McClure, Qualey & Rodack, LLP
Integrity and quality monitoring and signaling for sounding and reduced feedback
A method of sounding and feedback with channel quality information and reduced overhead is provided. A receiving station receives a sounding signal transmitted from an access point over multiple sub-channels of a wide channel in a wireless network. The receiving station detects channel quality based on the received sounding signal for each sub-channel. The receiving station then performs channel estimation based on the received sounding signal and thereby determining feedback information. Finally, the receiving station transmits a feedback message to the access point, the feedback message contains NULL feedback information, reduced feedback information, or channel integrity/quality indicators based on the channel quality information for each sub-channel. Based on the feedback message, the access point may repeat the sounding process, narrow the transmission bandwidth, or select only stations who have indicated uncorrupted channel sounding for MU-MMO transmission.
MEDIATEK SINGAPORE PTE. LTD.
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Vishakan James June-Ming Chao-Chun Huanchun Jianhan
Ponnampalam Wang Wang Ye Liu