The point of degradation, due to attenuation or distortion, at which a signal becomes unusable. 由于衰减或失真使得信号变得不能使用的那个退化点。
The attenuation and group delay distortion in those telephone channels are the main factors affecting data signals transmitted in good quality. 电话通路中所存在的群时延失真与衰耗失真是影响数据信号传输质量的主要因素,对高速数据信号传输的影响更为严重。
Inverse Q filter be for stack is based on the attenuation model of Futterman. By correcting phase distortion of wavelet, compensating frequency and amplitude of seismic wave, the resolution of seismic data the signal to noise ratio are improved, and the events are more continuous. 叠前反Q滤波是以FUTTERMAN衰减模型为理论基础,校正地震子波相位拉伸,补偿地震波频率和振幅的损失,达到提高地震资料分辨率和信噪比及改善同相轴连续性的目的。
It is shown that this algorithm is better than the conventional one in the phase shift, amplitude attenuation, waveform distortion, noise reduction, filtration efficiency, and so on. 分析结果表明,该算法在信号的相位偏移、幅值衰减、波形畸变以及除噪能力和滤波效率等方面均优于传统算法。
When the amplifier is applied to the transmission of the measurement signals over a long distance, the attenuation and distortion caused by distributed parameters of leads can be eliminated. 将这种放大器用到长距离传输电测信号的场合,可以显著地减小引线分布参量造成的衰减和失真;
Group delay distortion, attenuation distortion and echo will cause the intersymbol interference. 影响数据传输质量的主要因素为:群时延失真、衰减失真以及回波引起码间干扰;
Existing methods for travelling wave fault location seldom consider the attenuation and distortion of travelling wave propagating in transmission line and do not solve the problems to define the arrival time of travelling wave and the propagation velocity properly, which leads to poor location accuracy. 一般行波故障测距法较少考虑行波传播的色散情况,没有很好解决如何精确确定行波的到达时间和行波传播速度等问题,使测距精度受到影响。
Research on attenuation and distortion of nanosecond pulse corona discharge 纳秒脉冲电晕放电衰减研究
Hyperspectral remote sensing with optical mechanical scanner inevitably brings in edge radiation distortion in the process of imaging due to its working principles and the influence of attenuation effect of atmosphere. The quality and reliability of hyperspectral images is seriously affected by the distortion. 光机扫描式高光谱遥感由于自身的成像原理以及受到大气衰减效应的影响,成像过程中不可避免地引入了边缘辐射畸变,严重影响了图像的质量和可靠性。
However, UWB signals suffer from severe multipath fading which leads to amplitude attenuation and/ or waveform distortion. As a result, the performance of UWB systems degrades seriously. 但是由于超宽带信道具有严重的多径衰落,超宽带信号容易发生衰减或者畸变,限制了其系统的传输性能。
Because of the pulse high attenuation and distortion, signal processing method should be used to improve the accuracy of time delay estimation. 当超声波信号有较大的变形和衰减时,在互相关函数方法作时延估计之前,需要采用信号处理的方法降噪以提高时间测量精度。
What is different from cable channels is that wireless channel has a lot of randomness, and it results in the attenuation of received signal amplitude, phase distortion and frequency distortion, so this is a great challenge in the performance of the receiver. 无线信道比有线信道有着更大的随机特性,从而导致接收信号幅度的衰减,相位和频率的失真,对接收机的性能提出了很大的挑战。