SUBCHANNEL FEEDBACK FOR OFDMA SYSTEMS

摘要

A method of sub-channel feedback in OFDMA systems is provided. A wireless receiving device (STA) receives a radio signal from a transmitting device (AP) over a wide channel in an OFDMA system. The radio signal is transmitted over multiple sub-channels of the wide channel. The STA estimates channel quality information based on the received radio signal for each sub-channel. The STA then sends feedback information to the transmitting device. The feedback information comprises the estimated channel quality information for a selected subset of sub-channels from the wide channel based on a predefined rule. In one embodiment, the feedback information is embedded within an ACK/BA frame or is carried in a frame immediately subsequent to the ACK/BA frame.

主权项

1. A method comprising:
(a) receiving a radio signal transmitted from a transmitting device over a wide channel by a receiving device in an OFDMA wireless system, wherein the radio signal is transmitted over multiple sub-channels of the wide channel; (b) estimating channel quality information based on the received radio signal for each sub-channel; and (c) sending feedback information to the transmitting device, wherein the feedback information contains the estimated channel quality information for a selected subset of sub-channels from the wide channel based on a predefined rule.