Their noise modulated to a concerted menacing growl punctuated by sharp yaps.
它们的喧闹声逐渐变为整齐划一的、带有威胁性的吼叫，还夹杂着刺耳的狂吠。
The random binary phase code phasing PD fuze is a novel modulated system of noise.
随机二相码调相PD（脉冲多普勒）引信，是一种较为新颖的噪声调制引信体制。
These characteristics of spectral correlation can be used to classify modulated signals, even when the signals are buried in noise.
利用谱相关函数的这些性质可以识别出噪声中的调制信号。
The known actual measured noise characteristic data of CFAs are reviewed, and the usefulness of pulse-modulated CFAs in pulsed Doppler radars are discussed in this paper.
本文回顾了已知的正交场放大管（CFA）噪声性能的实际测量数据，并且讨论了脉冲调制的CFA在脉冲多普勒雷达中的有用特性。
The result indicates that the method is an effective way to extract the modulated information from radiated noise.
结果表明，该方法用于噪声中调制信息检测是一种有效的手段。
A method for extracting modulated information from radiated noise was discussed.
讨论了一种从辐射噪声中提取调制信息的联合方法。
Based on real-time estimation of noise matrix and grey clustering of state variable, filter or gain matrix is modulated so as to get an estimation of the state vector.
实时估计出系统噪声方差矩阵和量测噪声方差矩阵，对状态变量进行灰色聚类，并对滤波矩阵和增益矩阵进行实时自适应调整，计算出状态向量的递推估计值。
The phenomena of stochastic resonance of an over-damped second-order linear system with modulated dichotomous noise are investigated.
研究了系统固有频率受二值噪声扰动时，调制二值噪声驱动二阶过阻尼线性系统的随机共振现象。
In this paper, the soundex using laser bean modulated in intensity is advanced to suppress the atmospheric noise.
本文提出了抑制大气噪声的强度调制激光束探测法。
Adopting this technique, the spectrum quality of modulated noise may be approached to the fullest extent of the directly amplified narrow white noise.
采用该技术使调制后的窄带噪声谱质量在最大程度上逼近直放式窄带白噪声。
The spread spectrum (SS) signal is modulated by high-rate pseudo noise code, and belongs to typically periodic signal.
被高速伪随机码调制的扩频信号，其伪随机码是具有随机编码信号特征的周期信号。
The infrared gas sensor contains an open-path gas chamber, a high SNR (signal to noise ratio) infrared detector, and an electrical modulated MEMS infrared emitter.
红外气体传感器采用开放式气室，选用高信噪比的探测器和电调制的MEMS红外光源。
The problem of estimating the parameter of a linear frequency modulated signal embedded in additive noise is considered.
研究了加性噪声中线性调频信号的参数估计问题。
The Sine wave Pulse Width Modulation (SPWM) is used to reduce the wastage and the noise of the motor more effectively, as comparing to the equal pulse width modulated PWM.
相对于等宽脉宽调制PWM，正弦波脉宽调制SPWM可以有效地降低电动机的损耗和噪声。
Using the characteristics of phased modulated signal , higher output Signal to Interference plus Noise Ratio is obtained for a fixed transmitter by transmitting more energy.
该方法充分发挥了雷达发射机的发射能力，即对于固定的发射机来说，以发射更大的能量来得到更大的输出信干噪比。
In this spectroscopy, both laser frequency and Zeeman effect of a sample are modulated, and then the signal with high signal to noise will be obtained by double demodulation.
它同时对激光频率和样品的塞曼效应进行调制，然后通过双解调来提取微弱的光谱信号。
This paper introduces the influences of phase noise to radar systems. The measurement of phase noise in pulse modulated carrier is one of the most important techniques.
介绍了相位噪声对雷达系统的影响，这是毫米波精密制导技术的关键课题之一。
This paper introduces the influences of phase noise to radar systems. The measurement of phase noise in pulse modulated carrier is one of the most important techniques.
介绍了相位噪声对雷达系统的影响，这是毫米波精密制导技术的关键课题之一。
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