Signal

Signal — Signal manual description

Filters

`analpf`	: analog low-pass filter
`buttmag`	: squared magnitude response of a Butterworth filter
`casc`	: creates cascade realization of filter
`cheb1mag`	: square magnitude response of a type 1 Chebyshev filter
`cheb2mag`	: square magnitude response of a type 1 Chebyshev filter
`chepol`	: recursive implementation of Chebychev polynomial
`convol`	: convolution of 2 discrete series
`ell1 mag`	: squared magnitude of an elliptic filter
`eqfir`	: minimax multi-band, linear phase, FIR filter
`eqiir`	: design of iir filter
`faurre`	: optimal lqg filter.
`lindquis`	: optimal lqg filter lindquist algorithm
`ffilt`	: FIR low-pass,high-pass, band-pass, or stop-band filter
`filter`	: compute the filter model
`find_freq`	: parameter compatibility for elliptic filter design
`findm`	: for elliptic filter design
`frmag`	: magnitude of the frequency responses of FIR and IIR filters.
`fsfirlin`	: design of FIR, linear phase (frequency sampling technique)
`fwiir`	: optimum design of IIR filters in cascade realization,
`iir`	: designs an iir digital filter using analog filter designs.
`iirgroup`	: group delay of iir filter
`iirlp`	: Lp IIR filters optimization
`group`	: calculate the group delay of a digital filter
`optfir`	: optimal design of linear phase filters using linear programming
`remezb`	: minimax approximation of a frequency domain magnitude response.
`kalm`	: Kalman update and error variance
`lev`	: resolve the Yule-Walker equations :
`levin`	: solve recursively Toeplitz system (normal equations)
`srfaur`	: square-root algorithm for the algebraic Riccati equation.
`srkf`	: square-root Kalman filter algorithm
`sskf`	: steady-state Kalman filter
`system`	: generates the next observation given the old state
`trans`	: transformation of standardized low-pass filter into low-pass, high-pass, band-pass, stop-band.
`wfir`	: linear-phase windowed FIR low-pass, band-pass, high-pass, stop-band
`wiener`	: Wiener estimate (forward-backward Kalman filter formulation)
`wigner`	: time-frequency wigner spectrum of a signal.
`window`	: calculate symmetric window
`zpbutt`	: Butterworth analog filter
`zpch1`	: poles of a type 1 Chebyshev analog filter
`zpch2`	: poles and zeros of a type 2 Chebyshev analog filter
`zpell`	: poles and zeros of prototype lowpass elliptic filter

Spectral estimation

`corr`	: correlation coefficients
`cspect`	: spectral estimation using the modified periodogram method.
`czt`	: chirp z-transform algorithm
`intdec`	: change the sampling rate of a 1D or 2D signal
`mese`	: calculate the maximum entropy spectral estimate
`pspect`	: auto and cross-spectral estimate
`wigner`	: Wigner-Ville time/frequency spectral estimation

Transforms

`dft`	: discrete Fourier transform
`fft`	: fast flourier transform
`hilb`	: Hilbert transform centred around the origin.
`hank`	: hankel matrix of the covariance sequence of a vector process
`mfft`	: fft for a multi-dimensional signal

Identification

`lattn,lattp`	: recursive solution of normal equations
`phc`	: State space realisation by the principal hankel component approximation method,
`rpem`	: identification by the recursive prediction error method

Miscellaneous

`lgfft`	: computes p = ceil (log_2(x))
`sinc`	: calculate the function sin(2piflt)/(pit)
`sincd`	: calculates the function Sin(N*x)/Sin(x)
`%k`	: Jacobi's complete elliptic integral
`%asn`	: .TP the elliptic integral :
`%sn`	: Jacobi 's elliptic function with parameter m
`bilt`	: bilinear transform or biquadratic transform.
`jmat`	: permutes block rows or block columns of a matrix