DSP oriented implementation of a feedforward power amplifier linearizer

Sascha Burglechner; Ali Shahed Hagh Ghadam; Andreas Springer; Mikko Valkama; Gernot Hueber

doi:10.1109/ISCAS.2009.5118115

DSP oriented implementation of a feedforward power amplifier linearizer

Sascha Burglechner, Ali Shahed Hagh Ghadam, Andreas Springer, Mikko Valkama, Gernot Hueber

Research output: Conference proceeding/Chapter in Book/Report/ › Conference Paper › peer-review

Abstract

In this contribution we introduce a new digital signal processing (DSP)-oriented implementation of a feedforward linearizer. The intermodulation distortion (IMD) signal is regenerated entirely in the digital baseband which gives better control over the linearization process and also improves the efficiency of the overall amplifier. A new scheme to estimate the parameters of the proposed feedforward linearizer is presented which decouples the parameters of the signal and error cancellation loop. We have verified the new DSP oriented feedforward linearizer by means of simulations in the presence of component impairments like, e.g., IQ mismatch. Initial measurements results in a laboratory setup show a reduction of the adjacent channel power of approximately 15 to 20 dB.

Original language	English
Title of host publication	2009 IEEE International Symposium on Circuits and Systems
Publisher	IEEE Computer Society
Pages	1755-1758
Number of pages	4
ISBN (Print)	978-1-4244-3828-0
DOIs	https://doi.org/10.1109/ISCAS.2009.5118115
Publication status	Published - 27 May 2009
Externally published	Yes
Event	2009 IEEE International Symposium on Circuits and Systems - Taipei, Taiwan Duration: 24 May 2009 → 27 May 2009

Conference

Conference	2009 IEEE International Symposium on Circuits and Systems
Period	24/05/09 → 27/05/09

Keywords

Digital signal processing
Power amplifiers
Baseband
Radio frequency
Power harmonic filters
Intermodulation distortion
Radiofrequency amplifiers
Virtual manufacturing
Power engineering and energy
Wideband

Access to Document

10.1109/ISCAS.2009.5118115

https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5118115

Cite this

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title = "DSP oriented implementation of a feedforward power amplifier linearizer",

abstract = "In this contribution we introduce a new digital signal processing (DSP)-oriented implementation of a feedforward linearizer. The intermodulation distortion (IMD) signal is regenerated entirely in the digital baseband which gives better control over the linearization process and also improves the efficiency of the overall amplifier. A new scheme to estimate the parameters of the proposed feedforward linearizer is presented which decouples the parameters of the signal and error cancellation loop. We have verified the new DSP oriented feedforward linearizer by means of simulations in the presence of component impairments like, e.g., IQ mismatch. Initial measurements results in a laboratory setup show a reduction of the adjacent channel power of approximately 15 to 20 dB.",

keywords = "Digital signal processing, Power amplifiers, Baseband, Radio frequency, Power harmonic filters, Intermodulation distortion, Radiofrequency amplifiers, Virtual manufacturing, Power engineering and energy, Wideband",

author = "Sascha Burglechner and Ghadam, {Ali Shahed Hagh} and Andreas Springer and Mikko Valkama and Gernot Hueber",

year = "2009",

month = may,

day = "27",

doi = "10.1109/ISCAS.2009.5118115",

language = "English",

isbn = "978-1-4244-3828-0",

pages = "1755--1758",

booktitle = "2009 IEEE International Symposium on Circuits and Systems",

publisher = "IEEE Computer Society",

address = "United States",

note = "2009 IEEE International Symposium on Circuits and Systems ; Conference date: 24-05-2009 Through 27-05-2009",

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T1 - DSP oriented implementation of a feedforward power amplifier linearizer

AU - Burglechner, Sascha

AU - Ghadam, Ali Shahed Hagh

AU - Springer, Andreas

AU - Valkama, Mikko

AU - Hueber, Gernot

PY - 2009/5/27

Y1 - 2009/5/27

N2 - In this contribution we introduce a new digital signal processing (DSP)-oriented implementation of a feedforward linearizer. The intermodulation distortion (IMD) signal is regenerated entirely in the digital baseband which gives better control over the linearization process and also improves the efficiency of the overall amplifier. A new scheme to estimate the parameters of the proposed feedforward linearizer is presented which decouples the parameters of the signal and error cancellation loop. We have verified the new DSP oriented feedforward linearizer by means of simulations in the presence of component impairments like, e.g., IQ mismatch. Initial measurements results in a laboratory setup show a reduction of the adjacent channel power of approximately 15 to 20 dB.

AB - In this contribution we introduce a new digital signal processing (DSP)-oriented implementation of a feedforward linearizer. The intermodulation distortion (IMD) signal is regenerated entirely in the digital baseband which gives better control over the linearization process and also improves the efficiency of the overall amplifier. A new scheme to estimate the parameters of the proposed feedforward linearizer is presented which decouples the parameters of the signal and error cancellation loop. We have verified the new DSP oriented feedforward linearizer by means of simulations in the presence of component impairments like, e.g., IQ mismatch. Initial measurements results in a laboratory setup show a reduction of the adjacent channel power of approximately 15 to 20 dB.

KW - Digital signal processing

KW - Power amplifiers

KW - Baseband

KW - Radio frequency

KW - Power harmonic filters

KW - Intermodulation distortion

KW - Radiofrequency amplifiers

KW - Virtual manufacturing

KW - Power engineering and energy

KW - Wideband

UR - https://ieeexplore.ieee.org/document/5118115/

U2 - 10.1109/ISCAS.2009.5118115

DO - 10.1109/ISCAS.2009.5118115

M3 - Conference Paper

SN - 978-1-4244-3828-0

SP - 1755

EP - 1758

BT - 2009 IEEE International Symposium on Circuits and Systems

PB - IEEE Computer Society

T2 - 2009 IEEE International Symposium on Circuits and Systems

Y2 - 24 May 2009 through 27 May 2009

ER -

DSP oriented implementation of a feedforward power amplifier linearizer

Abstract

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Keywords

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