductor optical amplifier, all-optical combinational logic devices, such as the data selector and distributor, as well as logic signal processing technologies based on phase encoding data have been proposed and researched. 本论文基于高非线性光纤、半导体光放大器等高非线性器件,研究了数据选择器、数据分配器等全光组合逻辑器件的实现以及基于相位编码数据的逻辑信号处理技术。
Phase encoding and fractional Fourier encoding techniques have received increasing attention at home and abroad for their high security and more keys. 在这些研究中,相位编码及分数傅里叶编码分别以其较高的安全性和多密钥性,受到了国内外学者的广泛关注。
Software includes the measurement of conventional pulse, LFM pulse, phase encoding parameters and PRI de-interleaving. 软件包括常规脉冲、线性调频脉冲、相位编码等雷达参数的测量、分析和PRI分选等主要模块。
A multiple-image encryption method based on FRFT and phase encoding has been studied. 基于分数傅里叶变换和相位编码技术研究了多幅图像的加密。
The parallel MRSI applies multiple coil array for parallel data acquisition, which reduce the acquisition time by reduce the phase encoding steps in one or two directions in space. 新近出现的并行MRSI技术采用多个接收线圈阵列同时采集数据,在保持空间分辨率不衰减的情况下,从一个或两个空间方向减少相位编码步数,大大减少了扫描时间。
In pulse compression signals, linear FM signal and phase encoding signal are used widely. Now, we only research phase encoding signal in this dissertation. 目前应用较多的脉冲压缩信号主要有线性调频信号与相位编码信号,本文只对相位编码信号进行研究。