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计算ARMA(p,q)模型的功率谱密度。
形参说明:
b——双精度实型一维数组,长度为(q+1),存放ARMA(p,q)模型的滑动平均系数。
a——双精度实型一维数组,长度为(p+1),存放ARMA(p,q)模型的自回归系数。
q——整型变量,ARMA(p,q)模型的滑动平均阶数。
p——整型变量,ARMA(p,q)模型的自回归阶数。
sigma2——双精度实型变量,ARMA(p,q)模型白噪声激励的方差。
fs——双精度实型变量,采样频率(Hz)。
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Routine mampres: To obtain amplitude response from h(exp(jw)).
input parameters:
h :n dimensioned complex array. the frequency response is stored
in h(0) to h(n-1).
n :the dimension of h and amp.
fs :sampling frequency (Hz).
iamp:If
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男性女性语音库+录音程序.m
录音时间 2秒
采样频率 fs=16000
采用精度 16bit-the male female voice recording procedures. M 2 seconds recording time sampling frequency fs = 16000 using a precision 6bit
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声卡采集的程序,可设置采样频率,位长,采样时间等参数.可采样8k-44.1kHz的信号,进行频谱分析.-sound card collection procedures, sampling frequency can be set up, elderly, Sampling time parameters. 8 k can be sampled - 44.1kHz signal spectrum analysis.
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myfft是一个自编matlab函数,将输入的采样频率个采样点数建立一个数据库后,取出表中的数据进行fft分析,绘制出时频波形进行比较分析-myfft self Matlab is a function of the input sampling frequency of 000 sampling points after the establishment of a database and extract table data fft analysis, time-frequency map
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DSB-SC信号的生成与解调 1) 用离散(DSP)的方法生成DSB信号 2) 载波频率为150KHz,音频为500Hz和2000Hz的混合音。 3) 加入高斯白噪声 (4) 语音信号 的传输。 改变抽样频率和量化台阶大小,观察重建信号以及量化噪声信号的波形;对于语音信号主观评价声音质量的变化。 -DSB-SC signal generation and demodulation 1) Discrete (DSP) methods to generate DSB signal 2) the ca
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录制自己的一段语音,时间控制在15秒到30秒左右;利用wavread函数对自己的语音进行采样,记住采样频率。
(1)画出原始语音信号的时域波形,而后以1秒为间隔,求出每秒数据的功率谱。
(2)根据语音信号特点,分别设计FIR及IIR滤波器,分别画出滤波器幅频和相频特性曲线。用设计的滤波器对信号滤波,画出滤波后时域波形。用sound函数回放语音信号。
(3)求出特征频段语音信号随时间变化的曲线(每间隔0.05秒求一次功率谱)。
-Record your own voice for
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利用FFT分析方波信号的频谱,讨论采样点数、采样频率对谱分辨率的影响。对数据叠加白噪声后再次分析实验结果。,Square-wave signal using FFT spectrum analysis to discuss the sampling points, the sampling frequency of the impact of spectral resolution. White noise superimposed on the data after analysis of e
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为带通滤波器,需设置半阶数、高低截止频率和采样频率。保存为function函数的m文件。rar中为一肌电信号。,For band-pass filter, to be set up semi-order, high and low cutoff frequency and sampling frequency. Save it as a function of m file function. rar for a EMG.
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数字信号处理综合设计
利用windows下的录音机录制一段自己的话音,时间控制在1秒左右;并对语音信号进行采样,理解采样频率、采样位数等概念。-Digital signal processing integrated design
Using Windows, making a video recorder under his voice, time control in 1 seconds And the voice signal sampling frequency sam
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平均周期图法和平滑平均周期图法估计功率谱
从经典功率谱估计周期图法原理入手,从理论上分析了其存在的局限性,借助Welch算法对其进行修正。依靠Matlab强大的数值分析和信号处理能力进行实验!!
用周期图法和welch法分别估计了一下信号的功率谱密度。采样频率200Hz,时间序列长度2048,FFT数据点数2048。其中welch法使用hanning窗,窗口长度600.-Average periodogram and periodogram smoothing method to est
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Simulink 实现的FM调制,载波13KHz,频偏3KHz,调制波形存为一个波形文件。FM解调采样双斜率鉴频,解调直接输出到声卡。-Simulink implementation of the FM modulation, carrier 13KHz, offset 3KHz, modulation waveform file saved as a waveform. FM demodulation of two-slope Kam sampling frequency, demodulat
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适合任何信号的模糊函数的画法。运行时要明白要要输入的那几个字母的实际含义。首先要将你的信号进行离散化,Signal elements(u_basic)就是你的信号矢量。Frequency coding in units of 1/tb你信号的采样频率,Over sampling ratio表示要满足采样定理(采样频率大于两边以上信号最高频率),其他的直接翻译过来就可以了
-Ambiguity function for any signal of painting. Run-time to
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对正弦信号进行简单的频谱分析,变换采样频率和信号持续时间-A simple sinusoidal signal spectrum analysis, changing the sampling frequency and signal duration
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ECGSYN generates a synthesized ECG signal with user-settable mean heart rate, number of beats, sampling frequency, waveform morphology (P, Q, R, S, and T timing, amplitude,and duration), standard deviation of the RR interval, and LF/HF ratio (a measu
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改变声音信号采样频率。应分别考虑由低到高和由高到低,最好包括声音采集和回放等功能。-To change the audio signal sampling frequency. Should be considered separately from low to high and high to low, preferably including audio capture and playback functions.
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通信信号相干调制解调源码 Fc=10 %载频
Fs=40 %系统采样频率
Fd=1 %码速率
N=Fs/Fd
df=10
numSymb=25 %进行仿真的信息代码个数
M=2 %进制数-Coherent modulation and demodulation of communication signal source Fc = 10 carrier frequency Fs = 40 systematic sampling frequency Fd = 1 co
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scr ipt for performance measurements for Carrier and Sampling Frequency
Offset Correction in OFDM Systems
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Multirate滤波器设计。模拟带通信号频率范围1KHz—1.1KHz,设计一个采样频率8KHz数字频谱分析系统,要求频率分辨率0.1Hz。-Multirate filter design. Analog bandpass signal frequency range 1KHz-1.1KHz, design a sampling frequency of 8KHz digital spectrum analysis system, required frequency resolution o
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分析带通采样定理的原理和实现过程,说明带通信号重构原始信号的方法,仿真给出不同采样频率和低通采样性能对比-By analyzing the principle and implementation process of the bandpass sampling theorem, the method of reconstructing the original signal with the signal is explained, and the performance comparison
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