The new method uses incoherent sampling,and adopts the window-added and interpolated measurements based on the standard fast discrete Fourier transform to reduce spectral leakage and to improve evaluation precision, and can reduce as greatly as possible the difficulties and cost in constructing the evaluation system.
提出了一种高速模数转换器频域特性评估新方法,即采用非相干采样方式,在标准快速离散傅里叶变换的基础上增加加窗和插值措施,从而显著减少了频谱泄漏,提高了评估精度,最大限度地降低了评估系统构建难度和成本。
The new method uses incoherent sampling,and adopts the window-added and interpolated measurements based on the standard fast discrete Fourier transform to reduce spectral leakage and to improve evaluation precision, and can reduce as greatly as possible the difficulties and cost in constructing the evaluation system.
提出了一种高速模数转换器频域特性评估新方法,即采用非相干采样方式,在标准快速离散傅里叶变换的基础上增加加窗和插值措施,从而显著减少了频谱泄漏,提高了评估精度,最大限度地降低了评估系统构建难度和成本。
According to the principle of correlation detection,an automatic measurement system for extinction ratio of polarizer consisted of monochromator and DSP Lock-in amplifier and compurer is designed not only to eliminate the influence on measurement accuracy caused by drift of intensity of light source but also to obatain approximate extinction spectrum.
基于相干检测原理设计了一套由单色仪、数字锁相放大器和计算机联合使用的透射式偏光镜消光比智能化测试实验系统,采用双频双光路分光单探测器接收锁相放大器分离信号比对法进行源补偿测量,克服了光源光强漂移所带来的影响;实现了可见光区消光比的精确自动测量,而且可以测得近似的消光光谱。
Effect of modulation frequency Jitter on coherent detection and its elimination algorithm;
调制频率抖动对相干检测的影响及消除算法(英文)
Differential detection and coherent detection based on space-time block codes;
基于空时分组码的差分检测与相干检测
The OSCM system based on coherent detection in atmospheric optical communication is designed and the signal transmission performance of this system is simulated and analyzed in this paper.
设计了应用于大气光通信的OSCM(光微波副载波复用)相干检测系统,对系统的信号传输性能进行了仿真分析,在理论上验证了该方案误码率低,可同时传输多路信号,适用于大气信道。
Differentially Coherent Detection and Phase Compensation Algorithm in Underwater Acoustic Communication
水声通信中差分相干检测及其相位补偿方法
Polarization-Induced Fading Elimination Technique for Coherent Detection of Brillouin Scattering Spectrum
布里渊散射谱相干检测的消偏振衰落技术
Research on Wavelength-Division Multiplexing of Interferometric Fiber Optic Signals;
多路光纤相干检测信号的波分复用技术研究
Research on Channel Estimation, Equalization and Coherent Detection under Fading Channels;
衰落信道上信道估计、均衡与相干检测技术研究
Research on Time-Division Multiplexing of Interferometric Fiber Optic Signals;
多路光纤相干检测信号的时分复用技术研究
Real-time Wavelet Transform Based Coherent detecting Brillouin Optical Time Domain Reflectometer
基于实时小波变换信号处理的相干检测布里渊光时域反射计
coherent light detecting and ranging
相干光检波与测距系统
Reduced-state noncoherent sequence detection algorithm for CPM
CPM的减少状态非相干序列检测算法
12-electrodes Electrical Capacitance Tomography Detection System Based on Relevant Technology
12电极相干电容层析成像检测系统
Detection Performance of MIMO Radar for Coherent Pulses
MIMO雷达的相干脉冲串检测性能
Brillouin frenquency shift sensing system with double fibers coherent heterodyne detection
双光纤相干外差检测布里渊频移的传感系统
Characteristic of Modified Spectrum Auto-interferometric Correlation for Femtosecond Pulse and Measuring of the Chirp;
飞秒脉冲干涉自相关修正光谱特性与啁啾检测
Detecting Periodic Signals Based on a Statistical Theory of Signal Coherence
基于信号相干统计理论的周期性信号检测
Research on phase-shifting interferometry contrast three-dimensional topography of ultra precision surface
超精表面三维形貌相移干涉检测实验研究
Testing Method of Coherent Tag Signals Based on Digital Beamforming
基于数字波束形成的相干标签信号检测方法
Application of high order coherence technique in the fault detection in coal field
高阶相干技术在煤田断层检测中的应用
Optimization of UWB Non-Coherent Receiver
非相干能量检测UWB接收机误码率性能优化
A CGH PHASE DETECTING INDIRECT SHEARING INTERFEROMETRY FOR ABSOLUTE MEASUREMENT OF ASPHERIC SURFACES
用于非球面绝对检测的计算全息位相探测类剪切干涉法