SLIFER, A UNIQUELY INTERACTIVE
FIR FILTER DESIGN TOOL
DSP Creations Ltd. is pleased to announce the release of Version 3.7 of Slifer, a highly interactive MATLAB-based tool which makes FIR digital filter design easier than ever before. This package enables you to point and click your way to designs which meet those tough specifications which seem to elude the standard textbook approaches.
Slifer pulls you - and your intuition - into the design loop. Its single unified friendly graphic window allows you to easily shape your filter’s characteristics. No equations or calculations confront you - all design is done pictorially and intuitively. Smooth movements between time and frequency features allow nearly continuous refinement in both domains to deliver great performance while satisfying harsh coefficient budgets.
You can minimize errors at point frequencies or over bands that
reveal their pliability as you slide frequency response points up and down at
will, even moving these “gain guarantees” off the DFT grid points to arbitrary
spectral locations. Whether your concern is nulling out interfering tones or
sculpting curvaceous gain excursions, hand-crafting your filters has
never been this painless.
|
|
Slifer Features at a Glance
Real FIR filters
• Linear-phase, Minimum-phase and Maximum-phase
• Windowing, on top of Frequency-Sampling design
• Nonlinear-phase (including fractional-sample delay)
• Offset windowing for high quality filters incorporating fractional delay
• Export to MATLAB’s FDATool and SPTool
• 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
• Linear-phase, Minimum-phase and Maximum-phase
• Windowing, on top of Frequency-Sampling design
• Nonlinear-phase (including fractional-sample delay)
• Optional Analytic and Anti-analytic restrictions facilitate orthogonal negative-frequency and positive-frequency filtering effects
Any FIR filters
• Tight link to MATLAB and its complementary design capabilities
• 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
• Invoke MATLAB commands directly in Slifer to calculate, modify or compensate target profiles
• Import FIR filters obtained elsewhere and improve them
• Export designs to file system
• Export and embody designs in detailed Simulink blocks
• Window your filters (with standard and fractional-delay offset windows)
• 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
• Illustrate general signal operations’ effects on spectra
• Unsurpassed filter specification “pull-in” capability making use of a mix of hand-crafting options
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
• A Filter Design Resource Pack available to aid educators configuring classroom demos and design assignments
• Listen to audio-band filtering effects
• Excellent environment for DSP learners and seasoned practitioners alike
Price and Availability
Slifer is available for Windows 98/2000/XP/Vista/W7/Linux PC platforms now, at a cost of £400* per license. Simply email information@dspcreations.com, to arrange payment and delivery details.
Users must have any version of MATLAB dating
back as far as version 7.0.1 (Service
Pack 1) along with a corresponding version of the Signal Processing Toolbox (available
from the MathWorks Inc. at mathworks.com). 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.