数字信号处理

In order to measure the passive network's conduction automatically, a network conduction instrumentation based on FPGA technology was designed and implemented according to the design principle of Virtual Instrument. System adopted FPGA technology building a digital flat-top to imitatively produce the high quality sine signal. Under the control of C8051MCU, measurement, calculation and display of the port network's conduction were automatic implementation. Furthermore, the system has the function of frequency step measurement.

摘 要：为了实现对无源端口网络的导纳进行自动测量，根据虚拟仪器设计思想，设计实现了基于FPGA的网络导纳测量仪，系统以FPGA作为数字平台模拟产生优质的正弦信号，在单片机C8051的控制和处理下，自动实现端口网络导纳值的测量、计算、显示，同时具有频率步进测量功能。

The paper introduces the PLC control system in which intermediate value strain in average wave handling is carried out to simulated signal.

文章介绍了PLC控制系统中对模拟信号进行中值平均滤波处理，并给出了一种数字滤波程序的设计方法。

At present, the analog filtering method for LoranˉC is mo stly used, but it does denoise capability is not very satisfactory, and with traditional digital processing methods, the s ignals can't be received in complicated environment.

目前国内罗兰C接收机主要采用模拟滤波方法，去噪效果较差；而传统数字处理方法难以实现复杂环境下的信号接收。

Given multi-clock domain systems integrated in the single chip,the number of asynchronous greatly increased, the metastability has increasingly important effects on the reliability of the PLDs.

在用P L D实现同步数字系统设计时，如果所有模块共用同一个时钟信号，系统中所有的寄存器都由该时钟的边沿来触发，这样的时钟设计·2006第02期·ELECTRONICS QUALITY可以使整个设计流程易于处理，顺利实现综合、布局布线到静态时序分析。

The method includes the process of performing a quick reselection on available digital control channels at points in the selection process, when a first DCCH that meets received signal strength criteria at the mobile station has been located using a conventional process, but a more preferable second DCCH could possibly still be found.

该方法包括在采用常规处理已找到在移动站满足接收信号强度标准的第一DCCH，但仍发现可能更好的第二DCCH时，在选择过程中在这些这些点对可使用的数字控制信道进行快速重新选择。

Then they were imported to MATLAB and calculated to obtain the power spectral density.

将数字声波信号导入MATLAB软件进行处理，得到其功率谱密度图。

In this paper, the designing and implementing of a certain electronic theodolite optoelectronic signal digital system are presented in detail.

本文详细描述了某型电子经纬仪光电信号数字处理系统的设计和实现的全过程。

In this paper, the design and implementation of DZJ5 electronic theodolite electrooptic signal processing system are presented.

介绍了DZJ5型电子经纬仪光电信号数字处理系统的设计及实现。

The forgetting factor was optimized by reducing the trace of the input error covariance matrix. This factor is able to modify the iterative learning law of control input. The error signal of the feed-forward learning controller was filtered by a zero-phase FIR digital filter.

通过减小系统输入误差协方差矩阵迹的方式得到优化的遗忘因子，来修正控制输入的迭代学习律，同时采用零相位FIR数字滤波器对前馈学习控制器中的误差信号进行滤波处理。

This subject has mainlyexplained that chooses integrated circuit as the key device, hasdesigned a simple and easy digital cymometer, regard trigger andcounter as core , input , separate by signal frank , touch off ,count circuit , data processing , data reveal module of functionmake up.

本课题主要选择以集成芯片作为核心器件，设计了一个简易数字频率计，以触发器和计数器为核心，由信号输入、隔直，触发、计数、数据处理和数据显示等功能模块组成。

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。