demodulation method造句
例句与造句
- The demodulation method contributes in how the sensors work , the range of the sensors " application and their performance . thus the research of novel demodulation precept is of great essentiality
解调技术关系着传感器的工作方式，应用范围和性能，因此研究新型的解调技术，并进一步设计高性能光纤光栅传感器是一个非常重要的研究方向。 - Many kinds of efpi sensors and their demodulation methods were compared . a comparative simple scheme , wavelength modulated / demodulated efpi strain sensing system , was adopted and been used in the new generation fiber optic strain - sensing gauge
分析了光纤法珀应变传感的基本原理和调制/解调方式，通过对几种解调方案的比较，选择了波形分析技术作为实际传感系统的解调方案。 - This paper put forward a demodulation method of fbg sensors based on the voltage drive fabry - perot cavity ( f - p ) , on which we have a feedback control voltage to drive . a novel automatic trace method is creatively proposed
本文提出了一种基于电压驱动可调法布里腔自动跟踪扫描滤波的光纤光栅传感器解调方案，利用电压反馈控制可调法布里腔的方法，达到对外界的振动、应变等物理量引起的布拉格光纤光栅反射光谱的漂移进行解调。 - Although a large number of researchers in domestic research units have been doing a lot of research and investigations on the demodulation methods of fbg , most of the researches are still in the phase of lab experiments and have not yet met the requirements of the practical industrial mass productions
目前国内不少部门和研究单位对其解调技术进行了很多研究，但是大多数处于实验室研究阶段，离实用化，工程化，产品化的标准还有相当距离。 - Most of the work has been demonstrated on our self - built software radio , testbed . at last , based on the universal software & hardware architecture , cost devices , bypass sampling techniques , and multimode demodulation methods , a sdr testbed for software radio is described
最后，结合前文对软件、硬件模型结构、带通采样技术、多模式接收方法的研究分析结果，和目前最新的信号处理器件水平，提出并实现了一个软件无线电实验硬件平台和软件系统构架。 - It's difficult to find demodulation method in a sentence. 用demodulation method造句挺难的
- 2 . several theoretical analysis methods of fiber grating characteristics are presented , including the mode - coupling theory , transfer matrix method , multi - film method and fourier transfer method . the spectra of the fbg and lpg have been analyzed by these methods . the multiplexing techniques and fiber grating demodulation methods are introduced in this dissertation
2 、系统介绍了光纤光栅的理论分析方法,并利用这些方法中的耦合模理论、传输矩阵法和傅立叶变换法对布拉格光栅、长周期光栅、啁啾光栅的光谱特性进行了分析并详细介绍了光纤光栅传感的复用技术和解调技术。 - Although a large number of researchers in domestic research units have been doing a lot of research and investigations on the demodulation methods of fbg , most of the researches are still in the phase of lab experiments and have not yet met the requirements of the practical industrial mass productions
Fbg的解调技术是当前fbg传感技术研究领域的重点和难点之一，目前国内不少部门和研究单位对其解调技术进行了很多研究，但是大多数处于实验室研究阶段，离实用化工程化，产品化的标准还有相当距离。 - Secondly , contrast and comparison of current demodulation methods is done . on the basis of choice of the method of f - p tunable filter , how to design the signal acquisition and processing board is told in detail . every part of the board is analyzed specifically
接着对现有的光纤光栅解调方案进行了分析和比较，并针对实际光纤传感应用中所面临的问题，在选用了f - p腔可调谐滤波法基础上设计了信号处理卡的软硬件，同时对该卡的各个组成部分的实现也进行了具体的介绍。 - ( 2 ) a comprehensive expatiation was given to expound the worldwide status in quo of the fbg transducers " demodulation technique . some basic demodulation methods and theories were explained in detail , indicated their strong point and bound of apply , the limitation of each method was pointed out , thereunder we seeking for a novel demodulation method
( 2 )对光纤光栅传感器解调技术在国内外的研究现状及已经确立的一些基本方法和理论进行了较为全面的分析，比较了各个解调方法的优点、应用范围及局限性，并致力于从中提出一种新型的解调方案。 - From theoretical analysis , we know the existing demodulation methods have limitations as following : one is that the subtraction of the two signals frequencies will display as the result of demodulation when we demodulate two time - domain adding signals without modulating information ( fault information ) ; the other one is that aliasing phenomenon will occur as a result of getting absolute value , detection or square in the process of generalized demodulation analysis , such phenomenon will result in some superfluous frequency composition on the frequency spectrum , which will puzzle the detec tion of mechanical vibration . if the sampling frequency is selected from a suitable range , the aliasing phenomenon will be avoided ; the last one is that aliasing frequencies will be produced in zoom demodulation analysis because this algorithm cannot employ digital low - pass filtering to avert the folding frequencies of higher harmonics in the process of zoom sub - sampling
现有的解调分析方法存在以下三种局限性：将不包括调制信息(故障信息)的两时域相加信号，也以其频率之差作为解调信号而解出；广义检波滤波解调分析中，由于取绝对值、检波或平方过程可能产生混频效应，在解调谱中表现为无法分析的频率成分，并由此推导出避免这种混频现象的采样频率的选取范围，从根本上避免此类误诊断的产生；几种细化解调分析新算法中，因为无法在细化分析的选抽时进行数字低通滤波，有可能会出现调制频率的高次谐波成分发生频率混叠而反折到低频部分的现象。 - However , demodulation technology of fbg is one of the difficulties in the fields of fbg sensing technique research . recently although a large number of researchers in domestic research units have been doing a lot of research and investigations on the demodulation methods of fbg , most of the researches are still in the phase of lab experiments and have not yet met the requirements of the practical industrial mass productions
然而，当前fbg传感技术研究领域的难点之一就是fbg的解调技术，目前国内不少部门和研究单位对其解调技术进行了很多研究，但是大多数处于实验室研究阶段，离实用化，工程化，产品化的标准还有相当距离。 - Chapter is the most important part in this paper , we used pulse position modulation ( ppm ) and maxim - likelihood demodulation to increase the power efficiency , improve the ber , also we used rs ( reed - solomon ) code to correct the bunched bit error because of the atmosphere scintillation . with the ppm modulation / ml demodulation method and rs code , the performance of the system improved to a new stage
第四章是对无线光接入的调制解调和编码技术的分析，也是本文的重点，比较了ppm调制和ook调制的带宽和功率利用率、硬判决解调和最大似然解调对系统性能的改善，以及采用rs纠错码对系统性能的改善。 - ( 2 ) after analyzing the existed fbg demodulation method , according to problems confronted in practical fiber optical sensing application , construct fbgs network to do multi - sensing demodulation experiment to detect the distributed temperature variables . design and settle a set of optical and electrical device system , and programming parallel port muti - channel data collection and data processing software
( 2 )对现有的光纤光栅解调方案进行了分析和比较，在前人研究的基础上，武汉理工大学硕士学位论文设计了一整套分布式fbg传感解调系统，搭建了整个分布式fbg解调系统的实验装置系统，以分布式温度变量为被测对象进行多路传感解调实验，开发出计算机多路数据处理软件。 - Weak signal measurement must be used in this system . this paper takes a deep research on the distributed optic fiber temperature sensor and resolves the following prime problems : first , the principle of distributed optic fiber temperature measuring methods has been researched and four demodulation methods have been discussed
本文对分布式光纤温度传感器进行了全面的研究，主要工作如下： ( 1 )本文对光纤中的raman散射进行了较为全面的理论分析，并对传感光纤中的散射光信号进行了分析，这对传感器信号处理系统的设计具有重要的指导性意义。 - Firstly , on the base of analyzing psk ' s theory and audio - card ' s constitute and data transfers , bdpsk and qdpsk soft - modulation and soft - demodulation systems based on audio - card are studied and implemented , including generating digital carrier sequence , synchronizing carrier , designing filter , sampling and judging , etc . the system adopts coherent demodulation method , synchronizing carrier adopts costas loop
本文首先分析了调相信号调制解调的基本理论和多媒体计算机( mpc )声卡组成原理及数据传输等方面的内容，然后研究并实现了基于计算机声卡的bdpsk和qdpsk信号软件调制解调系统，内容包括数字载波序列的产生、载波同步、滤波器设计，信号的抽样判决等。