WO2001056197A3 - Digital downstream communication system - Google Patents

Digital downstream communication system Download PDF

Info

Publication number
WO2001056197A3
WO2001056197A3 PCT/US2001/002503 US0102503W WO0156197A3 WO 2001056197 A3 WO2001056197 A3 WO 2001056197A3 US 0102503 W US0102503 W US 0102503W WO 0156197 A3 WO0156197 A3 WO 0156197A3
Authority
WO
WIPO (PCT)
Prior art keywords
analog
digital
electrical signal
bandwidth
frequency
Prior art date
Application number
PCT/US2001/002503
Other languages
French (fr)
Other versions
WO2001056197A2 (en
Inventor
Forrest M Farhan
Original Assignee
Scientific Atlanta
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 Scientific Atlanta filed Critical Scientific Atlanta
Publication of WO2001056197A2 publication Critical patent/WO2001056197A2/en
Publication of WO2001056197A3 publication Critical patent/WO2001056197A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/22—Adaptations for optical transmission
    • 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
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters
    • H04B10/504—Laser transmitters using direct modulation

Abstract

A broadband communication system includes an optical transmitter (410) for receiving an analog electrical signal and transmitting a digital optical signal. The transmitter (410) includes an analog filter (415) having a bandwidth for filtering the analog electrical signal to generate a bandwidth-limited analog signal having a lower frequency and an upper frequency. The bandwidth-limited analog signal is sampled by an analog-to-digital converter (415) at a sampling frequency that equals or exceeds the bandwidth of the analog filter (408), thereby generating a digital electrical signal that is shifted in frequency from the analog electrical signal. The lower frequency of the bandwidth-limited analog signal is greater than the sampling frequency used by the converter (415). A digital filter (422) then processes the output of the analog-to-digital converter (415) to pass the digital electrical signal that is frequency-shifted, and a laser transmitter (435) that transmits the digital electrical signal.
PCT/US2001/002503 2000-01-28 2001-01-25 Digital downstream communication system WO2001056197A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US49409700A 2000-01-28 2000-01-28
US09/494,097 2000-01-28

Publications (2)

Publication Number Publication Date
WO2001056197A2 WO2001056197A2 (en) 2001-08-02
WO2001056197A3 true WO2001056197A3 (en) 2002-01-17

Family

ID=23963025

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/002503 WO2001056197A2 (en) 2000-01-28 2001-01-25 Digital downstream communication system

Country Status (1)

Country Link
WO (1) WO2001056197A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE49377E1 (en) 2002-12-03 2023-01-17 Commscope Technologies Llc Distributed digital antenna system

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2094058B1 (en) 2000-03-27 2013-01-16 LGC Wireless, LLC A radio frequency signal distribution system
US6704545B1 (en) 2000-07-19 2004-03-09 Adc Telecommunications, Inc. Point-to-multipoint digital radio frequency transport
US8380143B2 (en) 2002-05-01 2013-02-19 Dali Systems Co. Ltd Power amplifier time-delay invariant predistortion methods and apparatus
US8811917B2 (en) 2002-05-01 2014-08-19 Dali Systems Co. Ltd. Digital hybrid mode power amplifier system
CN104202279A (en) 2006-12-26 2014-12-10 大力系统有限公司 Method and system for baseband predistortion linearization in multi-channel wideband communication systems
CN103180844B (en) 2010-08-17 2017-10-03 大力系统有限公司 Neutral host architecture for distributing antenna system
US8682338B2 (en) 2010-09-14 2014-03-25 Dali Systems Co., Ltd. Remotely reconfigurable distributed antenna system and methods
US10499269B2 (en) 2015-11-12 2019-12-03 Commscope Technologies Llc Systems and methods for assigning controlled nodes to channel interfaces of a controller
CN115276805B (en) * 2022-06-27 2023-08-29 深圳麦科信科技有限公司 Laser transmission circuit, laser transmission assembly and electronic measuring instrument

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5032908A (en) * 1989-10-23 1991-07-16 Westinghouse Electric Corp. High definition television acoustic charge transport filter bank
US5644622A (en) * 1992-09-17 1997-07-01 Adc Telecommunications, Inc. Cellular communications system with centralized base stations and distributed antenna units

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5032908A (en) * 1989-10-23 1991-07-16 Westinghouse Electric Corp. High definition television acoustic charge transport filter bank
US5644622A (en) * 1992-09-17 1997-07-01 Adc Telecommunications, Inc. Cellular communications system with centralized base stations and distributed antenna units

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE49377E1 (en) 2002-12-03 2023-01-17 Commscope Technologies Llc Distributed digital antenna system

Also Published As

Publication number Publication date
WO2001056197A2 (en) 2001-08-02

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