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Description: 功率谱图子程序源码.经过实验,和大量阅读资料最好得到最好的一种算法.-power spectra subroutine source. Through experiments, and a large number of reading material should preferably be the best algorithm.
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Size: 34369 |
Author: 李晨 |
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Description: 功率谱图子程序源码.经过实验,和大量阅读资料最好得到最好的一种算法.-power spectra subroutine source. Through experiments, and a large number of reading material should preferably be the best algorithm.
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Size: 33792 |
Author: 李晨 |
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Description: The radially averaged power spectrum (RAPS) is the direction-independent mean spectrum, i.e. the average of all possible directional power spectra. This function computes and plots the RAPS of an input image. The function was written to produce the RAPS for square weather radar reflectivity images so you will have to relabel the plot axes and title to suit your needs. The radially averaged power spectrum provides a convenient means to view and compare information contained in 2D spectra in 1D
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Author: mid |
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Description: 加性高斯白噪声信道条件下的QPSK信号的调制与解调，观察了调制信号的功率谱图，输入输出信号图，已经时间误码率图与理论误码率的比较-Additive white Gaussian noise channel under the conditions of the QPSK signal modulation and demodulation, observed power spectra of modulated signals, input and output signal maps, plans have been time and theoretical bit error rate BER Comparison
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Size: 2048 |
Author: zhangwei |
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Description: 短时能量，端点检测，功率谱图与短时f变换，时域与f变换的matlab实现-Short-term energy, endpoint detection, and short-term power spectra of f transform, time-domain transform matlab with the realization of f
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Size: 2048 |
Author: 魏欢庆 |
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Description: 用均匀圆阵对信号进行方向估计，并仿真功率谱图。同时与均匀等距线阵进行比较，圆阵估计效果更好。-With uniform circular array direction of the signal estimates, and simulation of power spectra. At the same time with the uniform linear array were compared equidistant, round patches is estimated better.
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Size: 1024 |
Author: 牛炳旭 |
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Description: 通过最小二乘法及SVD-TLS法对同一谱进行了功率谱分析，并比较了不同阶数下，最小二乘法的效果-By least-squares method and SVD-TLS method to the same spectra of the power spectrum analysis, and compare the number of different bands under the effect of least-squares method
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Size: 1024 |
Author: 张云鹏 |
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Description: OFDM原理国外解释详细文档。及matlab实现。有时域、频域、相位、功率谱等图参照。-OFDM Principles of documents abroad, a more detailed explanation. And matlab implementation. Sometimes domain, frequency domain, phase, power spectra map reference.
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Size: 80896 |
Author: 夜思明 |
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Description: Energy and Power Spectra
It is frequently useful to study the distribution and power of a signal in the
frequency domain. For example, we may wish to have estimates for how the
power in a signal is distributed with frequency, so that we can quantitatively
state how much power is in a particular band of interest relative to other fre-
quencies. Given a power spectral density function, the power is then given by
the integral of the function over the band of interest.
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Size: 330752 |
Author: wag |
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Description: 优秀论文及配套源码。Hilbert-Huang变换(HHT)是一种新的非平稳信号处理技术，该方法由经验模态 分解(EMD)与Hilbert谱分析两部分组成。任意的非平稳信号首先经过EMD方法处理后被分解为一系列具有不同特征尺度的数据序列，每一个序列称为一个固有模态函数(IMF)，然后对每个IMF分量进行Hilbert谱分析得到相应分量的Hilbert谱，汇总所有Hilbert谱就得到了原信号的谱图。该方法从本质上讲是对非平稳信号进行平稳化处理，将信号中真实存在的不同尺度波动或趋势逐级分解出来，最终用瞬时频率和能量来表征原信号的频率含量。
本文研究了基于HHT的暂态电能质量扰动检测方法，介绍了HHT的基本原理和利用HHT检测电能质量多扰动信号的实现方法。仿真试验表明该方法可以实时检测扰动的起止时刻，持续时间和扰动幅度，适用于电能质量多扰动的监测和辨识系统。
-Hilbert-Huang Transform(HHT) is a new non-stationary signal processing technology，including the Empirical Mode Decomposition(EMD) and Hilbert spectral analysis．In this method，arbitrary non-stationary signals was divided into a series data sequence with different characteristic scales after the first EMD treatment，each sequence is called an intrinsic mode function(IMF)，and then each IMF component gained corresponding the Hilbert spectrum though Hilbert spectrum analysis，a summary of all Hilbert spectrum assembled to the spectra of the original signal．In essence，this method is a stable processing for non-stationary signal，which decomposed the different fluctuations or trends in the signal in rum，and represented the frequency content of the original signal using the final instantaneous frequency and energy．
This paper study a method to detect power quality disturbances based on the HHT，in which the principle and the realization of the HHT and the realization of power quality disturbance
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Author: NBB |
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Description: Keyboard-controlled interactive power spectrum demonstrator, useful for teaching and learning about the power spectra of different types of signals and the effect of signal duration and sampling rate. Single keystrokes allow you to select the type of signal (12 different signals included), the total duration of the signal, the sampling rate, and the global variables f1 and f2 which are used in different ways in the different signals. When the Enter key is pressed, the signal (y) is sent to the Windows WAVE audio device. Press K to see a list of all the keyboard commands.
T. C. O Haver
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Size: 4096 |
Author: nivalis |
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Description: 声音处理的MATLAB程序：DISTISPF -calculates the Itakura-Saito spectral distance between power spectra
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Size: 2048 |
Author: 苏 |
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Description: Its a research paper from ieee In this letter, analytical expressions are derived for
the power spectral density (PSD) of orthogonal frequency division
multiplex (OFDM) signals employing a cyclic prefix (CP-OFDM)
or zero padding (ZP-OFDM) time guard interval. Under the relatively
weak assumptions that i) the data are independent and identically
distributed on all OFDM subcarriers and ii) the OFDM
pulse shape is sufficiently localized in time, simple closed-form PSD
expressions can be obtained. These expressions are then compared
to existing OFDM PSD expressions and validated by inspecting the
power spectra of some standardized OFDM signals.
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Author: payal |
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Description: Abstract: Randomized modulation is of increasing interest in power
electronics and also holds promise for reducing filtering requirements
in ac/ac, dc/dc converter application and reducing acoustic noise in
motor drive applications. This paper deals with the power spectrum
density (PSD) estimation methods of the random controlled pulse
width modulation (RPWM) single-phase structured boost rectifier.
Estimated PSD is also experimentally verified. The switch-mode
operation of the converter results in Electromagnetic Interference
(EMI) which is produced due to large di/dt and dv/dt. In addition to
all steps to minimize the generation of EM1 (i.e. introduction of
RPWM), improvement of power spectra will also be considered.
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Size: 337920 |
Author: venkatesh |
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Description: 通过VOSS变换以及FFT计算出功率谱图的程序，方便实用，内含数据供验证-By VOSS transform and FFT power spectra calculated procedure, convenient and practical
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Size: 10240 |
Author: nick |
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Description: 大气统计方法作业 对给定数据进行功率谱分析 并画出功率谱图-For a given power spectrum analysis of the data and draw the power spectra
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Size: 6144 |
Author: 宝宝 |
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Description: 2个余弦信号和一个随机信号相加的功率谱比较-2 cosine signal and a random signal is the sum of the power spectra for
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Size: 1024 |
Author: 孙记树 |
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Description: 1．用Matlab产生正弦波,矩形波,以及白噪声信号，并显示各自时域波形图
2．进行FFT变换，显示各自频谱图，其中采样率，频率、数据长度自选
3．做出上述三种信号的均方根图谱,功率图谱,以及对数均方根图谱
4．用IFFT傅立叶反变换恢复信号，并显示恢复的正弦信号时域波形图- 1. Using Matlab generated sine wave, square wave, and the white noise signal, and displays the respective time-domain waveform 2. The FFT transform, showing each spectrum, where the sampling rate, frequency, data length choice 3. Rms signal to make the three maps, power spectra, as well as the number of rms spectra 4. With the inverse Fourier transform IFFT restore the signal and displays the recovered time-domain waveform sinusoidal signal
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Size: 1024 |
Author: 李杰 |
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Description: 显示地震记录的功率谱的MATLAB源代码，地球物理专业学生的信号功率谱显示工具。- Basic seismic data QC
Use plotseismic.m to plot data, i.e. have plotseismic.m script in the same directory
Display power spectra
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Size: 1024 |
Author: shao |
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Description: power spectra density of the signal
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Size: 600064 |
Author: srinivas |
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