WO2003073661A3 - 3g radio - Google Patents

3g radio Download PDF

Info

Publication number
WO2003073661A3
WO2003073661A3 PCT/US2003/005537 US0305537W WO03073661A3 WO 2003073661 A3 WO2003073661 A3 WO 2003073661A3 US 0305537 W US0305537 W US 0305537W WO 03073661 A3 WO03073661 A3 WO 03073661A3
Authority
WO
WIPO (PCT)
Prior art keywords
filter
receiver
transients
offset
time
Prior art date
Application number
PCT/US2003/005537
Other languages
French (fr)
Other versions
WO2003073661A2 (en
Inventor
Simon Atkinson
Aidan Cahalane
Paul Ferguson Jr
Original Assignee
Analog Devices 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
Priority claimed from GBGB0204108.5A external-priority patent/GB0204108D0/en
Application filed by Analog Devices Inc filed Critical Analog Devices Inc
Priority to EP03716148A priority Critical patent/EP1476974A4/en
Priority to JP2003572218A priority patent/JP2005518757A/en
Publication of WO2003073661A2 publication Critical patent/WO2003073661A2/en
Publication of WO2003073661A3 publication Critical patent/WO2003073661A3/en

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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/30—Circuits for homodyne or synchrodyne receivers
    • 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
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • 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
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
    • H04L25/062—Setting decision thresholds using feedforward techniques only
    • 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
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
    • H04L25/063—Setting decision thresholds using feedback techniques only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation

Abstract

In a UMTS homodyne (direct conversion) receiver the local oscillator may break through as an 'on channel' signal. In order to remove this the receiver includes controllable DC offset generators (170) and variable gain amplifiers (142 and 152). These are in series with a high pass filter (140 and 150). Adjustments in the gain or offset can give rise to transients within the filter which effectively blind the receiver until such time as the transients have decayed within the filter. This blind time can be reduced by increasing the bandwidth of the filter during such a transient.
PCT/US2003/005537 2002-02-21 2003-02-21 3g radio WO2003073661A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP03716148A EP1476974A4 (en) 2002-02-21 2003-02-21 3g radio
JP2003572218A JP2005518757A (en) 2002-02-21 2003-02-21 3G wireless receiver

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB0204108.5A GB0204108D0 (en) 2002-02-21 2002-02-21 3G radio
GB0204108.5 2002-02-21
US10/331,621 2002-12-30
US10/331,621 US20030156668A1 (en) 2002-02-21 2002-12-30 3G radio

Publications (2)

Publication Number Publication Date
WO2003073661A2 WO2003073661A2 (en) 2003-09-04
WO2003073661A3 true WO2003073661A3 (en) 2004-03-04

Family

ID=27767095

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/005537 WO2003073661A2 (en) 2002-02-21 2003-02-21 3g radio

Country Status (4)

Country Link
EP (1) EP1476974A4 (en)
JP (1) JP2005518757A (en)
CN (1) CN1640085A (en)
WO (1) WO2003073661A2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4289667B2 (en) * 2003-09-16 2009-07-01 ソニー・エリクソン・モバイルコミュニケーションズ株式会社 Variable gain control circuit and receiver
US7643848B2 (en) * 2004-04-13 2010-01-05 Qualcomm, Incorporated Multi-antenna transceiver system
US7231193B2 (en) * 2004-04-13 2007-06-12 Skyworks Solutions, Inc. Direct current offset correction systems and methods
GB0419725D0 (en) * 2004-09-06 2004-10-06 Radioscape Ltd DC offset cancellation for the reception of OFDM transmissions
CN101103538B (en) * 2005-01-14 2014-06-04 日本电气株式会社 Communication device, multi-band reception device, and reception device
JP4500187B2 (en) * 2005-03-08 2010-07-14 パナソニック株式会社 Direct conversion receiver
US7835467B2 (en) * 2006-01-05 2010-11-16 Qualcomm, Incorporated DC offset correction for high gain complex filter
US7672645B2 (en) 2006-06-15 2010-03-02 Bitwave Semiconductor, Inc. Programmable transmitter architecture for non-constant and constant envelope modulation
KR20120064834A (en) * 2010-12-10 2012-06-20 삼성전자주식회사 Apparatus and method for improving performance of rse in a multi-standby terminal
US9385763B1 (en) 2015-01-26 2016-07-05 Motorola Solutions, Inc. Method and apparatus for in-channel interference cancellation
CN108362941B (en) * 2018-03-29 2023-07-18 珠海迈科智能科技股份有限公司 Equipment and method for testing frequency deviation of Tuner module crystal oscillator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5757858A (en) * 1994-12-23 1998-05-26 Qualcomm Incorporated Dual-mode digital FM communication system
US6031878A (en) * 1997-02-28 2000-02-29 Maxim Integrated Products, Inc. Direct-conversion tuner integrated circuit for direct broadcast satellite television

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO329890B1 (en) * 1999-11-15 2011-01-17 Hitachi Ltd The mobile communication apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5757858A (en) * 1994-12-23 1998-05-26 Qualcomm Incorporated Dual-mode digital FM communication system
US6031878A (en) * 1997-02-28 2000-02-29 Maxim Integrated Products, Inc. Direct-conversion tuner integrated circuit for direct broadcast satellite television

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1476974A4 *

Also Published As

Publication number Publication date
EP1476974A4 (en) 2005-05-04
WO2003073661A2 (en) 2003-09-04
JP2005518757A (en) 2005-06-23
CN1640085A (en) 2005-07-13
EP1476974A2 (en) 2004-11-17

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