COMPACT WIDE DYNAMIC RANGE TRANSMITTER FOR POINT TO POINT RADIO

摘要

A radio frequency transmitter comprising a modem which receives one or more input data signals and an adaptive predistortion signal and provides a baseband in-phase signal and a baseband quadrature signal. The transmitter may comprise a power amplifier module which receives the in-phase and quadrature phase signals and provides a radio frequency output signal. A predistortion module receives the radio frequency signal, downconverts the radio frequency signal to an intermediate frequency signal, and downconverts the intermediate frequency signal to a baseband feedback signal. The transmitter samples the feedback signal and provides an adaptive predistortion signal to the modem.

主权项

1. A radio frequency transmitter comprising:
a modem for receiving one or more input data signals and an adaptive predistortion signal, the modem providing provides a baseband in-phase (“I”) signal and a baseband quadrature (“Q”) signal, each of the I and Q signals being based on the input data signals and the adaptive predistortion signal; a power amplifier module coupled to the modem, the power amplifier module for amplifying the I and Q signals into a radio frequency (“RF”) output signal; and a predistortion module coupled to the power amplifier module and the modem, the predistortion module for receiving the RF signal, for downconverting the RF signal to an intermediate frequency (“IF”) signal, for downconverting the IF signal to a baseband feedback signal, and for sampling the feedback signal to provide the adaptive predistortion signal to the modem.