TW362311B - System for improving the quality of a received radio signal - Google Patents

System for improving the quality of a received radio signal

Info

Publication number
TW362311B
TW362311B TW086118600A TW86118600A TW362311B TW 362311 B TW362311 B TW 362311B TW 086118600 A TW086118600 A TW 086118600A TW 86118600 A TW86118600 A TW 86118600A TW 362311 B TW362311 B TW 362311B
Authority
TW
Taiwan
Prior art keywords
signal
signals
antennas
transmits
reduce
Prior art date
Application number
TW086118600A
Other languages
English (en)
Chinese (zh)
Inventor
Sandeep Chennakeshu
Gregory E Bottomley
Paul W Dent
Original Assignee
Ericsson 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
Application filed by Ericsson Inc filed Critical Ericsson Inc
Application granted granted Critical
Publication of TW362311B publication Critical patent/TW362311B/zh

Links

Classifications

    • 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
    • H04B7/0891—Space-time diversity
    • H04B7/0894—Space-time diversity using different delays between antennas
    • 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
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • 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
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/715—Interference-related aspects
    • 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
    • H04B7/0667—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 delayed versions of same signal
    • H04B7/0671—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 delayed versions of same signal using different delays between antennas
    • 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
    • H04B7/084—Equal gain combining, only phase adjustments
    • 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
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
    • H04B1/126—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means having multiple inputs, e.g. auxiliary antenna for receiving interfering signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)
TW086118600A 1996-12-17 1997-12-10 System for improving the quality of a received radio signal TW362311B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/768,319 US6034987A (en) 1996-12-17 1996-12-17 System for improving the quality of a received radio signal

Publications (1)

Publication Number Publication Date
TW362311B true TW362311B (en) 1999-06-21

Family

ID=25082158

Family Applications (1)

Application Number Title Priority Date Filing Date
TW086118600A TW362311B (en) 1996-12-17 1997-12-10 System for improving the quality of a received radio signal

Country Status (10)

Country Link
US (2) US6034987A (enExample)
EP (1) EP0947058B1 (enExample)
JP (1) JP4104023B2 (enExample)
CN (2) CN101056134A (enExample)
AU (1) AU5521098A (enExample)
BR (1) BR9713943A (enExample)
CA (1) CA2275283C (enExample)
DE (1) DE69721048T2 (enExample)
TW (1) TW362311B (enExample)
WO (1) WO1998027663A2 (enExample)

Families Citing this family (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6006075A (en) * 1996-06-18 1999-12-21 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for transmitting communication signals using transmission space diversity and frequency diversity
JPH10257005A (ja) * 1997-03-12 1998-09-25 Sony Corp 通信方法及び送信装置並びに受信装置
US6185258B1 (en) 1997-09-16 2001-02-06 At&T Wireless Services Inc. Transmitter diversity technique for wireless communications
EP0960487B1 (en) 1997-10-31 2006-03-08 AT&T Wireless Services, Inc. Maximum likelihood detection of concatenated space-time codes for wireless applications with transmitter diversity
US6188736B1 (en) * 1997-12-23 2001-02-13 At&T Wireless Svcs. Inc. Near-optimal low-complexity decoding of space-time codes for fixed wireless applications
SE522587C2 (sv) * 1998-02-16 2004-02-24 Ericsson Telefon Ab L M Förfarande och mottagaranordning för mottagning av upprepade skurar i ett radiokommunikationssystem
US6459740B1 (en) * 1998-09-17 2002-10-01 At&T Wireless Services, Inc. Maximum ratio transmission
EP1073214B1 (en) * 1999-02-16 2008-12-17 Mitsubishi Denki Kabushiki Kaisha Radio communication system, transmitter and receiver
US6377609B1 (en) * 1999-03-05 2002-04-23 Neptune Technology Group Inc. Spread spectrum frequency hopping system and method
DE19931236C2 (de) * 1999-07-07 2002-05-29 Siemens Ag Verfahren zur Zuweisung von Übertragungskapazität zu Verbindungen in einem Funk-Kommunikationssystem
US6693971B1 (en) * 2000-02-29 2004-02-17 Bae Systems Information And Electronic Systems Integration Inc. Wideband co-site interference reduction apparatus
JP3331595B2 (ja) * 2000-06-05 2002-10-07 日東紡績株式会社 室内環境設計システム、室内環境評価システム、室内環境設計方法及び室内環境評価方法
AU2001270832A1 (en) * 2000-07-14 2002-01-30 Ip.Access Ltd. Cellular radio telecommunication system
US6694147B1 (en) * 2000-09-15 2004-02-17 Flarion Technologies, Inc. Methods and apparatus for transmitting information between a basestation and multiple mobile stations
US7339955B2 (en) * 2000-09-25 2008-03-04 Pulse-Link, Inc. TDMA communication method and apparatus using cyclic spreading codes
US7031371B1 (en) * 2000-09-25 2006-04-18 Lakkis Ismail A CDMA/TDMA communication method and apparatus for wireless communication using cyclic spreading codes
US6983243B1 (en) * 2000-10-27 2006-01-03 Lucent Technologies Inc. Methods and apparatus for wireless transmission using multiple description coding
US6947748B2 (en) 2000-12-15 2005-09-20 Adaptix, Inc. OFDMA with adaptive subcarrier-cluster configuration and selective loading
US20050201473A1 (en) * 2001-12-06 2005-09-15 Ismail Lakkis Systems and methods for receiving data in a wireless communication network
US7406647B2 (en) 2001-12-06 2008-07-29 Pulse-Link, Inc. Systems and methods for forward error correction in a wireless communication network
US7257156B2 (en) * 2001-12-06 2007-08-14 Pulse˜Link, Inc. Systems and methods for equalization of received signals in a wireless communication network
US20050152483A1 (en) * 2001-12-06 2005-07-14 Ismail Lakkis Systems and methods for implementing path diversity in a wireless communication network
US7450637B2 (en) * 2001-12-06 2008-11-11 Pulse-Link, Inc. Ultra-wideband communication apparatus and methods
US7391815B2 (en) * 2001-12-06 2008-06-24 Pulse-Link, Inc. Systems and methods to recover bandwidth in a communication system
US7403576B2 (en) 2001-12-06 2008-07-22 Pulse-Link, Inc. Systems and methods for receiving data in a wireless communication network
US7483483B2 (en) * 2001-12-06 2009-01-27 Pulse-Link, Inc. Ultra-wideband communication apparatus and methods
US20050053121A1 (en) * 2001-12-06 2005-03-10 Ismail Lakkis Ultra-wideband communication apparatus and methods
US7349439B2 (en) * 2001-12-06 2008-03-25 Pulse-Link, Inc. Ultra-wideband communication systems and methods
US7289494B2 (en) * 2001-12-06 2007-10-30 Pulse-Link, Inc. Systems and methods for wireless communication over a wide bandwidth channel using a plurality of sub-channels
US20050058180A1 (en) * 2001-12-06 2005-03-17 Ismail Lakkis Ultra-wideband communication apparatus and methods
US7317756B2 (en) * 2001-12-06 2008-01-08 Pulse-Link, Inc. Ultra-wideband communication apparatus and methods
US8045935B2 (en) * 2001-12-06 2011-10-25 Pulse-Link, Inc. High data rate transmitter and receiver
JP2004048126A (ja) * 2002-07-09 2004-02-12 Hitachi Ltd 無線通信制限装置および無線通信中継局および無線通信基地局
US7336694B2 (en) * 2003-10-10 2008-02-26 Sbc Knowledge Ventures, L.P. Delay-induced scattering with phase randomization and partitioned frequency hopping
GB2408898B (en) * 2003-12-02 2006-08-16 Toshiba Res Europ Ltd Improved communications apparatus and methods
US7327249B1 (en) 2004-06-24 2008-02-05 Wayne-Dalton Corp. Barrier operator system having multiple frequency receivers
US7573851B2 (en) 2004-12-07 2009-08-11 Adaptix, Inc. Method and system for switching antenna and channel assignments in broadband wireless networks
US7640040B2 (en) * 2005-08-22 2009-12-29 Kyocera Corporation Systems and methods for tuning an antenna configuration in a mobile communication device
WO2007026882A1 (ja) * 2005-09-01 2007-03-08 Sharp Kabushiki Kaisha 無線送信機及び無線送信方法
WO2007052649A1 (ja) * 2005-10-31 2007-05-10 Sharp Kabushiki Kaisha 無線送信機、無線通信システム及び無線送信方法
EP2037592B1 (en) * 2005-10-31 2012-01-04 Sharp Kabushiki Kaisha Wireless receiver
CN102594422B (zh) * 2005-12-20 2014-12-03 华为技术有限公司 发送控制方法、基站装置以及移动站
JP4658146B2 (ja) * 2005-12-26 2011-03-23 シャープ株式会社 無線送信機及び無線送信方法
US7508188B2 (en) * 2006-05-31 2009-03-24 Broadcom Corporation On-chip current sensing methods and systems
WO2009093943A1 (en) * 2008-01-25 2009-07-30 Telefonaktiebolaget Lm Ericsson (Publ) A method to modify the frequency hopping scheme by extending the validity of the reference signals
US8077597B1 (en) 2008-03-06 2011-12-13 Rockwell Collins, Inc. Multi-dwell channel monitoring for coordinated frequency hopped systems
US8243100B2 (en) * 2008-06-26 2012-08-14 Qualcomm Incorporated System and method to perform fast rotation operations
US8160513B2 (en) * 2008-08-01 2012-04-17 Qualcomm Incorporated Methods and apparatus for implementing phase rotation at baseband frequency for transmit diversity
US8885596B2 (en) 2011-02-18 2014-11-11 Panasonic Intellectual Property Corporation Of America Method of signal generation and signal generating device
US8942299B2 (en) * 2012-02-27 2015-01-27 Qualcomm Incorporated Baseband beamforming
CN104579440B (zh) * 2014-11-24 2018-04-20 南京邮电大学 一种基于反向天线阵的方向调制信号的设计方法
EP3519851B1 (de) * 2016-09-30 2020-10-21 Fraunhofer Gesellschaft zur Förderung der angewandten Forschung E.V. Telegram splitting basierte lokalisierung
CN107959533B (zh) * 2016-10-17 2020-11-06 华为技术有限公司 一种无线设备及射频通道校准方法
CN108965183B (zh) * 2018-08-01 2020-12-01 南京邮电大学 基于优化目标函数的无线通信方向调制方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2189348B (en) * 1979-05-23 1988-04-20 Standard Telephones Cables Ltd Adaptive antenna arrays for frequency hopped systems
US5142534A (en) * 1990-10-17 1992-08-25 O'neill Communications, Inc. Wireless integrated voice-data communication system
DE69429715T2 (de) * 1993-10-13 2002-08-08 Ntt Docomo, Inc. Empfänger für spreizspektrumübertragung
US5572552A (en) * 1994-01-27 1996-11-05 Ericsson Ge Mobile Communications Inc. Method and system for demodulation of downlink CDMA signals
US5614914A (en) * 1994-09-06 1997-03-25 Interdigital Technology Corporation Wireless telephone distribution system with time and space diversity transmission for determining receiver location
JP2746190B2 (ja) * 1995-04-27 1998-04-28 住友電気工業株式会社 スペクトラム拡散通信装置
US5563610A (en) * 1995-06-08 1996-10-08 Metawave Communications Corporation Narrow beam antenna systems with angular diversity

Also Published As

Publication number Publication date
WO1998027663A3 (en) 1998-08-06
AU5521098A (en) 1998-07-15
CN100359821C (zh) 2008-01-02
JP4104023B2 (ja) 2008-06-18
CN101056134A (zh) 2007-10-17
CN1245600A (zh) 2000-02-23
WO1998027663A2 (en) 1998-06-25
BR9713943A (pt) 2000-03-21
CA2275283A1 (en) 1998-06-25
DE69721048T2 (de) 2004-04-08
US5991331A (en) 1999-11-23
EP0947058B1 (en) 2003-04-16
JP2001524277A (ja) 2001-11-27
DE69721048D1 (de) 2003-05-22
EP0947058A2 (en) 1999-10-06
CA2275283C (en) 2006-12-05
US6034987A (en) 2000-03-07

Similar Documents

Publication Publication Date Title
TW362311B (en) System for improving the quality of a received radio signal
TWI266549B (en) System and method for increasing cellular system capacity by the use of the same frequency and time slot for both uplink and downlink transmissions
EP0332290A3 (en) Equaliser for radio receiver
CA2199542A1 (en) Methods and Apparatus for High Data Rate Transmission in Narrow Band Mobile Radio Channels
WO2002023743A3 (en) Methods and apparatus for transmitting information between a basestation and multiple mobile stations
CA2109530A1 (en) Frequency diversity transmitter and receiver system
EP0975101A3 (en) Diversity receiver
EP0610030A3 (en) Method and apparatus for transmitter power control in a cellular radio system
WO2003043222A1 (en) Communication method and radio communication apparatus
CA2315489A1 (en) Radio communication apparatus and radio communication method
GB1510169A (en) Digital communications system with immunity to frequency selective fading
WO2000077938A3 (en) Receiving station with interference signal suppression
TW200507485A (en) Simultaneous transmission and reception in a multimode transceiver
CA2309721A1 (en) Diversity reception system
WO2002054101A8 (de) Radareinrichtung und verfahren zum unterdrücken von störungen einer radareinrichtung
CA2124882A1 (en) Interface Protocol Method and Apparatus for Use in a Frequency Hopping Radio System
CA2223358A1 (en) Spread-spectrum transmitter and receiver
US7359673B2 (en) UWB repeater with pulse delay and UWB communication system
CA1196963A (en) Military communications system
TW200610304A (en) Communication system, transmitter and receiver
GB548599A (en) Improvements in frequency modulation systems for radio communication
TW331685B (en) Digital information transfer to provide a method and an apparatus for multiple frequency, multiple channel digital information transfer through time slot allocation.
CA2285198A1 (en) Parallel transmission method
JPS55118241A (en) Telephone unit
JPS55161429A (en) Signal transmitting and receiving system