Evaluation of the Dual-Band PA Nonlinear Behavior for 5G Signals

In this paper, the assessment of the digital linearization technique’s influence on a dual-band power amplifier was carried out. The linearization technique requires utilization of the second-order nonlinear signals in the baseband which modulate the second harmonic of the carrier. The dual-band power amplifier (PA) operates concurrently at two widely spaced frequencies, 2.1 GHz and 5 GHz. The linearization of the dual-band PA is executed in simulation for both considered frequency bands independently. Results accomplished through the linearization process for various output power levels were acquired for FBMC, FOFDM and UFMC signals, which represent modulation forms for the 5G systems.