System for set-up of transmitters in high capacity digital radio

Details System for set-up of transmitters in high capacity digital radio System for set-up of transmitters in high capacity digital radio

1990-12-19

1993-04-20

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

375 58, 455115, 455 673, 330149, 332159, H04L 2549

Patent

active

052048810

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.

REFERENCES:
patent: 4291277 (1981-09-01), Davis et al.
patent: 4462001 (1984-07-01), Girard
patent: 4890300 (1989-12-01), Andrews
patent: 4890301 (1989-12-01), Hedberg
patent: 4991164 (1991-02-01), Casiraghi et al.
patent: 4993021 (1991-02-01), Nannicini et al.

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