Method and apparatus for beamforming calibration in point to multipoint communication systems
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United States of America Patent
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Apr 17, 2018
Issued Date -
N/A
app pub date -
May 27, 2016
filing date -
May 27, 2016
priority date (Note) -
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Abstract
Methods and apparatus for calibrating an antenna array are provided. A limited number of antenna elements of the array are operated to broadcast a signal. The signal carries information relevant to operation of a communication network, for receipt by other devices. By using one or a limited number of antenna elements, a radiation pattern covering a wide area is achieved. Concurrently, transmission of the broadcast signal is monitored using another one or more antenna elements of the array, operating in a receive mode. The monitored signal is used in an antenna array calibration operation. The procedure is repeated for various different transmitting and receiving antenna elements, resulting in a sequence of broadcasts using different parts of the array. The calibration results can be used to correct for operating errors such as phase shifter errors. The corrected phase shifters can then be used for beamforming during another phase of communication.
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