AU2001267222A1 - Improved method and apparatus for up- and down- conversion of radio frequency (rf) signals - Google Patents

Improved method and apparatus for up- and down- conversion of radio frequency (rf) signals

Info

Publication number
AU2001267222A1
AU2001267222A1 AU2001267222A AU6722201A AU2001267222A1 AU 2001267222 A1 AU2001267222 A1 AU 2001267222A1 AU 2001267222 A AU2001267222 A AU 2001267222A AU 6722201 A AU6722201 A AU 6722201A AU 2001267222 A1 AU2001267222 A1 AU 2001267222A1
Authority
AU
Australia
Prior art keywords
phi
signal
mixing
frequency
signals
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.)
Abandoned
Application number
AU2001267222A
Inventor
Tajinder Manku
Chris Snyder
Gareth Weale
Lawrence Wong
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.)
Icera Canada ULC
Original Assignee
Sirific Wireless ULC
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
Priority claimed from PCT/CA2000/000995 external-priority patent/WO2001017121A1/en
Application filed by Sirific Wireless ULC filed Critical Sirific Wireless ULC
Publication of AU2001267222A1 publication Critical patent/AU2001267222A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • 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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade
    • 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
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
    • H04B1/1036—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Superheterodyne Receivers (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

This patent describes a method and system which overcomes the LO-leakage problem during modulation and demodulation, common to direct conversion and similar RF transmitters and receivers. This problem is solved using a virtual local oscillator (VLO<TM>) signal which emulates mixing with a local oscillators (LO) signal. The VLO signal is constructed using complementary mixing signals that suppress mixing power in the bandwidth of the input signal, and within the bandwidth of the output frequency. Specifically, mixing is done in two or more stages, using time-varying mixing signals phi 1 and phi 2 which satisfy the following criteria: phi 1 * phi 2 having significant power at the frequency of the LO being emulated, one of phi 1 and phi 2 having minimal p ower around the frequency of the output signal <i>y(t)</i>, and the other of phi 1 and phi 2 having minimal power around the centre frequency, fRF, of the input signal <i>x(t)</i>.
AU2001267222A 2000-09-01 2001-06-19 Improved method and apparatus for up- and down- conversion of radio frequency (rf) signals Abandoned AU2001267222A1 (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
PCT/CA2000/000995 WO2001017121A1 (en) 1999-09-01 2000-09-01 Improved method and apparatus for up-conversion of radio frequency (rf) signals
AU69743/00 2000-09-01
PCT/CA2000/000996 WO2001017122A1 (en) 1999-09-01 2000-09-01 Improved method and apparatus for up- and down-conversion of radio frequency (rf) signals
AU69742/00 2000-09-01
PCT/CA2000/000994 WO2001017120A2 (en) 1999-09-01 2000-09-01 Freqency translator using a non-periodic local oscillator signal
AU69741/00 2000-09-01
PCT/CA2001/000876 WO2002019548A2 (en) 2000-09-01 2001-06-19 Improved method and apparatus for up- and down- conversion of radio frequency (rf) signals

Publications (1)

Publication Number Publication Date
AU2001267222A1 true AU2001267222A1 (en) 2002-03-13

Family

ID=27168651

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001267222A Abandoned AU2001267222A1 (en) 2000-09-01 2001-06-19 Improved method and apparatus for up- and down- conversion of radio frequency (rf) signals

Country Status (6)

Country Link
EP (1) EP1314255B1 (en)
AT (1) ATE446613T1 (en)
AU (1) AU2001267222A1 (en)
CA (1) CA2421173A1 (en)
DE (1) DE60140261D1 (en)
WO (1) WO2002019548A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2375291C (en) * 2002-03-08 2005-05-17 Sirific Wireless Corporation Generation of virtual local oscillator inputs for use in direct conversion radio systems

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2627586C3 (en) * 1976-06-19 1980-03-13 Carl Schenck Ag, 6100 Darmstadt Method and circuit arrangement for the multiplication of electrical alternating voltage signals
US5390346A (en) * 1994-01-21 1995-02-14 General Instrument Corporation Of Delaware Small frequency step up or down converters using large frequency step synthesizers
WO1996001006A1 (en) * 1994-06-29 1996-01-11 Honeywell Inc. Spurious response rejecting mixer using spread spectrum techniques
JP2737655B2 (en) * 1994-07-12 1998-04-08 双葉電子工業株式会社 Spread spectrum communication system
US5956345A (en) * 1996-09-13 1999-09-21 Lucent Technologies Inc. IS-95 compatible wideband communication scheme
JP3651154B2 (en) * 1996-12-27 2005-05-25 ソニー株式会社 PN code generation circuit and radio system terminal device
KR100264862B1 (en) * 1997-07-31 2000-09-01 윤종용 Orthogonal code hopping multiple access communication system
CN1211969C (en) * 1997-09-13 2005-07-20 三星电子株式会社 Device and method used for double othogonal code jump multi-address communication system
DE69821751T2 (en) * 1998-07-30 2004-11-25 Motorola Semiconducteurs S.A. Method and device for radio transmission

Also Published As

Publication number Publication date
DE60140261D1 (en) 2009-12-03
EP1314255B1 (en) 2009-10-21
ATE446613T1 (en) 2009-11-15
WO2002019548A3 (en) 2002-12-27
CA2421173A1 (en) 2002-03-07
EP1314255A2 (en) 2003-05-28
WO2002019548A2 (en) 2002-03-07

Similar Documents

Publication Publication Date Title
AU6974300A (en) Improved method and apparatus for up- and down-conversion of radio frequency (rf) signals
KR100306727B1 (en) Wide band zero if quadrature demodulator using a intermediate frequency and a single local oscillator
SE9703617D0 (en) Methods and apparatus for radio communication systems
DE60011234D1 (en) MULTI-BAND TRANSMITTER RECEIVER USING A DIRECTLY MIXED RECEIVER AND THE DIRECTLY MIXED RECEIVER TO DO THIS
NO996283L (en) Multimode Straight Receiver
CA2315489A1 (en) Radio communication apparatus and radio communication method
CA2194898A1 (en) Two Band Receiver
CA2379870A1 (en) Testing response of a radio transceiver
EP1039649A3 (en) Method and apparatus for multiband data communication , and storage medium
CA2104729A1 (en) Quadrature Modulation Circuit for Use in a Radio Transmitter
WO2002019546A3 (en) Method and apparatus for receive channel noise suppression
KR980007140A (en) Transmitter / receiver of time division full duplex spread spectrum communication system
AU2001267222A1 (en) Improved method and apparatus for up- and down- conversion of radio frequency (rf) signals
AU4233497A (en) Frequency conversion circuit and method for millimeter wave radio
JPS55161429A (en) Signal transmitting and receiving system
Berceli et al. A multiple-channel 12 GHz receiver for satellite television broadcasting
JPH0127301Y2 (en)
JPS5538725A (en) Transmitter/receiver
JPS5580948A (en) Fsk radio equipment
JPH11331019A (en) Radio equipment
Hislop Switching mixer
KR970000659B1 (en) Satellite communication central base site
JPS57192144A (en) Transmitter and receiver
Trask A new low-IMD mixer
JPS5767339A (en) Radio equipment