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Digital Filters: An Enabling Technology (Ref. No. 1998/252), IEE Colloquium on

Date 20 Apr 1998

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Displaying Results 1 - 14 of 14
  • Digital filtering for high performance real-time control

    Publication Year: 1998, Page(s):7/1 - 7/5
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (412 KB)

    Nowadays many control systems are implemented digitally, and the controllers which process the feedback signals and generate drive signals for the actuators are essentially IIR digital filters. The characteristics may either be defined as continuous time transfer functions and transformed into a discrete time representation for implementation, or they may be directly defined as discrete transfer f... View full abstract»

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  • A real time digital signal processing solution for radar pulse compression

    Publication Year: 1998, Page(s):6/1 - 6/5
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (428 KB)

    This paper outlines the design techniques that have been applied to the development of a flexible processor which is used to perform high speed, real time signal processing applicable to low cost, pulse compression radar. The core structure of this processor is similar to a standard nonrecursive filter, modified to suit the application. Flexibility in the design permits the use of multiple code ty... View full abstract»

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  • Recent advances in digital filters based on allpass sections

    Publication Year: 1998, Page(s):5/1 - 5/6
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (356 KB)

    Allpass sections have been shown to be useful building blocks for a variety of digital filters. They possess many desirable properties from the points of view of algorithmic design and implementation. In this paper we will concentrate on implementation and application to structures suitable for use in one-dimensional subband coding View full abstract»

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  • Digital filtering for 3D binaural sound

    Publication Year: 1998, Page(s):9/1 - 9/8
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (668 KB)

    The traditional binaural technique consists in recording sounds using miniature microphones placed at the entrance to the ear canals of a replica of the human head (dummy head microphone). The idea is that subsequent listening to these signals through headphones will reproduce the original auditory experience, evoking the sensation of a source located at a point in the space surrounding the listen... View full abstract»

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  • An application of linear periodically time-varying digital filters to blind equalisation

    Publication Year: 1998, Page(s):11/1 - 11/6
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (336 KB)

    Due to the increasing number of users, and the limited bandwidth available in most modem communication systems, blind equalisation has become an important research topic over the last few years. Most of the techniques that have already been proposed rely solely on signal processing performed at the receiver, forgetting the important role played by the transmitter. In this paper we present a novel ... View full abstract»

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  • Digital filtering and higher order statistics

    Publication Year: 1998, Page(s):4/1 - 4/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (356 KB)

    This paper addresses a new problem in higher order statistics (HOS), that of low pass filtering in the two dimensional cumulant domain which exploits third order statistical based algorithms operating on data where the assumption of additive Gaussian noise to a signal does not hold. The filters presented in this paper concentrate the filter energy into a desired region in the bispectral domain whi... View full abstract»

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  • One bit digital filtering

    Publication Year: 1998, Page(s):8/1 - 8/6
    Cited by:  Papers (4)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (436 KB)

    Many analogue-to-digital (A/D) and digital-to-analogue (D/A) converters use an intermediate sigma-delta modulating stage to convert signal inputs and outputs into a simple digital form for high quality conversion. In the case of A/D converters, a multibit representation of the signal is achieved with a decimating filter and, similarly, D/A converters employ interpolators to increase the sampling r... View full abstract»

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  • Digital filtering for audio coding

    Publication Year: 1998, Page(s):10/1 - 1011
    Cited by:  Papers (1)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (780 KB)

    In this paper we review the role of digital filters for audio coding. Most specifically we discuss the general subband/transform coding framework used in state of the art perception-based audio coders. Such strategies rely on the use of digital filter banks to decompose signals into time-frequency components to achieve better source coding gains by exploiting the signal redundancy and also facilit... View full abstract»

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  • On implementation and design of filter banks for subband adaptive systems

    Publication Year: 1998, Page(s):12/1 - 12/8
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (488 KB)

    This paper introduces a polyphase implementation and design of an oversampled K-channel generalized DFT (GDFT) filter bank, which can be employed for subband adaptive filtering, and therefore is required to have a low aliasing level in the subband signals. A polyphase structure is derived which can be factorized into a real valued polyphase network and a GDFT modulation. For the latter, an FFT rea... View full abstract»

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  • IIR stable, causal and perfect reconstruction uniform DFT filter banks with a real or complex prototype filter

    Publication Year: 1998, Page(s):13/1 - 13/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (356 KB)

    A new family of stable, causal and perfect reconstruction IIR maximally-decimated parallel uniform DFT filter banks (DFT FB) is presented. Two possible realisations exhibiting a simple and a massively parallel and modular processing structure suitable for a VLSI implementation are shown. In addition, some multipliers in the filters (both the analysis and synthesis) could be made a power or sum of ... View full abstract»

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  • IEE Colloquium on Digital Filters: An Enabling Technology

    Publication Year: 1998, Page(s): 0_5
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (44 KB)

    First Page of the Article
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  • The versatility of the allpass digital filter in 1-D and 2-D

    Publication Year: 1998, Page(s):1/1 - 1/8
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (452 KB)

    Digital filters have found their way into many products from everyday consumer items such as telephones to advanced maritime and military communications and avionics systems. Much filtering can now be carried out as one of many software routines implemented on a DSP chip although there are applications in which the speed offered by these devices is not sufficient. In the general area of real-time ... View full abstract»

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  • Using Matlab to analyse finite word length effects in infinite impulse response digital filters

    Publication Year: 1998, Page(s):2/1 - 2/8
    Cited by:  Papers (1)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (596 KB)

    Infinite impulse response (IIR) digital filters are particularly sensitive to problems associated with using a finite wordlength. The aspects most affected include the frequency and phase response, stability and signal to quantization noise ratio. This paper aims to present an overview of the design techniques that may be employed to analyse finite wordlength effects using Matlab. Of particular in... View full abstract»

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  • Digital filters: a practising engineer's perspective

    Publication Year: 1998, Page(s):3/1 - 3/6
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (288 KB)

    Contemporary sonar systems use the ultrasonic spectrum from DC to 500+ kHz; up to ~100 kHz all processing is typically implemented on general purpose DSPs. Narrow transition bands, low passband ripple, high stopband attenuation, etc., are common manifestations of the high `quality' requirements of the filters used in sonars. This paper states typical requirements for sonar filters, pres... View full abstract»

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