MX9805134A - Impairment determination for a diversity antenna selection process. - Google Patents

Impairment determination for a diversity antenna selection process.

Info

Publication number
MX9805134A
MX9805134A MX9805134A MX9805134A MX9805134A MX 9805134 A MX9805134 A MX 9805134A MX 9805134 A MX9805134 A MX 9805134A MX 9805134 A MX9805134 A MX 9805134A MX 9805134 A MX9805134 A MX 9805134A
Authority
MX
Mexico
Prior art keywords
quality
tests
selection process
impairment
antenna
Prior art date
Application number
MX9805134A
Other languages
Spanish (es)
Inventor
Stephen Ross Todd
Original Assignee
Northern Telecom Ltd
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 CA2188845A external-priority patent/CA2188845A1/en
Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of MX9805134A publication Critical patent/MX9805134A/en

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
    • H04B7/0802—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 antenna selection
    • H04B7/0805—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 antenna selection with single receiver and antenna switching
    • H04B7/0808—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 antenna selection with single receiver and antenna switching comparing all antennas before reception
    • H04B7/0811—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 antenna selection with single receiver and antenna switching comparing all antennas before reception during preamble or gap period
    • 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
    • H04B7/0802—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 antenna selection
    • H04B7/0805—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 antenna selection with single receiver and antenna switching
    • H04B7/0808—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 antenna selection with single receiver and antenna switching comparing all antennas before reception
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • 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
    • H04B7/0802—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 antenna selection
    • H04B7/0825—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 antenna selection with main and with auxiliary or diversity antennas

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

A diversity selection process which tests to determine whether poor reception is caused by co-channel interference or multipath fading is disclosed. The impairment is determined by first testing the quality over several frames. Unless the quality is poor over these several frames, the system tests for multipath fading by selecting the antenna with the greater signal strength, provided no hold condition exists. However, if poor quality has been present over the several frame period, the system selects the other antenna if its RSSI is greater. However, the system also tests the RSSI received on the current antenna and determines the impairment was co-channel interference if the signal of quality was sufficiently high. In which case a hold condition is set for a number of frames to prevent excessive switching.
MX9805134A 1996-10-25 1998-06-24 Impairment determination for a diversity antenna selection process. MX9805134A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA2188845A CA2188845A1 (en) 1996-10-25 1996-10-25 Diversity Antenna Selection
US08/772,669 US6118773A (en) 1996-10-25 1996-12-20 Impairment determination for a diversity antenna selection process

Publications (1)

Publication Number Publication Date
MX9805134A true MX9805134A (en) 1998-10-31

Family

ID=25678770

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9805134A MX9805134A (en) 1996-10-25 1998-06-24 Impairment determination for a diversity antenna selection process.

Country Status (4)

Country Link
EP (1) EP0870371A1 (en)
CN (1) CN1211359A (en)
MX (1) MX9805134A (en)
WO (1) WO1998019401A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI982763A (en) * 1998-12-21 2000-06-22 Nokia Networks Oy Procedure for data communication and radio systems
JP2000196512A (en) * 1998-12-25 2000-07-14 Nec Mobile Commun Ltd Diversity control circuit for mobile communication unit and diversity control method
US7263147B2 (en) * 2003-10-14 2007-08-28 Intel Corporation Low bit error rate antenna switch for wireless communications
JP4462910B2 (en) * 2003-12-04 2010-05-12 株式会社バッファロー Wireless LAN transceiver
CN104506221B (en) * 2014-12-12 2018-11-09 福建星网锐捷网络有限公司 Method of controlling antenna and antenna

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2614157B1 (en) * 1987-04-14 1994-04-08 Thomson Csf METHOD FOR AUTOMATIC SELECTION OF A DIRECTIVE RECEIVING ANTENNA AMONG A PLURALITY OF RECEIVING ANTENNAS
EP0989697B1 (en) * 1993-09-30 2004-06-30 Skyworks Solutions, Inc. Multiple antenna home base for digital cordless telephones
US5530926A (en) * 1993-10-04 1996-06-25 Motorola, Inc. Method for operating a switched diversity RF receiver

Also Published As

Publication number Publication date
WO1998019401A1 (en) 1998-05-07
CN1211359A (en) 1999-03-17
EP0870371A1 (en) 1998-10-14

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