WO2001018976A3 - Method and arrangement for beam forming for the downlink channel in cdma-based mobile radio telephone systems - Google Patents

Method and arrangement for beam forming for the downlink channel in cdma-based mobile radio telephone systems Download PDF

Info

Publication number
WO2001018976A3
WO2001018976A3 PCT/DE2000/003121 DE0003121W WO0118976A3 WO 2001018976 A3 WO2001018976 A3 WO 2001018976A3 DE 0003121 W DE0003121 W DE 0003121W WO 0118976 A3 WO0118976 A3 WO 0118976A3
Authority
WO
WIPO (PCT)
Prior art keywords
paths
cdma
beam forming
radio telephone
downlink channel
Prior art date
Application number
PCT/DE2000/003121
Other languages
German (de)
French (fr)
Other versions
WO2001018976A2 (en
Inventor
Holger Boche
Martin Schubert
Original Assignee
Holger Boche
Martin Schubert
Hertz Inst Heinrich
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 Holger Boche, Martin Schubert, Hertz Inst Heinrich filed Critical Holger Boche
Priority to EP00974312A priority Critical patent/EP1214798A2/en
Priority to AU12680/01A priority patent/AU1268001A/en
Publication of WO2001018976A2 publication Critical patent/WO2001018976A2/en
Publication of WO2001018976A3 publication Critical patent/WO2001018976A3/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
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • H01Q3/2611—Means for null steering; Adaptive interference nulling
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

The invention relates to a method for beam forming for the downlink channel in CDMA-based mobile radio telephone systems. The K most powerful paths are selected from paths with estimated directions and estimated power of the signals that are received by an antenna array in the base station, whereby said most powerful paths are selected for the uplink channel. The directional characteristic and directivity are calculated for said paths as well as for the paths whose power decreases (K-1). An iteration process is subsequently carried out in view of a threshold value which is determined according to the application and may not be exceeded. The signal that is designed for the mobile station and pertains to the base station is finally generated by multiplying the kth weight factor with the signal to be sent to the mobile station.
PCT/DE2000/003121 1999-09-06 2000-09-06 Method and arrangement for beam forming for the downlink channel in cdma-based mobile radio telephone systems WO2001018976A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP00974312A EP1214798A2 (en) 1999-09-06 2000-09-06 Method and arrangement for beam forming for the downlink channel in cdma-based mobile radio telephone systems
AU12680/01A AU1268001A (en) 1999-09-06 2000-09-06 Method and arrangement for beam forming for the downlink channel in cdma-based mobile radio telephone systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19943688.6 1999-09-06
DE19943688A DE19943688C2 (en) 1999-09-06 1999-09-06 Method and arrangement for beam shaping for the downlink channel in CDMA-based mobile radio systems

Publications (2)

Publication Number Publication Date
WO2001018976A2 WO2001018976A2 (en) 2001-03-15
WO2001018976A3 true WO2001018976A3 (en) 2001-08-02

Family

ID=7921759

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2000/003121 WO2001018976A2 (en) 1999-09-06 2000-09-06 Method and arrangement for beam forming for the downlink channel in cdma-based mobile radio telephone systems

Country Status (4)

Country Link
EP (1) EP1214798A2 (en)
AU (1) AU1268001A (en)
DE (1) DE19943688C2 (en)
WO (1) WO2001018976A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10123334A1 (en) * 2001-05-14 2002-12-05 Infineon Technologies Ag RAKE receiver for FDD and TDD mode
CN102457313A (en) * 2010-10-22 2012-05-16 中兴通讯股份有限公司 Method and device for finishing multi-user multi-layer beam forming in time division duplex
CN102457324B (en) * 2010-10-29 2015-12-16 中兴通讯股份有限公司 A kind of frequency division duplex system descending multi-user multipath beam form-endowing method and device
CN102457320A (en) * 2010-11-01 2012-05-16 中兴通讯股份有限公司 Method for forming downlink multi-user multi-path wave beam of FDD (Frequency Division Duplexing) system and device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3300252B2 (en) * 1997-04-02 2002-07-08 松下電器産業株式会社 Adaptive transmission diversity apparatus and adaptive transmission diversity method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JENG S -S ET AL: "EXPERIMENTAL EVALUATION OF SMART ANTENNA SYSTEM PERFORMANCE FOR WIRELESS COMMUNICATIONS", IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION,IEEE INC. NEW YORK,US, vol. 46, no. 6, 1 June 1998 (1998-06-01), pages 749 - 757, XP000766083, ISSN: 0018-926X *
KUHWALD ET AL: "A New Optimum Constrained Beamforming-Algorithm for Future Mobile Communicaiton Systems Based on CDMA", PROC. 4TH ACTS MOBILE COMMUNICATIONS SUMMIT, June 1999 (1999-06-01), pages 963 - 968, XP000986632 *

Also Published As

Publication number Publication date
DE19943688A1 (en) 2001-04-12
WO2001018976A2 (en) 2001-03-15
DE19943688C2 (en) 2001-09-13
AU1268001A (en) 2001-04-10
EP1214798A2 (en) 2002-06-19

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