The fluorescence signal collected by probe was detected , acquired by the computer , and then demodulated by the signal demodulation program . the amplitude of the signal identified the concentration of the biology material 探针收集的荧光信号经过光电倍增管探测、数据采集卡采集后由信号解调程序检测,信号的幅度就反映了待测生物物质的浓度。
Digitalizing includes modulation mode digitalized and equipment all digitalized . aiming at this characteristic , this thesis research in carrier synchronization and signal demodulation of new generation space tt & c system 数字化包括调制方式的数字化和设备的全数字化,本文就结合这一特点对新一代航天测控系统中载波同步和信号解调进行了研究。
This paper first expatiates on the theory of software radio , discussing the multi - rate digital signal processing , high - speed data acquisitions , digital product detector and digital signal demodulation 首先从阐述软件无线电理论的基础入手,对多速率数字信号处理技术、高速数据采集、以及数字信号的正交分解和通信信号的解调技术进行了分析和探讨。
To estimate the channel well , we introduced a pilot signal aided modulation ( psam ) technology , and utilize certain interpolation way to get the statistical effect of channel , hence afford loss compensation for signal demodulation 为解决信道估算的问题,本课题引入导频信号辅助调制,应用一定的插值法,得到信道的统计特性,对信号解调进行衰落补偿。
In this dissertation , some key chips of control circuits are introduced . it analyses the theory about pll - fm and fm signal demodulation , and give out realization of corresponding circuit and characteristic analysis 文中给出了控制电路中关键芯片的介绍,对锁相调频pll - fm及fm信号的解调的理论原理进行了详细分析,并给出了相应的电路实现及有关电路的特性分析。
In chapter4 , several signal demodulation approaches are designed based on practical system . a new nonlinear method to demodulate the wbfm signal and a new method to demodulate 2fsk signal using discrete short time fourier transform are presented 第四章主要结合实际设计系统给出了几种调制信号的解调算法和流程,针对软件无线电的特点,提出了宽带fm信号的非线性解调新算法和基于短时傅里叶变换解调2fsk信号的新算法。
How to understand the correlation of parameters and its influence in communication system is the essential task in the research of communication system . through carrying on research and analysis to various kinds of adaptive algorithms , this paper is focus on the application of the algorithm in demodulation in the digital signal carrier transport . the dpsk signals demodulation basing on adaptive algorithm is improved on and a new method is presented for qdpsk and qam signals demodulation by adaptive filter 简单分析讨论了ask 、 fsk的自适应解调方法,由于本研究的战术电台中信号处理采用的是psk方式,所以本文重点研究了利用ndlms算法对dpsk信号的解调方法,并且结合调制信号中正交载波的特点,提出了qdpsk信号自适应解调方法,在提出上述方法后,本文通过仿真进行了验证。
In this dissertation , strain - sensing network of distributed fbg is designed systemically and researched by experiment . based on analysis of domestic and foreign study actualities on fbg , development trend and several main problems of fbg sensor in application are summarized . and in the need of practical strain - sensing system of distributed fbg network , we research the following five aspects such as design for fbg sensor , signal demodulation of fbg strain - sensing network , multiplexing and addressing , light source design and temperature compensation 本文以分布式光纤光栅应变传感网络的系统设计和实验研究为目的,在对国内外研究现状进行了深入分析的基础上,归纳了当前光纤光栅传感器的发展趋势及在实际应用中需要解决的几个主要问题,并针对分布式光纤光栅应变传感网络的实际系统所需,从光纤光栅传感头设计、光纤光栅应变传感网络的信号解调、复用寻址、光源设计以及温度补偿这五个方面展开研究。