Dew.Signal 6.3.8

Dew.Signal

High-performance Digital Signal Processing (DSP) Library for .NET

Dew.Signal is a high-performance DSP library built on top of Dew.Math, providing a comprehensive suite of optimized algorithms for real-time signal analysis, filtering, spectral estimation, modeling, measurement, synthesis, and streaming workflows. The library targets scientific, engineering, audio, RF, vibration, instrumentation, monitoring, and control applications requiring both numerical accuracy and hardware-level performance on multi-core CPUs with AVX2/AVX512 acceleration.

Key Features

Filter Design and Processing

• IIR filter design: Butterworth, Chebyshev I/II, Elliptic, Bessel (analog and digital)
• Filter order estimation and frequency domain transformations (low/high/bandpass/bandstop)
• Bilinear transform, Matched-Z transform, group delay computation
• State-space, zero-pole-numerator, and transfer function modeling
• FIR filter design using window methods and Remez exchange algorithm
• Hilbert transformers, differentiators, integrators, Savitzky-Golay smoothing, envelope detectors
• Multi-rate filtering: half-band polyphase filters, decimation, interpolation, zoom-spectrum analysis

Nonlinear and Adaptive Filters

• Sample-and-hold, sample-and-decay, and median filtering
• High-quality rate conversion with linear-phase filtering and approximately 160 dB stopband attenuation

Spectral and Frequency-Domain Analysis

• FFT and CZT-based spectral analysis with real-time streaming support
• Parametric spectral estimation: Yule-Walker, Burg, Covariance, Modified-Covariance
• Bispectrum, bicoherence, transfer function, and coherence estimation
• Peak interpolation and peak tracking, phase unwrapping
• Real and complex cepstrum, inverse cepstrum
• Spectral statistics: noise floor, SFDR, THD, THDN, SINAD, RMS, SNR

Signal Synthesis, Streaming, and Measurement

• Vectorized signal generators with stack-based function evaluation
• Audio capture/playback with real-time monitoring and trigger support
• Streaming components for continuous acquisition, playback, and logging

Time-Series Modeling and Forecasting

• Spectral forecasting using controlled peak selection to produce smooth, interpretable predictions

Integration and Extensions

• Fully interoperable with Dew.Math vector/matrix types
• Optional visualization via a separate package:
  • For real-time charts and spectrum plots on Windows: Dew.Signal.Tee

IMPORTANT (for Windows Forms Designer Users)

Microsoft removed binary serialization support starting with .NET 8. Dew.Signal has been updated accordingly. RESX is no longer used for Dew.Signal component persistence.

If you are upgrading an existing WinForms application:

1. Remove any existing Dew.Signal-related resources and references (if present).
2. Dew.Signal related properties being loaded from "resource" need to be deleted from the Form's Initialization routine.

Typical failure symptoms when legacy resource references remain:

• "The name 'resources' does not exist in the current context"
• Designer load exceptions referencing resource lookups

Benefits of the new model:

• resx files no longer encode Dew.Math/Dew.Signal type metadata, allowing smooth upgrades
• The same approach is used across .NET Framework, .NET 8, and .NET 9
• API surface is consistent across all target frameworks (net48, net8.0-windows, net9.0-windows)

Note: TeeChart-related serialization remains different due to Steema's internal design model.

Examples

• WinForms / WPF / ASP.NET (.NET Framework): https://github.com/Dew-Research/DewLabStudio-NETFramework-Samples

• WinForms (.NET Core / .NET 6-9): https://github.com/Dew-Research/DewLabStudio-NETCore-Samples

• Organization Home: https://github.com/Dew-Research

Documentation

• API Reference: https://www.dewresearch.com/Help/VSNET/DSPMaster/contents.html
• User Guide (PDF): http://downloads.dewresearch.com/downloads/SignalV6-CSharp.pdf
• Product Page: https://www.dewresearch.com/products/dsp-master/dsp-master-for-visual-studio-net
• NuGet Publisher Profile: https://www.nuget.org/profiles/DewResearch/
• License: https://www.dewresearch.com/downloads/LicenseNET.pdf

License

Commercial license. See DewDSPLicense.txt included in this package. All Dew.* NuGet packages on nuget.org are trial versions and work from inside Visual Studio IDE only.