WO1997031466A3 - Fsk receiver - Google Patents

Fsk receiver Download PDF

Info

Publication number
WO1997031466A3
WO1997031466A3 PCT/GB1997/000479 GB9700479W WO9731466A3 WO 1997031466 A3 WO1997031466 A3 WO 1997031466A3 GB 9700479 W GB9700479 W GB 9700479W WO 9731466 A3 WO9731466 A3 WO 9731466A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
receiver
analogue
electrical signal
digitised
Prior art date
Application number
PCT/GB1997/000479
Other languages
French (fr)
Other versions
WO1997031466A2 (en
Inventor
Robert Edmund Todd
Original Assignee
Cedardell Ltd
Robert Edmund Todd
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 Cedardell Ltd, Robert Edmund Todd filed Critical Cedardell Ltd
Priority to US09/125,670 priority Critical patent/US6437693B1/en
Priority to AT97903520T priority patent/ATE313902T1/en
Priority to DE69734919T priority patent/DE69734919T2/en
Priority to AU18060/97A priority patent/AU1806097A/en
Priority to EP97903520A priority patent/EP0882345B1/en
Publication of WO1997031466A2 publication Critical patent/WO1997031466A2/en
Publication of WO1997031466A3 publication Critical patent/WO1997031466A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/14—Demodulator circuits; Receiver circuits
    • H04L27/144—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements
    • H04L27/152—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements using controlled oscillators, e.g. PLL arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Noise Elimination (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Looms (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

A signal processing apparatus (1) comprises an analogue RF receiver (2) which has a local oscillator (7). The analogue receiver (2) receives in use a first electrical signal from antenna (4) at a carrier frequency, which signal is modulated by a digitised modulating signal to provide a second electrical signal having an amplitude representing an instantaneous logic level of the digitised modulating signal. The apparatus further comprises a digital processor (13) for processing the second electrical signal and providing an output signal in response thereto. The digital processor is controlled in use by clock signals provided in response to actuation of a local oscillator of the analogue receiver.
PCT/GB1997/000479 1996-02-21 1997-02-20 Fsk receiver WO1997031466A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US09/125,670 US6437693B1 (en) 1996-02-21 1997-02-20 FSK receiver
AT97903520T ATE313902T1 (en) 1996-02-21 1997-02-20 FSK RECEIVER
DE69734919T DE69734919T2 (en) 1996-02-21 1997-02-20 FSK RECEIVER
AU18060/97A AU1806097A (en) 1996-02-21 1997-02-20 Fsk receiver
EP97903520A EP0882345B1 (en) 1996-02-21 1997-02-20 Fsk receiver

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9603609.0 1996-02-21
GBGB9603609.0A GB9603609D0 (en) 1996-02-21 1996-02-21 Apparatus for processing radiated radio frequency signals

Publications (2)

Publication Number Publication Date
WO1997031466A2 WO1997031466A2 (en) 1997-08-28
WO1997031466A3 true WO1997031466A3 (en) 1997-10-23

Family

ID=10789114

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/000479 WO1997031466A2 (en) 1996-02-21 1997-02-20 Fsk receiver

Country Status (8)

Country Link
US (1) US6437693B1 (en)
EP (1) EP0882345B1 (en)
AT (1) ATE313902T1 (en)
AU (1) AU1806097A (en)
DE (1) DE69734919T2 (en)
ES (1) ES2256875T3 (en)
GB (1) GB9603609D0 (en)
WO (1) WO1997031466A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7634028B2 (en) * 2004-05-27 2009-12-15 Silicon Laboratories Inc. Selecting clock frequencies for baseband devices
AU2013395156B2 (en) * 2013-07-26 2020-02-27 Alstom Transport Technologies Track circuit mechanical joint integrity checker

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0442578A1 (en) * 1990-02-15 1991-08-21 Philips Patentverwaltung GmbH Television receiving section
EP0527469A2 (en) * 1991-08-12 1993-02-17 Matsushita Electric Industrial Co., Ltd. FSK data receiving system
GB2290202A (en) * 1994-06-06 1995-12-13 Oki Electric Ind Co Ltd Frequency-shift-keying detector using digital circuits
EP0755113A2 (en) * 1995-06-22 1997-01-22 University Of Bristol Radio receiver and frequency generator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4893316A (en) * 1985-04-04 1990-01-09 Motorola, Inc. Digital radio frequency receiver
JPH0797779B2 (en) * 1989-08-25 1995-10-18 松下電器産業株式会社 90 degree phase shifter and data receiver
JP3241098B2 (en) * 1992-06-12 2001-12-25 株式会社東芝 Multi-system receiver
US5345187A (en) * 1992-09-11 1994-09-06 Mcguire Ronald F Dual frequency demodulation apparatus for frequency shift keyed (FSK) data signals and FM signals and method therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0442578A1 (en) * 1990-02-15 1991-08-21 Philips Patentverwaltung GmbH Television receiving section
EP0527469A2 (en) * 1991-08-12 1993-02-17 Matsushita Electric Industrial Co., Ltd. FSK data receiving system
GB2290202A (en) * 1994-06-06 1995-12-13 Oki Electric Ind Co Ltd Frequency-shift-keying detector using digital circuits
EP0755113A2 (en) * 1995-06-22 1997-01-22 University Of Bristol Radio receiver and frequency generator

Also Published As

Publication number Publication date
US6437693B1 (en) 2002-08-20
DE69734919D1 (en) 2006-01-26
EP0882345B1 (en) 2005-12-21
GB9603609D0 (en) 1996-04-17
EP0882345A2 (en) 1998-12-09
WO1997031466A2 (en) 1997-08-28
ES2256875T3 (en) 2006-07-16
DE69734919T2 (en) 2006-08-17
AU1806097A (en) 1997-09-10
ATE313902T1 (en) 2006-01-15

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