Description: 本次设计的数字基带成形滤波器参照IS-95标准进行设计，对输入信号进行4倍过采。IS-95标准为：其中通带频率为590Khz，通带的链波大小1.5dB，截止带的频率为740Khz，截止带的衰减量为40dB，传输的数据率为1.2288Mhz，传输的频宽为1.25Mhz。-The design of the digital base-band shaping filter with reference to IS-95 standard design, the input signal to 4 times over mining. IS-95 standards as follows: one pass-band frequency is 590Khz, passband wave the size of the chain of 1.5dB, closing with the frequency of 740Khz, closing with attenuation of 40dB, the data transmission rate of 1.2288Mhz, transmission bandwidth for 1.25Mhz. Platform: |
Size: 91136 |
Author:刘强 |
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Description: 介绍了一种用于心电监护的数字滤波算法，对滤波器的设计，包括滤波原理、整系数数字滤波器
的波型特征、实现方框图及10 点平均数字滤波器进行了分析，并给出心电信号的滤波效果图。实验结果表明，
该算法能有效滤除基线漂移和工频干扰，算法简单实用。-A new method for the introduction ECG digital filtering algorithm, the design of filters, including filtering principle, the whole coefficient of the wave digital filter characteristics, block diagram and realize an average 10-point digital filters are analyzed, and gives ECG filtering effect of Fig. Experimental results show that the algorithm can effectively filter out the baseline drift and power-line interference, the algorithm is simple and practical. Platform: |
Size: 345088 |
Author:方高明 |
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Description: 一个数字滤波器波形测试的源代码，对于有需要的朋友还是不错的-A digital filter wave test source code, there is a need for a friend or good Platform: |
Size: 1896448 |
Author:liuwei |
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Description: 数字信号处理FPGA实现 实用程序和文件,有sine.exe ---输入宽度。输出对应的正弦波表 mif文件
csd.exe --- 寻找整数和分数的标准有符号数字量（canonical signed digit ，CSD）表达式程序
fpinv.exe --- 倒数计算浮点数表的程序
dagen.exe ---分布式算法文件生成HDL" onclick="tagshow(event)" class="t_tag">VHDL代码的程序
cic.exe ---CIC滤波器计算参数的程序
-Digital Signal Processing FPGA realization of practical procedures and documents, there are sine.exe--- input width. Sine wave output of the corresponding csd.exe--- Table mif file to find the integer and fractional number of the volume of standard symbols (canonical signed digit, CSD) Expression Programming fpinv.exe--- countdown procedures for calculation of floating-point form dagen.exe--- documents distributed algorithm to generate HDL " onclick =" tagshow (event) " class =" t_tag " > VHDL program code cic.exe--- CIC filter process parameters Platform: |
Size: 260096 |
Author:kevin |
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Description: pid控制单片机编程 DA模块两路（OUT1、OUT2）输出三角波经AD10次采样并与
之比较经数字滤波、双闭环PID调节后PWM生成以及经逆变后
电压控制-pid control of single-chip programming two-way DA module (OUT1, OUT2) output triangle wave by AD10 and compared with samples by the digital filter, double-loop PID regulator as well as after the PWM inverter generates voltage control after Platform: |
Size: 3072 |
Author:jiasong |
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Description: 基于MATLAB的FIR带阻数字滤波器的设计
由于生物医学信号处理过程中易混入50Hz噪声的特点，本文利用程序设计法和FDATool设计法，设
计一带阻滤波器，并将设计的滤波器应用到一混和正弦信号，通过测试检验，该滤波器可以很好地消除50Hz的工
频干扰。-】To prevent the biomedical signals from being disturbed by 50Hz noise easily，the paper designs a
bandstop digital filter by procedure and FDATool method．The filter is tested by a blended 81ne wave experimentally and the
result shows that the filter can cancel the 50Hz noise very well． Platform: |
Size: 218112 |
Author:吕大 |
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Description: 单片机做的数字滤波器，用于将50Hz方波滤成正弦波，1000Hz采样。附带Proteus仿真文件。-The single-chip digital filter used to filter into a sine wave 50Hz square wave, 1000Hz sampling. Proteus simulation document attached. Platform: |
Size: 266240 |
Author:黄天乐 |
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Description: 低通切比雪夫I型数字滤波器阶数为7阶 在2000Hz通带表现截止在2500Hz阻带边界在过渡带和阻带之间是单调下降波形.
-Low-pass Chebyshev Type I digital filter order is 7 in the 2000Hz band pass-band cut-off at 2500Hz stopband performance in the transition zone and the boundary between the monotonic decline in stopband wave. Platform: |
Size: 1024 |
Author:xbwu1 |
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Description: 地震资料数字处理方法，应用中值滤波方法滤除地震记录上面波等线性干扰，并提取出线性干扰-Digital seismic data processing application method of median filtering to filter out seismic waves records of the above and other linear interference, such as surface wave Platform: |
Size: 5120 |
Author:huhuafeng |
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Description: (1)设计一个数字低通滤波器．设计指标如下：
通带内幅度衰减人大于1dB
阻带内幅度衰减大于15dB
(2)编制计算设计的数字滤波器幅度特性与相位特性程序，并进行实验验证；
(3)编制实现该数字滤波器程序并且模拟实现数字滤波
①分别让满足所设计滤波器的通带、过滤带、阻带频率特性的正弦波通过滤波器，验证滤波器性能。
②改变正弦抽样时间，验证数字低通滤波器的模拟截止频率是抽样时间的函数。-(1) Design a digital low-pass filter. Design specifications are as follows: pass-band attenuation range of people within a range greater than 1dB stopband attenuation greater than 15dB (2) the preparation of calculation and design of digital filter amplitude characteristics and phase characteristics of processes and experimental verification (3) the preparation of implementation of the digital filter program and simulate digital filtering ① were designed to meet the pass-band filter, filter belt, stop-band frequency characteristics of the sine wave through the filter, verify the filter performance. ② change the sine sampling time, verify that the number of analog low-pass filter cutoff frequency is the sampling function of time. Platform: |
Size: 159744 |
Author:lm |
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Description: Script to design an IIR Filter low pass using Butterworth & lineal transformation to convert
from analogic to digital a prototype filter.
by actinio vjgonzalezg@gmail.com :)
It plots:
1-Frecuency response of the filter impulse.
2-Magnitude response of the filter.
3-phase of the frecuency response.
4-Error of aproximation in bands.
It determines error of máximun aproximation on each band and the RMS value for the reject and pass band respectively
then, obtains plots of the first 50 samples for the following entries:
a)An rectangular pulse as the half of the longitud of the filter in n=0
b)A senoidal wave with amplitude =1 & frecuency 0.2 Fs.
c)A senoidal wave with amplitude = 1. & frecuency= 0.25 Fs.
d)A senoidal wave with amplitude = 1. & frecuency= 0.375 Fs.-Script to design an IIR Filter low pass using Butterworth & lineal transformation to convert
from analogic to digital a prototype filter.
by actinio vjgonzalezg@gmail.com :)
It plots:
1-Frecuency response of the filter impulse.
2-Magnitude response of the filter.
3-phase of the frecuency response.
4-Error of aproximation in bands.
It determines error of máximun aproximation on each band and the RMS value for the reject and pass band respectively
then, obtains plots of the first 50 samples for the following entries:
a)An rectangular pulse as the half of the longitud of the filter in n=0
b)A senoidal wave with amplitude =1 & frecuency 0.2 Fs.
c)A senoidal wave with amplitude = 1. & frecuency= 0.25 Fs.
d)A senoidal wave with amplitude = 1. & frecuency= 0.375 Fs.
Platform: |
Size: 2048 |
Author:actinio |
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Description: In most cases, a bandpass filter characteristic
is obtained by using a lowpass-to-bandpass frequency
transformation on a known lowpass transfer function. This
frequency transformation controls the location of passband
edges and transfer zero frequencies completely. Using the
“Vlach-Chebyshev approximation” [1] however, we are
able to specify the (Chebyshev) passband limits directly,
together with a free choice of transfer zero locations in the
stopband. In this way it is possible to design bandpass
transfer functions that cannot be obtained from lowpass
functions by a frequency transformation. We think this
method to be the only (and not very well known) analytical
method to obtain such bandpass characteristics. We show
how we designed wave digital realizations from the specification,
through a VHDL description and synthesis into a
Xilinx FPGA (Virtex-II). Platform: |
Size: 195584 |
Author:rakesh |
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Description: 在信号处理中，信号发射时，信号通过载波，调制，以电磁波的形式发射出来
在接收端，射频信号通过天线接收，超外差式等方式进行处理，变频到中频
然后通过数字技术对中频信号进行处理，此时的中频信号采样率很高，多达几十兆赫
而要解调出来的信号很小，此时就要经过滤波来得到我们需要的信号
如果直接设计滤波器，阶数会非常庞大，软件，硬件设备都承受不了
因此，一般常用的技术是进行下变频处理，其主要技术就是通过抽取滤波进行下变频
常用的滤波器就是CIC抽取, 希望可以帮助一些坛友解决基本的问题。
-In signal processing, signal emission, signal through the carrier, in the form of electromagnetic wave modulation, launched
In the receiver, rf signals through the antenna, specialized superheterodyne type means such as processing, the frequency conversion to intermediate frequency
Then through digital technology of intermediate frequency signal processing, at this time of intermediate frequency signal sampling rate is very high, as many as several decades MHZ
But the signal demodulation out is very small, at this time would be passing filter to get what we need signal
If design directly filter, order number be colossal, software, hardware equipment all suffer
Therefore, the technology is usually used for down-transducer processing, its main technical is by extracting filtering down-transducer
Commonly used filter is CIC extraction, the hope can help some friends solve basic problems of the altar. Platform: |
Size: 1024 |
Author:wangheyi |
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Description: 数字基带系统将数字信号从时域上看时数字滚降，需要画出滚降前后的波形展示出来。频域上带宽变化了。输入滤波器之前的波形与采样判决之后的波形。采样判决前的频谱。
采样判决后的码型。
2、眼图（采样判决之前的眼图）（信噪比大眼图清晰）
3、误码曲线，（横坐标时信噪比，纵坐标时误码率）
4、Arfa变化对误码特性的影响，变好还是变差(变好)，眼图清晰度变化（清晰），传递函数的带宽的变化。（带宽越大）-1.Digital baseband system point of view the digital signal from the time domain when the number of roll-off, you need to draw the waveform displayed before and after the roll-out. The frequency domain, the bandwidth change. Input filter and sample ruling before the wave after wave. Sample pre-judgment spectrum.
Sampling pattern after the verdict.
2, the eye diagram (eye before sampling decision) (SNR big eye clear)
3, the error curve (abscissa when the signal to noise ratio, bit error rate when the vertical axis)
4, Arfa impact of change on BER performance, get better or worse (getting better), change of eye-definition (clarity), the transfer function of the bandwidth changes. (The greater the bandwidth) Platform: |
Size: 2048 |
Author:sk |
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Description: 波数字滤波器的实现.
用Matlab设计与模拟一个约线性相位滤波器组-Wave digital filter implementation. A design and simulation using Matlab approximately linear phase filter banks Platform: |
Size: 26624 |
Author:li |
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Description: MATLAB濾波器設計
運用matlab函式將類比綠波器轉成數位濾波器
善用了ellip 及 bilinear 還有 tf2sos 函式
因為有展成sos形式,式和實際上濾波器的設計應用,並附上對講機應用之ctcss濾波器處理程式-MATLAB Filter Design use matlab function analog green wave is converted to a digital filter to make good use of the the ellip and bilinear There tf2sos of function developed into sos form of style and actually filter design application, together with a walkie-talkie the application of ctcss filter processing program Platform: |
Size: 1024 |
Author:amazing |
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Search - wave digital filter