A Flexible Dual-Inflection Point Rf Predistortion Linearizer for Microwave Power Amplifiers

Hashmi, Mohammad S.; Rogojan, Zaharia S.; Ghannouchi, Fadhel M.

doi:10.2528/pierc10012609

Cited by 19 publications

(13 citation statements)

References 18 publications

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“…R and 6 R denote the dynamic resistances of the Schottky diodes. 1 C , 2 C , 3 C , 4 C , 5 C and 6 C denote the junction capacitances of the Schottky diodes.…”

Section: Equivalent Circuit Of Linearizermentioning

confidence: 99%

Design and Analysis of High Gain Diode Pre-Distortion Linearizer for TWTA

Misra¹,

Sarkar²,

Gupta³

2014

IJWMN

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“…R and 6 R denote the dynamic resistances of the Schottky diodes. 1 C , 2 C , 3 C , 4 C , 5 C and 6 C denote the junction capacitances of the Schottky diodes.…”

Section: Equivalent Circuit Of Linearizermentioning

confidence: 99%

Design and Analysis of High Gain Diode Pre-Distortion Linearizer for TWTA

Misra¹,

Sarkar²,

Gupta³

2014

IJWMN

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“…Therefore, the third-order intermodulation (IM3) needs to be suppressed because it is very difficult to filter out these signals from the carrier signals. Several linearization techniques of optical transmitter such as, feed-forward [5][6][7], dual-parallel [8] and predistortion [9][10][11][12][13][14] method have been considered.…”

Section: Introductionmentioning

confidence: 99%

Opto-electrical predistortion method using nonlinearity of schottky diode for radio-over-fiber systems

Son

Kim

et al. 2013

SPIE Proceedings

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In this paper, we propose a simple and efficient predistortion method using schottky diodes to compensate the nonlinearity of RoF systems. L-I curve in LD is compared with I-V curve in schottky diode and the nonlinear characteristics are analyzed. The predistortion circuit has been designed with two paths. One path is the nonlinearity generation circuit with schottky diode, while the other path has only a time delay. Then, these two paths are recombined to suppress the IMD3 (3 rd inter -modulation distortion) of LD. Experimental results show that the enhancements of about 26 dBc in the IMD3 and about 8.5 dB in the SFDR are achieved at 2.4 GHz.

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“…One of the most and cost effective linearization techniques to PA nonlinearity is digital predistortion (DPD) [1,2], which has many advantages such as high fidelity, efficiency, and easy realization of adaptive processing [3][4][5]. Moreover, the final purpose of realizing PA linearization digital predistortion needs behavioral modeling precisely, for which Volterra series comes to light.…”

Section: Introductionmentioning

confidence: 99%

An Accurate Complexity-Reduced Simplified Volterra Series for Rf Power Amplifiers

Sun¹,

Yu²,

Liu³

et al. 2014

PIER C

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Abstract-An accurate complexity-reduced simplified Volterra (ACR-SV) series is introduced for RF power amplifiers (PAs). Based on the conventional simplified Volterra (SV) series, it takes memoryless nonlinearity and memory effect into consideration separately, while connected with a nonlinear memory effect (NME) in order to increase accuracy of the model. The proposed ACR-SV model is assessed using a GaN Class-F PA driven by two modulated signals (a WCDMA 1001 signal and a single carrier 16QAM signal with 40 MHz band width). The experimental results in forward modeling and DPD application demonstrate that the proposed ACR-SV model outperforms the memory polynomial (MP) model, the augmented complexity-reduced generalized memory polynomial (ACR-GMP), and the SV model. Compared with the MP model, the ACR-SV model shows a normalized mean square error (NMSE) improvement of 2.61 dB in forward modeling, average adjacent channel power ratio (ACPR) improvement of 3.7/4.2 dB in the DPD application with less 13% number of model coefficients. In comparison with the ACR-GMP model, the ACR-SV model shows NMSE improvement of 1.39 dB, ACPR improvement of 0.7/0.6 dB with comparable number of model coefficients. In contrast with the SV model, the ACR-SV model achieves similar model accuracy, but reduces approximately 53% of coefficients.

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A Flexible Dual-Inflection Point Rf Predistortion Linearizer for Microwave Power Amplifiers

Cited by 19 publications

References 18 publications

Design and Analysis of High Gain Diode Pre-Distortion Linearizer for TWTA

Design and Analysis of High Gain Diode Pre-Distortion Linearizer for TWTA

Opto-electrical predistortion method using nonlinearity of schottky diode for radio-over-fiber systems

An Accurate Complexity-Reduced Simplified Volterra Series for Rf Power Amplifiers

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