Modeling of an IQ RF-DAC with error-free LO-switching

Damir Hamidovic; Jovan Markovic; Tobias Buckel; Peter Preyler; Mario Huemer; Andreas Springer

doi:10.1109/ISCAS.2018.8351573

Modeling of an IQ RF-DAC with error-free LO-switching

Damir Hamidovic
, Jovan Markovic
, Tobias Buckel
, Peter Preyler
, Mario Huemer
, Andreas Springer

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

Abstract

In this paper a state-space approach for modeling radio-frequency digital-to-analog-converters is presented. We explain the root cause of the sign-change error appearing in RF-DAC architectures with local oscillator (LO) switching and present its impact in time domain and on the spectrum of the output RF signal. The main contribution of this paper is a solution for the removal of the sign-change error. The solution is implemented in a linear state-space model, considering static nonlinearities of the switched-capacitor power amplifier cells. We demonstrate the feasibility of our approach by simulation results for LTE5, LTE10 and LTE20 signals and show that the out-of-band noise contribution of the sign-change error is completely removed. Additionally, the impact of static nonlinearities on the system is investigated.

Original language	English
Title of host publication	2018 IEEE International Symposium on Circuits and Systems (ISCAS)
Publisher	IEEE
Pages	1-5
Number of pages	5
ISBN (Electronic)	9781538648810
ISBN (Print)	978-1-5386-4881-0
DOIs	https://doi.org/10.1109/ISCAS.2018.8351573
Publication status	Published - May 2018

Fields of science

202019 High frequency engineering
202038 Telecommunications
202 Electrical Engineering, Electronics, Information Engineering
202030 Communication engineering
202037 Signal processing

JKU Focus areas

Mechatronics and Information Processing

Access to Document

10.1109/ISCAS.2018.8351573

Cite this

@inproceedings{f1b62e21020d42048f0576467175eb48,

title = "Modeling of an IQ RF-DAC with error-free LO-switching",

abstract = "In this paper a state-space approach for modeling radio-frequency digital-to-analog-converters is presented. We explain the root cause of the sign-change error appearing in RF-DAC architectures with local oscillator (LO) switching and present its impact in time domain and on the spectrum of the output RF signal. The main contribution of this paper is a solution for the removal of the sign-change error. The solution is implemented in a linear state-space model, considering static nonlinearities of the switched-capacitor power amplifier cells. We demonstrate the feasibility of our approach by simulation results for LTE5, LTE10 and LTE20 signals and show that the out-of-band noise contribution of the sign-change error is completely removed. Additionally, the impact of static nonlinearities on the system is investigated.",

author = "Damir Hamidovic and Jovan Markovic and Tobias Buckel and Peter Preyler and Mario Huemer and Andreas Springer",

year = "2018",

month = may,

doi = "10.1109/ISCAS.2018.8351573",

language = "English",

isbn = "978-1-5386-4881-0",

pages = "1--5",

booktitle = "2018 IEEE International Symposium on Circuits and Systems (ISCAS)",

publisher = "IEEE",

}

TY - GEN

T1 - Modeling of an IQ RF-DAC with error-free LO-switching

AU - Hamidovic, Damir

AU - Markovic, Jovan

AU - Buckel, Tobias

AU - Preyler, Peter

AU - Huemer, Mario

AU - Springer, Andreas

PY - 2018/5

Y1 - 2018/5

N2 - In this paper a state-space approach for modeling radio-frequency digital-to-analog-converters is presented. We explain the root cause of the sign-change error appearing in RF-DAC architectures with local oscillator (LO) switching and present its impact in time domain and on the spectrum of the output RF signal. The main contribution of this paper is a solution for the removal of the sign-change error. The solution is implemented in a linear state-space model, considering static nonlinearities of the switched-capacitor power amplifier cells. We demonstrate the feasibility of our approach by simulation results for LTE5, LTE10 and LTE20 signals and show that the out-of-band noise contribution of the sign-change error is completely removed. Additionally, the impact of static nonlinearities on the system is investigated.

AB - In this paper a state-space approach for modeling radio-frequency digital-to-analog-converters is presented. We explain the root cause of the sign-change error appearing in RF-DAC architectures with local oscillator (LO) switching and present its impact in time domain and on the spectrum of the output RF signal. The main contribution of this paper is a solution for the removal of the sign-change error. The solution is implemented in a linear state-space model, considering static nonlinearities of the switched-capacitor power amplifier cells. We demonstrate the feasibility of our approach by simulation results for LTE5, LTE10 and LTE20 signals and show that the out-of-band noise contribution of the sign-change error is completely removed. Additionally, the impact of static nonlinearities on the system is investigated.

UR - https://ieeexplore.ieee.org/document/8351573

U2 - 10.1109/ISCAS.2018.8351573

DO - 10.1109/ISCAS.2018.8351573

M3 - Conference proceedings

SN - 978-1-5386-4881-0

SP - 1

EP - 5

BT - 2018 IEEE International Symposium on Circuits and Systems (ISCAS)

PB - IEEE

ER -

Modeling of an IQ RF-DAC with error-free LO-switching

Abstract

Fields of science

JKU Focus areas

Access to Document

Other files and links

Christian Doppler Laboratory for Digitally Assisted RF Transceivers for Future Mobile Communications

Cite this

Modeling of an IQ RF-DAC with error-free LO-switching

Abstract

Fields of science

JKU Focus areas

Access to Document

Other files and links

Projects

Christian Doppler Laboratory for Digitally Assisted RF Transceivers for Future Mobile Communications

Cite this