Method and System for Uplink Beamforming Calibration in a Multi-Antenna Wireless Communication System
First Claim
1. A method, comprising:
- in a wireless transceiver;
determining a transmit path phase difference between a first antenna and a second antenna in the wireless transceiver;
determining a receive path phase difference between the first and second antennas;
determining a wireless channel phase difference associated with the first and second antennas based on downlink radio frequency signals received by the first and second antennas from a base station antenna of a base station; and
transmitting uplink radio frequency signals via the first and second antennas to the base station based on a composite phase difference equal to a sum of the trans it path phase difference, the receive path phase difference and the wireless channel phase difference.
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Accused Products
Abstract
A wireless transceiver, comprising a transmitter, a receiver and a plurality of antennas, determines transmit phase relationship between at least two of antennas based on radio frequency (RF) signals received via the at least two antennas from one or more antennas of a base station. RF signals are transmitted via the at least two antennas utilizing the determined transmit phase relationship. The receiver is calibrated based on receiver performance determined from the received RF signals for subsequent reception of RF signals. The transmit phase relationship is dynamically adjusted based on the transmit RF measurements and the determined receiver performance. Transmit channel qualities are determined for each transmit antenna based on the transmit RF measurements and the dynamically adjusted transmit phase relationship. Transmit antennas are dynamically selected based on the adjusted transmit phase relationship, the characterized transmit channel qualities and the determined receiver performance for subsequent transmission to the base station.
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Citations
20 Claims
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1. A method, comprising:
in a wireless transceiver; determining a transmit path phase difference between a first antenna and a second antenna in the wireless transceiver; determining a receive path phase difference between the first and second antennas; determining a wireless channel phase difference associated with the first and second antennas based on downlink radio frequency signals received by the first and second antennas from a base station antenna of a base station; and transmitting uplink radio frequency signals via the first and second antennas to the base station based on a composite phase difference equal to a sum of the trans it path phase difference, the receive path phase difference and the wireless channel phase difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A wireless transceiver, comprising:
one or more circuits configured to; determine a transmit path phase difference between a first antenna and a second antenna in the wireless transceiver; determine a receive path phase difference between the first and second antennas; determine a wireless channel phase difference associated with the first and second antennas based on downlink radio frequency signals received by the first and second antennas from a base station antenna of a base station; and transmit uplink radio frequency signals via the first and second antennas to the base station based on a composite phase difference equal to a sum of the transmit path phase difference, the receive path phase difference and the wireless channel phase difference. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification