FR2246126A2 - Equalizer for quadrature carrier data transmission systems - appropiate derivation of correcting signals for errors between channels - Google Patents

Equalizer for quadrature carrier data transmission systems - appropiate derivation of correcting signals for errors between channels

Info

Publication number
FR2246126A2
FR2246126A2 FR7334829A FR7334829A FR2246126A2 FR 2246126 A2 FR2246126 A2 FR 2246126A2 FR 7334829 A FR7334829 A FR 7334829A FR 7334829 A FR7334829 A FR 7334829A FR 2246126 A2 FR2246126 A2 FR 2246126A2
Authority
FR
France
Prior art keywords
equalizer
appropiate
derivation
errors
channels
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
FR7334829A
Other languages
French (fr)
Other versions
FR2246126B2 (en
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.)
Telecommunications Radioelectriques et Telephoniques SA TRT
Original Assignee
Telecommunications Radioelectriques et Telephoniques SA TRT
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 FR7308476A external-priority patent/FR2318542A1/en
Application filed by Telecommunications Radioelectriques et Telephoniques SA TRT filed Critical Telecommunications Radioelectriques et Telephoniques SA TRT
Priority to FR7334829A priority Critical patent/FR2246126A2/en
Publication of FR2246126A2 publication Critical patent/FR2246126A2/en
Application granted granted Critical
Publication of FR2246126B2 publication Critical patent/FR2246126B2/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/01—Equalisers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

The apparatus is as in 73.08476 and the equalizer, using filters, adders, decision circuits, not only corrects for amplitude and delays inter-symbol distortions but also corrects the transmission for cross-distortions between signals on two carriers with 90 deg. phase difference. The additions to the apparatus as in 73.08476 provide for adjustment of the phase at which samples are taken to feed error correction signals to equalizers (61) and (67). The outputs of two filters for the two carrier waves in quadrature are passed to the adder connected to a logic circuit which is used to maintain the correct phase relationship. The phase is determined by a special sampling process.
FR7334829A 1973-03-09 1973-09-28 Equalizer for quadrature carrier data transmission systems - appropiate derivation of correcting signals for errors between channels Granted FR2246126A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7334829A FR2246126A2 (en) 1973-03-09 1973-09-28 Equalizer for quadrature carrier data transmission systems - appropiate derivation of correcting signals for errors between channels

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7308476A FR2318542A1 (en) 1973-03-09 1973-03-09 SELF-ADAPTIVE EQUALIZER OF A TRANSMISSION CHANNEL
FR7334829A FR2246126A2 (en) 1973-03-09 1973-09-28 Equalizer for quadrature carrier data transmission systems - appropiate derivation of correcting signals for errors between channels

Publications (2)

Publication Number Publication Date
FR2246126A2 true FR2246126A2 (en) 1975-04-25
FR2246126B2 FR2246126B2 (en) 1980-04-18

Family

ID=26217610

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7334829A Granted FR2246126A2 (en) 1973-03-09 1973-09-28 Equalizer for quadrature carrier data transmission systems - appropiate derivation of correcting signals for errors between channels

Country Status (1)

Country Link
FR (1) FR2246126A2 (en)

Also Published As

Publication number Publication date
FR2246126B2 (en) 1980-04-18

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