Invention Grant
- Patent Title: Efficient feedback of channel information in a closed loop beamforming wireless communication system
- Patent Title (中): 在闭环波束成形无线通信系统中有效地反馈信道信息
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Application No.: US11237341Application Date: 2005-09-28
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Publication No.: US08416862B2Publication Date: 2013-04-09
- Inventor: Carlos Aldana , Joonsuk Kim
- Applicant: Carlos Aldana , Joonsuk Kim
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Garlick & Markison
- Agent Holly L. Rudnick
- Main IPC: H04K1/10
- IPC: H04K1/10

Abstract:
A method for feeding back transmitter beamforming information from a receiving wireless communication device to a transmitting wireless communication device includes a receiving wireless communication device receiving a preamble sequence from the transmitting wireless device. The receiving wireless device estimates a channel response based upon the preamble sequence and then determines an estimated transmitter beamforming unitary matrix based upon the channel response and a receiver beamforming unitary matrix. The receiving wireless device then decomposes the estimated transmitter beamforming unitary matrix to produce the transmitter beamforming information and then wirelessly sends the transmitter beamforming information to the transmitting wireless device. The receiving wireless device may transform the estimated transmitter beamforming unitary matrix using a QR decomposition operation such as a Givens Rotation operation to produce the transformer beamforming information.
Public/Granted literature
- US20060239374A1 Efficient feedback of channel information in a closed loop beamforming wireless communication system Public/Granted day:2006-10-26
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