21-01-2016 дата публикации
Номер: US20160020859A1
Принадлежит:
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. 1. A method for calibrating a distortion canceling system in a radio , comprising:inserting a test signal in a radio transmit path;amplifying the test signal;down-converting the amplified test signal;comparing the down-converted amplified test signal with a receive path signal to measure test signal distortion in the receive path signal; andcalibrating a distortion model based on the test signal distortion.2. The method of claim 1 , further comprising modulating the test signal prior to amplifying it.3. The method of claim 1 , further comprising converting the test signal from a digital domain to an analog domain prior to amplifying it.4. The method of claim 1 , further comprising up-converting the test signal prior to amplifying it.5. The method of claim 1 , further comprising storing parameters of the distortion model. This application claims priority from U.S. Provisional Patent Application Ser. No. 61/725,953, entitled “Method and System for Signal Dynamic Range Improvement for Frequency-Division Duplex Communication Systems”, filed on Nov. 13, 2012, which is hereby incorporated by reference herein for all purposes.This application is a divisional of U.S. patent application Ser. No. 14/079,392, entitled “Method and System for Signal Dynamic Range Improvement for Frequency-Division Duplex Communication Systems”, filed on Nov. 13, 2013, which is hereby incorporated by reference as if set ...
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