Band-limited 2D Cartesian behavioral modeling of concurrent dual-band RF transmitters

Abstract

This paper reports a novel band-limited two dimensional (2D) Cartesian behavioral model for concurrent dual-band radio frequency (RF) transmitters. The proposed model is based on using a band-limited technique in order to control the bandwidth of the transmitter. This new approach eliminates the bandwidth requirements in wideband concurrent dual-band transmitters in the presence of in-phase/quadrature (I/Q) modulator imperfections. In order to validate this idea, a broadband class AB PA driven concurrently by two independent LTE signals. The results prove that this approach has significant advantage when modeling the band-limited systems.