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WO2007034420A3 - Zero or low if receiver - Google Patents

Zero or low if receiver Download PDF

Info

Publication number
WO2007034420A3
WO2007034420A3 PCT/IB2006/053389 IB2006053389W WO2007034420A3 WO 2007034420 A3 WO2007034420 A3 WO 2007034420A3 IB 2006053389 W IB2006053389 W IB 2006053389W WO 2007034420 A3 WO2007034420 A3 WO 2007034420A3
Authority
WO
WIPO (PCT)
Prior art keywords
channel
output
signal
demodulated signal
demodulator
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.)
Ceased
Application number
PCT/IB2006/053389
Other languages
French (fr)
Other versions
WO2007034420A2 (en
Inventor
Alan J Davie
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of WO2007034420A2 publication Critical patent/WO2007034420A2/en
Publication of WO2007034420A3 publication Critical patent/WO2007034420A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/30—Circuits for homodyne or synchrodyne receivers
    • 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
    • H04L27/1525—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 using quadrature demodulation
    • 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
    • H04L27/156—Demodulator circuits; Receiver circuits with demodulation using temporal properties of the received signal, e.g. detecting pulse width
    • H04L27/1563—Demodulator circuits; Receiver circuits with demodulation using temporal properties of the received signal, e.g. detecting pulse width using transition or level detection

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Communication Control (AREA)

Abstract

A Zero IF receiver (1) has a demodulator (15) that can either demodulate both an I signal component output by an I channel (12) and a Q signal component output by a Q channel (13) to output a dual channel demodulated signal or demodulate just the I signal component output by the I channel (12) to output a single channel demodulated signal. A controller (16) causes output of the dual channel demodulated signal or the single channel demodulated signal by selectively disabling the Q channel. When the dual channel demodulated signal is output by the demodulator (15), the values of bits in the signal can be determined in a conventional way. When the single channel signal is output by the demodulator (15), only transitions between bits of different value can be identified. However, these transitions can be used by a decoder (17) in combination with a value of a bit previously determined from the dual channel demodulated signal to continue to output bit values. So, the signal can be demodulated and decoded even when the controller (16) disables the Q channel (13) for much of the time.
PCT/IB2006/053389 2005-09-21 2006-09-20 Zero or low if receiver Ceased WO2007034420A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05108721.1 2005-09-21
EP05108721 2005-09-21

Publications (2)

Publication Number Publication Date
WO2007034420A2 WO2007034420A2 (en) 2007-03-29
WO2007034420A3 true WO2007034420A3 (en) 2007-07-19

Family

ID=37882117

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/053389 Ceased WO2007034420A2 (en) 2005-09-21 2006-09-20 Zero or low if receiver

Country Status (1)

Country Link
WO (1) WO2007034420A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9020073B2 (en) 2007-10-23 2015-04-28 Intel Mobile Communications GmbH Low intermediate frequency receiver

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5293408A (en) * 1991-10-14 1994-03-08 Matsushita Electric Industrial Co., Ltd. FSK data receiving system
JPH08139770A (en) * 1994-11-10 1996-05-31 Matsushita Electric Ind Co Ltd Direct conversion receiver
US5633895A (en) * 1995-08-03 1997-05-27 Motorola, Inc. Communication device with synchronized zero-crossing demodulator and method
US5724001A (en) * 1996-12-02 1998-03-03 Motorola, Inc. Method and apparatus for demodulating a frequency shift keyed signal
US6038268A (en) * 1996-02-15 2000-03-14 General Research Of Electronics, Inc. Direct conversion FSK signal radio receiver
US20020058491A1 (en) * 2000-11-10 2002-05-16 Koninklijke Philips Electronics N.V. Radio receiver
US6570938B1 (en) * 1996-05-01 2003-05-27 Motorola, Inc. Method and apparatus for recovering data symbols from a signal received by a radio communication device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5293408A (en) * 1991-10-14 1994-03-08 Matsushita Electric Industrial Co., Ltd. FSK data receiving system
JPH08139770A (en) * 1994-11-10 1996-05-31 Matsushita Electric Ind Co Ltd Direct conversion receiver
US5633895A (en) * 1995-08-03 1997-05-27 Motorola, Inc. Communication device with synchronized zero-crossing demodulator and method
US6038268A (en) * 1996-02-15 2000-03-14 General Research Of Electronics, Inc. Direct conversion FSK signal radio receiver
US6570938B1 (en) * 1996-05-01 2003-05-27 Motorola, Inc. Method and apparatus for recovering data symbols from a signal received by a radio communication device
US5724001A (en) * 1996-12-02 1998-03-03 Motorola, Inc. Method and apparatus for demodulating a frequency shift keyed signal
US20020058491A1 (en) * 2000-11-10 2002-05-16 Koninklijke Philips Electronics N.V. Radio receiver

Also Published As

Publication number Publication date
WO2007034420A2 (en) 2007-03-29

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