gusucode.com > 信号处理工具箱 - signal源码程序 > signal\signal\signal\Contents.m
% Signal Processing Toolbox.
% Version 4.2 (R11) 10-Jul-1998
%
% What's new.
% Readme - New features, bug fixes, and changes in this version.
%
% Filter analysis and implementation.
% abs - Magnitude.
% angle - Phase angle.
% conv - Convolution.
% fftfilt - Overlap-add filter implementation.
% filter - Filter implementation.
% filtfilt - Zero-phase version of filter.
% filtic - Determine filter initial conditions.
% freqs - Laplace transform frequency response.
% freqspace - Frequency spacing for frequency response.
% freqz - Z-transform frequency response.
% grpdelay - Group delay.
% impz - Impulse response (discrete).
% latcfilt - Lattice filter implementation.
% sgolayfilt - Savitzky-Golay filter implementation.
% sosfilt - Second-order sections (biquad) filter implementation.
% unwrap - Unwrap phase.
% upfirdn - Up sample, FIR filter, down sample.
% zplane - Discrete pole-zero plot.
%
% FIR filter design.
% convmtx - Convolution matrix.
% cremez - Complex and nonlinear phase equiripple FIR filter design.
% fir1 - Window based FIR filter design - low, high, band, stop, multi.
% fir2 - Window based FIR filter design - arbitrary response.
% fircls - Constrained Least Squares filter design - arbitrary response.
% fircls1 - Constrained Least Squares FIR filter design - low and highpass.
% firls - FIR filter design - arbitrary response with transition bands.
% firrcos - Raised cosine FIR filter design.
% intfilt - Interpolation FIR filter design.
% kaiserord - Window based filter order selection using Kaiser window.
% remez - Parks-McClellan optimal FIR filter design.
% remezord - Parks-McClellan filter order selection.
% sgolay - Savitzky-Golay FIR smoothing filter design.
%
% IIR digital filter design.
% butter - Butterworth filter design.
% cheby1 - Chebyshev type I filter design.
% cheby2 - Chebyshev type II filter design.
% ellip - Elliptic filter design.
% maxflat - Generalized Butterworth lowpass filter design.
% yulewalk - Yule-Walker filter design.
%
% IIR filter order selection.
% buttord - Butterworth filter order selection.
% cheb1ord - Chebyshev type I filter order selection.
% cheb2ord - Chebyshev type II filter order selection.
% ellipord - Elliptic filter order selection.
%
% Analog lowpass filter prototypes.
% besselap - Bessel filter prototype.
% buttap - Butterworth filter prototype.
% cheb1ap - Chebyshev type I filter prototype (passband ripple).
% cheb2ap - Chebyshev type II filter prototype (stopband ripple).
% ellipap - Elliptic filter prototype.
%
% Frequency translation.
% lp2bp - Lowpass to bandpass analog filter transformation.
% lp2bs - Lowpass to bandstop analog filter transformation.
% lp2hp - Lowpass to highpass analog filter transformation.
% lp2lp - Lowpass to lowpass analog filter transformation.
%
% Filter discretization.
% bilinear - Bilinear transformation with optional prewarping.
% impinvar - Impulse invariance analog to digital conversion.
%
% Linear system transformations.
% latc2tf - Lattice or lattice ladder to transfer function conversion.
% residuez - Z-transform partial fraction expansion.
% sos2ss - Second-order sections to state-space conversion.
% sos2tf - Second-order sections to transfer function conversion.
% sos2zp - Second-order sections to zero-pole conversion.
% ss2sos - State-space to second-order sections conversion.
% ss2tf - State-space to transfer function conversion.
% ss2zp - State-space to zero-pole conversion.
% tf2latc - Transfer function to lattice or lattice ladder conversion.
% tf2sos - Transfer Function to second-order sections conversion.
% tf2ss - Transfer function to state-space conversion.
% tf2zp - Transfer function to zero-pole conversion.
% zp2sos - Zero-pole to second-order sections conversion.
% zp2ss - Zero-pole to state-space conversion.
% zp2tf - Zero-pole to transfer function conversion.
%
% Windows.
% bartlett - Bartlett window.
% blackman - Blackman window.
% boxcar - Rectangular window.
% chebwin - Chebyshev window.
% hamming - Hamming window.
% hanning - Hanning window.
% kaiser - Kaiser window.
% triang - Triangular window.
%
% Transforms.
% czt - Chirp-z transform.
% dct - Discrete cosine transform.
% dftmtx - Discrete Fourier transform matrix.
% fft - Fast Fourier transform.
% fftshift - Swap vector halves.
% hilbert - Hilbert transform.
% idct - Inverse discrete cosine transform.
% ifft - Inverse fast Fourier transform.
%
% Statistical signal processing and spectral analysis.
% cohere - Coherence function estimate.
% corrcoef - Correlation coefficients.
% cov - Covariance matrix.
% csd - Cross Spectral Density.
% pcov - Power Spectrum estimate via Covariance method.
% peig - Power Spectrum estimate via the Eigenvector method.
% pmcov - Power Spectrum estimate via the Modified Covariance method.
% pburg - Power Spectrum estimate via Burg's method.
% pmtm - Power Spectrum estimate via the Thomson multitaper method.
% pmusic - Power Spectrum estimate via MUSIC method.
% pyulear - Power Spectrum estimate via the Yule-Walker AR Method.
% pwelch - Power Spectrum estimate via Welch's method.
% spectrum - psd, csd, cohere and tfe combined.
% tfe - Transfer function estimate.
% xcorr - Cross-correlation function.
% xcov - Covariance function.
%
% Parametric modeling.
% arburg - AR parametric modeling via Burg's method.
% arcov - AR parametric modeling via covariance method.
% armcov - AR parametric modeling via modified covariance method.
% aryule - AR parametric modeling via the Yule-Walker method.
% ident - See the System Identification Toolbox.
% invfreqs - Analog filter fit to frequency response.
% invfreqz - Discrete filter fit to frequency response.
% prony - Prony's discrete filter fit to time response.
% stmcb - Steiglitz-McBride iteration for ARMA modeling.
%
% Linear Prediction.
% ac2rc - Autocorrelation sequence to reflection coefficients conversion.
% ac2poly - Autocorrelation sequence to prediction polynomial conversion.
% is2rc - Inverse sine parameters to reflection coefficients conversion.
% lar2rc - Log area ratios to reflection coefficients conversion.
% levinson - Levinson-Durbin recursion.
% lpc - Linear Predictive Coefficients using autocorrelation method.
% lsf2poly - Line spectral frequencies to prediction polynomial conversion.
% poly2ac - Prediction polynomial to autocorrelation sequence conversion.
% poly2lsf - Prediction polynomial to line spectral frequencies conversion.
% poly2rc - Prediction polynomial to reflection coefficients conversion.
% rc2ac - Reflection coefficients to autocorrelation sequence conversion.
% rc2is - Reflection coefficients to inverse sine parameters conversion.
% rc2lar - Reflection coefficients to log area ratios conversion.
% rc2poly - Reflection coefficients to prediction polynomial conversion.
% rlevinson - Reverse Levinson-Durbin recursion.
%
% Waveform generation.
% chirp - Swept-frequency cosine generator.
% diric - Dirichlet (periodic sinc) function.
% gauspuls - Gaussian pulse generator.
% pulstran - Pulse train generator.
% rectpuls - Sampled aperiodic rectangle generator.
% sawtooth - Sawtooth function.
% sinc - Sinc or sin(pi*x)/(pi*x) function
% square - Square wave function.
% tripuls - Sampled aperiodic triangle generator.
%
% Audio support.
% auread - Read NeXT/SUN (".au") sound file.
% auwrite - Write NeXT/SUN (".au") sound file.
% sound - Play vector as sound.
% soundsc - Autoscale and play vector as sound.
% wavplay - Play sound using Windows audio output device.
% wavread - Read Microsoft WAVE (".wav") sound file.
% wavrecord - Record sound using Windows audio input device.
% wavwrite - Write Microsoft WAVE (".wav") sound file.
%
% Specialized operations.
% cceps - Complex cepstrum.
% decimate - Resample data at a lower sample rate.
% deconv - Deconvolution.
% demod - Demodulation for communications simulation.
% dpss - Discrete prolate spheroidal sequences (Slepian sequences).
% dpssclear - Remove discrete prolate spheroidal sequences from database.
% dpssdir - Discrete prolate spheroidal sequence database directory.
% dpssload - Load discrete prolate spheroidal sequences from database.
% dpsssave - Save discrete prolate spheroidal sequences in database.
% interp - Resample data at a higher sample rate.
% interp1 - General 1-D interpolation. (MATLAB Toolbox)
% medfilt1 - 1-Dimensional median filtering.
% modulate - Modulation for communications simulation.
% rceps - Real cepstrum and minimum phase reconstruction.
% resample - Resample sequence with new sampling rate.
% specgram - Spectrogram, for speech signals.
% spline - Cubic spline interpolation.
% vco - Voltage controlled oscillator.
%
% Other.
% besself - Bessel analog filter design.
% buffer - Buffer a signal vector into a matrix of data frames.
% conv2 - 2-D convolution.
% cplxpair - Order vector into complex conjugate pairs.
% fft2 - 2-D fast Fourier transform.
% ifft2 - Inverse 2-D fast Fourier transform.
% polystab - Polynomial stabilization.
% seqperiod - Find minimum-length repeating sequence in a vector.
% stem - Plot discrete data sequence.
% strips - Strip plot.
% xcorr2 - 2-D cross-correlation.
%
% See also SIGGUI, SIGDEMOS.
% Copyright (c) 1988-98 by The MathWorks, Inc.
% $Revision: 1.13 $ $Date: 1998/09/21 02:23:06 $