MULTICARRIER DYNAMIC PREDISTORTION FOR DIGITAL TRANSMISSION
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United States of America Patent
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Issued Date -
Oct 1, 2015
app pub date -
Mar 31, 2015
filing date -
Mar 31, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An approach for predistorting signals to be transmitted via a multicarrier satellite transponder to account for inter-symbol interference. Multiple source signals are received. A transmit filter model is applied to each source signal to generate a respective filtered signal. Each filtered signal is translated to a carrier frequency, and the translated signals are summed to generate a composite signal. A common non-linearity model is applied to the composite signal to generate a model transmit signal. The transmit signal is translated to generate a receive signal estimate for each of the filtered signals. A receive filter model is applied to each receive estimate to generate a filtered estimate. Each filtered estimate is subtracted from the respective source signal to generate an error sequence. A fraction of the error sequence is added to the respective source signal to generate a predistorted signal for transmission via a multicarrier satellite transponder.
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