AR066646A1 - Estimacion parametrica de la covarianza de los recptores para la diversidad de tranmision - Google Patents

Estimacion parametrica de la covarianza de los recptores para la diversidad de tranmision

Info

Publication number
AR066646A1
AR066646A1 ARP080102135A ARP080102135A AR066646A1 AR 066646 A1 AR066646 A1 AR 066646A1 AR P080102135 A ARP080102135 A AR P080102135A AR P080102135 A ARP080102135 A AR P080102135A AR 066646 A1 AR066646 A1 AR 066646A1
Authority
AR
Argentina
Prior art keywords
covarianza
diversity
receivers
transmission
parametric estimation
Prior art date
Application number
ARP080102135A
Other languages
English (en)
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of AR066646A1 publication Critical patent/AR066646A1/es

Links

Classifications

    • 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
    • H04B7/04—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
    • H04B7/0619—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 using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0634—Antenna weights or vector/matrix coefficients
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/7097—Direct sequence modulation interference
    • H04B2201/709727—GRAKE type RAKE receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Radio Transmission System (AREA)
  • Eyeglasses (AREA)

Abstract

La invencion proporciona lentes oftálmicas utiles para prevenir el avance de la miopía. Las lentes de la invencion proporcionan una zona de potencia de vision a distancia sustancialmente constante en el centro de la zona optica rodeada por una zona que proporciona aberracion esférica longitudinal positiva.
ARP080102135A 2007-05-21 2008-05-20 Estimacion parametrica de la covarianza de los recptores para la diversidad de tranmision AR066646A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/751,109 US7848387B2 (en) 2007-05-21 2007-05-21 Receiver parametric covariance estimation for transmit diversity

Publications (1)

Publication Number Publication Date
AR066646A1 true AR066646A1 (es) 2009-09-02

Family

ID=39711395

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP080102135A AR066646A1 (es) 2007-05-21 2008-05-20 Estimacion parametrica de la covarianza de los recptores para la diversidad de tranmision

Country Status (5)

Country Link
US (1) US7848387B2 (es)
EP (1) EP2151070B1 (es)
JP (1) JP5341880B2 (es)
AR (1) AR066646A1 (es)
WO (1) WO2008141991A1 (es)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7933345B2 (en) * 2006-12-20 2011-04-26 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for determining combining weights for MIMO receivers
US8644288B2 (en) * 2008-07-31 2014-02-04 Motorola Mobility Llc Uplink spatial division multiple access (SDMA) user pairing and scheduling
US8411780B2 (en) * 2009-02-24 2013-04-02 Telefonaktiebolaget Lm Ericsson (Publ) Estimating the ratio of traffic channel power to pilot power in a MIMO wireless communication system
US8233517B2 (en) * 2009-07-28 2012-07-31 Telefonaktiebolaget L M Ericsson (Publ) Pilot-based SINR estimation for MIMO systems
WO2012096601A1 (en) * 2011-01-13 2012-07-19 Telefonaktiebolaget L M Ericsson (Publ) Estimation of channel quality indicator using additional reference signals
US8855172B2 (en) 2011-12-09 2014-10-07 Telefonaktiebolaget Lm Ericsson (Publ) Non-redundant equalization
US9571185B2 (en) * 2013-05-20 2017-02-14 Telefonaktiebolaget Lm Ericsson (Publ) Robust, fast unused-code detection

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6005887A (en) 1996-11-14 1999-12-21 Ericcsson, Inc. Despreading of direct sequence spread spectrum communications signals
US6285861B1 (en) 1999-06-14 2001-09-04 Qualcomm Incorporated Receiving station with interference signal suppression
US7769078B2 (en) 2000-12-22 2010-08-03 Telefonaktiebolaget Lm Ericsson (Publ) Apparatus, methods and computer program products for delay selection in a spread-spectrum receiver
US6738020B1 (en) 2001-07-31 2004-05-18 Arraycomm, Inc. Estimation of downlink transmission parameters in a radio communications system with an adaptive antenna array
US7149258B2 (en) 2001-11-28 2006-12-12 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for estimation of phase offset between communication channels
US7539240B2 (en) * 2004-03-12 2009-05-26 Telefonaftiebolaget Lm Ericsson (Publ) Method and apparatus for parameter estimation in a generalized rake receiver
US7848389B2 (en) * 2004-03-12 2010-12-07 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for scaling parameter estimation in parametric generalized rake receivers
JP4723564B2 (ja) 2004-03-12 2011-07-13 テレフオンアクチーボラゲット エル エム エリクソン（パブル） 受信信号品質を推定する方法および装置
US7536158B2 (en) 2004-03-29 2009-05-19 Telefonaktiebolaget Lm Ericsson (Publ) Impairment correlation estimation in a spread spectrum system
US7539262B2 (en) 2004-12-14 2009-05-26 Interdigital Technology Corporation Method and apparatus for performing chip level equalization using joint processing
US7751511B2 (en) * 2006-10-19 2010-07-06 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for selecting a subset of modeled impairment correlation terms for use in received signal processing

Also Published As

Publication number Publication date
EP2151070B1 (en) 2016-02-17
US7848387B2 (en) 2010-12-07
JP5341880B2 (ja) 2013-11-13
JP2010528510A (ja) 2010-08-19
EP2151070A1 (en) 2010-02-10
WO2008141991A1 (en) 2008-11-27
US20080291978A1 (en) 2008-11-27

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