Spectral Effects of Discrete-Time Amplitude Levels in Digital-Intensive Wideband Radio Transmitters

Mikko Martelius; Kari Stadius; Jerry Lemberg; Enrico Roverato; Marko Kosunen; Jussi Ryynänen; Lauri Anttila; Mikko Valkama

doi:10.1109/ISCAS.2018.8350970

Spectral Effects of Discrete-Time Amplitude Levels in Digital-Intensive Wideband Radio Transmitters

Mikko Martelius
, Kari Stadius
, Jerry Lemberg
, Enrico Roverato
, Marko Kosunen
, Jussi Ryynänen
, Lauri Anttila
, Mikko Valkama

Tutkimustuotos: Konferenssiartikkeli › Tieteellinen › vertaisarvioitu

3 Sitaatiot (Scopus)

18 Lataukset (Pure)

Abstrakti

This paper examines one source of spectral degradation in polar and multilevel outphasing transmitters. The degradation is caused by the amplitude signal appearing at the transmitter output as a baseband component, in addition to the desired RF signal. This baseband component contains sampling images and quantization noise across the spectrum. Thus, it adds noise at the signal band where it cannot be filtered and limits the achievable ACLR, particularly in wideband LTE and 5G systems. We analyze the origin of this phenomenon and related effects of system and signal parameters, and propose three design solutions for eliminating or alleviating the problem. Our analysis and simulations demonstrate that using a voltage-subtracting power combiner cancels the described degradation, potentially leading to significant improvement in spectral performance.

Alkuperäiskieli	Englanti
Otsikko	2018 IEEE International Symposium on Circuits and Systems, ISCAS 2018
Kustantaja	IEEE
ISBN (elektroninen)	9781538648810
DOI - pysyväislinkit	https://doi.org/10.1109/ISCAS.2018.8350970
Tila	Julkaistu - 26 huhtik. 2018
OKM-julkaisutyyppi	A4 Artikkeli konferenssijulkaisussa
Tapahtuma	IEEE International Symposium on Circuits and Systems - Florence, Italia Kesto: 27 toukok. 2018 → 30 toukok. 2018

Julkaisusarja

Nimi
ISSN (elektroninen)	2379-447X

Conference

Conference	IEEE International Symposium on Circuits and Systems
Maa/Alue	Italia
Kaupunki	Florence
Ajanjakso	27/05/18 → 30/05/18

Rahoitus

This work is supported by Nokia, the Finnish Funding Agency for Technology and Innovation, and the Academy of Finland.

Julkaisufoorumi-taso

Jufo-taso 1

!!ASJC Scopus subject areas

Electrical and Electronic Engineering

Pääsy asiakirjaan

10.1109/ISCAS.2018.8350970

Spectral Effects of Discrete-Time Amplitude Levels 2018
This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
Accepted author manuscript, 558 KB

http://urn.fi/URN:NBN:fi:tuni-202002041829

Siteeraa tätä

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title = "Spectral Effects of Discrete-Time Amplitude Levels in Digital-Intensive Wideband Radio Transmitters",

abstract = "This paper examines one source of spectral degradation in polar and multilevel outphasing transmitters. The degradation is caused by the amplitude signal appearing at the transmitter output as a baseband component, in addition to the desired RF signal. This baseband component contains sampling images and quantization noise across the spectrum. Thus, it adds noise at the signal band where it cannot be filtered and limits the achievable ACLR, particularly in wideband LTE and 5G systems. We analyze the origin of this phenomenon and related effects of system and signal parameters, and propose three design solutions for eliminating or alleviating the problem. Our analysis and simulations demonstrate that using a voltage-subtracting power combiner cancels the described degradation, potentially leading to significant improvement in spectral performance.",

author = "Mikko Martelius and Kari Stadius and Jerry Lemberg and Enrico Roverato and Marko Kosunen and Jussi Ryyn{\"a}nen and Lauri Anttila and Mikko Valkama",

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Martelius, M, Stadius, K, Lemberg, J, Roverato, E, Kosunen, M, Ryynänen, J, Anttila, L & Valkama, M 2018, Spectral Effects of Discrete-Time Amplitude Levels in Digital-Intensive Wideband Radio Transmitters. julkaisussa 2018 IEEE International Symposium on Circuits and Systems, ISCAS 2018., 8350970, IEEE, IEEE International Symposium on Circuits and Systems, Florence, Italia, 27/05/18. https://doi.org/10.1109/ISCAS.2018.8350970

TY - GEN

T1 - Spectral Effects of Discrete-Time Amplitude Levels in Digital-Intensive Wideband Radio Transmitters

AU - Martelius, Mikko

AU - Stadius, Kari

AU - Lemberg, Jerry

AU - Roverato, Enrico

AU - Kosunen, Marko

AU - Ryynänen, Jussi

AU - Anttila, Lauri

AU - Valkama, Mikko

N1 - jufoid=86927

PY - 2018/4/26

Y1 - 2018/4/26

N2 - This paper examines one source of spectral degradation in polar and multilevel outphasing transmitters. The degradation is caused by the amplitude signal appearing at the transmitter output as a baseband component, in addition to the desired RF signal. This baseband component contains sampling images and quantization noise across the spectrum. Thus, it adds noise at the signal band where it cannot be filtered and limits the achievable ACLR, particularly in wideband LTE and 5G systems. We analyze the origin of this phenomenon and related effects of system and signal parameters, and propose three design solutions for eliminating or alleviating the problem. Our analysis and simulations demonstrate that using a voltage-subtracting power combiner cancels the described degradation, potentially leading to significant improvement in spectral performance.

AB - This paper examines one source of spectral degradation in polar and multilevel outphasing transmitters. The degradation is caused by the amplitude signal appearing at the transmitter output as a baseband component, in addition to the desired RF signal. This baseband component contains sampling images and quantization noise across the spectrum. Thus, it adds noise at the signal band where it cannot be filtered and limits the achievable ACLR, particularly in wideband LTE and 5G systems. We analyze the origin of this phenomenon and related effects of system and signal parameters, and propose three design solutions for eliminating or alleviating the problem. Our analysis and simulations demonstrate that using a voltage-subtracting power combiner cancels the described degradation, potentially leading to significant improvement in spectral performance.

U2 - 10.1109/ISCAS.2018.8350970

DO - 10.1109/ISCAS.2018.8350970

M3 - Conference contribution

AN - SCOPUS:85057074078

BT - 2018 IEEE International Symposium on Circuits and Systems, ISCAS 2018

PB - IEEE

T2 - IEEE International Symposium on Circuits and Systems

Y2 - 27 May 2018 through 30 May 2018

ER -

Spectral Effects of Discrete-Time Amplitude Levels in Digital-Intensive Wideband Radio Transmitters

Abstrakti

Julkaisusarja

Conference

Rahoitus

Julkaisufoorumi-taso

!!ASJC Scopus subject areas

Pääsy asiakirjaan

Sormenjälki

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