The probability of multi-photon pulse in weak coherent source can be decreased by canceling two photon pulses to improve the security distance. 通过削除弱相干光源中的两光子脉冲,降低多光子脉冲的影响,从而提高安全通信距离。
A uniform coherent light source, a filter and a receiving screen are designed in computer. 在计算机上模拟一个均匀相干光源、个滤波器和一个接收屏。
Finally, experiments are done by using a red high brightness LED to be the partial coherent light source. 最后,用红色高亮LED作为准单色光源进行了验证实验。
Using a particle swarm optimization algorithm and generalized maximum likelihood algorithm, a novel method to estimate direction-of-arrival ( DOA) of a coherent source is proposed. 利用粒子群优化算法和在解决优化问题的优势和广义极大似然测向的优点,提出了一种估计相干信源波达方向的新方法。
Optical parametric oscillator ( OPO) has widely tunable range, high efficiency, simple structure and high reliability. It's one of the most important ways to get widely tunable and highly coherent radiate source, and the new wave band laser systems. 光参量振荡器由于具有调谐范围宽、效率高、结构简单、工作可靠等特点,是获得宽带可调谐、高相干辐射光源和新波段激光系统的重要途径。
Estimating direction-of-arrival of coherent source based on particle swarm optimization algorithm 基于粒子群优化算法的相干信源波达方向估计
This paper presents a new method for estimating two-dimensional ( 2-D) direction-of-arrival ( DOA) in coherent source environment with a special array. 基于特殊天线阵列,提出了一种有相干源存在情况下的二维波达方向(DOA)估计的新方法。
New method of 2-D direction-of-arrival estimation in coherent source environment with special array 基于特殊阵列的相干信源二维测向新方法
Study on new method of 2-D direction-of-arrival estimation of coherent source 二维相干信源测向新方法研究
To reduce the computational complexity greatly, the correlation algorithm is proposed for the coherent distributed source parameters estimation using the special geometry structure of signal receiving antenna array, and the ambiguity of DOA estimation is also analyzed. 该文提出了基于天线阵列的特殊结构,采用阵列之间互相关算法对相干分布式信号源的各项参数进行估计,极大地减小了运算量,同时分析了信号源到达方向的模糊性问题。
Best frequency relation is given between IF coherent oscillating source and clock frequency of full coherent radar. 给出了全相参雷达频率源的中频相干振荡源及时钟频率之间的最佳频率关系。
Optical heterodyne technology is widely used in radio over fiber system in generating millimeter waves because of its low price and simple structure, but center stations generally use coherent source to eliminate phase noise. 在光纤无线电技术中,通过光外差产生毫米波具有结构简单、成本低的特点,但中心站一般需要使用相干光源。
Using ESPRIT Algorithm to Estimate the DOA of Coherent Source via Virtual Array Transformation 虚拟阵列变换法解相干信号ESPRIT算法研究
An unmodulated stable laser system, which has been used as a tunable CO_2 laser sideband coherent source, is introduced. 本文介绍用于可调谐CO2激光边带相干光源的稳频激光系统。
The generalized expression for the phase-space product Q of a beam generated from a partially coherent source is presented by using coherent-mode representation of partially coherent beams. 根据部分相干光的相干模表示法,推导了由部分相干光源所产生光束的相位一空间积Q。
DOA estimation of wide-band coherent source based on modified propagator method 基于修正传播算子的宽带相干源DOA估计
Coherent source is used to focus radiation energy in the shallow stratified medium. 而在浅海分层介质中,能量集中辐射自然是与浅海传播算子相匹配的相干辐射。
A wide-band fiber-optic Raman coherent source modulated with a weak signal light 一种用弱信号光调制的宽带光纤拉曼相干光源
The spatial sequence correlation technique for direction& finding of coherent signal source 对相干信号源测向的空间序列相关技术
The later as a coherent source of radiation is of high value in applications because it is within the wavelength region where the coherent radiation source is lacked. 由于这种辐射位于相干辐射的珍稀或空白区,因而具有极高的应用价值。
This paper theoretically analyzes new semiconductor devices, which can generate a very narrow pulse and get very high peak power. A coherent signal source with high power ultra-wide band may be achieved by using the devices. 对能够产生极窄脉冲、高功率的半导体器件进行理论研究和分析,并在此半导体器件的基础上组成大功率超宽谱脉冲相干信号源。
2-D DOA Estimates for Coherent Source Based on Weighted Subspace Fitting 加权子空间拟合相干信源二维波达方向估计
Theory of X Ray in Line Gabor Holography with Partial Coherent Source 部分相干光的X射线同轴伽柏全息理论
Structure of image fields in an aplanatic optical system with coherent point source illumination 相干点源照明时消球差光学系统的像场结构
The BER can be significantly reduced by means of using a partially coherent source beam, so the performance is improved. 采用部分相干光作为激光光源,可以减小系统误码率,提高系统性能。
By virtue of broadening the spectrum of laser output wavelength, the optical parametric generator as a tunable and coherent light source, has been widely used in the fields of spectroscopy, medicine, scientific research, and military affairs. 光学参量发生器作为可调谐相干光源,拓宽了激光输出波长范围,在光谱学、医学、科学研究、军事等领域获得了广泛应用。
Multi-wavelength light source that generated by the concatenated modulator is a promising coherent light source technology in the future Tbit/ s optical communication. 表明级联调制器产生的多波长光源在未来的Tbit/s光通信中是一项很有前景相干光源技术。
Optic Talbot effect requires two necessary conditions, namely the coherent light source and a periodic structure. 实现光的塔尔伯特效应需要两个必要的条件,即相干光源和周期结构。
SLD is a low coherent optical source, its total intensity equals to the summation or the integral of every wavelength intensity component. SLD是低相干光源,其总光强可以通过对每个单一波长的光强求和或者积分求出。
The performance of Wireless Optical Communication systems improved by using a partially coherent source beam, more apertures transmitted technique and the subcarrier modulation technique is calculated. 利用部分相干光,结合多发射技术和副载波调制技术对无线光通信系统性能的改善进行了数值分析。