Power-efficient channel condition feedback for OFDM channels

摘要

A network device includes a first transceiver configured to wirelessly receive a first packet from a second transceiver via a channel. The second transceiver is in a wireless device separate from the network device. A circuit is configured to determine a condition of the channel based on the first packet. The circuit has an inactive state and an active state. Elements of the circuit are powered while the circuit is in the active state. The elements of the circuit are not powered while the circuit is in the inactive state. A controller is configured to transition the circuit from the inactive state to the active state in response to the first transceiver wirelessly receiving the first packet, and return the circuit to the inactive state responsive to the circuit having completed determining the condition of the channel.