Methods, processing device, computer programs, computer program products, and antenna apparatus for calibration of antenna apparatus
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United States of America Patent
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Issued Date -
Dec 18, 2014
app pub date -
Oct 21, 2011
filing date -
Oct 21, 2011
priority date (Note) -
Abandoned
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Abstract
The invention relates to a method 20 in an antenna array system 15 for calibration of an antenna apparatus 1. The method 20 comprises: estimating 21 coarse receive delays for the receive chains 51, . . . , 5n and coarse transmit delays for the transmit chains 61, . . . , 6n; adjusting 22 a timing of the receive chains 51, . . . , 5n based on the estimated coarse receive delays so that the receive chains 51, . . . , 5n align with the maximum coarse receive delay difference and adjusting a timing of the transmit chains 61, . . . , 6n based on the estimated coarse transmit delays so that the transmit chains 61, . . . , 6n align with the maximum coarse transmit delay difference; estimating 23 a fine delay and initial phase for the receive chains 51, . . . , 5n and the transmit chains 61, . . . , 6n based on their phase-frequency characteristics; adjusting 24 an intermediate frequency timing of the antenna apparatus 1 based on the estimated fine delay; compensating 25 initial phase and residual delay at base band frequency-domain signal; estimating 26 amplitude-frequency characteristics of the transceiver chains 41, . . . , 4n; and compensating 27 the estimated amplitude-frequency characteristics at base band frequency-domain signal.
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