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滤波器的设计，信号的抽样，频率变换，信号的幅频，信号的相频等-Filter design, signal sampling, frequency conversion, the signal amplitude and frequency, phase frequency signals, such as
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FIR filter design with unseperable window, seperable window, frequency sampling method
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本文介绍了一种单片机系统中高速数据采集的实现方法，我一直想在Windows系统下,做出一种能实时刷新的高速数据采集的方式,但总是不理想,大多也是用缓存的方式将数据存储起来,然后处理,无法真正的实现实时的数据刷新,还是要用硬件的方式去实现,下文就是介绍了这样一个方案,在单片机与高速A/D转换器之间以静态存储器作缓冲器,采用A/D转换器直接写存储器的方式提高采样频率,实现高速数据采集。并给出了设计方案。-In this paper, a single-chip microcomputer syste
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ITD方法分析
需要自己输入数据，如模态阶数、采样频率等-ITD analysis needs its own input data, such as the modal order, the sampling frequency, etc.
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可以对输入的方波信号进行任意角度的移相，适当提高采样频率可以提高移相精度。-Can be input square wave signal of arbitrary phase-shift angle, appropriately increasing the sampling frequency can improve the phase-shift accuracy.
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本文首先推导出过采样滤波器组精确重构的条件, 由于此时所需的约束条件数比临界采
样时少, 因而可以设计出频域衰减特性更好的滤波器组-This paper is derived through sampling filters of exact reconstruction of conditions, due to time constraints required for critical extraction ratio
When a small sample, so you
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利用前端高速ADC来覆盖给定的监视带宽, 在粗略估计载频并考虑一定的保护带, 利用带通信号的均匀欠采样定理行内插抽取, 以获得欠采样后的信号。-Using high-speed ADC front-end to cover a given monitor bandwidth, carrier frequency at a rough estimate and considering some of the protection zone, use less uniform bandpass sa
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VC++设计图用集成信号发生节点产生正弦波，设信号频率为60，采样频率为1000，采样点数为50-VC++ design with integrated signal node generates a sine wave signal frequency set at 60, the sampling frequency of 1000, 50 sampling points
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根据压缩传感(Compressed Sensing，cs)N论，首次提出了短时电能质量扰动信号的压缩采样方法，该方法突破了奈奎斯特采样频率的限制，实现了低于奈奎斯特采样频率的低速率采样。文中对比分析了CS理论与传统采样理论，研究了cS短时电能质量信号压缩采样的实现方法，包括：测量矩阵的构建、稀疏基的选取和电能质量信号快速贝叶斯匹配追踪重构算法(FBMP)-Compressed sensing ( Compressed Sensing , cs ) N theory , first propose
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采用函数法设计一FIR低通数字滤波器 ，，采样频率,阻带衰减不小于-50dB。-The function design FIR low-pass digital filter, the sampling frequency, stop-band attenuation of not less than-50dB.
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带通采样特点和仿真数字信号处理首先要把模拟信号变换为数字信号, 最常用的方法是采样, 奈奎斯特定律要求采样频率大于等于信号最
高频率的两倍, 对中心频率较高而频带较窄的信号使用奈奎斯特定律, 会造成采样频率很高同时有很多频段空白-Bandpass sampling characteristics and simulation of digital signal processing is first of all necessary for converting an analog sign
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包括信号的采样和恢复过程；采样频率的确定方法.
-Including sampling and recovery process signal method of sampling frequency.
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定位技术是无线传感器网络中关键的基础支撑技术, 目前提出了许多静态网络的节点定位算
法, 移动无线传感器网络的定位研究相对较少. 针对定位节点和参考节点随机运动的网络模型, 提出了
一个基于动态网格划分的蒙特卡罗定位算法. 算法中当接收的参考节点数超过一定阈值时使用最远距
离节点选择模型, 选出部分参考节点参与定位和信息转发, 节约能耗. 接着基于选择的或所有接收的参
考节点构建采样区域, 进行网格划分, 使用网格单元数计算最大采样次数, 在采样区域内采样并使用误
差补偿的运
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采样定理的验证，即采样信号的频率大于等于原信号频率的两倍时才能准确的恢复原信号-Verification sampling theorem, the sampling frequency of the signal frequency is greater than or equal to twice the original signal in order to accurately restore the original signal
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频谱混叠的情况及原因，：当周期T一定时，抽样频率越大，其采样的时间间隔越短，图像越逼真-Aliasing circumstances and reasons: when the period T is constant, the larger the sampling frequency, the sampling interval shorter, more lifelike images
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The goal is to eliminate the noise of ERP signals . This is done by Mtvstgyry signal . This question several recordings of ERP has given us and request that Mtvstgyry noise to delete the record . ERP-1 file sampling frequency of 256 Hz sample of 240
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qrs detection
give it a time axis
filter ECG
plot data
resample the signal in the Frequency domain at n times the original sampling frequency
upsample rate
-qrs detection
give it a time axis
filter ECG
plot data
r
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The main procedure of the experiment was to sample a signal with different sampling frequencies and observe the differences between them. This experiment is important for us because it aims to teach how to use matlab commands to reconstruct a sampled
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For a function that varying with time s(t) be a continuous function to be sampled, and sampling be performed by measuring the value of continuous function every T seconds, which is called sampling interval. This sampled function is given by S(nT),for
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In order to overcome sensitive defects of components deviations and environment defects in
analog circuit design, a novel four-dimensional hyperchaotic systems is constructed based on Lü system.
Basic nonlinear dynamics characteristics are analyz
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