System and method capable of closed loop MIMO calibration
First Claim
1. A method of closed loop MIMO calibration in a wireless communication system, comprising:
- using mutual calibration in said wireless communication system by detecting that station calibration is obsolete and requires calibration;
determining a range of automatic gain control which said station wants to calibrate and determining a list of transmission power for an Access Point (AP) in communication with said station;
initiating by said station the calibration by sending said power list and N channel sounding preambles, where N is the number of transmit antennas at the station;
receiving from said AP a channel matrix and L sets of channel sounding preambles with a different transmission power level for each set, where L is the number of entries in the power list;
switching to an automatic gain control level of the station in response to the transmission power level received from said AP; and
sending calibration data to said AP to calibrate a range of automatic gain control for the AP to transmit to the station.
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Accused Products
Abstract
An embodiment of the present invention provides a method of closed loop MIMO calibration in a wireless communication system, comprising detecting that station calibration is obsolete and requires calibration, determining a range of automatic gain control which the station wants to calibrate and determining a list of transmission power for an Access Point (AP) in communication with the station, initiating by the station the calibration by sending the power list and N channel sounding preambles, where N is the number of transmit antennas at the station; and sending back by the AP a channel matrix and L sets of channel sounding preambles with a different transmission power level for each set, where L is the number of entries in the power list.
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Citations
24 Claims
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1. A method of closed loop MIMO calibration in a wireless communication system, comprising:
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using mutual calibration in said wireless communication system by detecting that station calibration is obsolete and requires calibration; determining a range of automatic gain control which said station wants to calibrate and determining a list of transmission power for an Access Point (AP) in communication with said station; initiating by said station the calibration by sending said power list and N channel sounding preambles, where N is the number of transmit antennas at the station; receiving from said AP a channel matrix and L sets of channel sounding preambles with a different transmission power level for each set, where L is the number of entries in the power list; switching to an automatic gain control level of the station in response to the transmission power level received from said AP; and sending calibration data to said AP to calibrate a range of automatic gain control for the AP to transmit to the station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A wireless communication system capable of closed loop MIMO calibration, comprising:
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a wireless station capable of detecting using mutual calibration that station calibration is obsolete and requires calibration and determining a range of automatic gain control which said station wants to calibrate and determining a list of transmission power for an Access Point (AP) in communication with said station; said station to initiate the calibration by sending said power list and N channel sounding preambles, where N is the number of transmit antennas at the station; and said station to receive back from the AP a channel matrix and L sets of channel sounding preambles with a different transmission power level for each set, where L is the number of entries in the power list; said station to switch to an automatic gain control level of the station in response to the transmission power level received from said AP; and said station to send calibration data to said AP to calibrate a range of automatic gain control for the AP to transmit to the station. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An article comprising a storage computer readable medium having stored thereon instructions, that, when executed by a computing platform, results in:
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using mutual calibration in a closed-loop MIMO system to detect that station calibration is obsolete and requires calibration; determining a range of automatic gain control which said station wants to calibrate and determining a list of transmission power for an Access Point (AP) in communication with said station; initiating by said station the calibration by sending said power list and N channel sounding preambles, where N is the number of transmit antennas at the station; and receiving back from said AP a channel matrix and L sets of channel sounding preambles with a different transmission power level for each set, where L is the number of entries in the power list switching to an automatic gain control level of the station in response to the transmission power level received from said AP; and sending calibration data to said AP to calibrate a range of automatic gain control for the AP to transmit to the station. - View Dependent Claims (22, 23, 24)
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Specification