数字信号

We know, PC is a digital system, the internal high-frequency characteristics of signal waveforms for the square wave, and square wave contains a large number of harmonics.

我们知道，PC是一个数字系统，内部高频信号的特征波形为方波，而方波含有大量的谐波。

Must be wireless, and real-time waveform of the digital audio signal integrity test system.

要求必须无线方式，并且能实时的对数字音频波形信号完整性测试系统。

Direct digital waveform synthesizer; linear frequency modulated signal; digital-to-analog conlerter; pulse compression

直接数字波形合成；线性调频信号；数模转换器；脉冲压缩

The structural of mechanism adopted double pipes feed-in with mixing machine, special weighbridge for reducing bond; The hardware circuit make use of the programmable amplifier AD8555 which amplify the weak sensor signal and bridge imbalance compensation and gain error, at the same time,32-bit microprocessor LPC2134 was used as the core of the hardware to deal with the messages and send order to the implement machine. Software design transmits materiel by stages and FIR filter was adopted to remove big errors and enhance precision.

机械结构使用双管螺旋喂料机加搅拌机构，特殊的称斗结构；硬件电路采用数字可编程放大器AD8555作为称重传感器微弱电信号的放大器，以便于补偿桥式传感器的失调和增益误差，同时采用32位单片微处理器LPC2134作为整个电路的处理核心，及时处理称重信息，并向执行机构发送命令；软件根据称重值采取分阶段喂料，并加入了FIR软件滤波，滤除了粗大误差信号，提高了称重精度。

Bilinear Z transform with the design of IIR Butterworth digital low-pass filter, ECG can be achieved in the removal of random noise.

详细说明：用双线性Z变换法设计IIR巴特沃思型数字低通滤波器，能够实现心电信号中随机噪声的去除。

Bachel degree above, majing in Electronics, with over 2 years related wk experience; over 1 year wk experience in EMC design of board /card products; familiar with EMC testing stards the technical requirements of EMC EMS testing items; familiar with theetical knowledge in analog circuit, digital circuit, high-frequency electronic circuit, signal system electromagnetic field.

电子类专业本科以上学历，2年以上相关工作经验，有1年以上板卡类产品EMC设计工作经验，了解EMC测试标准，熟悉EMC，EMS的各项测试项目的技术要求，熟悉模拟电路，数字电路，高频电子线路，信号与系统，电磁场的理论知识。

By using canonic signed digit to represent each coefficient of FIR filter and local search method to optimize the coefficients, we implement a multiplier-less FIR filter.

利用卫星数字电视广播系统中接收信号的频谱特性，提出一种基于离散傅立叶变换的载波恢复算法。

The digital I/Os are galvanically isolated; the signals are connected through a D-sub connector.

数字I/O是偶合孤立的，信号通过一个D-sub连接器进行连接。

The company has two operation centers: one in Beijing, China and the other in Germantown, Maryland, a suburb of WashingtonD.C.

技术团队由拥有多项世界级发明专利的世界级数字通信领域和混合信号 IC 专家组成。公司在中国首都北京和美国马里兰州设运营中心。

The light of incidence goes into CCD, reflected by ichnographic mirror and thrilling through lens, and is transformed to digital signal by video processing circuit.

入射光经光学系统后，照射在CCD敏感元件，经视频处理电路处理后形成数字图像信号。

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。