SE515035C2 - Metod och apparat för automatisk frekvenskontroll i en radiofrekvent mottagare - Google Patents

Metod och apparat för automatisk frekvenskontroll i en radiofrekvent mottagare

Info

Publication number
SE515035C2
SE515035C2 SE9202897A SE9202897A SE515035C2 SE 515035 C2 SE515035 C2 SE 515035C2 SE 9202897 A SE9202897 A SE 9202897A SE 9202897 A SE9202897 A SE 9202897A SE 515035 C2 SE515035 C2 SE 515035C2
Authority
SE
Sweden
Prior art keywords
signals
reliability
antennas
measure
error
Prior art date
Application number
SE9202897A
Other languages
English (en)
Swedish (sv)
Other versions
SE9202897D0 (sv
SE9202897L (sv
Inventor
Tomas O Baeckstroem
Anders B Sandell
Peter L Wahlstroem
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 SE9202897D0 publication Critical patent/SE9202897D0/xx
Publication of SE9202897L publication Critical patent/SE9202897L/
Publication of SE515035C2 publication Critical patent/SE515035C2/sv

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/026—Means preventing a wrong working of the automatic frequency correction in case of fading or bad signal/noise ratio
    • 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
    • H04B7/0848—Joint weighting
    • H04B7/0851—Joint weighting using training sequences or error signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Radio Transmission System (AREA)
SE9202897A 1991-10-09 1992-10-05 Metod och apparat för automatisk frekvenskontroll i en radiofrekvent mottagare SE515035C2 (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/774,215 US5321850A (en) 1991-10-09 1991-10-09 Diversity radio receiver automatic frequency control

Publications (3)

Publication Number Publication Date
SE9202897D0 SE9202897D0 (sv) 1992-10-05
SE9202897L SE9202897L (sv) 1993-04-10
SE515035C2 true SE515035C2 (sv) 2001-06-05

Family

ID=25100573

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9202897A SE515035C2 (sv) 1991-10-09 1992-10-05 Metod och apparat för automatisk frekvenskontroll i en radiofrekvent mottagare

Country Status (9)

Country Link
US (1) US5321850A (enExample)
JP (1) JP3295460B2 (enExample)
BR (1) BR9203907A (enExample)
CA (1) CA2080171C (enExample)
DE (1) DE4233965C2 (enExample)
GB (1) GB2260454B (enExample)
MX (1) MX9205755A (enExample)
SE (1) SE515035C2 (enExample)
TW (1) TW199949B (enExample)

Families Citing this family (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5561673A (en) * 1993-04-16 1996-10-01 Matsushita Electric Industrial Co., Ltd. Antenna switched diversity reciever
US5481570A (en) * 1993-10-20 1996-01-02 At&T Corp. Block radio and adaptive arrays for wireless systems
US6201801B1 (en) 1994-03-24 2001-03-13 Ericsson Inc. Polarization diversity phased array cellular base station and associated methods
US5724666A (en) * 1994-03-24 1998-03-03 Ericsson Inc. Polarization diversity phased array cellular base station and associated methods
US6151310A (en) * 1994-03-24 2000-11-21 Ericsson Inc. Dividable transmit antenna array for a cellular base station and associated method
MY113061A (en) * 1994-05-16 2001-11-30 Sanyo Electric Co Diversity reception device
JP3022194B2 (ja) * 1994-09-02 2000-03-15 三菱電機株式会社 ダイバーシチ受信装置
US5758266A (en) * 1994-09-30 1998-05-26 Qualcomm Incorporated Multiple frequency communication device
US5553102A (en) * 1994-12-01 1996-09-03 Motorola, Inc. Diversity reception communication system with maximum ratio combining method
JP3388938B2 (ja) * 1995-04-26 2003-03-24 富士通株式会社 ダイバーシチ受信機
US5918154A (en) * 1995-08-23 1999-06-29 Pcs Wireless, Inc. Communications systems employing antenna diversity
SG46175A1 (en) * 1996-01-10 1998-02-20 Philips Electronics Nv Tv/fm receiver for multi-media applications
KR0168796B1 (ko) * 1996-03-27 1999-02-01 김광호 다이버시티용 결합기에서 정규화 전압 발산 방지를 위한 정규화 회로
DE19618916B4 (de) * 1996-05-10 2008-04-17 Nokia Siemens Networks Gmbh & Co.Kg Verfahren zum Ausgleich eines Frequenz-Offsets in einer Empfangseinheit einer Funkstation in einem Mobil-Kommunikationssystem und derartige Empfangseinheit
KR19980033998A (ko) * 1996-11-04 1998-08-05 김광호 무선 전송 시스템에서 공간 다이버시티를 적용한 수신 장치 및 방법
US5878093A (en) * 1996-12-16 1999-03-02 Ericsson Inc. Interference rejection combining with frequency correction
JP3657377B2 (ja) * 1996-12-27 2005-06-08 松下電器産業株式会社 受信回路
US6097773A (en) * 1997-05-22 2000-08-01 Nortel Networks Limited Co-channel interference reduction
ATE208110T1 (de) * 1997-09-22 2001-11-15 Cit Alcatel Verfahren und vorrichtung zur bestimmung eines taktfehlers in einem mehrträgerübertragungssystem
SE520420C2 (sv) * 1997-10-28 2003-07-08 Ericsson Telefon Ab L M Anordning samt förfarande för att identifiera batterityp samt för att mäta batteritemperatur
JP3505468B2 (ja) * 2000-04-03 2004-03-08 三洋電機株式会社 無線装置
US6847688B1 (en) 2000-10-30 2005-01-25 Ericsson Inc. Automatic frequency control systems and methods for joint demodulation
US6947498B2 (en) * 2001-04-13 2005-09-20 Sarnoff Corporation Method and apparatus for performing joint timing recovery of multiple received signals
US6760386B2 (en) * 2001-07-27 2004-07-06 Motorola, Inc. Receiver and method therefor
US6751264B2 (en) 2001-07-27 2004-06-15 Motorola, Inc. Receiver and method therefor
US7173992B2 (en) * 2001-12-11 2007-02-06 Sasken Communication Technologies Limited Method for synchronization in wireless systems using receive diversity
US7447284B2 (en) 2003-03-28 2008-11-04 Freescale Semiconductor, Inc. Method and apparatus for signal noise control
US9026070B2 (en) * 2003-12-18 2015-05-05 Qualcomm Incorporated Low-power wireless diversity receiver with multiple receive paths
JP4484666B2 (ja) * 2004-10-28 2010-06-16 アルパイン株式会社 無線放送受信機
US9450665B2 (en) * 2005-10-19 2016-09-20 Qualcomm Incorporated Diversity receiver for wireless communication
US7706768B2 (en) * 2006-08-02 2010-04-27 Intel Corporation Diversity switching
US7873125B2 (en) * 2006-11-30 2011-01-18 Broadcom Corporation Method and system for sliding window phase estimator for WCDMA automatic frequency correction
US7809043B2 (en) * 2006-11-30 2010-10-05 Broadcom Corporation Method and system for a flexible automatic frequency control (AFC) design supporting transmit diversity
US9178669B2 (en) 2011-05-17 2015-11-03 Qualcomm Incorporated Non-adjacent carrier aggregation architecture
US9252827B2 (en) 2011-06-27 2016-02-02 Qualcomm Incorporated Signal splitting carrier aggregation receiver architecture
US9154179B2 (en) 2011-06-29 2015-10-06 Qualcomm Incorporated Receiver with bypass mode for improved sensitivity
US12081243B2 (en) 2011-08-16 2024-09-03 Qualcomm Incorporated Low noise amplifiers with combined outputs
US8774334B2 (en) 2011-11-09 2014-07-08 Qualcomm Incorporated Dynamic receiver switching
US9172402B2 (en) 2012-03-02 2015-10-27 Qualcomm Incorporated Multiple-input and multiple-output carrier aggregation receiver reuse architecture
US9362958B2 (en) 2012-03-02 2016-06-07 Qualcomm Incorporated Single chip signal splitting carrier aggregation receiver architecture
US9118439B2 (en) 2012-04-06 2015-08-25 Qualcomm Incorporated Receiver for imbalanced carriers
US9154356B2 (en) 2012-05-25 2015-10-06 Qualcomm Incorporated Low noise amplifiers for carrier aggregation
US9867194B2 (en) 2012-06-12 2018-01-09 Qualcomm Incorporated Dynamic UE scheduling with shared antenna and carrier aggregation
US9300420B2 (en) 2012-09-11 2016-03-29 Qualcomm Incorporated Carrier aggregation receiver architecture
US9543903B2 (en) 2012-10-22 2017-01-10 Qualcomm Incorporated Amplifiers with noise splitting
JP5766369B2 (ja) * 2012-12-07 2015-08-19 三菱電機株式会社 ダイバーシチ受信装置及びダイバーシチ受信方法
US8995591B2 (en) 2013-03-14 2015-03-31 Qualcomm, Incorporated Reusing a single-chip carrier aggregation receiver to support non-cellular diversity
US9195860B1 (en) * 2014-01-10 2015-11-24 Seagate Technology Llc Adaptively combining waveforms
US10177722B2 (en) 2016-01-12 2019-01-08 Qualcomm Incorporated Carrier aggregation low-noise amplifier with tunable integrated power splitter
EP3197056B1 (en) * 2016-01-25 2018-08-01 Nxp B.V. Phase locked loop circuits

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU533241A1 (ru) * 1973-03-16 1987-11-07 Предприятие П/Я А-7306 Устройство квазикогерентного приема разнесенных сигналов
IT1063831B (it) * 1975-06-23 1985-02-18 Nippon Electric Co Impianto ricevente a diversita spaziale
US4186347A (en) * 1978-10-31 1980-01-29 Nasa Radio frequency arraying method for receivers
US4326294A (en) * 1979-02-13 1982-04-20 Nippon Telegraph & Telephone Public Corporation Space diversity reception system having compensation means of multipath effect
US4519096A (en) * 1979-10-15 1985-05-21 Motorola, Inc. Large dynamic range multiplier for a maximal-ratio diversity combiner
US4641141A (en) * 1984-05-02 1987-02-03 The United States Of America As Represented By The Secretary Of The Air Force Coherent dual automatic gain control system
DE3510580A1 (de) * 1985-03-23 1986-09-25 Blaupunkt-Werke Gmbh, 3200 Hildesheim Verfahren und schaltungsanordnung zur verbesserung des empfangs von radiowellen
JPS62143527A (ja) * 1985-12-18 1987-06-26 Nec Corp 同相合成方式
US4752969A (en) * 1986-01-16 1988-06-21 Kenneth Rilling Anti-multipath signal processor
DE3634439A1 (de) * 1986-10-09 1988-04-14 Blaupunkt Werke Gmbh Verfahren und schaltungsanordnung zum empfang von radiowellen
SE455981B (sv) * 1986-12-15 1988-08-22 Ericsson Telefon Ab L M Diversitetskombinator
JP2562623B2 (ja) * 1987-10-28 1996-12-11 国際電信電話株式会社 ベースバンド合成法による偏波ダイバーシティ光受信方式
DE3741698A1 (de) * 1987-12-09 1989-06-29 Blaupunkt Werke Gmbh Empfaenger fuer radiowellen mit mehreren antennen
JPH063512B2 (ja) * 1988-02-19 1994-01-12 富士通株式会社 コヒーレント光通信用偏波ダイバーシティ光受信装置
JPH03213021A (ja) * 1990-01-18 1991-09-18 Fujitsu Ltd Ｓｄ受信装置

Also Published As

Publication number Publication date
CA2080171A1 (en) 1993-04-10
MX9205755A (es) 1993-04-01
SE9202897D0 (sv) 1992-10-05
BR9203907A (pt) 1993-05-04
DE4233965C2 (de) 2003-04-24
US5321850A (en) 1994-06-14
GB2260454B (en) 1995-06-28
TW199949B (enExample) 1993-02-11
CA2080171C (en) 2001-12-18
DE4233965A1 (de) 1993-04-15
GB2260454A (en) 1993-04-14
JPH05218918A (ja) 1993-08-27
GB9221129D0 (en) 1992-11-18
SE9202897L (sv) 1993-04-10
JP3295460B2 (ja) 2002-06-24

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