New analog predistorer using mixing operation for independent control of IM3 components

Abstract

This article reports new predistorters using mixing operation. For compensate the memory effect of the power amplifier, the lower and upper third-order intermodulation components in the PD are controlled independently. From the measured results for a two-tone signal with 20-MHz tone spacing, the significant IM.3 cancellation over 40 dB is achieved over a whole output power range. (c) 2007 Wiley Periodicals. Inc.