GB9112870D0 - Fsk direct detection transmission system - Google Patents

Fsk direct detection transmission system

Info

Publication number
GB9112870D0
GB9112870D0 GB9112870A GB9112870A GB9112870D0 GB 9112870 D0 GB9112870 D0 GB 9112870D0 GB 9112870 A GB9112870 A GB 9112870A GB 9112870 A GB9112870 A GB 9112870A GB 9112870 D0 GB9112870 D0 GB 9112870D0
Authority
GB
United Kingdom
Prior art keywords
transmission system
direct detection
detection transmission
fsk
fsk direct
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.)
Withdrawn
Application number
GB9112870A
Other versions
GB2256761A (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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom 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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to GB9112870A priority Critical patent/GB2256761A/en
Publication of GB9112870D0 publication Critical patent/GB9112870D0/en
Publication of GB2256761A publication Critical patent/GB2256761A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/69—Electrical arrangements in the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/67—Optical arrangements in the receiver
    • H04B10/676—Optical arrangements in the receiver for all-optical demodulation of the input optical signal
    • 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)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Communication System (AREA)
GB9112870A 1991-06-14 1991-06-14 Fsk direct detection transmission system. Withdrawn GB2256761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9112870A GB2256761A (en) 1991-06-14 1991-06-14 Fsk direct detection transmission system.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9112870A GB2256761A (en) 1991-06-14 1991-06-14 Fsk direct detection transmission system.

Publications (2)

Publication Number Publication Date
GB9112870D0 true GB9112870D0 (en) 1991-07-31
GB2256761A GB2256761A (en) 1992-12-16

Family

ID=10696695

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9112870A Withdrawn GB2256761A (en) 1991-06-14 1991-06-14 Fsk direct detection transmission system.

Country Status (1)

Country Link
GB (1) GB2256761A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2320635A (en) 1996-12-19 1998-06-24 Northern Telecom Ltd Optical timing detection using an interferometer
GB9813412D0 (en) 1998-06-23 1998-08-19 Cambrian Systems Corp Optical FSK modulation and demodulation based on the thermal chirp for optical path overhead transfer using asymmetrical mach-zehnder interferometer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4723316A (en) * 1986-05-08 1988-02-02 American Telephone & Telegraph Company, At&T Bell Laboratories Polarization independent coherent optical heterodyne receivers

Also Published As

Publication number Publication date
GB2256761A (en) 1992-12-16

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)