SYSTEM AND METHOD FOR PROVIDING INDEPENDENT POLARIZATION CONTROL

• US 20110300792A1
• Filed: 04/08/2011
• Published: 12/08/2011
• Est. Priority Date: 04/09/2010
• Status: Active Grant

• Current Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Original Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Inventors: Williams, Charles, Wymant, Nicholas
• Granted Patent: US 8,494,465 B2
• Time in Patent Office: Days
• US Class Current: 455/39
• CPC Class Codes: H01Q 21/245 provided with means for varying the polarisation polarising devices H01Q15/24; tracking by comparing linear polarisation compounds G01S3/146; reducing depolarisation effects H04B7/00; polarisation diversity H04B7/10

Abstract

A system for providing independent polarization control in a radio communication system comprises a set of common antennas and a plurality of transmitters for supplying signals to said set of common antennas Said set of common antennas is used for transmitting signals supplied by the transmitters. Said set of common antennas is used to provide elliptical polarization transmission of said signals. The system furthermore comprises a combiner for each combination of a first transmitter of said plurality of transmitters and an antenna of said not of common antennas, and an adjusting element allowing for controlling the polarization of the signal provided by said first transmitter.

Claims

1. System for providing independent polarization control in a radio communication system, the system comprising

a set of common antennas

a plurality of Transmitters for supplying signals to said se of common antennas,

wherein said set of common antennas is used for transmitting said signals, and wherein said set of common antennas is used to provide elliptical polarization transmission of said signals,

a combiner for each combination of a first transmitter of said plurality of Transmitters and an antenna of said set of common antennas, and

an adjusting element allowing for controlling the polarization of the signal provided by said first Transmitter.

2. System according to claim 1, wherein said adjusting element allows for controlling the polarization via controlling a power ratio supplied to each of said combiner.

3. System according to claim 1 or 2, wherein said adjusting element allows for controlling the polarization via controlling a phase shift supplied to one of said combiners.

4. System according to claim 1, wherein the polarization is controlled in such a way that the polarization of at least one signal transmitted by the set of common antennas provides an elliptical polarization.

5. System according to claim 1 or 4, wherein the polarization is controlled in such a way that the polarization of at least one signal transmitted by the set of common antennas provides a horizontal component and a vertical component, wherein the power of said signal in the horizontal component is about 66% and the power of said signal in the vertical component is about 33%.

6. Method for providing independent polarization control in a radio communication system, the system comprising a plurality of Transmitters for supplying signals to a set of common antennas, wherein said set of common antennas is used for transmitting said signals, and wherein said set of common antennas is used to provide elliptical polarization transmission of said signals, comprising the steps of:

Providing a combiner for each combination of a first Transmitter of said plurality of Transmitters and an antenna of said set of common antennas,

Providing an adjusting element allowing for controlling the polarization of the signal provided by said first Transmitter.

7. Method according to claim 6, further comprising the step of controlling a power ratio supplied to each of said combiner by said adjusting element.

8. Method according to claim 6 or 7, further comprising the step of controlling the polarization via controlling a phase shift supplied to one of said combiners by said adjusting element.