发明申请
- 专利标题: Methods for monitoring channel sounding quality in WLAN devices
- 专利标题(中): WLAN设备监听通道音质的方法
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申请号: US13373305申请日: 2011-11-10
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公开(公告)号: US20120120839A1公开(公告)日: 2012-05-17
- 发明人: Jianhan Liu , Vishakan Ponnampalam , James June-Ming Wang
- 申请人: Jianhan Liu , Vishakan Ponnampalam , James June-Ming Wang
- 专利权人: MEDIA TEK Singapore Pte Ltd.
- 当前专利权人: MEDIA TEK Singapore Pte Ltd.
- 主分类号: H04W24/00
- IPC分类号: H04W24/00
摘要:
A method of monitoring channel-sounding quality for VHT WiFi devices is provided. A mobile station (the receiver) receives a sounding signal transmitted from an access point (the transmitter) over one or multiple sub-channels of a wide channel in a wireless network. The receiver performs channel estimation and determines an estimated channel response matrix. The receiver then calculates sounding quality for each valid sub-channel by computing an estimation error of the received sounding signal based on the estimated channel matrix. The receiver transmits a feedback message to the transmitter. The feedback message contains sounding quality information derived from the calculated channel sounding quality. If the channel sounding qualities for all valid sub-channels are poor, then a null VHT channel feedback frame is sent back to the transmitter.