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MY130820A - Channel estimation for a cdma system using pre-defined symbols in addition to pilot symbols - Google Patents

Channel estimation for a cdma system using pre-defined symbols in addition to pilot symbols

Info

Publication number
MY130820A
MY130820A MYPI9905457A MY130820A MY 130820 A MY130820 A MY 130820A MY PI9905457 A MYPI9905457 A MY PI9905457A MY 130820 A MY130820 A MY 130820A
Authority
MY
Malaysia
Prior art keywords
symbols
correlated
pilot symbols
symbol
predefined pilot
Prior art date
Application number
Inventor
Cavander Hans
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 MY130820A publication Critical patent/MY130820A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0212—Channel estimation of impulse response
    • H04L25/0214—Channel estimation of impulse response of a single coefficient
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • 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
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception

Landscapes

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

Abstract

SYSTEMS AND METHODS FOR IMPROVED CHANNEL ESTIMATION FOR A WCDMA SYSTEM. IN A RAKE RECEIVER, PREDEFINED PILOT SYMBOLS AND A TRANSMITTER POWER CONTROL (TPC) SYMBOL ARE RECEIVED IN A TIME SLOT AND CORRELATED TO DETERMINE THE TRANSMITTED PREDEFINED PILOT SYMBOLS AND THE TRANSMITTED TPC SYMBOL. THE CORRELATED PREDEFINED PILOT SYMBOLS AND THE CORRELATED TPS SYMBOL ARE COMPARED TO THE TRANSMITTED PREDEFINED PILOT SYMBOLS AND TPC SYMBOL. BASED UPON THE DIFFERENCE BETWEEN THE RECEIVED VERSION AND CORRELATED VERSION OF THE SYMBOLS AN ESTIMATION OF CHANNEL IMPAIRMENTS CAN BE CALCULATED. BASED UPON THE ESTIMATION THE RECEIVED DATA SYMBOLS MAY BE MORE ACCURATELY CORRELATED TO THEIR CORRECT VALUES.(FIG. 1)
MYPI9905457 1998-12-16 1999-12-15 Channel estimation for a cdma system using pre-defined symbols in addition to pilot symbols MY130820A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US21225898A 1998-12-16 1998-12-16

Publications (1)

Publication Number Publication Date
MY130820A true MY130820A (en) 2007-07-31

Family

ID=22790260

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI9905457 MY130820A (en) 1998-12-16 1999-12-15 Channel estimation for a cdma system using pre-defined symbols in addition to pilot symbols

Country Status (7)

Country Link
JP (1) JP2002533007A (en)
CN (1) CN1192506C (en)
AU (1) AU3092600A (en)
DE (1) DE19983814T1 (en)
GB (1) GB2363553B (en)
MY (1) MY130820A (en)
WO (1) WO2000036760A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001186082A (en) * 1999-12-24 2001-07-06 Matsushita Electric Ind Co Ltd Cdma mobile communication system and method
FR2814011B1 (en) * 2000-09-14 2003-10-24 France Telecom OPTIMAL ESTIMATION METHOD OF A PROPAGATION CHANNEL BASED ONLY ON PILOT SYMBOLS AND CORRESPONDING ESTIMATOR
CN1157880C (en) * 2000-09-25 2004-07-14 华为技术有限公司 Multi-slot power control method
AU2001212666A1 (en) * 2000-11-09 2002-05-21 Linkair Communications. Inc. A channel estimating method and apparatus thereof
DE60129111T2 (en) * 2001-05-29 2008-02-28 Lucent Technologies Inc. Channel estimation in a CDMA system with coded control symbols as additional pilot symbols
JP3562502B2 (en) * 2001-09-27 2004-09-08 日本電気株式会社 CDMA receiver and channel estimation method for the same
EP1560388B1 (en) * 2002-08-06 2012-03-21 ZTE Corporation A method of channel estimation in wideband CDMA communication
FR2851383A1 (en) * 2003-02-17 2004-08-20 Wavecom METHOD FOR TRANSMITTING RADIO DATA, SIGNAL, SYSTEM AND DEVICES THEREOF
US7366137B2 (en) 2003-05-31 2008-04-29 Qualcomm Incorporated Signal-to-noise estimation in wireless communication devices with receive diversity
CN100362762C (en) * 2003-12-29 2008-01-16 华为技术有限公司 An apparatus and method for implementing data signal mode decision
US7453920B2 (en) 2004-03-09 2008-11-18 Atc Technologies, Llc Code synchronization in CDMA satellite wireless communications system using uplink channel detection
EP2753036B1 (en) 2013-01-08 2016-09-07 Freescale Semiconductor, Inc. Channel estimation in wireless communication
US9118515B2 (en) 2014-01-08 2015-08-25 Freescale Semiconductor, Inc. Channel estimation in wireless communication
CN105282059A (en) 2014-06-30 2016-01-27 深圳市中兴微电子技术有限公司 Multi-path selection method and equipment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5263026A (en) * 1991-06-27 1993-11-16 Hughes Aircraft Company Maximum likelihood sequence estimation based equalization within a mobile digital cellular receiver
WO1995035615A1 (en) * 1994-06-22 1995-12-28 Ntt Mobile Communications Network Inc. Synchronous detector and synchronizing method for digital communication receiver
US5619524A (en) * 1994-10-04 1997-04-08 Motorola, Inc. Method and apparatus for coherent communication reception in a spread-spectrum communication system
FR2747870B1 (en) * 1996-04-19 1998-11-06 Wavecom Sa DIGITAL SIGNAL WITH MULTIPLE REFERENCE BLOCKS FOR CHANNEL ESTIMATION, CHANNEL ESTIMATION METHODS AND CORRESPONDING RECEIVERS

Also Published As

Publication number Publication date
GB0116741D0 (en) 2001-08-29
CN1192506C (en) 2005-03-09
DE19983814T1 (en) 2001-12-13
JP2002533007A (en) 2002-10-02
AU3092600A (en) 2000-07-03
WO2000036760A1 (en) 2000-06-22
GB2363553B (en) 2003-12-03
CN1334997A (en) 2002-02-06
GB2363553A (en) 2001-12-19

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