The SETI institute, which searches for extra terrestrial life, has compared picking up a signal’s modulation to picking up the sound of a flute when it’s masked by the noise of a waterfall.
对外星智能的探索研究院，专门寻找外星生物。它他们对接受到信号的变调和被瀑布声掩盖的笛声做了比较。
A new frequency estimation technique for BPSK modulation signals embedded in strong noise is proposed.
在强噪声背景下，针对BPSK调制信号，提出了一种新的频率估计技术。
But the existence of noise funneling in the return path of cable network in HFC system restricts the selection of modulation techniques for the return path.
但HFC网络中同轴电缆网络上行信道中存在的噪声漏斗效应限制了上行信道调制技术的选择。
In multimedia signal processing, quantization error is a function of input signal and it results in the audible distortion and noise modulation in the audio signals.
在多媒体信号处理中，由于量化误差是输入信号的函数，使得语音信号产生信号失真和噪声调制。
In demodulation type transponder the demodulated baseband signal accompanied by noise is used for further modulation and retransmission.
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。
This translates to more distortion, and crucially noise floor modulation.
这编译出更多失真、还有关键性的底噪调制。
The results show that digital modulation is with high resolution, total digitalization programmable, and low phase noise etc.
结果表明，数字调制具有分辨率高、全数字化可编程、相位噪声低等特点。
While a noise modulation module used for canceling range ambiguity and mutual interference was proposed, modeled and analyzed.
同时加入了一种噪声调制以解决距离模糊和同类系统相互干扰，并加以建模分析。
Error propagation caused by noise can be avoided by precoding the data at the transmitter prior to modulation and decoding operation of received signals.
在调制信号前采用数据预编码，对接收信号进行相应译码，以消除信道中噪声引起的差错传播。
First, the generation mechanism, components and frequency characteristic of radiated noise of naval ships are studied. There exists periodical modulation for the amplitude of propeller noise.
首先讨论了舰船辐射噪声的产生机理、构成和频率特性，指出螺旋桨噪声的振幅存在周期性调制。
The experimental results prove that this technique is one of the best modulation techniques of narrow noise, and that this technique may be conveniently applied to engineering.
经过试验证明，该技术是一种最佳的窄带噪声调制技术，并且可以方便地实现工程化。
The results show that the method can effectively separate the dynamic modulation from other parts of radiated noise, and extract harmonic features.
结果表明，该方法可以有效地实现动态调制分量与其他信号的分离，准确提取谐波特征。
The effect on modulation and demodulation of QPSK via carrier phase noise can not be ignored, and it is difficult to analyze.
载波相位噪声对QPS K调制解调的影响是不可忽略的，也是难以分析的。
According to frequency spectrum transfer characteristic of modulation and demodulation, we think the position measurement noise is Gaussian narrowband noise.
根据调制解调的频谱转移特性，提出了有效位移噪声是高斯窄带噪声。
Many factors, such as noise, speckles and low modulation in wrapped phase make the unwrapping procedure complicated and path-dependent.
实际干涉计量中各种干扰因素的存在，使得包裹相位图中可能存在噪声、低调制点或散斑等误差点。
The arithmetic formulas for sine wave, linear frequency modulation signal, V-style frequency modulation signal, white noise signal, reverberation signal and echo signal are given by their definition.
根据信号类型的定义，给出了正弦信号、线性调频信号、V型调频信号、白噪声、混响和回波信号的合成公式。
The noise performance in binary digital modulation system is analysed in the presence of gaussian hybrid additive white bimodal noise.
本文以一类高斯型混合非高斯噪声双模噪声为背景噪声，详细分析了二进制数字调制系统的抗噪声性能。
Tests on the Modulation Board showed that this noise was inherent due to abrupt rising edges of tw...
在调制板上进行的试验表明，由于两个控制信号的沿边突然升起，这种噪声是固有的。
You're unlikely to notice tape modulation noise outside of a recording studio because it's specific to analog tape recorders, which are fast becoming obsolete, and usually hidden by the music itself.
录音室外的人不大可能听到调制磁带时的噪音，这种噪音是那些很快就过了时的模拟式录音机所特有的，并且这些噪音常常被磁带内容所掩盖。
According to GPS signal structure and modulation characteristics, a GPS intermediate frequency digital signal is simulated under the condition of noise environment.
根据GPS信号的结构和调制特点，加上环境噪声，模拟出GPS中频数字信号。
The SETI institute, which searches for extra terrestrial life, has compared picking up a signal's modulation to picking up the sound of a flute when it's masked by the noise of a waterfall.
探索外星生命的外星探索研究所已经对接收到调制信号和接收隐藏在瀑布水声中长笛声进行了对比。
With vision noise added to the stimulus pictures, the quality of perception decreased, the mental rotation process postponed, and the onset of the amplitude modulation was delayed.
刺激图片加入视觉干扰后，知觉质量下降，心理旋转加工推后，波幅调制的起始时刻推后。
Combining the concentration modulation spectroscopy with velocity modulation spectroscopy, the dependence of the signal to noise ratio on the modulation depth and various other factors are obtained.
将浓度调制光谱与速度调制光谱相结合得到了速度调制光谱调制度与各因素的关系。
In this thesis, a Broad Band signal generator based on noise frequency modulation for radar is studied.
本课题主要研究了对雷达信号进行干扰的宽带调频噪声信号源。
As compared with that from the electronics system by detecting and filtering direct the signal-to-noise (SNR) of modulation signal from the nonlinear bistable system is higher.
与直接经电子学系统检波、线性滤波后所提取的调制信号相比，前者所获调制信号的信噪比更高。
The paper analyzes the interference rejection of Quadrature amplitude modulation signals in the presence of carrier phase jitter, sinusoidal interference and white Gaussian noise.
文章分析了存在载波相位起伏、正弦干扰、高斯白噪声时正交调幅数字系统的抗扰性。
Broadband noise frequency modulation signal with high precision is commonly used in modern electronic interference system.
宽带高精度的噪声调频信号在现代电子干扰系统中应用广泛。
Broadband noise frequency modulation signal with high precision is commonly used in modern electronic interference system.
宽带高精度的噪声调频信号在现代电子干扰系统中应用广泛。
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