A 45-GHz Si/SiGe 256-QAM transmitter with digital predistortion

Wu, Po-Yi; Liu, Youjiang; Hanafi, Bassel; Dabag, Hayg-Taniel; Asbeck, P.M.; Buckwalter, James F.

doi:10.1109/mwsym.2015.7166824

Cited by 10 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, amplitude control is used to reduce the sidelobes and therefore PAs operate at different power levels. In [2] and [3], the array DPD is adressed, but the experimental setup uses a reference antenna in the array far field, which might not be practical approach. Phased array DPD with common feedback is presented in [4] by modelling each PA independently.…”

Section: Introductionmentioning

confidence: 99%

Digital predistortion of amplitude varying phased array utilising over-the-air combining

Tervo

Aikio

Tuovinen

et al. 2017

2017 IEEE MTT-S International Microwave Symposium (IMS)

View full text Add to dashboard Cite

Abstract-In this paper, we propose a simple polynomial linearisation technique for nonlinear phased arrays including amplitude control. Due to the large number of antennas and thus power amplifiers in the array, it is inefficient to linearise each power amplifier individually. Therefore, it is demonstrated that the array can be linearised over-the-air using single polynomial. The simulations show that the linearisation is achieved by first linearising the higher driven PAs at the precompression region and then cancelling the compression by the heavily expanding lower driven PAs. The proposed approach offers an alternative way of re-thinking the concept of array linearisation over multiple PAs.Index Terms-digital predistortion, hybrid beamforming, polynomial model, power amplifiers, 5G.

show abstract

Section: Introductionmentioning

confidence: 99%