WO2002015412A3 - Signal measurement in radio communications systems - Google Patents
Signal measurement in radio communications systems Download PDFInfo
- 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
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
-
- 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
- H04B7/12—Frequency 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.
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)
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)
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)
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 |
-
2000
- 2000-08-14 GB GB0019993A patent/GB0019993D0/en not_active Ceased
-
2001
- 2001-08-14 GB GB0119839A patent/GB2369967A/en not_active Withdrawn
- 2001-08-14 WO PCT/GB2001/003638 patent/WO2002015412A2/en active Application Filing
Patent Citations (4)
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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