Title:
SYSTEM AND METHOD FOR EVALUATION OF A DIRECTION TO A MOBILE UNIT IN A CELLULAR RADIO NET
Document Type and Number:
WIPO Patent Application WO1999054957
Kind Code:
A3
Abstract:
A method and a system for evaluating a direction between a first station and a mobile station in a cellular radio net, for instance the GSM system, are based on the first station having an antenna arrangement which includes at least two antennas that have different directional characteristics and directions and each transmit an identifiable signal. A characteristic is established with respect to the difference between the signals from the two antennas in different directions form the first station. The two signals are sensed in the mobile station and the difference between the signals evaluated. The aforesaid direction is evaluated by the characteristic on the basis of the signal difference in the mobile station.
Inventors:
SICKING MAGNUS (SE)
Application Number:
PCT/SE1999/000642
Publication Date:
January 06, 2000
Filing Date:
April 21, 1999
Export Citation:
Assignee:
UNWIRE AB (SE)
SICKING MAGNUS (SE)
SICKING MAGNUS (SE)
International Classes:
H01Q1/24; (IPC1-7): G01S1/14
Domestic Patent References:
| WO1994027265A1 | 1994-11-24 |
Foreign References:
| GB2314716A | 1998-01-07 | |||
| US5508707A | 1996-04-16 | |||
| US4881082A | 1989-11-14 |
Other References:
DRABOWITCH S: "FIELD RADIATED FROM AN ANTENNA", MODERN ANTENNAS, MICROWAVE AND RF TECHNOLOGY, XX, XX, 1 January 1998 (1998-01-01), XX, pages 59 - 63, XP002921101
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