The Time - domain Measure Technique of Vector Network Analyzers base on Inverse Chirp - z Transform 基于chirp-z逆变换矢量网络分析仪时域测量技术
The implementation scheme and design method are introduced for the time domain wideband beamforming with the constant beamwidth using vector arrays. Using the uniform linear array, a time domain implementation of the algorithm is proposed. 介绍了在时域矢量(TDV)阵宽带恒定束宽波束形成的实现原理和设计方法,并以均匀等间距线阵为例,给出了时域恒定束宽算法的实现流程。
It establishes the neural network ( NN ) optimized by PSO for fault diagnosis, in which the features in time domain and frequency-domain from gearbox vibration signal are taken as input vector, while its main fault types as output vector of NN. 以齿轮箱振动信号的时、频域特征为神经网络输入,以齿轮箱的主要故障形式为输出,建立基于粒子群优化算法神经网络故障诊断系统。
On the other side, the character of CELP algorithm is that it does not distinguish voiced or unvoiced speech, and it uniformly uses time domain waveform matching method based on AbS principle to produce LP excitation, which is represented by vector codes. CELP算法的主要特点是不区分语音信号的清浊音类型,而是统一使用基于AbS原理的时域波形匹配方法来产生线性预测激励,且该激励信号通过矢量码本来表示。
Because of multi-resolution property in frequency and time domain and approximation ability of wavelet, we constructed Meyer wavelet kernel by combination of wavelet and kernel support vector machines. 鉴于小波的时频多分辨特性和良好的逼近特性,我们将小波与核支撑矢量机结合起来,构造了Meyer小波核,并将其用于SAR目标识别。