METHOD AND ARRANGEMENT FOR POLARIZATION CONTROL IN A COMMUNICATION SYSTEM
First Claim
1. A method of controlling the polarization state of signals to be transmitted from a MIMO capable radio base station node to a plurality of user equipment, said radio base station node comprising a precoder unit connecting a first and a second virtual antenna port to a respective first and second transmit antenna port, the method comprising:
- controlling a relative phase between transmitted signals from said first transmit antenna port and said second transmit antenna port to provide a predetermined pair of orthogonal polarization states for signals transmitted on said first and said second virtual antenna ports; and
interchanging the polarization states of said first and second virtual antenna ports, to provide transmitted polarized signals with alternating polarization states.
1 Assignment
0 Petitions
Accused Products
Abstract
Controlling the polarization state of signals to be transmitted from a MIMO capable radio base station node to a plurality of user equipment, which radio base station node comprises a precoder unit connecting a first and a second virtual antenna port to a respective first and second transmit antenna port, by the steps of controlling (S10) a relative phase between transmitted signals from the first and second transmit antenna port to provide a predetermined pair of orthogonal polarization states for signals transmitted on the first and second virtual antenna ports, and interchanging (S20) the polarization states of the first and second virtual antenna ports, to provide transmitted polarized signals with alternating polarization states.
-
Citations
20 Claims
-
1. A method of controlling the polarization state of signals to be transmitted from a MIMO capable radio base station node to a plurality of user equipment, said radio base station node comprising a precoder unit connecting a first and a second virtual antenna port to a respective first and second transmit antenna port, the method comprising:
-
controlling a relative phase between transmitted signals from said first transmit antenna port and said second transmit antenna port to provide a predetermined pair of orthogonal polarization states for signals transmitted on said first and said second virtual antenna ports; and interchanging the polarization states of said first and second virtual antenna ports, to provide transmitted polarized signals with alternating polarization states. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 19, 20)
-
-
16. A MIMO capable radio base station node, said radio base station node comprising a precoder unit connecting a first and a second virtual antenna port to a respective first and a second transmit antenna port for transmitting signals to a plurality of user equipment, the base station node comprising:
-
a controller configured to control a relative phase between transmitted signals from said first transmit antenna port and said second transmit antenna port to provide a predetermined pair of orthogonal polarization states for signals transmitted on said first and said second virtual antenna ports; and a polarization switch configured to interchange the polarization states of said first and second antenna ports, to provide transmitted polarized signals with alternating polarization states. - View Dependent Claims (17, 18)
-
Specification