Two orthogonal sine waves as referential waves are got by programming phase shift, and realized a soft orthogonal vector′s LIA by using cross correlation algorithm.
介绍了利用软件移相技术得到相互正交的参考正弦波信号 ,通过互相关算法 ,完成了软正交矢量型 L IA相关器的具体实现 ,利用该方法实现了对微弱信号幅值和相位的检测 ,有效地抑制了干扰 ,减少了硬件电路成本 ,并且通过 Matlab仿真 ,验证了该算法具有一定的优越性 ,并在实际应用中取得了很好的效果。
In order to inverse to obtain undergeound water information,determine quantity of groundwater and structure information of stratum,according to multiplicative orthogonal vector lock-in amplifier principle,SNMR(Surface Nuclear Magnetic Resonance) signal collection system based on analog orthogonal vector lock-in amplifier has been designed.
为了对地下水信息进行反演,确定地下水水量、地层结构等信息,根据乘法型正交矢量锁定放大器的基本原理,设计了基于模拟正交矢量锁定放大的SNMR(Surface Nuclear Magnetic Resonance)信号采集系统。
natural haversine formula
半正矢自然函数公式
Research on Adaptive Vector Control System Based on Neural Network;
基于神经网络自校正矢量控制系统的研究
Vector differences may also be found by the method of rectangular resolution.
矢量差也可用正交分解求得。
The radius vector of each solid is always a positive length.
每个立体的矢径总是正值长度。
Error Analysis and Emendation of Map Vectoralization Based on MAPGIS6.6;
基于MAPGIS6.6地图矢量化误差分析及校正
Error Calibration and Remedy for Electromagnetic-Vector Sensor Array Misorientation
矢量天线阵元方向不一致的误差校正
The magnitudes of the rectangular components of a vector are easily computed.
一个矢量的正交分量的大小是很容易计算的。
The angle made with the positive horizontal axis by the vector representation of a complex number.
幅角代表一个复数的矢量与正实轴之间的夹角
A Study about Normal Mode Decomposition by Vector Sensor Array;
基于矢量传感器基阵的简正模分离研究
The Application of Positive Characteristic Vector Method in Input-Output Analysis;
正特征矢量法在投入产出分析中的应用
Calibration and Correction of 4-port Vector Network Analyzer;
四端口矢量网络分析仪误差校准及修正
The positive character vector method to adjust grey direct consumption coefficients using the dependent function;
灰色直接消耗系数可拓调整的正特征矢量法
Solving Physical Problems on Showing Vector Direction with Sign;
用正负号表示矢量方向解决物理问题的探讨
Matrix Expressions on Orthogonal Bases under Lorentz Transformation;
任意正交曲线坐标基矢洛仑兹变换的矩阵表示
Design of MRS Signal Collector Based on Orthogonal Vector Lock-in Amplifier
基于正交矢量放大的MRS信号采集模块设计
Capon Beamforming Calibration Algorithm for Steering Vector Mismatch Error
导向矢量存在匹配误差时Capon波束校正算法
Design of Active Orthogonal Vector Detection System in Frequency Domain
频率域有源正交矢量型检测系统的设计
Design of SNMR FID Signal Collection System Based on Analog Orthogonal Vector Lock-in Amplifier
基于模拟正交矢量锁定放大的SNMR信号采集系统