数字信号处理

Digital receiver and its forepart operational principle are discussed, then me...

本文讨论了数字接收机以及前端的工作过程，然后详细阐述了瞬时自相关、短时傅立叶变换、WD算法、过零检测和小波分析等各种算法在脉内调制分析上的应用，分析了各算法的优缺点，提出一种并行处理模式：即针对不同的信号采用不同的算法对脉内调制信号进行分析。

Is a functional block diagram of a digital video receiver according to the present invention.

图6为本发明实施方式的处理数字视频信号的装置架构示意图，其为数字视频接收器。

A modified schmitt trigger based relaxation oscillator is used to convert thermistor and hygrometer resistances into a frequency signal .

在前端运用基于施密特触发器为基础的松弛振荡器把温、湿度传感器的电阻值转换为频率的信号，从而把温度和湿度的变化转变为数字电路可以处理的频率信号的变化。

The simulation results show that the denoising effects of the three methods are all superior to that o f Fourier transform, and the influence of colored noise can be eliminated effectively by bispectrum methods. That is very i mportant for reconstructing LoranˉC signal under the condition of small signalˉtoˉnoise ratio, and also lays the fou ndation for digital LoranˉC signal processing.

仿真分析结果表明，三种方法的去噪效果都优于传统的傅氏变换法，且双谱估计能够有效地去除色噪声的影响，对于小信噪比条件下的罗兰C信号的提取和恢复具有重要意义，也为复杂环境下对罗兰C信号的数字处理奠定了良好的基础。

The few word processing module from AT89S52, TVIA5715, the SAA7113 constitution, first the video semaphore digitize, then the conversion becomes the RGB semaphore output of the non-interlaced.

数字处理模块由AT89S52、TVIA5715、SAA7113组成，先将视频信号数字化，再转化成为逐行的RGB信号输出。

We researched the pre-processing algorithm of mapping signal: A comb filter was designed according to the property of the electromagnetic environment in operation room and the spectrum of EPM signal The Zero-Phase property has been achieved by using bi-direction IIR filter during off-line data processing.

研究了心外膜标测信号预处理算法：针对在手术室环境下电磁干扰强的特点和除极信号频谱分析的结果，设计了梳状数字滤波器，利用数据离线分析的特点进行双向IIR滤波，在减少计算量的同时实现了零相位特性。

It's very important to process digital orthorhombic demodulation.

对接收到的高频信号进行全数字正交相干检波是十分重要的，它保留了信号复包络的完整信息，包括振幅和相位，因此可以很好的提取有用信号，对其进行后续处理；在匹配滤波器理论指导下提出的人们提出了脉冲压缩概念，脉冲压缩体制较好的解决了作用距离和分辨力之间的矛盾实现了提高雷达距离分辨力的要求。

The sensor's signals in flowmeter are processed digitally by means of the power spectrum analyzing method based on the periodogram spectrum method. The real frequency of signal is calculated, and the accurate volumetric flow is measured.

它采用周期图谱分析方法对涡街流量计中传感器的信号进行数字处理，准确计算出信号的频率，测出准确的体积流量。

By using Digital-Trailing-Filter and DSP technology, we got solution of trailing filter for transient signal in frequency-scan test,so as to refine the needed test signal from the deformative and weak signal.

通过采用数字跟踪滤波和DSP处理技术，解决了扫频测量中瞬态信号的跟踪滤波，使仪器能够在畸变的、微弱的信号中提取出需要的测试信号，同时使仪器的测量时间大大缩短。

C8051F005 is the control center of the survey meter, the signal is obtained by jaw pressure transformator and current transformator. Direct Digital Frequency Synthetics technology is adopted to automatically adjust the frequency of the actuating signal and avoid the interference of the signal in the ground network.

该检测仪采用C8051F005单片机作为控制处理中心，钳口式电压互感器和电流互感器检测接地电阻信号，运用直接数字频率合成技术自动调整激励信号频率，从而避免地网中干扰信号源的影响。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。