Patent ID: 6125266
Filing Date: 2000-09-26
Classification: H03C,H03F,H04B,H04L

Abstract:
A mobile station for conducting bidirectional wireless communications, comprising:a transmit chain including a modulator, an upconverter for converting an output of the modulator to a transmit frequency signal, and a transmit amplifier having an input coupled to an output of the upconverter for amplifying said transmit frequency signal;a receive chain including a receiver, a downconverter for converting an output of the receiver to an intermediate frequency (IF) signal, and a demodulator having an input coupled to an output of the downconverter;circuitry for downconverting an output of said transmit amplifier to said IF signal and for selectively coupling said transmit amplifier downconverted signal to said input of said demodulator; andcircuitry coupled to an output of said demodulator for determining an amount of predistortion to be applied to signals input to said modulator to achieve a desired amount of transmit frequency signal linearization.