CA2061685A1 - Apparatus for and method of digital signal processing - Google Patents

Apparatus for and method of digital signal processing

Info

Publication number
CA2061685A1
CA2061685A1 CA002061685A CA2061685A CA2061685A1 CA 2061685 A1 CA2061685 A1 CA 2061685A1 CA 002061685 A CA002061685 A CA 002061685A CA 2061685 A CA2061685 A CA 2061685A CA 2061685 A1 CA2061685 A1 CA 2061685A1
Authority
CA
Canada
Prior art keywords
sub
multiplexer
channel
channels
bands
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002061685A
Other languages
French (fr)
Other versions
CA2061685C (en
Inventor
Alexander Walker Wishart
Francis Julian Lake
Paul Christopher Marston
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Matra Marconi Space UK Ltd
Original Assignee
Alexander Walker Wishart
Francis Julian Lake
Paul Christopher Marston
British Aerospace Public Limited Company
Matra Marconi Space Uk Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alexander Walker Wishart, Francis Julian Lake, Paul Christopher Marston, British Aerospace Public Limited Company, Matra Marconi Space Uk Limited filed Critical Alexander Walker Wishart
Publication of CA2061685A1 publication Critical patent/CA2061685A1/en
Application granted granted Critical
Publication of CA2061685C publication Critical patent/CA2061685C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18515—Transmission equipment in satellites or space-based relays
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0248—Filters characterised by a particular frequency response or filtering method
    • H03H17/0264—Filter sets with mutual related characteristics
    • H03H17/0266—Filter banks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/04—Frequency-transposition arrangements
    • H04J1/05—Frequency-transposition arrangements using digital techniques

Abstract

Apparatus for and a method of digital signal processing utilises a technique known as sub-band decomposition and reconstruction. A plurality of input channels are provided each of which is mixed with a vernier frequency correction. In a multiplexer implementation, an FFT weighted overlap-add demultiplexer (c) is provided for decomposing each input channel into sub-bands. The sub-band outputs are decimated by a factor (d) to the common input sampling rate of a multiplexer, the sub-bands from each channel then being passed into the appropriate ports of an FFT weighted overlap-add multiplexer (f) by means of a switch matrix (e). The multiplexer (f) reconstructs the individual channels, interpolates each channel up to the output sampling rate of the FDM signal, mixes each channel up to its assigned carrier frequency in the FDM and multiplexes the channels.

This provides a computationally efficient architecture with the flexibility to accommodate channels of differing bandwidths.
CA002061685A 1991-02-28 1992-02-21 Apparatus for and method of digital signal processing Expired - Fee Related CA2061685C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9104186.3 1991-02-28
GB919104186A GB9104186D0 (en) 1991-02-28 1991-02-28 Apparatus for and method of digital signal processing

Publications (2)

Publication Number Publication Date
CA2061685A1 true CA2061685A1 (en) 1992-08-29
CA2061685C CA2061685C (en) 2001-07-03

Family

ID=10690716

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002061685A Expired - Fee Related CA2061685C (en) 1991-02-28 1992-02-21 Apparatus for and method of digital signal processing

Country Status (7)

Country Link
US (1) US5293329A (en)
EP (1) EP0501690B1 (en)
JP (1) JP3090522B2 (en)
AT (1) ATE147558T1 (en)
CA (1) CA2061685C (en)
DE (1) DE69216442T2 (en)
GB (1) GB9104186D0 (en)

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GB2267783B (en) * 1992-06-09 1996-08-28 British Aerospace Beam forming
AU736120B2 (en) * 1993-10-29 2001-07-26 Treble Investments Limited Liability Company Transceiver apparatus employing wideband FFT channelizer and inverse FFT combiner for multichannel communication network
US5535240A (en) * 1993-10-29 1996-07-09 Airnet Communications Corporation Transceiver apparatus employing wideband FFT channelizer and inverse FFT combiner for multichannel communication network
US5606575A (en) * 1993-10-29 1997-02-25 Airnet Communications Corporation FFT-based channelizer and combiner employing residue-adder-implemented phase advance
US5537435A (en) * 1994-04-08 1996-07-16 Carney; Ronald Transceiver apparatus employing wideband FFT channelizer with output sample timing adjustment and inverse FFT combiner for multichannel communication network
US6334219B1 (en) 1994-09-26 2001-12-25 Adc Telecommunications Inc. Channel selection for a hybrid fiber coax network
US5585850A (en) * 1994-10-31 1996-12-17 Schwaller; John Adaptive distribution system for transmitting wideband video data over narrowband multichannel wireless communication system
US5579341A (en) * 1994-12-29 1996-11-26 Motorola, Inc. Multi-channel digital transceiver and method
US5748683A (en) * 1994-12-29 1998-05-05 Motorola, Inc. Multi-channel transceiver having an adaptive antenna array and method
CA2181807C (en) * 1994-12-29 1999-09-28 Robert C. Elder Wideband frequency signal digitizer and method
US5602874A (en) * 1994-12-29 1997-02-11 Motorola, Inc. Method and apparatus for reducing quantization noise
US5854813A (en) * 1994-12-29 1998-12-29 Motorola, Inc. Multiple access up converter/modulator and method
US5668836A (en) * 1994-12-29 1997-09-16 Motorola, Inc. Split frequency band signal digitizer and method
US5754597A (en) * 1994-12-29 1998-05-19 Motorola, Inc. Method and apparatus for routing a digitized RF signal to a plurality of paths
US7280564B1 (en) 1995-02-06 2007-10-09 Adc Telecommunications, Inc. Synchronization techniques in multipoint-to-point communication using orthgonal frequency division multiplexing
USRE42236E1 (en) 1995-02-06 2011-03-22 Adc Telecommunications, Inc. Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing
US5710763A (en) * 1995-07-31 1998-01-20 Motorola, Inc. Filtered fast Fourier transmultiplexer and method
US5754942A (en) * 1996-09-09 1998-05-19 Hughes Electronics Corporation Satellite power level monitoring system and method using digital signal processing
US5867479A (en) * 1997-06-27 1999-02-02 Lockheed Martin Corporation Digital multi-channel demultiplexer/multiplex (MCD/M architecture)
US6047162A (en) * 1997-09-25 2000-04-04 Com Dev Limited Regional programming in a direct broadcast satellite
US6091703A (en) * 1997-10-10 2000-07-18 Trw Inc. Bulk despreading of multiple independent CDMA sources
SE9802059D0 (en) * 1998-06-10 1998-06-10 Ericsson Telefon Ab L M Digital channeliser and De-shanneliser
AU755991B2 (en) * 1998-09-30 2003-01-02 Telefonaktiebolaget Lm Ericsson (Publ) Reduced complexity and increased flexibility modified fast convolution algorithm
US6247035B1 (en) 1998-09-30 2001-06-12 Telefonaktiebolaget Lm Ericsson (Publ) Reduced complexity and increased flexibility modified fast convolution algorithm
SE9903553D0 (en) 1999-01-27 1999-10-01 Lars Liljeryd Enhancing conceptual performance of SBR and related coding methods by adaptive noise addition (ANA) and noise substitution limiting (NSL)
US7914442B1 (en) 1999-03-01 2011-03-29 Gazdzinski Robert F Endoscopic smart probe and method
US8636648B2 (en) 1999-03-01 2014-01-28 West View Research, Llc Endoscopic smart probe
US10973397B2 (en) 1999-03-01 2021-04-13 West View Research, Llc Computerized information collection and processing apparatus
US8068897B1 (en) 1999-03-01 2011-11-29 Gazdzinski Robert F Endoscopic smart probe and method
US6611855B1 (en) 1999-06-21 2003-08-26 Telefonaktiebolaget Lm Ericsson (Publ) Flexible and efficient channelizer architecture
US6990060B2 (en) * 2000-02-11 2006-01-24 Bae Systems Polyphase-discrete fourier transform (DFT) sub-band definition filtering architecture
SE0001926D0 (en) 2000-05-23 2000-05-23 Lars Liljeryd Improved spectral translation / folding in the subband domain
FR2817100B1 (en) * 2000-11-17 2003-08-22 Cit Alcatel METHOD FOR OPTIMIZING THE PERFORMANCE OF A TRANSMITTER FOR A MOBILE RADIO COMMUNICATION SYSTEM
SE0202159D0 (en) 2001-07-10 2002-07-09 Coding Technologies Sweden Ab Efficientand scalable parametric stereo coding for low bitrate applications
US8605911B2 (en) 2001-07-10 2013-12-10 Dolby International Ab Efficient and scalable parametric stereo coding for low bitrate audio coding applications
JP3870193B2 (en) 2001-11-29 2007-01-17 コーディング テクノロジーズ アクチボラゲット Encoder, decoder, method and computer program used for high frequency reconstruction
SE0202770D0 (en) 2002-09-18 2002-09-18 Coding Technologies Sweden Ab Method of reduction of aliasing is introduced by spectral envelope adjustment in real-valued filterbanks
WO2004073229A2 (en) * 2003-01-28 2004-08-26 The Boeing Company Systems and methods for digital processing of satellite communications data

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DE3118473A1 (en) * 1981-05-09 1982-11-25 TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg METHOD FOR PROCESSING ELECTRICAL SIGNALS WITH A DIGITAL FILTER ARRANGEMENT
US4691292A (en) * 1983-04-13 1987-09-01 Rca Corporation System for digital multiband filtering
DE3584901D1 (en) * 1984-03-16 1992-01-30 Siemens Ag DIGITAL FILTER ARRANGEMENT FOR SPLIT SIGNALS IN SUBBAND.
DE3610195A1 (en) * 1986-03-26 1987-10-01 Ant Nachrichtentech DIGITAL FILTER BANK
DE8706928U1 (en) * 1987-05-14 1987-08-06 Ant Nachrichtentechnik Gmbh, 7150 Backnang, De
US4829378A (en) * 1988-06-09 1989-05-09 Bell Communications Research, Inc. Sub-band coding of images with low computational complexity
US4918524A (en) * 1989-03-14 1990-04-17 Bell Communications Research, Inc. HDTV Sub-band coding using IIR filter bank
GB2241853A (en) * 1990-03-08 1991-09-11 British Aerospace Digital signal processing apparatus comprising architectures for digital multiplexing and demultiplexing.

Also Published As

Publication number Publication date
ATE147558T1 (en) 1997-01-15
JP3090522B2 (en) 2000-09-25
US5293329A (en) 1994-03-08
DE69216442T2 (en) 1997-04-24
CA2061685C (en) 2001-07-03
JPH05199196A (en) 1993-08-06
EP0501690A2 (en) 1992-09-02
GB9104186D0 (en) 1991-04-17
EP0501690A3 (en) 1993-07-21
EP0501690B1 (en) 1997-01-08
DE69216442D1 (en) 1997-02-20

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