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GB2215544B - Apparatus for the correction of frequency independent errors in quadrature zero i.f. radio architectures - Google Patents

Apparatus for the correction of frequency independent errors in quadrature zero i.f. radio architectures

Info

Publication number
GB2215544B
GB2215544B GB8805748A GB8805748A GB2215544B GB 2215544 B GB2215544 B GB 2215544B GB 8805748 A GB8805748 A GB 8805748A GB 8805748 A GB8805748 A GB 8805748A GB 2215544 B GB2215544 B GB 2215544B
Authority
GB
United Kingdom
Prior art keywords
correction
frequency independent
radio architectures
independent errors
quadrature zero
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.)
Expired - Lifetime
Application number
GB8805748A
Other versions
GB8805748D0 (en
GB2215544A (en
Inventor
Andrew Philip Cheer
Alexander Brian Barber
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.)
GE Healthcare UK Ltd
Plessey Co Ltd
BAE Systems Defence Systems Ltd
Original Assignee
GE Healthcare UK Ltd
Plessey Co Ltd
Siemens Plessey Electronic Systems Ltd
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 GE Healthcare UK Ltd, Plessey Co Ltd, Siemens Plessey Electronic Systems Ltd filed Critical GE Healthcare UK Ltd
Priority to GB8805748A priority Critical patent/GB2215544B/en
Publication of GB8805748D0 publication Critical patent/GB8805748D0/en
Publication of GB2215544A publication Critical patent/GB2215544A/en
Application granted granted Critical
Publication of GB2215544B publication Critical patent/GB2215544B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/22—Homodyne or synchrodyne circuits
    • H03D1/2245—Homodyne or synchrodyne circuits using two quadrature channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB8805748A 1988-03-10 1988-03-10 Apparatus for the correction of frequency independent errors in quadrature zero i.f. radio architectures Expired - Lifetime GB2215544B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8805748A GB2215544B (en) 1988-03-10 1988-03-10 Apparatus for the correction of frequency independent errors in quadrature zero i.f. radio architectures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8805748A GB2215544B (en) 1988-03-10 1988-03-10 Apparatus for the correction of frequency independent errors in quadrature zero i.f. radio architectures

Publications (3)

Publication Number Publication Date
GB8805748D0 GB8805748D0 (en) 1988-04-07
GB2215544A GB2215544A (en) 1989-09-20
GB2215544B true GB2215544B (en) 1992-02-19

Family

ID=10633205

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8805748A Expired - Lifetime GB2215544B (en) 1988-03-10 1988-03-10 Apparatus for the correction of frequency independent errors in quadrature zero i.f. radio architectures

Country Status (1)

Country Link
GB (1) GB2215544B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2184833T3 (en) * 1995-02-21 2003-04-16 Tait Electronics Ltd NULL INTERMEDIATE FREQUENCY RECEIVER.
GB2310115B (en) * 1996-02-08 2000-06-07 Nokia Mobile Phones Ltd Method and apparatus for dc compensation
GB2311902B (en) * 1996-04-04 2000-05-10 Plessey Semiconductors Ltd An error correction circuit
WO1999056388A2 (en) * 1998-04-23 1999-11-04 Koninklijke Philips Electronics N.V. If-receiver
US6340903B1 (en) 2000-05-10 2002-01-22 Zilog, Ind. Auto-zero feedback sample-hold system
US20060007999A1 (en) * 2004-07-08 2006-01-12 Gomez Ramon A Method and system for enhancing image rejection in communications receivers using test tones and a baseband equalizer
EP2060081B1 (en) 2006-08-31 2011-10-19 ST-Ericsson SA Frequency dependent I/Q imbalance estimation

Also Published As

Publication number Publication date
GB8805748D0 (en) 1988-04-07
GB2215544A (en) 1989-09-20

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940310