A UNIQUELY INTERACTIVE FIR FILTER DESIGN TOOL

Slifer, operating in combination with DSP Creations' Sketch-A-Filt companion product, furnishes the ultimate intuitive pathway to rapid design of non-traditional, demanding FIR target filters.

Slifer Features at a Glance

Real FIR filters
• Linear-phase, Minimum-phase and Maximum-phase
• Windowing, on top of Frequency-Sampling design, to reduce gain ripples
• Nonlinear-phase (including fractional-sample delay)
• Offset windowing for high quality filters incorporating fractional delay
• Precise measurement of filter quality for quantified comparison of design tradeoffs

Complex FIR filters
• Provides a much-needed capability for modern baseband equivalent modelling and processing
• Set minimum-phase, maximum-phase and linear-phase conditions for complex-coefficient filters, at a button-press!
• Invoke non-symmetric windows for improved complex filters exhibiting fractional delay
• Choose either of the two popular variants of raised-cosine window definitions to reproduce conflicting coefficient sets advocated by different DSP practitioners
• Obtain arbitrary phase conditions for complex filters

Any FIR filters
• Large repertoire of "standard" target filters for launching designs
• Design to arbitrary target gain and phase profiles
• Unique pushbutton "profile calculator" allows rapid "drag-and-drop" construction of exotic filter target characteristics
• Least-Square and Equiripple design augment primary emphasis on Frequency Sampling
• Impose bandlimiting and/or modulation on any design
• Precision shaping of transition bands for improved error control
• Manipulate individual coefficients, zeros in the Pole/Zero Pattern, or frequency samples, seeing, feeling - and understanding - their complicated interplay
• Handy viewing of error and its components, group delay, phase delay, linear and dB gain, including 3-d complex plot views
• Pushbutton compensation of D/A hold and other degradations
• Quick transfer function-oriented creation of matched, inverse and Wiener filters
• Zoom into characteristics for closer visual inspection
• Quantize filter coefficients ON THE FLY, hand crafting while any one of 4 finite wordlength strategies is being imposed
• View and listen to effects of the designed filter on a selected .wav file
• Illustrate general signal operations' effects on spectra
• Unsurpassed filter specification "pull-in" capability making use of a mix of hand-crafting options

Links to Other Tools
• Export to MATLAB's FDATool and SPTool
• Tight link to MATLAB and its complementary design capabilities
• Import FIR filters obtained elsewhere and improve them
• Export designs to file system
• Export and embody designs in detailed Simulink blocks

Easy Startup
• Design your first Slifer-aided filter within seconds!
• Built-in Help file provides a detailed tour of user controls and their impact on designs
• An extensive in-tool Compendium of Design Examples, for guiding usage of Slifer features and benchmarking to results reported in DSP literature
• Listen to audio-band filtering effects
• Excellent environment for DSP learners and seasoned practitioners alike

System Requirements
• Any version of MATLAB® (version 7.5 [that is, Release R2007b] up though version 9.10 [that is, Release R2021a]), along with a corresponding version of the Signal Processing Toolbox™ (available from The MathWorks Inc.)
• Computing platforms: See roadmap of all corresponding MATLAB platforms.

Currently Slifer Is Not Available For Standalone Purchase

• All three of our software products are incorporated into the software package supporting the Training Courses described under "Services" on this website.
• To arrange an on-site course please contact Dr. Gerald D Cain, Email: cain@dspcreations.com