Title:
MOBILE STATION WITH TWO TRANSCEIVERS AND INTER-FREQUENCY METHOD
Document Type and Number:
WIPO Patent Application WO2001047126
Kind Code:
A3
Abstract:
A mobile station for a wireless cellular or PCS system has two tunable transceivers, each having its own antenna, which can be tuned independently of each other to operating frequencies of base stations of the system. The two-transceiver arrangement enables the performance of an inter-frequency soft handover method, without using a compressed mode, and an inter-frequency signal quality measurement method without using a slotted mode. Because the two antennas are spaced apart in distance, orientation or polarization, baseband signals of the transceivers are combined when the transceivers are tuned to the same operating frequency, to exploit an antenna diversity effect. Both inter-frequency methods are such that just prior to the commencement of the method, both transceivers are tuned to the same current operating frequency and are in communication with a current base station of the system, and at an intermediate stage in the method, one of the transceivers is tuned to another operating frequency while the other transceiver remains in communication with the current base station at the current operating frequency.
Inventors:
HENON ALEXANDRE
Application Number:
PCT/EP2000/012381
Publication Date:
May 02, 2002
Filing Date:
December 08, 2000
Export Citation:
Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
International Classes:
H04B1/40; H04B7/08; H04B7/12; H04B7/26; H04W36/12; H04B7/04; H04B7/06; H04B7/10; H04W36/18; (IPC1-7): H04B7/12; H04B17/00; H04Q7/38
Domestic Patent References:
| WO1998054849A2 | 1998-12-03 | |||
| WO1999062203A2 | 1999-12-02 |
Foreign References:
| US5809405A | 1998-09-15 |
Other References:
OJANPERA T ET AL: "FRAMES multiple access for UTMS", IEE COLLOQUIUM ON CDMA TECHNIQUES AND APPLICATIONS FOR THIRD GENERATION MOBILE SYSTEMS (REF. NO.1997/129), IEE COLLOQUIUM ON CDMA TECHNIQUES AND APPLICATIONS FOR THIRD GENERATION MOBILE SYSTEMS (REF. NO.1997/129), LONDON, UK, 19 MAY 1997, 1997, London, UK, IEE, UK, pages 7/1 - 8, XP002165099
OJANPERA T ET AL: "Design of a 3rd generation multirate CDMA system with multiuser detection, MUD-CDMA", 1996 IEEE 4TH INTERNATIONAL SYMPOSIUM ON SPREAD SPECTRUM TECHNIQUES AND APPLICATIONS PROCEEDINGS. TECHNICAL PROGRAM. (CAT. NO.96TH8210), PROCEEDINGS OF ISSSTA'95 INTERNATIONAL SYMPOSIUM ON SPREAD SPECTRUM TECHNIQUES AND APPLICATIONS, MAINZ, GERMANY,, 1996, New York, NY, USA, IEEE, USA, pages 334 - 338 vol.1, XP002165100, ISBN: 0-7803-3567-8
OJANPERA T ET AL: "Design of a 3rd generation multirate CDMA system with multiuser detection, MUD-CDMA", 1996 IEEE 4TH INTERNATIONAL SYMPOSIUM ON SPREAD SPECTRUM TECHNIQUES AND APPLICATIONS PROCEEDINGS. TECHNICAL PROGRAM. (CAT. NO.96TH8210), PROCEEDINGS OF ISSSTA'95 INTERNATIONAL SYMPOSIUM ON SPREAD SPECTRUM TECHNIQUES AND APPLICATIONS, MAINZ, GERMANY,, 1996, New York, NY, USA, IEEE, USA, pages 334 - 338 vol.1, XP002165100, ISBN: 0-7803-3567-8
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