2-D Digital Predistortion (2-D-DPD) Architecture for Concurrent Dual-Band Transmitters

Bassam, Seyed Aidin; Helaoui, Mohamed; Ghannouchi, Fadhel M.

doi:10.1109/tmtt.2011.2163802

Cited by 254 publications

(157 citation statements)

References 13 publications

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“…Another optimized dual-loop model parameter scheme was also proposed for enhancing the single-loop parameter extraction performance at a cost of slightly increasing the complexity [92]. Table VI summaries the main contributions in the litera- [28], [30], [91] because of their well-known performance in estimating the coefficients of linear-in parameter models. In order to reduce the standard LS complexity and computational latency for physical real-time coefficient extraction and updating, several approaches are also reported in the literature, such as QR-RLS [64] for LUT-based DPDs, the optimized LS [66] for behavior-model-based DPDs, and adaptive basis function based DPD [86].…”

Section: Rf To Digitalmentioning

confidence: 99%

Green Communications: Digital Predistortion for Wideband RF Power Amplifiers

Guan¹,

Zhu

2014

IEEE Microwave

180

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Section: Rf To Digitalmentioning

confidence: 99%

Green Communications: Digital Predistortion for Wideband RF Power Amplifiers

Guan¹,

Zhu

2014

IEEE Microwave

180

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“…For many carrier aggregation scenarios, the carriers may be spaced hundreds of MHz apart. This would lead to their IMD products being spaced even farther apart so that the observation bandwidth necessary to mitigate the spurious emissions becomes infeasible for many analog-to-digital converters (ADCs) and radio-frequency (RF) downconverters [18].…”

Section: Introductionmentioning

confidence: 99%

“…However, most DPD solutions do not completely consider the carrier aggregation scenario. For example, in [18], the effects of intermodulation are considered, but only the bandwidth around the main carrier is linearized.…”

Section: Introductionmentioning

confidence: 99%

Low-complexity, Multi Sub-band Digital Predistortion

Tarver

Abdelaziz

Anttila

et al. 2017

J Sign Process Syst

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The nonlinearities of power amplifiers combined with non-contiguous transmissions found in modern, frequency-agile, wireless standards create undesirable spurious emissions through the nearby spectrum of data carriers. Digital predistortion (DPD) is an effective way of combating spurious emission violations without the need for a significant power reduction in the transmitter leading to better power efficiency and network coverage. In this paper, an iterative, multi subband version of the sub-band DPD, proposed earlier by the authors, is presented. The DPD learning is iterated over intermodulation distortion (IMD) sub-bands until a satisfactory performance is achieved for each of them. A sequential DPD learning procedure is also presented to reduce the hardware complexity when higher order nonlinearities are incorporated in the DPD learning. Improvements in the convergence speed of the adaptive DPD learning are also achieved via incorporating a variable learning rate and interpolation of previously trained DPD coefficients. A WarpLab implementation of the proposed DPD is also shown with excellent suppression of the targeted spurious emissions.

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“…In [10], a two-dimensional digital predistortion (2D-DPD) model was applied in the dual-band PA's linearization successfully. The main difference between 2D-DPD model and single-band DPD model is that the former further takes CM distortion terms into consideration in addition to the IM distortion terms.…”

Section: Introductionmentioning

confidence: 99%

A Low-Complexity Dual-Band Model for Dual-Band Power Amplifiers Based on Volterra Series

Yu¹,

Liu²,

Li³

et al. 2015

PIER Letters

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Abstract-A novel low-complexity dual-band memory polynomial (2D-LCMP) model for linearization of dual-band power amplifiers (PAs) is proposed in this paper. The in-band intermodulation (IM) and cross-band modulation (CM) distortion terms in the prior two-dimensional models have different impacts on the model performance. Therefore, they are considered respectively in the proposed model. Some redundant distortion terms are removed away to decrease the model complexity. In addition, the nonlinearity order and memory depth are frequency dependent for each band. Experimental measurements were performed on two types of wideband PAs. The results prove the superiority of the 2D-LCMP model.

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2-D Digital Predistortion (2-D-DPD) Architecture for Concurrent Dual-Band Transmitters

Cited by 254 publications

References 13 publications

Green Communications: Digital Predistortion for Wideband RF Power Amplifiers

Green Communications: Digital Predistortion for Wideband RF Power Amplifiers

Low-complexity, Multi Sub-band Digital Predistortion

A Low-Complexity Dual-Band Model for Dual-Band Power Amplifiers Based on Volterra Series

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