Patent ID: 8064856

Claim:
A power amplifier for a base station, comprising: a baseband modulator configured to receive a baseband amplitude component and generate a baseband modulated pulse string; an oscillator configured to receive a baseband phase component and generate phase modulated complex carrier signals; a complex up-converter configured to receive and mix the baseband modulated pulse string with the phase modulated complex carrier signals into mixed product signals; two or more switched mode power amplifiers coupled to the complex up-converter, configured to amplify and switch the mixed product signals at a carrier frequency encoded within the mixed product signals; two or more complex filters individually coupled to a respective one of the switch mode power amplifiers, and configured to suppress image components in the amplified and switched mixed product signals; and a power combiner coupled to the two or more complex filters, configured to combine a real component of the complex filtered and amplified and switched mixed product signals to generate an RF transmission signal.