Digital Predistortion in High Throughput Satellites: Architectures and Performance

Usman, Ovais Bin; Knopp, Andreas

doi:10.1109/access.2021.3065745

Cited by 10 publications

(6 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the DPD-MP metric has been actively investigated for the onboard-aware satellite transponder to counter the grave dynamic distortions of transponder filters and high PAs. In [239], the main architecture of the onboard satellite compound involving the ground-station-based DPD operation with the multicarrier mode is considered. In this satellite network, the MP resources have been allocated based on the band limitation (high sampling rate) constraints in DPD forward path.…”

Section: B Satellite Communicationsmentioning

confidence: 99%

“…Hence, under the constraint of spectral regrowth at the transponder, an adaptive estimation of DSP algorithms is interpreted either in DLA or IDLA, depending on the specific application scenarios of adopted carrier waveforms. To this end, the DPD model can either be exploited at onboard [238], [239] or on-ground [240] level to evaluate the performance of satellite when handling nonlinearities for higher transponder throughput, includes:…”

Section: B Satellite Communicationsmentioning

confidence: 99%

See 1 more Smart Citation

Predistortion-Based Linearization for 5G and Beyond Millimeter-Wave Transceiver Systems: A Comprehensive Survey

Haider

You

et al. 2022

IEEE Commun. Surv. Tutorials

View full text Add to dashboard Cite

The next-generation (5G/6G) wireless communication aims to leapfrog the currently occupied sub-6 GHz spectrum to the wideband millimeter-wave (MMW) spectrum. However, MMW spectrums with high-order modulation schemes drive the power amplifier (PA) at significant back-off, causing severe nonlinear distortions, thus deteriorating the transceiver's (TRXs) modulation process. Typically, the TRX efficacy is quantified with standardized linearization matrices, which take advantage of different predistortion (PD) schemes to handle deep compression of the PA. In this regard, TRX baseband signals are mostly linearized in the digital domain, where digitally controlled linearization needs higher sampling rates due to increasing MMW bandwidths to compensate for intermodulation (IMD) products, resulting in increased system cost and power consumption. Alternately, the digitally controlled analog-based linearization, i.e., the hybridization of digital predistortion (DPD) and analog predistortion (APD), is highly productive and cost-effective for fulfilling the linearized energy-efficient design vision of MMW networks. Therefore, this paper puts an extensive spotlight on the progress in PD-based linearization for 5G and beyond communications. It first provides background information on the advancements of PD schemes through recent surveys, then classifies the general roadmap of PD waveform processing across the TRX system models as preliminary. After this, we present three prominent PD architectures and their design approaches with intrinsic performance metrics. Finally, we explore four case studies encompassing PD operation under certain nonlinear constraints of different communication schemes. We examine the suitability of PD-based linearization solutions, both existing and proposed till the first quarter of 2022, and identify the potential prospects in this domain.

show abstract

Section: B Satellite Communicationsmentioning

confidence: 99%

Section: B Satellite Communicationsmentioning

confidence: 99%

Predistortion-Based Linearization for 5G and Beyond Millimeter-Wave Transceiver Systems: A Comprehensive Survey

Haider

You

et al. 2022

IEEE Commun. Surv. Tutorials

View full text Add to dashboard Cite

show abstract

“…are neglected. Furthermore, practical systems (especially in multicarrier mode) rely on high power amplifier (HPA) linearization or predistortion techniques [31], [32], which leads to a low level of nonlinearities in the system. The interaction between linear and nonlinear distortions has been described in [33].…”

Section: B End-to-end System Modelmentioning

confidence: 99%

Filter Distortions in Ultra High-Throughput Satellites: Models, Parameters and Multicarrier Optimization

Colin

Delamotte

Knopp

2022

IEEE Trans. Signal Process.

View full text Add to dashboard Cite

Ultra high-throughput satellite systems are expected to play an essential role in future beyond 5G and 6G networks. These systems must remain as flexible as possible to adapt to heterogeneous traffic demands, while also delivering the highest possible rate for dedicated services. Satellites flexible payloads are increasingly employing wideband output multiplexers. In this context, it is now more important than ever to evaluate frequencydependent degradations on multicarrier signals. In particular, it is critical to characterize the distortions entailed by the output multiplexers filters. In this paper, models are presented and novel formulas are derived to determine the carrier-to-interference ratio resulting from these distortions. Derivations are oriented towards the applicability of either high-accuracy (e.g., for link budget) or low-complexity calculations (e.g., for real-time carrier allocation). The influence of key parameters such as the optimal decision instant, symbol rate and roll-off factor is thoroughly analyzed. Furthermore, formulas are evaluated in a practical scenario: the dynamic carrier allocation optimization. They are combined with efficient optimization algorithms to obtain the best performance based on user fairness. Relevant metrics such as accuracy, complexity and allocation gain are also investigated. In the end, the application of the proposed formulas and algorithms leads to a significant allocation gain that is increasing with the number of carriers. The feasibility of real-time dynamic carrier allocation to further increase the capacity of the next generation of satellite systems is emphasized.

show abstract

Section: B End-to-end System Modelmentioning

confidence: 99%

Filter Distortions in Ultra High-Throughput Satellites: Models, Parameters and Multicarrier Optimization

Colin¹,

Delamotte²,

Knopp³

2021

Preprint

Self Cite

View full text Add to dashboard Cite

<div>Ultra high-throughput satellite systems are expected to play an essential role in future beyond 5G and 6G networks. These systems must remain as flexible as possible to adapt to heterogeneous traffic demands, while also delivering the highest possible rate for dedicated services. Satellites flexible payloads are increasingly employing wideband output multiplexers. In this context, it is now more important than ever to evaluate frequency-dependent degradations on multicarrier signals. In particular, it is critical to characterize the distortions entailed by the output multiplexers filters. In this paper, models are presented and novel formulas are derived to determine the carrier-to-interference ratio resulting from these distortions. Derivations are oriented towards the applicability of either high-accuracy (e.g., for link budget) or low-complexity calculations (e.g., for real-time carrier allocation). The influence of key parameters such as the optimal decision instant, symbol rate and roll-off factor is thoroughly analyzed. Furthermore, formulas are evaluated in a practical scenario: the dynamic carrier allocation optimization. They are combined with efficient optimization algorithms to obtain the best performance based on user fairness. Relevant metrics such as accuracy, complexity and allocation gain are also investigated. In the end, the application of the proposed formulas and algorithms leads to a significant allocation gain that is increasing with the number of carriers. The feasibility of real-time dynamic carrier allocation to further increase the capacity of the next generation of satellite systems is emphasized.</div>

show abstract

Digital Predistortion in High Throughput Satellites: Architectures and Performance

Cited by 10 publications

References 37 publications

Predistortion-Based Linearization for 5G and Beyond Millimeter-Wave Transceiver Systems: A Comprehensive Survey

Predistortion-Based Linearization for 5G and Beyond Millimeter-Wave Transceiver Systems: A Comprehensive Survey

Filter Distortions in Ultra High-Throughput Satellites: Models, Parameters and Multicarrier Optimization

Filter Distortions in Ultra High-Throughput Satellites: Models, Parameters and Multicarrier Optimization

Contact Info

Product

Resources

About