WO2002015412A3 - Signal measurement in radio communications systems - Google Patents

Signal measurement in radio communications systems Download PDF

Info

Publication number
WO2002015412A3
WO2002015412A3 PCT/GB2001/003638 GB0103638W WO0215412A3 WO 2002015412 A3 WO2002015412 A3 WO 2002015412A3 GB 0103638 W GB0103638 W GB 0103638W WO 0215412 A3 WO0215412 A3 WO 0215412A3
Authority
WO
WIPO (PCT)
Prior art keywords
frequency
mobile unit
antenna branch
diverse
antenna
Prior art date
Application number
PCT/GB2001/003638
Other languages
French (fr)
Other versions
WO2002015412A2 (en
Inventor
Martin Popple
Original Assignee
Simoco Int Ltd
Martin Popple
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 Simoco Int Ltd, Martin Popple filed Critical Simoco Int Ltd
Publication of WO2002015412A2 publication Critical patent/WO2002015412A2/en
Publication of WO2002015412A3 publication Critical patent/WO2002015412A3/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802Diversity 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
    • H04B7/0805Diversity 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/12Frequency diversity

Abstract

A mobile unit of a digital mobile communications system includes a diverse antenna receiver arrangement comprising a main antenna branch (1), a second diverse antenna branch (2), and a diverse antenna switch (3) for switching between the two antenna branches. A channel acquisition controller (11) runs a channel acquisition process which causes the mobile unit to scan plural frequencies of the radio system in turn and take successive signal samples on each frequency, in which scan two signal samples are taken on each carrier frequency, one on the main antenna branch (1), and then one from the diverse antenna branch (2), before the receiver retunes to the next frequency to be sampled. After all the frequencies have been dual-sampled in this way, the process is redone a number of times and after a selected overall sampling period the mean signal strength of each frequency is determined from the samples taken. The mobile unit then, for example, selects the frequency with the greatest signal strength as the frequency (radio channel) to use.
PCT/GB2001/003638 2000-08-14 2001-08-14 Signal measurement in radio communications systems WO2002015412A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0019993A GB0019993D0 (en) 2000-08-14 2000-08-14 Signal measurement in radio communications systems
GB0019993.5 2000-08-14

Publications (2)

Publication Number Publication Date
WO2002015412A2 WO2002015412A2 (en) 2002-02-21
WO2002015412A3 true WO2002015412A3 (en) 2002-05-10

Family

ID=9897585

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/003638 WO2002015412A2 (en) 2000-08-14 2001-08-14 Signal measurement in radio communications systems

Country Status (2)

Country Link
GB (2) GB0019993D0 (en)
WO (1) WO2002015412A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1566899B1 (en) 2004-02-23 2016-05-11 Harman Becker Automotive Systems GmbH Multipath compensation for diversity signal receivers
US8874041B2 (en) 2011-10-03 2014-10-28 Apple Inc. Electronic device with service acquisition antenna switching
CN111010206A (en) * 2018-10-08 2020-04-14 中兴通讯股份有限公司 Antenna tuning method, antenna tuning device, mobile terminal and computer readable storage medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3827310A1 (en) * 1987-08-12 1989-03-02 Pioneer Electronic Corp BROADCASTING DATA SYSTEM (RDS) RECEIVER AND METHOD OF CONTROLLING SUCH A RECEIVER
US5159707A (en) * 1990-04-12 1992-10-27 Pioneer Electronic Corporation Diversity receiver
US6002672A (en) * 1996-10-25 1999-12-14 Nortel Networks Corporation Diversity antenna selection
US6006113A (en) * 1994-12-01 1999-12-21 Radio Frequency Systems, Inc. Radio signal scanning and targeting system for use in land mobile radio base sites

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5459873A (en) * 1993-08-21 1995-10-17 Motorola, Inc. Method and communication system for improved channel scanning and link establishment determinations

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3827310A1 (en) * 1987-08-12 1989-03-02 Pioneer Electronic Corp BROADCASTING DATA SYSTEM (RDS) RECEIVER AND METHOD OF CONTROLLING SUCH A RECEIVER
US5159707A (en) * 1990-04-12 1992-10-27 Pioneer Electronic Corporation Diversity receiver
US6006113A (en) * 1994-12-01 1999-12-21 Radio Frequency Systems, Inc. Radio signal scanning and targeting system for use in land mobile radio base sites
US6002672A (en) * 1996-10-25 1999-12-14 Nortel Networks Corporation Diversity antenna selection

Also Published As

Publication number Publication date
GB2369967A (en) 2002-06-12
WO2002015412A2 (en) 2002-02-21
GB0019993D0 (en) 2000-10-04
GB0119839D0 (en) 2001-10-10

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