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相干     
相关语句
  coherent
    Research of Key Technologies in Phase Coherent Underwater High Speed Communication
    相位相干高速水下通信的关键技术研究
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    Performance Research on the Coherent and Noncoherent Space-time Code
    相干和非相干空时码的性能研究
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    THE JOINT ESTIMATION OF MESSAGE AND CHANNEL PROCESSES IN COHERENT COMMUNICATION
    相干通信中消息和信道过程的联合估计
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    Phase Coherent Frequency-hopped Waveform Synthesis by Using the SAW Chirp Transform
    SAW Chirp变换综合相干捷变频信号
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    Effect of Laser Noise on Receiver Performance of Coherent Fiber-Optic Communication Systems
    激光源噪声对光纤相干通信接收机性能的影响
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  coherence
    Application of the Partial Coherence Function on the Noise Identification of Cars
    偏相干法在识别轿车噪声源中的应用
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    DTS Coherence Acoustic Encoding
    DTS相干声学编码
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    A Detection Method of Coherence Average for Weak Signalwithout Synchronous Signal
    不用同步信号的相干平均弱信号检测法
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    Distance Measurement of a Target with CO_2 Coherence Imaging Lidar of Short Pulse
    窄脉冲CO_2相干激光成像雷达目标距离测量研究
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    Weakness Signal Detection based on Coherence Accumulation of Wavelet Transform
    基于小波变换相干积累的微弱信号检测
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  coherency
    Estimation of source coherency structure (SCS) for uniform circular array
    基于均匀圆阵的信源相干结构的估计
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    The SRP is the key to estimate the source coherency structure and total signal number.
    本文论述了利用平滑秩图可估计出信源的相干结构。
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    In this paper it is shown that the practical performance of a SLC system depends on the coherency but not the statistical dependency between mainand auxill ry signals.
    本文论证了自适应天线旁瓣对消器(SLC)的对消性能取决于主、辅天线信号或干扰及有用信号的相干特性,而和统计相关性无直接关系。
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    In this paper, the relationship between SAR resolution and coherency of radar targets is analysed in detail, and the separable probability is presented as a parameter to assess the SAR resolution.
    本文通过数学分析,将相干目标的分布模型与图象的可分辨条件结合在一起,提出了与目标特性相关的雷达图象分辨力评定标准——可分辨概率,并针对不确定目标的特性提出了平均可分辨概率的概念。
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    A mathematical relationship between the degree of polarization(DOP) and the differential group delay(DGD) was derived based on the assumption of a quasi-monochromatic wave for light in fibres and 2×2 coherency matrix. A correlation function was proposed to represent the degree of overlapping between optical signals in each of principal state of polarization(PSP).
    根据准单色光理论和2×2相干矩阵,推导了在偏振模色散(PMD)补偿技术中作为反馈控制信息的光偏振度(DOP)与光脉冲波形数、脉冲宽度、光在2个偏振主态(PSP)上分光比以及差分群延迟(DGD)之间的一般数学关系。
短句来源
  coherently
    Back-Projection (BP) algorithm based on time-domain processing, can attain high-resolution SAR image by calculating the two-way propagation delay time and coherently summing up the corresponding signals.
    后向投影 (Back Projection ,BP)算法是一种基于时域处理的成像算法 ,通过计算双程延时将对应信号进行相干累加 ,获得高分辨率SAR图像。
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    Estimating Direction of Arrival for Coherently Distributed Sources in Noise
    一种相干信号源分布式目标波达方向估计方法
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    Approach for 1-Dimensional Direction of Arrival estimation of Coherently Distributed Sources in Noise
    相干分布式目标一维波达方向估计方法
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    5) Based on the noise model with a Centro-Hermitian covariance matrix, a differential denoising bearing estimator is developed for coherently distributed sources in unknown noise fields. Its accuracy and resolution performance is analyzed theoretically and numerically.
    5) 针对未知噪声环境中相干分布源的方向估计问题,提出了一种差分去噪估计器,并从理论和数值结果两个方面评价了它的精度和分辨率性能。
短句来源
    To solve this contradiction we introduce the polarization track restriction and calculate the biggest SCR(ratio of signal to clutter) of coherently and incoherently reflected waves.
    为了解决这一矛盾引入了极化轨道约束条件,计算了在极化轨道约束下相干情况和非相干情况下共极化通道最大接收功率与极化状态的关系。 并推导和计算了在极化轨道约束下共极化通道的最大信杂比。
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      coherent
    Discrete Frames of Poincaré Coherent States in 1+3 Dimensions
          
    Continuous frames of coherent states of the Poincaré group in 1+3
          
    Generalized Maximum Likelihood Algorithm for Direction-of-Arrival Estimation of Coherent Sources
          
    It is flexible in the sense that the arriving sources may be a mixture of multiclusters of coherent sources, the array geometry is unrestricted, and the number of sources resolved can be larger than the number of sensors.
          
    It is concluded that the performance of the GML algorithm coincides with that of the DML algorithm in the incoherent sources' case, while it improves greatly in the coherent source case.
          
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      coherence
    Based on electromagnetic theory, a computing model of the Talbot interferometer is established with the temporal and the spatial coherence taken into account and with the turning angle of the reflectors as a critical parameter.
          
    To accurately represent the piezoresistive properties of RTD, the current-voltage characteristic coherence of the same RTD was tested.
          
    Compared with the results of the finite element software SAMCEF, the numerical simulation results show the good coherence and advantages of the analysis method.
          
    The first feedback strategy can effectively acquire information, but it destroys the coherence in feedback loop.
          
    On the contrary, coherent quantum feedback does not destroy the coherence, but the capability of information acquisition is limited.
          
    更多          
      coherency
    The influence of a temporal and spatial coherency of the radiation field on the photomultiplier count statistics is studied.
          
    At relatively large q⊥, no attenuation effect is found, but the coherency condition is shown to pose stringent constraint on the increase in the transition rate with growing L.
          
    If interacting stochastic oscillators are weakly detuned, the phase coherency of the attractors persists when phase synchronization breaks.
          
    The X-ray radiation passage through randomly arranged narrow (submicron) channels in a solid was studied by the method of numerical modeling taking into account the diffraction and reduced coherency effects.
          
    This paper analyzes cache coherency mechanism from the view of system.
          
    更多          
      coherently
    Quantum dynamics of tight-binding networks coherently controlled by external fields
          
    A differential pursuit game for a group of true and false targets, in which coherently acting targets maximize the minimal distance between the pursuer and true target, is studied.
          
    It is shown that, in the case of fourfold-coordinated structures, crystalline and quasicrystalline fragments can intergrow coherently (without dangling bonds).
          
    With the use of high-resolution electron microscopy, it was found that η-Al2O3 particles exhibited the most developed {111} face and consisted of coherently joined domains with a pronounced platelet shape.
          
    These data suggest that the hr gene acts in epidermal cells of a hair follicle, because epidermal cell clones in embryonic skin migrate in the lateral-ventral direction coherently and without mixing.
          
    更多          


    In demodulation type transponder the demodulated baseband signal accompanied by noise is used for further modulation and retransmission. The relationships between the retransmitted noise and system parameters are analysed for three cases, i.e. coherent demodulation in linear channel, coherent demodulation with pre-limiter and frequency discrimination demodulation. The theoretical analysis has been confirmed by experiments. Results of, this article can be used for radio system design of orbit determination and...

    In demodulation type transponder the demodulated baseband signal accompanied by noise is used for further modulation and retransmission. The relationships between the retransmitted noise and system parameters are analysed for three cases, i.e. coherent demodulation in linear channel, coherent demodulation with pre-limiter and frequency discrimination demodulation. The theoretical analysis has been confirmed by experiments. Results of, this article can be used for radio system design of orbit determination and data transmission.

    在解调型应答机中,解调的基带信号和伴随的噪声一起再调制和转发。本文针对线性通道中相干解调、有预限幅的相干解调和鉴频解调三种情况,分析了转发噪声与系统参数的关系。理论分析已为实验所证实。本文结果可用于无线电测轨或数据传输系统的设计。

    A generalized relationship for calculating the ambiguity function of the radar signals is derived, which can be used to calculate any complex signal by layer-by-layer repetition and multiple modulations. A linear FM rectangular envelope sub-pulse is taken as an example of the component signal. The relationship derived is widely applicable in many cases, such as a single pulse and the coherent pulse trains, linear FM in the pulse duration, frequency and phase shift coding of the contiguous sub-pulses, staggering...

    A generalized relationship for calculating the ambiguity function of the radar signals is derived, which can be used to calculate any complex signal by layer-by-layer repetition and multiple modulations. A linear FM rectangular envelope sub-pulse is taken as an example of the component signal. The relationship derived is widely applicable in many cases, such as a single pulse and the coherent pulse trains, linear FM in the pulse duration, frequency and phase shift coding of the contiguous sub-pulses, staggering the repetition period and interpulse frequency shift, complex weighting of the pulse trains and so on.An ALGOL program and its practical application was given by author in another paper.

    本文导出了一个计算雷达信号模糊函数的通用关系式,它可用于对任意一个“单元信号”进行多重周期重复与多种调制的复杂信号的计算。文中结合实际条件导出了单元信号为“矩形包络子脉冲”时的工程计算关系式。它们的适用范围很广,例如,单个矩形脉冲或多个相干脉冲串,脉冲持续期内的线性调频,相邻矩形子脉冲的频率和相位编码调制,脉间跳频和重复周期参差以及复数振幅加权等常用信号;也能用于被重复的信号为线性调频、频率和相位编码的连续调制信号。作者在另一文章中,给出了用来计算模糊函数的程序框图和用ALGOL语言编写的全部程序及实例。

    In this paper the response to clutter of receiver fiter is set up by meansof the Woodward ambiguity function. According to volume invariance ofthe ambiguitg function, weighting processing and. optimum filter designing ofcoherent pulse trains is discussed for a given distribution of clutter. Thisprocessing method provides a effective suppression of clutter.

    本文用Woodward模糊函数,确定了接收机滤波器对杂波的响应,根据模糊函数的体积不变性,讨论了相干脉冲串,在已知杂波环境中的加权处理和最佳滤波器的设计,从而达到对杂波的有效抑制。

     
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