METHOD FOR CALIBRATING DISTORTION CANCELATION IN DUPLEX COMMUNICATION SYSTEMS
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United States of America Patent
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Jan 21, 2016
app pub date -
Sep 29, 2015
filing date -
Nov 13, 2012
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Abstract
A radio with a system for cancelation of noise, distortion, and interference products is calibrated using a test signal. The test signal is inserted in a radio transmit path, amplified, and down-converted. The test signal may be converted from the digital domain prior to amplification, and up-converted prior to amplification. The down-converted amplified test signal is compared with a signal in the receive path, to measure test signal distortion in the receive path. A distortion model is calibrated based on the test signal, and parameters of the distortion model may be stored.
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