Method for selecting antennas in a wireless networks
AssigneeMitsubishi Electric Research Laboratories, Inc.
InventorsKoon Hoo Teo, Neelesh B. Mehta, Andreas F. Molisch
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Abstract
A method selects antennas in a wireless network including a base station and one or more transceivers. The base station specifies times, subcarriers and subsets of antennas to use to transmit sounding reference signals (SRS) to the base station. Then, the transceiver transmits the SRS according to the specified times and subcarriers using different subsets of the set antennas. The SRS are received in the base station, and the base station selects one of the different subset of the antennas based on the received SRS, and indicates the selected subset of the antennas to the transceiver.
Claims18
A method for selecting antennas in a wireless network including a base station and one or more transceivers, comprising:
- specifying, in a wireless network including a base station and a transceiver having a set of antennas, times, subcarriers and subsets of the set of antennas the transceiver is to use to transmit sounding reference signals (SRS) to the base station;
- transmitting, by the transceiver, the SRS according to the specified times, subcarriers and the subsets of the antennas;
- receiving the SRS in the base station;
- estimating, by the base station for each different subset of the antennas, channel state information (CSI) from the SRS received by the base station from the corresponding subset of the antennas, wherein the base station has a plurality of CSI;
- applying linear prediction and a minimum mean-squared error criterion to the plurality of CSI to obtain a current CSI;
- selecting, in the base station, one of the subset of the antennas based on the received SRS and the current CSI;
- and
- indicating the selected subset of the antennas to the transceiver.
Dependencies are inferred from the claim text.