System for set-up of transmitters in high capacity digital radio links
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United States of America Patent
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Apr 20, 1993
Grant Date -
N/A
app pub date -
Dec 19, 1990
filing date -
Dec 21, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a system for initializing transmitters in high capacity digital radio links, in which a digital signal with QAM (Quadrature Amplitude Modulation) modulation is transmitted over a radio frequency carrier wave. The initialization of the transmitter is accomplished by generating a plurality of sinusoidal signals (tones), adding those tones together to simulate a digital singal to be transmitted, sending the simulated digital signal through the transmitter, and adjusting the transmitter to compensate for the intermodulation odd order products developed as a result of the nonlinearity of the power amplifier in the transmitter.
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