December 11, 2017
Comments Off on Beamforming OFDM Performance Under Joint Phase Noise and IQ Imbalance
Posted in: IEEE 2017, NS2
Beamforming OFDM Performance Under Joint Phase Noise and I/Q Imbalance Abstract Phase noise (PHN) and in-phase/quadrature (I/Q) imbalance are two major radio-frequency (RF) impairments in direct-conversion wireless transceivers. Beamforming and orthogonal frequency-division multiplexing (OFDM) schemes have been adopted in broadband wireless standards due to their significant performance gains. In this paper, we analyze the impact of joint I/Q imbalance and PHN onbeamforming OFDM direct-conversion transceivers. We derive an exact […]
December 11, 2017
Comments Off on Doherty Power Amplifier With Extended Bandwidth and Improved Linearizability Under Carrier-Aggregated
Posted in: IEEE 2017, NS2
Doherty Power Amplifier With Extended Bandwidth and Improved Linearizability Under Carrier-Aggregated Abstract This letter proposes a novel output combining network devised to extend a Doherty power amplifier’s (DPA’s) radio frequency bandwidth (RFBW), while maintaining the proper load modulation, and to ensure its linearizability when driven with intra- and inter-band carrier aggregated (CA) communication signals. Based on the proposed topology, a wideband 20-W DPA was designed and implemented […]