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- Chapter 2 is theory which disposable VHF jammer based on ,including theory of bandpass signal sampling 、multi-rate signal process and high effective digital filter technology . 第2章从理论上探讨了干扰机设计所依赖的基本理论:采样定理是软件无线电的理论基础,多速率信号处理、高效数字滤波理论是VHF一次性干扰机实现的理论依据;
- Fundamentals of IF (Intermediate Frequency) bandpass signal sampling and quadrature detection are discussed, especially the coherent mixing LPF method and Hubert transform frequency-shift method. 摘要结合对带通采样定理的理解,讨论了直接中频带通信号采样正交检波的基本原理,重点探讨正交混频低通滤波法和希尔伯特变换频移法。
- Bandpass Signal Sampling 带通采样
- The digital quadrature sampling theorem for bandpass signal is presented and the optimum design for the sampling system is also discussed in this paper. 该文证明了带通信号的数字正交采样定理,并讨论了这种采样系统的优化设计。
- DSP card is used for video signal sampling and image data processing. DSP高速数字信号处理板做从机,主要负责图像信号的实时采集和图像数据的实时处理。
- For a bandpass signal at no-integer band position,the first-order undersampling will cause spectrum aliasing. 对处于非整数带位的带通信号,一阶采样往往要引起频谱混迭。
- This article presents a composite video signal sampling system based on CPLD. 介绍了一个以CPLD为控制单元的黑白全电视信号采集系统。
- The simulation example was presented to illustrate the calculation of interpolants and the reconstruction of bandpass signal from the non-uniform samples. 计算机仿真实例验证了非均匀采样时内插函数的计算和带通信号的重建过程。
- The definition of the complex signal, real modulation and complex modulation, the complex low-pass signal representation of real bandpass signal, SSB complex mo. 文中介绍了复信号的定义、实调制与复调制、用复低通信号表示带通信号、单边带复调制与解调,以及数字单边带韦瓦复调制在数字化载波机中的应用。
- In this paper a new design for orthogonal three channel ECG and PCG signal sampling system was introdued. 本文介绍了一种正交三导联心电和心音信号采集系统。
- The key to the design of feeble signal sampling system lies in the designing of ultra low noise preamplifier. 设计超低噪声前置放大器是设计微弱信号采集仪器时不可回避的技术问题。
- Multirate Sampling of Variable-Frequency Bandpass Signal 变载频带通信号的多速率采样
- The single-chip system accomplishes the signal sampling and the data transmission. 单片机采集、数据通讯系统完成电路状态的采样和数据传输任务;
- This system includes signal sampling and processing, fuzzy recognition of anode effect, and database modules. 本系统包括信号采集与处理、阳极效应模糊辨识、数据库及管理等模块。
- Sampling Theorem for Bandpass Signal Disturbed from a Sine Signal 正弦信号干扰下带通信号的采样
- Based on the monitoring requirement on the main ventilators at coal mines,this paper put forward the principle for designing signal sampling device at large section ducts. 结合煤矿主通风机监测的要求,提出了大截面风道流量信号采集装置的设计原则,并设计了变截面、全压管、复合管、背压管流量信号采集装置;
- In this paper, the methods of the biomedical signal sampling, calibrating and scale translating of experiment parameter in pharmacolgical experiment are introduced. 本文介绍了药理学实验中,实验信号的标定,采样,和实验参数的标度变换等项功能的实现。
- SOC is used to integrate data acquisition and sensor signal sampling in one module,thus the signal acquisition is achieved on the rolling axis and the precision is rised. 采用SOC技术将数据采集与敏感弹性元件置于一体,在旋转轴上完成了扭矩信号的智能采集,提高了测量精度。
- reconstruction of bandpass signal 带通信号重建
- undersampling of bandpass signal 欠采样