Wi-Fi Adaptive Transmit Antenna Selection

摘要

Wireless communication devices (UEs) may include multiple receive (RX) chains and associated antennas, and at least one transmit (TX) chain co-located with one of the RX chains. The UE may track instant fading of the antenna gain(s) during reception of packets from an associated access point (AP) device to which the UE intends to transmit packets. The UE may also track long term antenna gain(s), using any packets received at the multiple RX chains within the UE. At a switching occasion, a decision is made by the UE whether to switch antennas. If the instant fading detection is based on packets received no later than a specified time period prior to the switching occasion, then the UE may make the switching decision based on the results of the instant fading tracking. Otherwise, the UE may make the switching decision based on the results of the long term antenna gain tracking.

主权项

1. A wireless communication device comprising:
a plurality of antennas configured to transmit and receive signals; a plurality of receive (RX) chains corresponding to the plurality of antennas and configured to receive RX signals from the plurality of antennas; a transmit (TX) chain co-located with a first RX chain of the plurality of RX chains and configured to provide TX signals to the plurality of antennas; and a processing element configured to interoperate with at least the plurality of RX chains to cause the wireless device to:
track instant changes in respective gain performance of at least two antennas of the plurality of antennas during operation of respective RX chains of the plurality of RX chains interoperating with the at least two antennas;track respective long term gains of the at least two antennas during operation of the respective RX chains; anddetermine, at a switching occasion, which antenna of the at least two antennas to select for use when transmitting TX packets via the TX chain, responsive to one of:
first information corresponding to the tracked instant changes; orsecond information corresponding to the tracked respective long term gains.