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Showing 1-25 of 35 resultsfor "Index Terms":wave digital filter (WDF)
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Efficient Implementation of LWDD using Unfolding Technique
2018 International Conference on Advances in Computing, Communication Control and Networking (ICACCCN)
Year: 2018 | Conference Paper |
This paper proposes work on an efficient implementation of third order differentiator which is based on the lattice wave digital filter (LWDF). For third order Lattice wave digital differentiator (LWDD), data flow graph (DFG) is represented and using an unfolding algorithm it is transformed into an efficient design. The simulation result validates that the proposed design takes less execution time...Show More
Design of a filter-bank by the wave digital filter technique an approach for the Chebishev bank-filter by the wave digital filter technique
2014 11th International Conference on Informatics in Control, Automation and Robotics (ICINCO)
Year: 2014 | Conference Paper |
This paper presents a simple procedure for design of the filter-bank with Wave digital filter (WDF). The filter-bank is constructed using Chebyshev and Inverse Chebyshev filters. Wave digital filters are derived from LC filters and consist of cascade connections of serial and parallel adapters. These adapters contains the necessary adders, multipliers and inverters. A great advantage of this...Show More
Memory Extraction From Dynamic Scattering Junctions in Wave Digital Structures
IEEE Signal Processing Letters
Cited by: Papers (5)
In this letter, we show that a computable tree-like interconnection of parallel/series wave digital (WD) adaptors with memory (i.e., characterized by reflection filters instead of reflection coefficients) is equivalent to a like interconnection of standard (memoryless) adaptors whose peripheral ports are connected to mutators (two-port adaptors with memory). In proving all this, we provide a metho...Show More
Wave digital filters (WDFs) are modeled after classical filters, preferably in lattice or ladder configurations or generalizations thereof. They have very good properties concerning coefficient accuracy requirements, dynamic range, and especially all aspects of stability under finite-arithmetic conditions. A detailed review of WDF theory is given. For this several goals are set: to offer an ...Show More
Mixed physical modeling: DWG + FDTD + WDF
2003 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (IEEE Cat. No.03TH8684)
Year: 2003 | Conference Paper |
Cited by: Papers (2)
Physical modeling by computer, especially for sound synthesis of musical instruments, is based on discrete time and space numerical simulation of the targeted physical systems. Digital waveguides (DWG) have been found to be a particularly attractive technique due to their efficiency and inherent capability of modeling systems with propagation delays. Other techniques used are, for example, finite ...Show More
FPGA Crystal Oscillator Circuit Emulation Based on Wave Digital Filter
The design cycle of analog and mixed signal (AMS) components requires the designer to iteratively perform analog simulations, layout, fabrication, and hardware testing. Unlike digital designs, system verification is a difficult task in analog designs, primarily due to a lack of emulation. Thus, a method to emulate AMS components on digital hardware would be highly beneficial. In this work, a high-...Show More
Modeling Sallen-Key audio filters in the Wave Digital domain
2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
Year: 2017 | Conference Paper |
Cited by: Papers (11)
Sallen-Key filters are widespread in audio circuits. Therefore, accurate and efficient digital models of such filters are highly desirable in audio Virtual Analog applications. In this paper, we will discuss a possible strategy, based on Wave Digital Filters (WDFs), for implementing all the analog filters described in the historical 1955 manuscript by Sallen and Key. In particular, we will group t...Show More
Wave digital filters for the migration of seismic data
Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing
Year: 1994 | Conference Paper |
Cited by: Papers (4)
A closed form design method for migration wave digital filters (MWDF) is presented. Migration filters are 2-D fan shaped filters with a prescribed nonlinear phase in the passband. An analytical solution is presented which solves simultaneously the approximation problems for attenuation and phase. The attenuation is approximated in a maximally flat sense in pass- and stopband. The phase of the idea...Show More
Efficient Realization of Wave Digital Components for Physical Modeling and Sound Synthesis
Wave digital filters (WDFs) were originally developed for robust discrete-time simulation of analog filters, but recently they have been applied successfully to modeling of physical systems such as musical instruments and to model-based sound synthesis. While basic WDF elements are sufficient to implement arbitrary passive lumped-element models, the computational efficiency of such models is...Show More
3D wave digital filter implementation on a virtex2 FPGA board with external SDRAM
2009 International Workshop on Multidimensional (nD) Systems
Year: 2009 | Conference Paper |
Cited by: Papers (7)
Many n-D signal processing applications require realization in real time. We propose the realization of a 3-D spatio-temporal wave digital filter (WDF) in an FPGA. Optimization of the implemented hardware architecture includes evaluation of two different kinds of overflow handling, namely by saturation and a ldquomodulo 2rdquo type operation. The FPGA board is processing DVI signals that can...Show More
Modeling Circuits With Arbitrary Topologies and Active Linear Multiports Using Wave Digital Filters
Kurt James Werner;Alberto Bernardini;Julius O. Smith;Augusto Sarti
The wave digital filter (WDF) technique derives digital filters from analog prototypes that classically have been restricted to passive circuits with series/parallel topologies. Since most audio circuits contain active elements (e.g., op-amps) and complex topologies, WDFs have only had limited use in virtual analog modeling. In this paper, we extend the WDF approach to accommodate the ...Show More
Multidimensional wave digital filtering approach for numerical integration of non-linear shallow water equations
2004 IEEE International Symposium on Circuits and Systems (ISCAS)
Year: 2004 | Conference Paper |
Cited by: Papers (1)
An alternative approach based on principles of multidimensional (MD) digital signal processing is presented for the solution of a nonlinear physical system. In essence, it consists in the modelling of a continuous (time-dependent) shallow water system by an equivalent discrete passive dynamical system, i.e. system described by difference equations instead of differential equations having the same ...Show More
Digital wave simulation of lossy lines for multi-gigabit applications
Frequency domain Vector Fitting (VF) is a well-known technique to generate circuital models of a spatially discretized lossy transmission lines from theoretical formulation of losses. The subpicosecond time steps required by multi-gigahertz bandwidths and short transmission lines included in the models, determine long Spice simulation times. A 100X speedup can be gained using the Digital Wave Simu...Show More
A Split-Modular Approach to Wave Digital Filters containing Bipolar Junction Transistors
2021 IEEE International Midwest Symposium on Circuits and Systems (MWSCAS)
Year: 2021 | Conference Paper |
Cited by: Papers (3)
We present a split-modular approach by means of separated forward and reverse conducting diodes described within the Ebers-Moll model for Bipolar Junction Transistors as a topological (parallel) junction in the wave digital domain. Thereby, non-computable loops that inevitably arise from multiple or multi-port nonlinearities are resolved simultaneously by means of Automatic Differentiating Wave Di...Show More
Wave digital filters: Voltage, current, or power waves?
ICASSP '85. IEEE International Conference on Acoustics, Speech, and Signal Processing
Year: 1985 | Conference Paper |
Cited by: Papers (10)
Wave digital filters (WDF's) may be derived from analog reference filters by voltage, current, or power waves. While current waves do not lead to structures essentially different from those derived by the common voltage waves, power wave structures have usually been disregarded due to their computational complexity. It is shown that, on the contrary, some of these structures may be implement...Show More
The wave digital filter (WDF) theory provides us with a systematic methodology for building digital models of analog filters through the discretization of their individual circuit components. In some situations, WDF principles can also be successfully used for modeling circuits in which a nonlinear circuit element is present under mild conditions on its characteristic. We propose an ex...Show More
On the analysis of sorting networks from the viewpoint of circuit theory
A sorting network is the kernel of an order statistics-based filter and contains all information about the nonlinearity. Its implementation is simple; its analysis, however, is relatively difficult due to the hiding of the nonlinearity. In this short paper, we analyze a sorting network from the viewpoint of classical circuit theory, and reveal its relation to a nonlinear lossless n-port. We show t...Show More
A general and explicit formulation for wave digital filters with multiple/multiport nonlinearities and complicated topologies
Kurt James Werner;Vaibhav Nangia;Julius O. Smith;Jonathan S. Abel
2015 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA)
Year: 2015 | Conference Paper |
Cited by: Papers (13)
A general, explicit, and novel formulation for Wave Digital Filters (WDFs) with multiple/multiport nonlinearities is presented. It confronts graph-theoretic views of WDF structures (SPQR tree) with techniques from the nonlinear loop resolution literature (the K method) and a novel method for deriving scattering matrices (WDF adaptors) of arbitrarily complex topologies. It accommodates ...Show More
Synthesis of bandpass circulator-tree wave digital filters
Lars Wanhammar;Baharak Soltanian;Oscar Gustafsson;Kenny Johansson
2008 15th IEEE International Conference on Electronics, Circuits and Systems
Year: 2008 | Conference Paper |
Cited by: Papers (1)
In this paper, we discuss the design of bandpass circulator-tree wave digital filters derived from analog lowpass filters using the geometrical symmetric transformation. These structures are an interesting alternative to lattice WDFs showing a high modularity and posses the same properties as other WDF structures.Show More
Modelling of high-order mechanical plate vibration systems by multidimensional wave digital filters
2005 IEEE International Symposium on Circuits and Systems (ISCAS)
Year: 2005 | Conference Paper |
The application of the MDWDF technique, derived from the wave digital filter (WDF) paradigm, to the modelling of a Mindlin plate vibration system is presented. Initial and boundary conditions of the plate vibration system are properly embedded in the MDWDF algorithm in terms of state output quantities, which are fully implemented in the algorithm. More specifically, different types of bounda...Show More
3D Velocity Filters for Improved Object Detection in Automotive Applications
2007 IEEE Intelligent Transportation Systems Conference
Year: 2007 | Conference Paper |
Cited by: Papers (2)
Vision-based object detection is a core part of many automotive collision warning systems. Especially due to the extensive information an image can hold and the decreasing costs of computational power, it has attracted more and more interest in the last decade. This paper proposes a motion-based approach to simplify the detection of moving objects. In contrast to most of the existing approaches we...Show More
Word Length Optimization of 2-D Wave Digital Filters with Weighted Quantization Error Variances
2018 IEEE International Symposium on Circuits and Systems (ISCAS)
Year: 2018 | Conference Paper |
Cited by: Papers (1)
Implementations of wave digital filters (WDF) require quantization of finite word lengths. We present a method for finite word length optimization of a 2-D-WDF, using magnitude truncation for quantization and weighted quantization error variances, constrained by a limited shared memory bus width. Moreover, we define a rule to obtain word lengths for various image sizes and arbitrary bu...Show More
An approach to the design of VLSI architectures for digital filters using bit level systolic arrays
IEE Colloquium on VLSI Signal Processing Architectures
Year: 1990 | Conference Paper |
Describes the design of hardware architectures of wave digital filters (WDF) using bit-level systolic arrays that are suitable for integration. It provides an account of the way in which the arrays are multiplexed and how they may be fully utilised. Unit element and lattice filters are described for a specific design example and VLSI implementation parameter estimates are given.<>Show More
Sorting network: its nonlinear wave digital filter network equivalent
1997 IEEE International Symposium on Circuits and Systems (ISCAS)
Year: 1997 | Conference Paper |
A sorting network is the kernel of an order statistics based filter that contains all informations about the nonlinearity. Its implementation is simple; its analysis, however, is relatively difficult due to the hidden nature of the nonlinearity. In this paper, we reveal that a sorting network is equivalent to a wave digital filter (WDF) network. In fact, a sorting network for n data is equiv...Show More
Digital Waveguides vs. Wave Digital Filters in physical modeling: Theoretical and computational aspects
2004 12th European Signal Processing Conference
Year: 2004 | Conference Paper |
Digital Waveguides (DWG) are known as a highly efficient approach to physical modeling and sound synthesis of musical instruments. Recently there has been increasing interest in studying other discrete-time paradigms such as Finite Difference Time Domain (FDTD) schemes as well as Wave Digital Filters (WDF) and their combinations for the same task domain. In this paper we investigate the rela...Show More
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