Linearization of a concurrent dual-band transmitter exhibiting nonlinear distortion and hardware impairments using baseband injection

Abstract

This presents a one step solution to compensate for the power amplifier (PA) nonlinearities and in-phase/quadrature (I/Q) impairments for concurrent dual-band radio frequency (RF) transmitters. This technique is proposed that compensate the in-band intermodulation (IMD) and the cross-modulation distortion (CMD) products in the presence of I/Q imbalance and DC offset imperfections simultaneously using the concept of injection in the baseband block. The measurement results for a concurrent dual-band PA class AB clearly prove the effectiveness and the superiority of the porposed approach in comparison with the state of art technique.