High-Purity Sine Wave Generation Using Nonlinear DAC With Predistortion Based on Low-Cost Accurate DAC–ADC Co-Testing

Zhuang, Yuming; Magstadt, Benjamin; Chen, Tao; Chen, Degang

doi:10.1109/tim.2017.2769238

Cited by 15 publications

(4 citation statements)

References 13 publications

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“…Neural Network-Based Model Waveform Processing at Transmission and Observation Path [67], [81], [89]- [103] [110]- [120], [122], [123] [67], [75], [82]- [88] DAC and ADC nonidealities [29], [130], [133]- [141] RF Sub-Components Effects [130]- [132], [142], [145] [130], [131] Amplitude-Compensated Phase Shifter [78], [79], [148]- [155], [157], [158] Phase-Compensated and Low-Noise Variable Gain Amplifier [44], [149], [159]- [169] SVM-Based Model better output performance. Since the invention of wireless communication, the linearity of transmitting signals hold paramount importance [73], [74].…”

Section: Baseband Waveform Processing Volterra Series-based Modelmentioning

confidence: 99%

“…These discontinuities bring marginal inconsistencies between simulated and measured results [22], [25]. In this pursuit, the recent research works present energycost efficient performances of data converters under different operating conditions, e.g., [130], where the performance constraints of high-precision ADCs are eliminated after defining the PD codes at DAC input, which as a result, characterizes the DAC/ADC co-testing at the same time overcoming the sensitivity of large feedback overheads. Whereas the paper [131] proposes a fast heuristic linearity characterization of standalone PA, which effectively adjusts the amplitude synchronization and phase-coherence of IB signal while considering the practical constraints of spectral regrowth in up to the five channels of DUT.…”

Section: • Critical Analysismentioning

confidence: 99%

“…This sort of on-chip DPD integration has given new research directions to leverage the cost-effective benefits of scaled semiconductor technology [133]. However, the massive distributions of IC connections in MIMO systems present unpredictable nonlinearities across the entire TRX subsystems, making it compulsory for the test signals to evade the sine waves offset [130]. In the opposite scenario, the causal dynamic drifts of the supply voltage hinder the desired ACPR and error vector magnitude (EVM) of the modulation signal [140], [141].…”

Section: • Critical Analysismentioning

confidence: 99%

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

Haider

You

et al. 2022

IEEE Commun. Surv. Tutorials

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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.

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Section: Baseband Waveform Processing Volterra Series-based Modelmentioning

confidence: 99%

Section: • Critical Analysismentioning

confidence: 99%

Section: • Critical Analysismentioning

confidence: 99%

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

Haider

You

et al. 2022

IEEE Commun. Surv. Tutorials

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“…The need to go beyond specifications of series produced commercial generators led several laboratories to the development of dedicated techniques, e.g. where high frequency resolution (better than 10 µHz [5]) or improved stability (voltage ratio stability of two outputs up to 0.01 × 10 −6 for 30 min measurements [6]) of output signals was achieved, distortion of sinewave was lowered [7]. This paper describes in detail the design of a sinewave generator (SWG), beyond previous design reported in [5,6], with high resolution for amplitude and phase angle, operating from 1 mHz to tens of kHz, and optimized especially for the audio frequency range.…”

Section: Introductionmentioning

confidence: 99%

Characterization of a precision modular sinewave generator

Kucera

Kovac

Palafox

et al. 2020

Meas. Sci. Technol.

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At the Czech Metrology Institute (CMI) we have developed a precision modular sinewave generator for impedance ratio bridges. The generator was developed to improve previously available designs regarding amplitude and phase accuracy, linearity, absolute stability, stability of the ratio between two outputs and harmonic distortion. It generates up to 7 Vrms in a frequency range from 1 mHz up to 20 kHz, extendable to 100 kHz with small changes to the filters. The amplitude resolution is better than 0.01 μV V−1 of full scale with an output voltage stability of 0.05 μV V−1/30 min and a stability for the ratio between two outputs of 0.02 × 10−6 over several hours. The generator can be powered from internal batteries and is controlled via optically isolated connections. The internal clock and voltage references can be replaced by external ones, optically coupled in the case of the clock. In this paper, we discuss experimental results obtained with the generator used as a signal source in digital impedance bridges with relative combined uncertainties from 10–5 down to 10–8. The generators have been used in a bridge to drive a quantum Hall resistor in the AC regime. The use of a generator with an AC quantum voltmeter will also be discussed. The generator is not only applicable in the field of AC impedance metrology but also for on-site comparisons of AC quantum voltage standards or, in general, where there is a need for precision voltage sources.

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