DADiSP / AdvDSP
Advanced DSP Module
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 dialogue box interface or as a direct command line function. Extensive on-line help and examples are also provided.
- 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.
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.
Both real and complex cepstrum computation is available. Cepstrum analysis simplifies the task of echo identification and cancellation for speech and audio applications.
DADiSP/AdvDSP requires DADiSP 6.0 B14 or higher.
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