WO2002011301A3 - Improved delay combiner system for cdma repeaters and low noise amplifiers - Google Patents

Improved delay combiner system for cdma repeaters and low noise amplifiers Download PDF

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Publication number
WO2002011301A3
WO2002011301A3 PCT/US2001/023885 US0123885W WO0211301A3 WO 2002011301 A3 WO2002011301 A3 WO 2002011301A3 US 0123885 W US0123885 W US 0123885W WO 0211301 A3 WO0211301 A3 WO 0211301A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
low noise
cdma
diversity
delay
Prior art date
Application number
PCT/US2001/023885
Other languages
French (fr)
Other versions
WO2002011301A2 (en
Inventor
Matthew P Fuerter
Original Assignee
Repeater 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 Repeater Technologies Inc filed Critical Repeater Technologies Inc
Priority to AU2001279086A priority Critical patent/AU2001279086A1/en
Publication of WO2002011301A2 publication Critical patent/WO2002011301A2/en
Publication of WO2002011301A3 publication Critical patent/WO2002011301A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0891—Space-time diversity
    • H04B7/0894—Space-time diversity using different delays between antennas
    • 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • 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
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/10—Polarisation diversity; Directional diversity

Abstract

Signal delay and combining techniques are used with multipath signals to provide signal diversity gain within CDMA over-the-air repeater and low noise amplifier systems. An incoming signal from a remote user is typically processed through two processing paths, wherein a differential delay is provided between the two processing paths, such as by one or more delay elements and/or filters, and is applied to the processed signal. The two signal paths are then combined and filtered through a sharp band pass filter, preferably a SAW filter. The gain of the two processing paths is typically balanced, to preserve the signal quality of the combined diversity signal. In an over the air repeater, the filtered signal is retransmitted towards a CDMA rake receiver at a base station, which can process the multipath signal to produce a clean signal representation. In a low noise amplifier, the filtered signal is transferred directly into a base station or repeater. The use of SAW filters protect the latter stages of the low noise amplifier, and also protect the base station from out-of-band signal interference. A quadruple diversity low noise amplification system for base stations embodiment is also disclosed, which provides quadruple diversity and improved sensitivity for CDMA base stations. Preferred embodiments of the delay combiner system provide adaptive gain balancing.
PCT/US2001/023885 2000-08-01 2001-07-27 Improved delay combiner system for cdma repeaters and low noise amplifiers WO2002011301A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001279086A AU2001279086A1 (en) 2000-08-01 2001-07-27 Improved delay combiner system for cdma repeaters and low noise amplifiers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US63020000A 2000-08-01 2000-08-01
US09/630,200 2000-08-01

Publications (2)

Publication Number Publication Date
WO2002011301A2 WO2002011301A2 (en) 2002-02-07
WO2002011301A3 true WO2002011301A3 (en) 2002-05-30

Family

ID=24526204

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/023885 WO2002011301A2 (en) 2000-08-01 2001-07-27 Improved delay combiner system for cdma repeaters and low noise amplifiers

Country Status (1)

Country Link
WO (1) WO2002011301A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7684776B2 (en) * 2002-12-24 2010-03-23 Intel Corporation Wireless communication device having variable gain device and method therefor
CA2421341A1 (en) * 2003-03-07 2004-09-07 Spotwave Wireless Inc. Distributed adaptive repeater system
WO2007102684A1 (en) * 2006-03-06 2007-09-13 Airpoint Co., Ltd. Appararus and method for cancellating interference signal of mobile communication repeater
AU2008260449A1 (en) 2007-06-01 2008-12-11 Nextivity, Inc. Short range booster and methods for boosting with multiple antennas
WO2010053412A2 (en) * 2008-11-04 2010-05-14 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement for enabling improved quality for noise limited uplink signals
US10292067B2 (en) 2013-11-25 2019-05-14 At&T Intellectual Property I, L.P. Collaborative scheduling of last hop cellular traffic

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997024818A1 (en) * 1995-12-28 1997-07-10 Qualcomm Incorporated Method and apparatus for providing antenna diversity in a portable radiotelephone
US5652765A (en) * 1993-08-06 1997-07-29 Ntt Mobile Communications Network Inc. Receiver and repeater for spread spectrum communications
US5828658A (en) * 1991-12-12 1998-10-27 Arraycomm, Inc. Spectrally efficient high capacity wireless communication systems with spatio-temporal processing
WO1999014870A2 (en) * 1997-09-15 1999-03-25 Adaptive Telecom, Inc. Practical space-time radio method for cdma communication capacity enhancement
WO1999044308A1 (en) * 1998-02-24 1999-09-02 Repeater Technologies, Inc. Delay combiner system for cdma repeaters and low noise amplifiers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5828658A (en) * 1991-12-12 1998-10-27 Arraycomm, Inc. Spectrally efficient high capacity wireless communication systems with spatio-temporal processing
US5652765A (en) * 1993-08-06 1997-07-29 Ntt Mobile Communications Network Inc. Receiver and repeater for spread spectrum communications
WO1997024818A1 (en) * 1995-12-28 1997-07-10 Qualcomm Incorporated Method and apparatus for providing antenna diversity in a portable radiotelephone
WO1999014870A2 (en) * 1997-09-15 1999-03-25 Adaptive Telecom, Inc. Practical space-time radio method for cdma communication capacity enhancement
WO1999044308A1 (en) * 1998-02-24 1999-09-02 Repeater Technologies, Inc. Delay combiner system for cdma repeaters and low noise amplifiers

Also Published As

Publication number Publication date
WO2002011301A2 (en) 2002-02-07

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