New modified saleh models for memoryless nonlinear power amplifier behavioural modelling

O’Dróma, Máirtín; Meza, Serban; Lei, Yiming

doi:10.1109/lcomm.2009.090222

Cited by 49 publications

(16 citation statements)

References 2 publications

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“…Saleh's model [31] was used to represent the TWT amplifier itself, which is a form of a rational function; and, it is expected that the use of another rational function should easily be able to model DPD. A modified Saleh's model was also proposed for SSPAs, but it did not compensate for memory effects and it targeted the behavioral modeling of the PA [32]. Considering the importance of memory effects, a behavioral model based on a rational function was proposed in [33], where memory effects were included as time delay taps in a complex-term numerator and absolute-term denominator.…”

Section: ) a Commercial Laterally Diffused Mos (Ldmos)mentioning

confidence: 99%

Generalized Rational Functions for Reduced-Complexity Behavioral Modeling and Digital Predistortion of Broadband Wireless Transmitters

Rawat

Ghannouchi

et al. 2014

IEEE Trans. Instrum. Meas.

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In this paper, we present and analyze rationalfunction-based digital predistortion (DPD) of transmitters for broadband applications where system noise and prominent memory effects contribute to the overall nonlinearity of the system. The performance is reported for simulation and measured results for gallium nitride (GaN)-based class-AB and laterally diffused MOS (LDMOS)-based Doherty power amplifiers (PAs) using three different wideband code division multiple access signals with peak-to-average-power ratios of around 10 dB. The performance of the proposed model, in terms of normalized meansquare error, adjacent channel power ratio, matrix condition number, and coefficient dispersion, is compared against those of a memory polynomial (MP) model and a previously proposed rational-function-based model. It is shown by simulation and measurement that the previously proposed absolute-term denominator rational functions have limitations in the inverse modeling needed for DPD. A new variation of the rational function is proposed to alleviate this limitation. Depending on the type of PA and signals, a floating-point operation reduction of 8%-38% is reported as compared with a low-complexity MP model.

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Section: ) a Commercial Laterally Diffused Mos (Ldmos)mentioning

confidence: 99%

Generalized Rational Functions for Reduced-Complexity Behavioral Modeling and Digital Predistortion of Broadband Wireless Transmitters

Rawat

Ghannouchi

et al. 2014

IEEE Trans. Instrum. Meas.

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“…In comparison to the formula in [7], we have ignored any scaling factor of the output as we are only interested in the distortion caused by the HPA. For the other exponents present in [7], we chose the values of the classical AM-AM Saleh model [6]. Moreover, since we are interested in a behavioral analysis, it is handy to write the input envelope as a function of the input saturation power:…”

Section: High Power Amplifier Modelmentioning

confidence: 99%

Multi-service data dissemination for space-based augmentation systems

Vergara

Antreich

Liva

et al. 2013

2013 IEEE Aerospace Conference

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New SBAS (Satellite Based Augmentation System) signals could include the provision of new additional services alongside the defined SBAS L1/L5 aeronautical service [1], if additional power becomes available. In this paper we present a solution that efficiently makes use of the additional available power in order to increase the overall data rate of a new multiservice SBAS signal. These new SBAS signals will be backward compatible. The high power efficiency of the proposed scheme is guaranteed by a variation of the interplex scheme that is characterized by a variable envelope signal constellation. A coding scheme based on generalized low density parity check (LDPC) codes ensures that service requirements can be met with a lower SNR (Signal-to-Noise Ratio).

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“…In fact, the use of rational functions in this field can be reduced to the Saleh model [1] (and its extended versions [2], [3]). In this paper we consider a general rational model that is defined by where x(n) and y(n) are the time-domain nth samples of the PA input and output complex envelopes, respectively.…”

Section: The Rational Modelmentioning

confidence: 99%

Rational function-based model with memory for power amplifier behavioral modeling

Cunha

Lavrador

Lima

et al. 2011

2011 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits

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Polynomials have been extensively used to model power amplifier (PA) behavior because of their linearity in the parameters, which eases their identification. However, these models are inherently local, being unable to extrapolate the PA behavior for conditions not considered during model extraction. This paper presents a model which, based on the ratio of two polynomials, avoids the catastrophic error degradation of polynomials (being thus suitable for large-signal behavior prediction) but still can be extracted using linear regression techniques. This model is tested with measured data from a class-AB PA.

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New modified saleh models for memoryless nonlinear power amplifier behavioural modelling

Cited by 49 publications

References 2 publications

Generalized Rational Functions for Reduced-Complexity Behavioral Modeling and Digital Predistortion of Broadband Wireless Transmitters

Generalized Rational Functions for Reduced-Complexity Behavioral Modeling and Digital Predistortion of Broadband Wireless Transmitters

Multi-service data dissemination for space-based augmentation systems

Rational function-based model with memory for power amplifier behavioral modeling

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