CHANNEL STATE INFORMATION CALIBRATION
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United States of America Patent
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N/A
Issued Date -
Jun 12, 2014
app pub date -
Dec 28, 2012
filing date -
Dec 11, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A dedicated calibration device may be utilized by a wireless transceiver device, such as a base station, to compute compensation matrices. The wireless transceiver device and the dedicated calibration device can exchange training sequence signals. Based on the exchanged training sequence signals, the wireless transceiver device and the dedicated calibration device can estimate overall baseband to baseband channel responses taking into account the amplitude and phase responses of the respective transmit and receive radio chains, and the wireless transceiver device can determine the compensation matrices. Furthermore, the wireless transceiver device can estimate a baseband-to-baseband uplink channel response relative to actual user equipment, approximate a downlink channel response using only one of the determined compensation matrices, and perform beamforming to the actual user equipment using the approximated downlink channel response.
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