GB2319148B - Noise level determination - Google Patents

Noise level determination

Info

Publication number
GB2319148B
GB2319148B GB9620188A GB9620188A GB2319148B GB 2319148 B GB2319148 B GB 2319148B GB 9620188 A GB9620188 A GB 9620188A GB 9620188 A GB9620188 A GB 9620188A GB 2319148 B GB2319148 B GB 2319148B
Authority
GB
United Kingdom
Prior art keywords
noise level
level determination
determination
noise
level
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 - Fee Related
Application number
GB9620188A
Other versions
GB2319148A (en
GB9620188D0 (en
Inventor
John Douglas Fortier
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.)
GPT Ltd
Plessey Telecommunications Ltd
Original Assignee
GPT Ltd
Plessey Telecommunications 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 GPT Ltd, Plessey Telecommunications Ltd filed Critical GPT Ltd
Priority to GB9620188A priority Critical patent/GB2319148B/en
Publication of GB9620188D0 publication Critical patent/GB9620188D0/en
Publication of GB2319148A publication Critical patent/GB2319148A/en
Application granted granted Critical
Publication of GB2319148B publication Critical patent/GB2319148B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H04L1/206—Arrangements for detecting or preventing errors in the information received using signal quality detector for modulated signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB9620188A 1996-09-27 1996-09-27 Noise level determination Expired - Fee Related GB2319148B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9620188A GB2319148B (en) 1996-09-27 1996-09-27 Noise level determination

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9620188A GB2319148B (en) 1996-09-27 1996-09-27 Noise level determination

Publications (3)

Publication Number Publication Date
GB9620188D0 GB9620188D0 (en) 1996-11-13
GB2319148A GB2319148A (en) 1998-05-13
GB2319148B true GB2319148B (en) 1999-01-13

Family

ID=10800600

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9620188A Expired - Fee Related GB2319148B (en) 1996-09-27 1996-09-27 Noise level determination

Country Status (1)

Country Link
GB (1) GB2319148B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11313043A (en) * 1998-02-27 1999-11-09 Nec Corp Multicarrier transmission system, transmission equipment and transmission method
GB2355164B (en) * 1999-10-07 2004-06-09 Oak Technology Inc Demodulator circuit
US7106810B2 (en) 1999-10-07 2006-09-12 Matthew James Collins Method and apparatus for a demodulator circuit
ATE422749T1 (en) 2004-12-15 2009-02-15 Alcatel Lucent METHOD FOR NOISE MEASUREMENT AND CORRESPONDING RECEIVING DSL MODEM.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4713829A (en) * 1985-06-19 1987-12-15 Codex Corporation Coded modulation system with a simplified decoder capable of reducing the effects of channel distortion
US5481567A (en) * 1994-09-12 1996-01-02 At&T Corp. Method and apparatus for automatically adapting the amount of warping in a system transmitting information through a non-linear channel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4713829A (en) * 1985-06-19 1987-12-15 Codex Corporation Coded modulation system with a simplified decoder capable of reducing the effects of channel distortion
US5481567A (en) * 1994-09-12 1996-01-02 At&T Corp. Method and apparatus for automatically adapting the amount of warping in a system transmitting information through a non-linear channel

Also Published As

Publication number Publication date
GB2319148A (en) 1998-05-13
GB9620188D0 (en) 1996-11-13

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Legal Events

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

Effective date: 20000927