Hierarchical-Table-Based Model for All-Digital RF Transmitters

Leder, Norbert; Pichler, Bernhard; Faseth, Thomas; Ruotsalainen, Henri; Arthaber, Holger

doi:10.1109/tmtt.2016.2630068

Cited by 5 publications

(2 citation statements)

References 21 publications

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“…To achieve this, several model structures have been proposed in the literature including memory polynomial based single-box [6]- [8], and multi-box models [9]- [11], Volterra series based models [12], [13], and look-up table (LUT) based models [14]- [16].…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Look-Up-Tables Based Behavioral Model for Dynamic Nonlinear Power Amplifiers

2020

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A new look-up table based behavioral model for dynamic nonlinear power amplifiers is proposed. This model labelled as hybrid look-up tables model is based on the combination of a memoryless look-up table sub-model and a nested look-up tables one. It is demonstrated that the proposed model circumvents the computational complexity associated with the parameters identification in analytically defined behavioral models. Moreover, the proposed model reduces the size of the standalone nested look-up tables model by approximately 80% while maintaining its accuracy. Furthermore, a novel slew-rate based trimming and indexing technique to reduce the nested look-up tables model size is developed and corroborated experimentally. Additionally, the two-box structure of the hybrid look-up tables model makes it suitable for bandwidth scalability. Experimental validation using LTE-advanced test signals with up to 120MHz bandwidth demonstrates the ability of the proposed hybrid look-up tables model to be bandwidth scalable with less than 0.5dB degradation in the normalized mean-squared error. INDEX TERMS Behavioral modeling, dynamic distortion, look-up table, memory effects, nonlinear distortions, power amplifier (PA).

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Section: Introductionmentioning

confidence: 99%

“…However, these models result in a very large size, making them unattractive. In [16], a table based model was proposed for all-digital RF transmitters. The identification of this model requires the initialization of the LUT using all possible combinations of the input signal for the considered memory depth of the device under test.…”

Section: Introductionmentioning

confidence: 99%