Description: vc#下实现的不同频率选择的滤波器，包括FFT变换，各种滤波算法， 如果你要编写数字信号处理相关的程序，-vc# under the different frequency-selective filters, including the FFT transform, all kinds of filtering algorithm, if you had to prepare a digital signal processing-related procedures, Platform: |
Size: 11264 |
Author:耿亮 |
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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: 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: 一种短波高速QAM信号快速无抖动码元同步方案的设计,文章基于Gardner定时误差检测算法、预滤波和一阶过零检测锁相环理论,结合卡尔曼
滤波算法,设计了一种快速无抖动的短波高速QAM信号全数字解调码元同步方案,从理论上
推导了方案中各个参数的设置方法,并在不同的信道环境下测试算法的性能,仿真结果显示
该方案具有优良的性能。
-A short high-speed QAM signal symbol timing quickly without jitter in the design, the article based on Gardner timing error detection algorithm, pre-filter and the first zero-crossing detection of phase-locked loop theory, Kalman filtering algorithm, a fast no-jitter design short-wave high-speed digital QAM signal demodulation symbol synchronization scheme, the program derived from the theory, each parameter setting methods, and the environment in different channels to test the algorithm performance, simulation results show that the scheme has excellent performance. Platform: |
Size: 191488 |
Author:longx |
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Description: tms320c6711 is texas instruments digital signal processor .The given book explains how to use ccs and write some simple applications such as sine wave generation,audio filtering ,image loading.
Very useful resource for developers Platform: |
Size: 3197952 |
Author:nilesh |
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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: 成形滤波可以在调制后对调制波以带通滤波方式完成，也可以在调制前对基带以低通滤波方式完成，两者的效果是相同的。在现代全数字调制解调器中，成形滤波器大都采用数字滤波器来实现。由于对基带信号进行数字滤波更为方便，因此成形滤波普遍采用基带数字滤波方案。-Shaping filter can be modulated by the modulation wave band-pass filtering is accomplished, it can before the modulation baseband low-pass filter manner, both results are the same. In the modern all-digital modem, the shaping filter most of the digital filters. Because of the digital baseband signal filtering more convenient, so forming a baseband filter commonly used digital filtering scheme. Platform: |
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Author:尤恺元 |
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Description: 1． 学习用DSP用户开发板产生信号混叠的方法和目的。
2． 熟悉数字滤波的基本原理和实现方法。
高频正弦波和低频正弦波的混叠信号，送入TLV320AD50进行A/D变换，IIR低通滤波器滤波，经D/A输出低频正弦波信号。-1. Learning DSP user development board signal aliasing method and purpose. 2. Familiar with the basic principles and implementation of digital filtering method. Mixing signals of the high-frequency sine-wave and low-frequency sine wave fed TLV320AD50 performs A/D conversion, IIR low-pass filter, a low-frequency sine wave signal by the D/A output. Platform: |
Size: 65536 |
Author:张瑞云 |
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Description: 对输入双极性NRZ和数字序列，经过方波滤波和理想低通滤波后的输出和抽样输出。-Bipolar NRZ and the input digital sequence, the ideal square-wave filter and the output of low-pass filtering and sampling output. Platform: |
Size: 1024 |
Author:天海 |
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Description: Matlab 模拟声波传数，包括基带调制、数字上变频、数字下变频、滤波、译码等-Matlab to simulate the sound wave number, including baseband modulation, digital frequency conversion, digital frequency conversion, filtering, decoding, etc Platform: |
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Author:尹仁超 |
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Description: 使用低通滤波器从含有噪声的信号中提取有用的正弦波
(见实验指导书 实验九 数字滤波器中的第一题)
目的：用数字滤波器从含有高频噪声的采样数据中提取正弦信号。
要求：①输入信号为一正弦波，并加入一个白噪声的干扰来模拟信号传输中的随机干扰信号（用以模拟含有噪声采样序列）。
（模拟含有噪声采样序列具体可用正弦波信号叠加高频噪声来实现，为了使滤波效果明显，本实验的高频噪声是用高频均匀分布白噪声（Uniform）通过Butterworth高通滤波器过滤生成的，高通滤波器的截止频率设为10倍输入信号频率。）
②在程序中设计一个低通巴特沃斯滤波器，以滤除信号中的噪声分量，提取输入的正弦波信号 。
③可调节信号滤波器的截止频率和阶数，可显示滤波前与滤波后的时域信号。
④给出滤波前与滤波后的频谱特性的显示。
-Using low pass filter extracting useful sine wave signal containing noise(see experiment instruction digital filter in the first nine questions)Objective: to use digital filter sampling data extract containing high frequency noise sine signal.Requirements: (1) the input signal is a sine wave, and add a white noise interference to simulate the random disturbance signal of the signal transmission (to simulate contains noise sampling sequence).(simulated the sampling sequence contains noise available sine wave signal superposition of high frequency noise, in order to make the filtering effect is obvious, the experiment of high frequency noise is Uniform distribution with high frequency white noise (Uniform) by Butterworth high-pass filter to filter generated, high-pass filter cutoff frequency set to 10 times the size of the input signal frequency.)(2) in the program design a low-pass butterworth filter, in order to filter out the noise in the signal component, extract the input sine wav Platform: |
Size: 275456 |
Author:xy |
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Description: 时间序列数据分析中的梅林变换工具，FMCW调频连续波雷达的测距测角，有较好的参考价值，对信号进行频谱分析及滤波，包含光伏电池模块、MPPT模块、BOOST模块、逆变模块，实现了对10个数字音的识别程。- Time series data analysis Mellin transform tool, FMCW frequency modulated continuous wave radar range and angular measurements, There are good reference value, The signal spectral analysis and filtering, PV modules contain, MPPT module, BOOST module, inverter module, Realization of 10 digital audio recognition progra. Platform: |
Size: 5120 |
Author:bqxvfk |
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