CA2222945A1 - Range repeater for a transmission system - Google Patents

Range repeater for a transmission system

Info

Publication number
CA2222945A1
CA2222945A1 CA2222945A CA2222945A CA2222945A1 CA 2222945 A1 CA2222945 A1 CA 2222945A1 CA 2222945 A CA2222945 A CA 2222945A CA 2222945 A CA2222945 A CA 2222945A CA 2222945 A1 CA2222945 A1 CA 2222945A1
Authority
CA
Canada
Prior art keywords
repeater
signal
sampled input
transmission system
phase
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
CA2222945A
Other languages
French (fr)
Other versions
CA2222945C (en
Inventor
Qi Bi
Robert Evan Myer
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.)
Nokia of America Corp
Original Assignee
Lucent Technologies Inc
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 Lucent Technologies Inc filed Critical Lucent Technologies Inc
Publication of CA2222945A1 publication Critical patent/CA2222945A1/en
Application granted granted Critical
Publication of CA2222945C publication Critical patent/CA2222945C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15564—Relay station antennae loop interference reduction
    • H04B7/15578—Relay station antennae loop interference reduction by gain adjustment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels

Abstract

The invention is a repeater for a telecommunications transmission system such as a CDMA wireless system. The repeater reduces leakage by means of a feedback signal whose amplitude and phase are adjusted in response to the amplitude and phase of a sampled input signal when a switch turns off the normal output of the repeater for a short period of time. In one embodiment, a pilot signal is transmitted during this time period so that the sampled input is the leakage signal. In another embodiment, the sampled input is the normal transmission signal received during the time period.
CA002222945A 1996-12-30 1997-11-28 Range repeater for a transmission system Expired - Fee Related CA2222945C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/774,546 US5835848A (en) 1996-12-30 1996-12-30 Range repeater for a transmission system
US774,546 1996-12-30

Publications (2)

Publication Number Publication Date
CA2222945A1 true CA2222945A1 (en) 1998-06-30
CA2222945C CA2222945C (en) 2001-01-23

Family

ID=25101573

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002222945A Expired - Fee Related CA2222945C (en) 1996-12-30 1997-11-28 Range repeater for a transmission system

Country Status (6)

Country Link
US (1) US5835848A (en)
EP (1) EP0851606B1 (en)
JP (1) JP3316176B2 (en)
KR (1) KR100563386B1 (en)
CA (1) CA2222945C (en)
DE (1) DE69701317T2 (en)

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Also Published As

Publication number Publication date
US5835848A (en) 1998-11-10
KR100563386B1 (en) 2006-08-10
JPH10209940A (en) 1998-08-07
JP3316176B2 (en) 2002-08-19
EP0851606A3 (en) 1999-01-07
CA2222945C (en) 2001-01-23
EP0851606A2 (en) 1998-07-01
DE69701317T2 (en) 2000-07-27
DE69701317D1 (en) 2000-03-30
EP0851606B1 (en) 2000-02-23
KR19980064488A (en) 1998-10-07

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Effective date: 20081128