time demodulation

Research on the method of real time digital demodulation for the FSK signal

FSK信号数字化实时解调方法

In order to solve the problem of low accuracy in measuring time difference in SAW based wireless sensor system, a method of digital quadrature demodulation is presented.

提出了采用数字式正交检波技术得到I、Q通道的方法，以此来测量相位，获取传感信息，很好地解决了在无线声表面波传感器测量系统中测量时间差精度低的问题。

Based on the theory of modulation and demodulation, a key technique to realize the real-time transmission of multi-path local signals has been studied, as well as according to circuit. The problem in multi-path local signals transmitting process has been solved.

研究了采用调制与解调方法实现多路现场信号实时传输的关键技术，设计了相应的调制与解调电路，解决了多路现场信号实时传输过程中存在的问题。

The conclusion was verified by simulation signals with different noise intensity and rolling bearing's defect vibration signal. Analysis shows that the proposed method is more effective than direct modulation or time delayed autocorrelation demodulation in denoising or clarifying modulation information.

不同噪声强度仿真数据和滚动轴承故障振动信号实验数据分析表明，该方法比直接解调或仅采用时延相关解调更能有效抑制噪声，凸现信号调制信息。

Algorithm Design of Real Time Demodulation for Shortwave QAM Signals

短波QAM信号实时解调算法设计

Thus, the design and implementation of real time demodulation algorithm of QAM signals are of significant theoretical and practical importance.

深入研究QAM信号的解调算法，对于QAM信号解调的软硬件实现，有非常重要的理论和现实意义。

With the progress of science and technology, laser interferometry technology develops to higher accuracy and greater dynamic range. At the same time, the demodulation technology is demanded higher and higher.

随着科学技术的进步，激光干涉测量技术向着更高的精度和更大的动态范围方向发展，对其解调技术的要求也越来越高。

New Phase Difference Measurement Based on Digital Synchronous Demodulation Theory and Application of Two-Way Time Transfer Synchronization Technology

基于数字同步解调原理的相位差测量新方法高精度双向时间比对同步技术原理与应用

The shot noise and thermal noise with homodyne demodulation technique is given in this article. And phase noise induced with different time delay is also analyzed.

给出了采用零差解调技术时干涉系统的散粒噪声和热噪声，并且分析了在不同时间延迟情况下的相位噪声。

This paper introduces the concept of the HF multitone parallel signal and the technical standard of the 39 tone parallel signal, describes the principle of the 39 tone parallel signal and presents a way to realize the real time demodulation with the TMS320C30/ C31.

本文介绍了短波多音并行信号的概念及39音并行信号的技术规格，论述解调39音并行信号的原理，给出一种用TMS320C30/C31实时解调的实现方法。