| 1. | Research the digital quadrature demodulation
数字解调技术及其实现。 |
| 2. | The application of digital quadrature demodulation in wireless saw sensor systems
数字正交检波技术在无线声表面波传感器系统中应用 |
| 3. | A real time method for the calibration of the quadrature demodulation error of the rcs measurement radar receiver is proposed
摘要针对脉间变频rcs测量雷达采用模拟正交解调方法获得同相分量和正交分量所引入的解调误差，提出了一种实时校准方法。 |
| 4. | Through the analysis of advantages of several gmsk arithmetic and requirement of system processing , the base - band time lag demodulating algorithm based on quadrature demodulation and tms320vc5402 are selected for base - band processing
通过分析gmsk几种算法的优越性以及系统对处理的需求，选择基于正交解调的基带时延检波算法以及tms320vc5402进行基带处理。 |
| 5. | The method based on quadrature demodulation is studied and the equations used to calculate the frequency , magnitude and phase ( difference ) of signals are given . the author has designed two kinds of low pass filters ( lpfs ) and has studied two kinds of frequency - tracking methods
研究基于正交解调的科里奥利质量流量计信号处理方法，给出了同时求出信号的频率、幅值和相位(差)的公式，设计两种滤波器，研究两种跟踪方法，并进行仿真和比较，得到较好的方案。 |
| 6. | On the basis of our lab ' s previous achievements , the author has studied three kinds of digital signal processing methods - the method based on a digital phase locked loop , the method based on quadrature demodulation , and the method based on adaptive funnel filter ( aff ) and sliding goertzel algo rithm ( sga ) . the author has also studied the cmf driving principle , various analog driving circuits , driving waves , and digital driving methods
主要研究了三种科氏流量计的数字信号处理方法：基于数字锁相环的方法、基于正交解调的方法和基于自适应funnel滤波器和滑动goertzel算法的方法；以及科氏流量计驱动的原理、各种模拟驱动的波形、电路以及数字驱动的方法等。 |
| 7. | The main contents of this paper include : the theory of if digitization ( sampling , quantization , quadrature demodulation and multi - rate digital signal processing ) , the simulation of the system project , the design and implementation of the ddc part and introduction of the main devices applied in it
本文的主要内容包括：中频数字化理论（采样，量化，正交解调，多相滤波结构以及fir滤波器的设计等） 、系统方案论证及仿真、数字下变频部分的硬件实现、系统调试及结果分析以及系统采用的主要器件介绍等。 |
