1) incoherent detection
不相干检波
2) coherent detection
相干检波
1.
Extraction of the In-pulse Characteristics of Signal Based on Direct Sampling from IF signal and quadrature coherent detection;
基于中频直接采样正交相干检波技术的信号脉内特征提取
2.
According to the principle of IF signal sampling and quadrature coherent detection, the scheme sampling the 30 MHz radar IF signal (Bandwidth= 2MHz) directly is presented.
依据中频信号采样与正交相干检波的基本原理，提出了直接对３０ＭＨｚ的雷达中频信号（带宽２ＭＨｚ） 进行采样来实现正交相干检波的方案，给出了计算机定点仿真及硬件实现结果。
3.
This paper discusses how to implement the direct sampling of radar IF signal with high speed A/D converter and how to resolve one channel of digital signal into two orthogonal digital signals by Bessel interpolation or low pass filtering to realize a digital coherent detection,presents the implementation program based on high speed AD6640 and complex programmable logic device.
讨论了如何利用高速模/数(A/D)变换器实现对雷达中频信号直接采样,如何通过Bessel插值或低通滤波将1路数字信号分解为2路正交数字信号以实现数字相干检波,给出了基于高速 AD6640 及复杂可编程逻辑器件的实现方案。
3) coherent detector
相干检波器
4) quadrature coherent detection
正交相干检波
1.
Realization of quadrature coherent detection by direct sampling of IF signal;
直接中频采样实现正交相干检波的研究
2.
The essential principles are analyzed pointing at the method of realizing digital quadrature coherent detection by direct sampling,which has been put forward recent years,and a new realizing method is explained with a systematic view.
针对近年来提出的通过直接采样实现数字化正交相干检波的方法 ,分析了其基本原理 ,并用系统的观点解释了一种新的实现方法 ,阐明了该方法的基本原理及适用条件 ;理论分析及仿真结果表明 ,这一方法完全可以满足高性能数字化处理的要
3.
The principles of realizing quadrature coherent detection by direct sam pling of Intermedi-ate Frequency(IF)signals are introduced in this paper.
介绍了用直接中频信号采样方法实现正交相干检波的基本原理,分析并总结了到目前为止已知的几种中频采样的具体方法。
5) quadrature coherent detector
正交相干检波
1.
The quadrature coherent detector is widely used in the field of signal processing since it can reserve all information about the complex envelope of IF signal.
正交相干检波可以保留信号复包络的所有信息 ,因而在信号处理领域中有广泛的应用。
2.
Considering that traditional digital quadrature coherent detectors present smaller image frequency ratio,smaller data throughput and heavier cost of resources,a new method based on polyphase filter and reduced adder graph is given in this paper.
针对传统正交相干检波方法存在镜频抑制比、数据吞吐率小以及硬件设计资源消耗大的不足,提出了一种基于多相滤波和简化加法器图结构的数字正交相干检波方法,此方法在有效改善系统正交相干检波性能的同时,提高了数据吞吐率,节省了系统实现的硬件资源。
6) coherent detector
相干检波器<光>
补充资料：相干散射和非相干散射
再辐射的光量子频率和被吸收的光量子频率准确相等的散射过程称为相干散射。在相干散射的情况下，源函数准确地等于平均辐射强度。再辐射的光量子频率和被吸收的光量子频率不相等的散射过程称为非相干散射。在天体物理中，存在一系列因素使散射过程成为非相干散射。主要的因素是：原子的能级有一定的宽度、原子的热运动和湍动以及压力效应等。对于非相干散射，源函数是相当复杂的。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条