Baseband derived RF digital predistortion

Kim, W.J.; Cho, K.J.; Stapleton, S.P.; Kim, J.H.

doi:10.1049/el:20060606

Cited by 10 publications

(7 citation statements)

References 3 publications

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“…(5) and Eqn. (7) besides the common AM/AM and AM/PM errors extensively discussed in non-linear PA [15]- [17]. For the "phase-overlap" case where the introduced distortion depends on the inner product of BB I and BB Q , the well-developed IQ gain and phase mismatch compensation method in [10]- [12] cannot work well any more, which further disables the decoupling of mixing imbalances and PA non-linearity in [13] [14].…”

Section: Overlapping Phasesmentioning

confidence: 99%

“…For tackling the existent PM/AM and PM/PM distortion introduced by quadrature modulation errors, such as IQ phase mismatch and duty cycle mismatch, "IQ co-addressing" pre-distortion scheme is adopted here, compared to the "amplitude addressing" solution in linearization of traditional PA [15]- [17].…”

Section: Generic Self-correction Of Static Non-idealities In Dtxmentioning

confidence: 99%

“…There also exists a wide literature base [13]- [17] analyzing impairments in traditional transmitter design, mainly focusing on compensating IQ imbalance, and power amplifier (PA) non-linearity. State-of-theart works [13] [14] can decouple the correction of mixing imbalances and PA non-idealities, which benefits reducing the computational complexity in correcting each individual nonideality.…”

Section: Introductionmentioning

confidence: 99%

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Efficient self-correction scheme for static non-idealities in nano-scale quadrature digital RF transmitters

Ingels

et al. 2013

SiPS 2013 Proceedings

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As a disruptive solution exploiting the intrinsic speed of deeply scaled CMOS technology, digital RF transmitter has attracted extensive attention for its capability to handle multiple radio standards. However, deeply scaled nano level technology has both pros and cons, so that state-of-the-art designs still suffer from the combination of a large number of non-idealities that are inherent in deeply scaled technology. In this paper, a solution is proposed for the first time to tackle major static non-idealities simultaneously in digital RF transmitter employing an ultra-high-bandwidth digitalto-analog converter. Whereas existing work focuses on only correcting one or few non-idealities in isolated ways. The proposed input-signal segmentation and polynomial transforming scheme makes the proposal a computational efficient solution. Simulation combined with lab measurement results show that, after applying the proposed non-linearity selfcorrection scheme, on average, the root-mean-square error of a 28-nm digital RF transmitter output can be reduced by over 20 dB.

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Section: Overlapping Phasesmentioning

confidence: 99%

Section: Generic Self-correction Of Static Non-idealities In Dtxmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Efficient self-correction scheme for static non-idealities in nano-scale quadrature digital RF transmitters

Ingels

et al. 2013

SiPS 2013 Proceedings

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“…Hence, there has been increased emphasis on linearization techniques, both adaptive and non adaptive [2], [3]. For example, digital predistortion is a widely used linearization technique.…”

Section: Introductionmentioning

confidence: 99%

“…Baseband predistortion creates inverse characteristics of the transfer function of the RF power amplifier, thereby increasing the effective 1dB compression point of the power amplifier. Adaptive predistortion uses methods such as the recursive least squares (RLS) algorithm [2,3] to tune the predistorter coefficients during field operation by running specialized tests on the RF front end.…”

Section: Introductionmentioning

confidence: 99%

Concurrent low cost multi-carrier compensation of amplitude and phase distortions in RF power amplifiers

Devarakond

Sen

Chaterjee

2009

2009 IEEE 10th Annual Wireless and Microwave Technology Conference

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Distortion effects of wideband power amplifiers vary significantly with carrier frequency and need to be tested and characterized across a specified (wide) frequency range during production. In this paper, a low cost test approach is presented that allows AM-AM and AM-PM distortion effects of RF power amplifiers to be evaluated at multiple frequencies with a single multi-tone test. The response of the power amplifier is observed using a low cost envelope detector on the tester load board. The observed response is then used to determine the parameters of digital predistortion functions that allow accurate compensation of distortion effects at the relevant frequencies of interest. The predistortion functions are optimized using a twostep procedure that exhibits rapid convergence to the optimal function parameter values.

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MP/LUT baseband digital predistorter for wideband linearisation

Feuvrie

Wang

et al. 2011

Electron. Lett.

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Baseband derived RF digital predistortion

Cited by 10 publications

References 3 publications

Efficient self-correction scheme for static non-idealities in nano-scale quadrature digital RF transmitters

Efficient self-correction scheme for static non-idealities in nano-scale quadrature digital RF transmitters

Concurrent low cost multi-carrier compensation of amplitude and phase distortions in RF power amplifiers

MP/LUT baseband digital predistorter for wideband linearisation

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