DADiSP Software
Module - DADiSP/Advanced DSP
 DADiSP/AdvDSP
is a menu-driven module for DADiSP
that offers a wide variety of DSP algorithms, including advanced FFT analysis,
power spectral density estimation, digital interpolation and cepstrum
analysis.
AdvDSP is easy-to-use and allows you to perform sophisticated signal
processing without any programming. Each routine is available through
a simple dialog box interface or as a direct command line function. Extensive
on-line help and examples are also provided.
Key Features
- Simple User Interface
- Classical PSD Estimation
- Parametric AR, MA and ARMA PSD Estimation
- Parametric Linear Prediction
- Zoom FFT and Chirp Z Transforms
- Sinx/x and Zero Insertion Digital Interpolation
- Transfer Function, Cross Power and Coherence Estimate
- Real and Complex Cepstrum Analysis
Advanced DSP Module
DADiSP/AdvDSP is a menu-driven, advanced signal processing module
that adds classical and parametric PSD estimation, linear prediction,
Zoom FFT, Chirp Z transform, digital interpolation and cepstrum routines.
Each routine is available through an easy to use dialog box interface
or simple command line functions. On-line help and examples are also provided.
Classical PSD Estimation
Classical Power Spectrum Estimation techniques include the standard FFT
based PSD, the correlation method and the overlapped Welch method of periodogram
averaging. Both the segment length and overlap size can be specified.
In addition, coherence, cross-power and transfer function estimates are
supported.
Parametric PSD Estimation
Parametric estimation techniques include AR - Autoregressive all pole
models, MA - Moving Average all zero models, and ARMA, generalized pole
and zero models. The model coefficients are computed from measured data
and the coefficients can be used to estimate the PSD as well as provide
time domain linear prediction results.
Digital Interpolation
The effective sample rate of any waveform can be changed using a variety
of robust digital interpolation algorithms. Traditional Sinx/x bandlimited
interpolation as well as non-integer multiple zero insertion routines
are provided. Classical linear and cubic spline interpolation functions
are also included.
Advanced FFT Analysis
AdvDSP can compute a true N point FFT. If the series length is less than
the specified FFT size, the series is automatically zero padded. If the
FFT size is less than the series length, rather than truncation, the series
is time aliased resulting in a properly decimated FFT. The Zoom FFT computes
the FFT for a selected frequency range and the Chirp Z transform computes
the FFT about a generalized Z plane contour.
Cepstrum Analysis
Both real and complex cepstrum computation is available. Cepstrum analysis
simplifies the task of echo identification and cancellation for speech
and audio applications.
See function list...
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