Description: 1． 利用自相关函数法和周期图法实现随机信号的功率谱估计。
2． 观察数据长度、自相关序列长度、信噪比、窗函数、平均次数等对谱估计的分辨率、稳定性、主瓣宽度和旁瓣效应的影响。
-1. The use of auto-correlation function method and cycle map Method random signal power spectrum estimation. 2. Observation data length, the length of autocorrelation sequence, the signal to noise ratio, window function, the average frequency of the spectrum estimation resolution, stability, width and the main valve Sidelobe effects. Platform: |
Size: 6072 |
Author:开心 |
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Description: 利用周期图法对序列的功率谱进行估计。数据窗采用汉明窗。假设在白噪声中分辨这三个不同频率的正弦信号,其相位是均匀分布在2PI的独立随机变量,而 是一个单位白噪声.生成50个长度为N=512的 的样本序列集合。
-use map cycle sequencing method of the power spectrum estimation. Data window using Hamming window. Assume that the white noise to differentiate between the three different frequency sinusoidal signal, its phase is uniformly distributed in the PI two independent random variables. but a flat white noise. Generating 50 length N = 512 samples of the sequence set. Platform: |
Size: 896 |
Author:lee |
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Description: 信号与系统基础知识包括连续信号与模型、离散信号与模型；常用信号变换包括Z变换、Chirp Z变换、FFT变换、DCT变换和Hilbert变换等；离散系统结构包括IIR、FIR和Lattice结构；IIR滤波器设计包括模拟和数字低通、高通、带通与带阻滤波器设计，以及基于冲激响应不变法和双线性Z变换法的IlR滤波器设计等；FIR滤波器设计包括基于窗函数、频率抽样法和切比雪大逼近法的FIR滤波器设计；平稳信号分析包括经典功率谱估计、基于参数模型的功率谱估计和基于非参数模型的功率谱估计；非平稳信号分析包括STFT变换、Gabor展开、Wigner-Ville分布与Choi-Williams分布；非高斯信号分析包括基于非参数法的双谱估计、基于参数模型的双谱估计，以及双谱估计的应用；信号处理的GUI实现包括滤波器设计与分析的FDATool工具和滤波器设计与信号分析的SPTool工具。-signals and systems based on knowledge, including continuous signal with the model, discrete signal and model; Common signals include transform Z transform, chirp Z-transform, FFT transform. DCT and Hilbert transform; Discrete system architecture including IIR, FIR and Lattice structure; IIR filter design, including analog and digital low-pass, high-pass, band-pass and band stop filter design, Based on the impulse response of the same law and bilinear Z transform the IlR filter design; FIR filter design including on the basis of the window function, frequency sampling and snow all over the big approximation of FIR filter design; stationary signal analysis include classical power spectrum estimation, Based on the model parameters of the power spectrum estimation and non - parametric model b Platform: |
Size: 101182 |
Author:james |
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Description: 基于阵列天线的CAPON和MUSIC频率谱估计仿真分析比较-Array antenna based on the Capon and MUSIC frequency spectrum estimation Simulation Analysis and Comparison Platform: |
Size: 1024 |
Author:袁峰 |
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Description: 为解决直接序列扩频系统的数字收发机中初始频率的捕获问题，提出了一种通过DFT变换，在频域
上进行抛物插值运算的频偏估计的算法。该算法可适应低信噪比、宽频率偏移范围的恶劣通信环境和突发的通信
模式，且算法复杂度较低。该算法已在FPGA 中实现。-To address the direct sequence spread spectrum system, the number of transceivers in the initial frequency of the capture problem, a transformation through the DFT, in the frequency domain for parabolic interpolation computing frequency offset estimation algorithms. The algorithm can be adapted to low signal to noise ratio, broadband rates offset the scope of bad communications environment and unexpected modes of communication, and the algorithm complexity low. The algorithm has been realized in the FPGA. Platform: |
Size: 63488 |
Author:赵平 |
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Description: MUSIC谱估计程序，可以对信号进行频率估计，DOA估计，谱估计-MUSIC spectrum estimation procedure can be carried out on the signal frequency estimation, DOA estimation, spectrum estimation Platform: |
Size: 1024 |
Author:xu |
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Description: MPSK信号基于高阶循环谱估计载波频率matlab的代码-MPSK signals based on higher-order cycle of the carrier frequency spectrum estimation matlab code Platform: |
Size: 1024 |
Author:徐哲 |
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Description: 很好的空间music谱估计的例子 空间傅里叶变换-A good example of space music spectrum estimation Fourier transform space Platform: |
Size: 1024 |
Author:何奎 |
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Description: 本次实验主要是对一个正弦信号加入高斯白噪声，然后通过傅里叶变换对正弦信号进行谱估计。最后要用matlab进行仿真，得到正弦函数的时域和频域波形，关键找出信噪比和正弦信号频谱的均方误差之间的关系。-The experiment is a sinusoidal signal which is to white Gaussian noise, then by Fourier transform of the sinusoidal signal spectrum estimation. Finally, using the matlab simulation, sine function in time domain and frequency domain waveforms. Platform: |
Size: 39936 |
Author:zjc |
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Description: 信号时正弦波加正态零均值白噪声，信噪比10db，信号频率2kHZ，采样频率100kHZ，数据长度N=256。
(1). 用周期图法进行谱估计。-Sine wave signal plus zero-mean normal white noise, SNR 10db, frequency 2kHZ, sampling frequency 100kHZ, data length N = 256.
(1) with the periodogram spectral estimation. Platform: |
Size: 11264 |
Author:郭子子 |
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Description: MPSK信号基于高阶循环谱估计载波频率matlab的代码,可以更好的理解循环谱的相关理论-MPSK signals based on higher order loop carrier frequency spectrum estimation matlab code, you can better understand the theory of cyclic spectrum Platform: |
Size: 2048 |
Author:jason |
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Description: 负正弦加白噪声随机过程下使用MUSIC方法进行信号频率估计仿真，信号样本数去1000，估计的自相关矩阵为8阶，分别采用AIC和MDL准则估计信号源个数，并画出相应的MUSIC频率估计谱线。-Negative sine plus white noise random process method using MUSIC frequency estimation simulation, signal samples to 1000, the estimated autocorrelation matrix of order 8, AIC and MDL criteria were used to estimate the number of signal sources, and draw the corresponding MUSIC frequency spectrum estimation. Platform: |
Size: 9216 |
Author:zxf |
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Description: （1）采用AIC和MDL准则估计信号源个数；
（2）根据（1）中信源个数画出相应的MUSIC频率估计谱线。
-(1) using the AIC and MDL sources estimate the number of criteria
(2) according to (1) the number of sources of CITIC MUSIC draw the corresponding frequency spectrum estimation. Platform: |
Size: 3072 |
Author:蔡蓉 |
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Description: BPSK载频估计，用它的平方谱和四次方谱进行估计，能够在0dB情况下完成有效估计-BPSK carrier frequency estimation, with its squared spectrum and quartic spectrum estimation can be completed in the 0dB case valid estimation Platform: |
Size: 1024 |
Author:贺辉刚 |
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Description: 功率谱估计是利用有限长的数据估计信号的功率谱，广泛应用于各个领域。功率谱估计主要分为经典谱估计与现代谱估计。常用的经典谱估计方法有周期图法，相关法，周期图的改进法，常用的现代谱估计方法有最大熵谱估计，AR模型，MA模型，ARMA模型。经典谱估计适用于长序列的信号，其主要缺陷是描述功率谱波动的数字特征方差性能差，频率分辨率低，现代谱估计适用于短序列的信号，旨在改善谱估计的分辨率，并将其应用于实际地震资料的谱分析。
-Power spectrum estimation is the use of a finite length data to estimate the power spectrum of the signal, widely used in various fields. Power spectrum estimation is divided into classic and modern spectral estimation spectral estimation. Commonly used methods of classical periodogram spectrum estimation method, the relevant law, the cycle graph Improvement Act, commonly used in modern spectral estimation methods have maximum entropy spectral estimation, AR model, MA model, ARMA model. Classical spectral estimation applied to signal a long sequence, its main drawback is the fluctuation power spectrum describing digital signature variance performance is poor, the frequency resolution is low, modern spectral estimation applied to signal short sequences designed to improve spectral estimation resolution, and The analysis applied to real seismic data spectrum. Platform: |
Size: 3072 |
Author:裴忠林 |
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Description: 功率谱估计
信号为两个正弦信号加高斯白噪声，各正弦信号的信噪比均为10dB，长度为N，信号频率分别为 和 ，初始相位 ，取 ， 取不同数值：0.3，0.25。 为采样频率。分别用Levinson递推法和Burg法进行功率谱估计，并分析改变数据长度、模型阶数对谱估计结果的影响。-Power spectrum estimation signal into two sinusoidal signals applied Gaussian white noise, the SNR of each sinusoidal signal are 10dB, a length of N, respectively, and the signal frequency, initial phase, take, take different values: 0.3,0.25. Is the sampling frequency. Levinson recursive method were used and Burg method for power spectrum estimation, and change the length of the data analysis, the impact on the estimation model order spectrum. Platform: |
Size: 1024 |
Author:gongzhizhen |
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Description: 分别使用MVDR、Root-Music和ESPRIT三种方法对信号频率估计进行仿真实验，其中噪声为复正弦加性白噪声，给出正弦信号频率的估计值。-Using MVDR, Root- Music and ESPRIT three methods to estimate the signal frequency simulation experiment respectively, which is suitable for complex sinusoidal additive white noise noise, sine signal frequency estimate is given. Platform: |
Size: 2048 |
Author:周小V |
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Description: 功率谱估计的目的是根据有限的数据给出信号、随机过程的频率成分分布。程序给出了功率谱估计的方法，并详细描述-The purpose of the power spectrum estimate is based on limited data given signal, the frequency component distribution of random process. Program gives the power spectrum estimation methods, and described in detail Platform: |
Size: 1024 |
Author:林松龙 |
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