AU2002223441A1 - Method and devices for compensating for interferences by multipath reception - Google Patents

Method and devices for compensating for interferences by multipath reception

Info

Publication number
AU2002223441A1
AU2002223441A1 AU2002223441A AU2344102A AU2002223441A1 AU 2002223441 A1 AU2002223441 A1 AU 2002223441A1 AU 2002223441 A AU2002223441 A AU 2002223441A AU 2344102 A AU2344102 A AU 2344102A AU 2002223441 A1 AU2002223441 A1 AU 2002223441A1
Authority
AU
Australia
Prior art keywords
subscriber stations
compensation
base station
interferences
compensating
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.)
Abandoned
Application number
AU2002223441A
Inventor
Andreas Hachenberger
Klaus Jackel
Klaus Jaeger
Eberhard Kramp
Mathias Reibe
Bruno Stadler
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.)
IQ Wireless GmbH
Original Assignee
IQ Wireless GmbH
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 IQ Wireless GmbH filed Critical IQ Wireless GmbH
Publication of AU2002223441A1 publication Critical patent/AU2002223441A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H04L25/03057—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a recursive structure
    • 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
    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03343—Arrangements at the transmitter end
    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03433—Arrangements for removing intersymbol interference characterised by equaliser structure
    • H04L2025/03439—Fixed structures
    • H04L2025/03445—Time domain
    • H04L2025/03471—Tapped delay lines
    • H04L2025/03484—Tapped delay lines time-recursive
    • H04L2025/0349—Tapped delay lines time-recursive as a feedback filter

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Noise Elimination (AREA)
  • Radio Transmission System (AREA)

Abstract

For a stationary radio communications system, which comprises a base station (1) and a multitude of subscriber stations (4), that operate in the air interface (3) with DS CDM/CDMA and with an embedded TDM/TDMA and TDD, the channel pulse response is determined by means of an offline method, which is capable of identifying and taking into account the instance of a non-RICE channel. Calculation methods for equalizer coefficients in the I and Q branches are provided for carrying out a complex valent compensation, and digital equalizers having combined feedforward and feedback are used, whereby for the transmission path from the subscriber stations to the base station, a compensation by pre-equalization ensues inside the subscriber stations. The method can be advantageously used in WLL systems (wireless local loop).
AU2002223441A 2000-11-07 2001-09-25 Method and devices for compensating for interferences by multipath reception Abandoned AU2002223441A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10056088A DE10056088B4 (en) 2000-11-07 2000-11-07 Method and apparatus for compensating interference by multipath propagation in a radio communication system
DE10056088.1 2000-11-07
PCT/DE2001/003720 WO2002039687A1 (en) 2000-11-07 2001-09-25 Method and devices for compensating for interferences by multipath reception

Publications (1)

Publication Number Publication Date
AU2002223441A1 true AU2002223441A1 (en) 2002-05-21

Family

ID=7663061

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2002223441A Abandoned AU2002223441A1 (en) 2000-11-07 2001-09-25 Method and devices for compensating for interferences by multipath reception

Country Status (5)

Country Link
EP (1) EP1332591B1 (en)
AT (1) ATE378760T1 (en)
AU (1) AU2002223441A1 (en)
DE (2) DE10056088B4 (en)
WO (1) WO2002039687A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10320420B4 (en) * 2003-05-07 2005-05-25 Siemens Ag Arrangement and method for the digital predistortion of a complex baseband input signal

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4240249C1 (en) * 1992-11-25 1994-05-05 Andreas Hachencerger Switching device and method for a radio telephony system with the character of a local or branch exchange
US5377226A (en) * 1993-10-19 1994-12-27 Hughes Aircraft Company Fractionally-spaced equalizer for a DS-CDMA system
US5809086A (en) * 1996-03-20 1998-09-15 Lucent Technologies Inc. Intelligent timing recovery for a broadband adaptive equalizer
GB2313981B (en) * 1996-06-06 2001-04-18 Roke Manor Research Assymetric communications channel for a portable computer
US5905719A (en) * 1996-09-19 1999-05-18 Bell Communications Research, Inc. Method and system for wireless internet access
US5910946A (en) * 1997-01-13 1999-06-08 Samsung Electronics Co., Ltd. Wireless internet network architecture for voice and data communications
US6151628A (en) * 1997-07-03 2000-11-21 3Com Corporation Network access methods, including direct wireless to internet access
EP1072116A4 (en) * 1998-04-17 2005-08-03 Telcordia Tech Inc A wireless internet access method and system
US7286590B1 (en) * 1998-04-24 2007-10-23 Robert Bosch Gmbh Method for the transmission of data, and apparatus for the transmission of data
WO1999062268A2 (en) * 1998-05-29 1999-12-02 Palm, Inc. Method and apparatus for communicating information over low bandwidth communications networks
US6263030B1 (en) * 1998-07-01 2001-07-17 Ericsson Inc. Equalizer with channel tracker switching
AU6633800A (en) * 1999-08-13 2001-03-13 Broadcom Corporation Decision feedback equalizer and precoder ramping circuit

Also Published As

Publication number Publication date
DE10056088A1 (en) 2002-05-29
DE50113274D1 (en) 2007-12-27
WO2002039687B1 (en) 2002-07-25
DE10056088B4 (en) 2006-01-12
WO2002039687A1 (en) 2002-05-16
WO2002039687A8 (en) 2002-09-06
EP1332591A1 (en) 2003-08-06
EP1332591B1 (en) 2007-11-14
ATE378760T1 (en) 2007-11-15

Similar Documents

Publication Publication Date Title
UA86364C2 (en) Method, system and data carrier for downlink high speed data transfer
TW200718086A (en) Wireless base station and method for transmitting data common to users
CN101273596B (en) Receiver technology for radio communication
WO2009137349A3 (en) Method and apparatus for providing channel quality feedback in an orthogonal frequency division multiplexing communication system
WO2002058271A3 (en) Frequency domain equalisation with decision feedback
DE60219977D1 (en) Data transfer rate control on the uplink for each mobile station
IL194766A0 (en) Downlink power control for multiple downlink time slots in tdd communication systems
EP1776773A4 (en) Uplink transmission power control in wireless communication system
GB2441280A (en) Intercarrier interference cancellation for a multi-user system
MY148201A (en) Apparatus and method capable of improved coexistence of multiple wireless communication techniques
TW200611583A (en) Transfer rater control method, transmission power control method, transmission power ratio control method, mobile communication system, mobile station, and radio base
EP0520969A3 (en) Maximum likelihood sequence estimation for a mobile digital cellular radio receiver
PL1829255T3 (en) Open-loop rate control for a tdd communication system
WO2007130011A8 (en) Method and system for processing reference signals in ofdm systems using transmission time interval groupings
WO2005115022A3 (en) Non-frequency translating repeater with detection and media access control
EP2202922A3 (en) Apparatus and an associated method for facilitating communications in a radio communication system that provides for data communications at multiple data rates
EP1175120A4 (en) Mobile station apparatus, base station apparatus, and method for allotting radio communication channels
AU2003224544A1 (en) Method and apparatus for uplink transmission timing in a mobile communications system
TW200711497A (en) Transmission rate control method and mobile station
ATE526735T1 (en) METHOD AND DEVICE FOR TRANSMISSION DURING THE PROTECTION INTERVAL
WO2008058083A3 (en) Multimode point-to-multipoint base-station for supporting both ofdm and ofdma subscribers
AU2001289558A1 (en) Method for conducting data communications with subscriber stations, and radio communications network for implementing said method
WO2001078321A3 (en) Method for transmitting broadband, ip-based data streams in a point-to-many-points communications network
WO2002009309A3 (en) Power control in a radio communication system
HK1069704A1 (en) Data transmission method in a cellular communication network, corresponding system, terminal and base station