Antenna system having adaptive polarization control

• US 8,779,976 B2
• Filed: 11/23/2011
• Issued: 07/15/2014
• Est. Priority Date: 12/28/2010
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute, SK Telecom Co., Ltd.
• Original Assignee: Electronics and Telecommunications Research Institute, SK Telecom Co., Ltd.
• Inventors: Eom, Soon-Young, Jung, Young-Bae, Jeon, Soon-Ik, Choi, Jae-Ick, Shin, Yong-Sik
• Primary Examiner(s): LIU, HARRY K
• Application Number:
  US13/303,177
• Publication Number:
  US 20120162008A1
• Time in Patent Office: 965 Days
• Field of Search: 342/361
• US Class Current: 342/361
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• 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
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity

Abstract

An antenna system includes: an orthogonal multi-polarization antenna configured to output independent double orthogonal polarizations through two independent input/output terminals; an antenna main control unit configured to perform a polarization control algorithm, collect and analyze information for polarization control, and provide polarization control information; and a polarization control unit configured to perform independent amplitude and phase control with regard to a pair of independent channels connected to the orthogonal multi-polarization antenna, based on the polarization control information received from the antenna main control unit, so that various polarizations are formed.

Claims

1. An antenna system comprising:

an orthogonal multi-polarization antenna configured to output independent double orthogonal polarizations through two independent input/output terminals connected to respective orthogonally intersecting antenna elements;

an antenna main control unit configured to perform a polarization control algorithm, collect and analyze information for polarization control, and provide polarization control information; and

a polarization control unit configured to perform independent amplitude and phase control with regard to a pair of independent channels connected to the orthogonal multi-polarization antenna, based on the polarization control information received from the antenna main control unit, so that various polarizations are formed.

2. The antenna system of claim 1, wherein the antenna main control unit is configured to generate the polarization control information by collecting and analyzing radio communication traffic density, peripheral environment information, channel modeling information, and currently used polarization information.

3. The antenna system of claim 1, wherein the polarization control unit has double channels so as to connect to the orthogonal multi-polarization antenna and independently control amplitude and phase of signals.

4. The antenna system of claim 1, wherein the polarization control unit is implemented inside a baseband signal processing unit, and the baseband signal processing unit is configured to perform control so as to generate antenna beam patterns and polarizations optimized for respective users through signal amplitude and phase control based on the polarization control information from the antenna main control unit.

5. The antenna system of claim 1, wherein the polarization control unit is implemented inside a digital conversion and signal processing unit, and the digital conversion and signal processing unit is configured to perform control so as to generate antenna beam patterns and polarizations optimized for respective sector group users based on the polarization control information from the antenna main control unit.

6. The antenna system of claim 1, wherein the polarization control unit is implemented inside a front-end transmission/reception active unit, which is an analog part, and the front-end transmission/reception active unit is configured to perform control so as to generate antenna beam patterns and polarizations optimized for respective sector group users based on the polarization control information from the antenna main control unit.

7. The antenna system of claim 6, wherein amplitude and phase control for polarization control is performed by a RF phase shifter and a RF power attenuator inside the front-end transmission/reception active unit.

8. The antenna system of claim 1, wherein the orthogonal multi-polarization antenna comprises an orthogonal multi-polarization antenna device having two independent radiators orthogonal to each other so that, among respective input/output terminals of the radiators, two different pieces of independent data are combined and inputted to a first input terminal, and two different pieces of independent data are combined and inputted to a second input terminal.

9. An antenna system comprising:

an orthogonal multi-polarization antenna configured to output independent double orthogonal polarizations through two independent input/output terminals;

an antenna main control unit configured to perform a polarization control algorithm, collect and analyze information for polarization control, and provide polarization control information; and

a polarization control unit configured to perform independent amplitude and phase control with regard to a pair of independent channels connected to the orthogonal multi-polarization antenna, based on the polarization control information received from the antenna main control unit, so that various polarizations are formed;

wherein the polarization control unit is implemented inside a baseband signal processing unit, and the baseband signal processing unit is configured to perform control so as to generate antenna beam patterns and polarizations optimized for respective users through signal amplitude and phase control based on the polarization control information from the antenna main control unit.