Capturing asymmetry in distortion of an RF system using a multislice behavioral model

Walker, A.; Steer, M.B.; Gard, K.G.

doi:10.1109/lmwc.2006.872114

Cited by 8 publications

(5 citation statements)

References 8 publications

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“…The basic multi‐slice model shown in Figure was developed for narrowband applications and needs to be enhanced in order to handle wideband input signals. In the enhanced version of the model shown in Figure , the nonlinearity in the first slice NL 1 is still an odd‐order polynomial but with complex coefficients.…”

Section: Enhanced Multi‐slice Model: Architecture and Extractionmentioning

confidence: 99%

“…Single‐tone and two‐tone measurements with fixed frequency separation were used to extract the behavioural model of an amplifier that captured baseband effects . Therefore, the resulting model might not be accurate enough to match measured spectral regrowth within 1 dB when the model is used in conjunction with a digitally modulated signal.…”

Section: Enhanced Multi‐slice Model: Architecture and Extractionmentioning

confidence: 99%

“…At the end of the simulation, the result is scaled back up to the original RF. Section presents a modified version of the basic multi‐slice model along with details of the extraction procedure for its constituent blocks. This model is employed in the time‐domain using carrier downconversion, transient simulation and finally carrier upconversion.…”

Section: Introductionmentioning

confidence: 99%

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Behavioural modelling of amplifier asymmetry in the time domain

Jang

Kriplani

Steer

2012

Int J Numerical Modelling

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SUMMARY Power amplifier asymmetry is captured by a behavioural model that contains multiple slices representing the amplifier's nonlinearity and long‐term, that is low frequency, memory. The simulation is performed entirely in the time domain, and the expense associated with performing a purely transient radio frequency (RF) simulation is circumvented by scaling down the carrier frequency by two orders of magnitude. This leads to a manageable transient simulation with results scaling back to the original carrier frequency. The model is empirical and can be easily implemented in any general purpose circuit simulation environment. The baseband portion of the model parameters was extracted and the simulation result was compared with measurement, thereby demonstrating that a nonlinear and accurate transient analysis routine can be effectively employed to capture memory‐related RF power amplifier phenomena. Copyright © 2012 John Wiley & Sons, Ltd.

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Section: Enhanced Multi‐slice Model: Architecture and Extractionmentioning

confidence: 99%

Section: Enhanced Multi‐slice Model: Architecture and Extractionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Behavioural modelling of amplifier asymmetry in the time domain

Jang

Kriplani

Steer

2012

Int J Numerical Modelling

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“…이러한 다층 슬라이스 모델을 기반으로 IMD 비대칭 특성을 설명하기 위해 이층 슬라이스 모델 (two-slice behavioral model)이 제시된 바 있다 [3]. 또한 이 층 슬라이스 모델 내부의 기수(odd-order) 다항식과 우수 (even-order) 다항식의 계수들을 실제 전력 증폭기로부터 측정하여 추출하고 이를 근사화 하는 방법 또한 제시되었다 [4]. 최근에는 이러한 결과를 이용하여 전력 증폭기의 멀티 톤 입력에 대한 응답 특성을 유도해내는 것으로 확대된 바 있다 [5].…”

Section: 서 론 무선 통신 시스템의 송신기에서 사용되고 있는 전력 증폭 기의 비선형 특성을 분석하는 것은 전력 증폭기unclassified

Analysis of Power Amplifier Nonlinear Response Based on Practical Circuit Parameters

Park¹,

Kim²

2012

The Transactions of The Korean Institute of Electrical Engineer

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-In this paper, a novel analysis on the nonlinear response of a power amplifier (PA) with the intermodulation distortion (IMD) asymmetry is proposed based on the mutislice behavioral model. The coefficients of the odd-order and even-order polynomial of that model are represented with the PA practical circuit parameters such as intercept points, gain and amplitudes of excitation inputs. We also develop the analytic expressions to distinguish baseband frequency effect from second harmonic effect on the IMD asymmetry. We also validate the derived analytic expressions through measurements.

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“…A deep study of this type of scheme can be found in [11,12]. Some authors have represented these effects using some special forms of behavioral models [13], which somehow represent the mechanism that were already described. The proposed model from [13] is presented in Figure 2.…”

Section: B Nonlinearity Presenting Memorymentioning

confidence: 99%

Characterization of SNDR degradation in nonlinear wireless transmitters

Santos

Carvalho

Gard

2009

Int J RF and Microwave Comp Aid Eng

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This article presents a measurement strategy and a characterization bench for the evaluation of Signal to Noise and Distortion Ratio (SNDR) in nonlinear wireless systems when in presence of memory effects. This measurement proposal will be combined with a closed analysis of the nonlinear mechanisms appearing in communication systems presenting memory. The analysis of this memory mechanism, when the system is excited by complex modulated signals with different statistics, will be a useful tool for design engineers to evaluate the degradation of SNDR in nonlinear wireless systems. Finally, the proposed measurement approach will be applied to a CDMA communication system, by evaluating carefully the SNDR of that system.

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Capturing asymmetry in distortion of an RF system using a multislice behavioral model

Cited by 8 publications

References 8 publications

Behavioural modelling of amplifier asymmetry in the time domain

Behavioural modelling of amplifier asymmetry in the time domain

Analysis of Power Amplifier Nonlinear Response Based on Practical Circuit Parameters

Characterization of SNDR degradation in nonlinear wireless transmitters

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