On the Impact of Redundant Subcarrier Energy Optimization in UW-OFDM

Christian Hofbauer; Mario Huemer; Johannes B. Huber

doi:10.1109/ICSPCS.2010.5709697

On the Impact of Redundant Subcarrier Energy Optimization in UW-OFDM

Christian Hofbauer, Mario Huemer, Johannes B. Huber

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

Abstract

Unique word - orthogonal frequency division multiplexing (UW-OFDM) is a novel OFDM concept that uses deterministic sequences, which we call unique words, as guard intervals instead of the conventional cyclic prefixes. Since unique words represent known sequences, they can advantageously be used for synchronization, channel estimation, but also for improving the bit error ratio (BER) behavior of a system. These UWs are created by appropriately loading so-called redundant subcarriers. In this paper, we investigate methods to improve the BER behavior of UW-OFDM by increasing the number of redundant subcarriers (while keeping the length of the UW constant). This gain in the BER performance comes with an increase of the redundancy part and thus with a decrease of the data rate. As such, we present methods to vary the coding rate in UW-OFDM. We present results for the additive white Gaussian noise (AWGN) channel as well as for indoor multipath environments to highlight the advantages of the proposed methods.

Original language	English
Title of host publication	2010 4th International Conference on Signal Processing and Communication Systems
Publisher	IEEE Computer Society
Pages	1-6
Number of pages	6
ISBN (Print)	978-1-4244-7906-1
DOIs	https://doi.org/10.1109/ICSPCS.2010.5709697
Publication status	Published - 15 Dec 2010
Externally published	Yes
Event	2010 4th International Conference on Signal Processing and Communication Systems - Gold Coast, QLD, Australia Duration: 13 Dec 2010 → 15 Dec 2010

Conference

Conference	2010 4th International Conference on Signal Processing and Communication Systems
Period	13/12/10 → 15/12/10

Keywords

OFDM
Frequency domain analysis
Bit error rate
Smoothing methods
Encoding
AWGN

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10.1109/ICSPCS.2010.5709697

https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5709697

Cite this

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title = "On the Impact of Redundant Subcarrier Energy Optimization in UW-OFDM",

abstract = "Unique word - orthogonal frequency division multiplexing (UW-OFDM) is a novel OFDM concept that uses deterministic sequences, which we call unique words, as guard intervals instead of the conventional cyclic prefixes. Since unique words represent known sequences, they can advantageously be used for synchronization, channel estimation, but also for improving the bit error ratio (BER) behavior of a system. These UWs are created by appropriately loading so-called redundant subcarriers. In this paper, we investigate methods to improve the BER behavior of UW-OFDM by increasing the number of redundant subcarriers (while keeping the length of the UW constant). This gain in the BER performance comes with an increase of the redundancy part and thus with a decrease of the data rate. As such, we present methods to vary the coding rate in UW-OFDM. We present results for the additive white Gaussian noise (AWGN) channel as well as for indoor multipath environments to highlight the advantages of the proposed methods.",

keywords = "OFDM, Frequency domain analysis, Bit error rate, Smoothing methods, Encoding, AWGN",

author = "Christian Hofbauer and Mario Huemer and Huber, {Johannes B.}",

year = "2010",

month = dec,

day = "15",

doi = "10.1109/ICSPCS.2010.5709697",

language = "English",

isbn = "978-1-4244-7906-1",

pages = "1--6",

booktitle = "2010 4th International Conference on Signal Processing and Communication Systems",

publisher = "IEEE Computer Society",

address = "United States",

note = "2010 4th International Conference on Signal Processing and Communication Systems ; Conference date: 13-12-2010 Through 15-12-2010",

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Hofbauer, C, Huemer, M & Huber, JB 2010, On the Impact of Redundant Subcarrier Energy Optimization in UW-OFDM. in 2010 4th International Conference on Signal Processing and Communication Systems., 5709697, IEEE Computer Society, pp. 1-6, 2010 4th International Conference on Signal Processing and Communication Systems, 13/12/10. https://doi.org/10.1109/ICSPCS.2010.5709697

TY - GEN

T1 - On the Impact of Redundant Subcarrier Energy Optimization in UW-OFDM

AU - Hofbauer, Christian

AU - Huemer, Mario

AU - Huber, Johannes B.

PY - 2010/12/15

Y1 - 2010/12/15

N2 - Unique word - orthogonal frequency division multiplexing (UW-OFDM) is a novel OFDM concept that uses deterministic sequences, which we call unique words, as guard intervals instead of the conventional cyclic prefixes. Since unique words represent known sequences, they can advantageously be used for synchronization, channel estimation, but also for improving the bit error ratio (BER) behavior of a system. These UWs are created by appropriately loading so-called redundant subcarriers. In this paper, we investigate methods to improve the BER behavior of UW-OFDM by increasing the number of redundant subcarriers (while keeping the length of the UW constant). This gain in the BER performance comes with an increase of the redundancy part and thus with a decrease of the data rate. As such, we present methods to vary the coding rate in UW-OFDM. We present results for the additive white Gaussian noise (AWGN) channel as well as for indoor multipath environments to highlight the advantages of the proposed methods.

AB - Unique word - orthogonal frequency division multiplexing (UW-OFDM) is a novel OFDM concept that uses deterministic sequences, which we call unique words, as guard intervals instead of the conventional cyclic prefixes. Since unique words represent known sequences, they can advantageously be used for synchronization, channel estimation, but also for improving the bit error ratio (BER) behavior of a system. These UWs are created by appropriately loading so-called redundant subcarriers. In this paper, we investigate methods to improve the BER behavior of UW-OFDM by increasing the number of redundant subcarriers (while keeping the length of the UW constant). This gain in the BER performance comes with an increase of the redundancy part and thus with a decrease of the data rate. As such, we present methods to vary the coding rate in UW-OFDM. We present results for the additive white Gaussian noise (AWGN) channel as well as for indoor multipath environments to highlight the advantages of the proposed methods.

KW - OFDM

KW - Frequency domain analysis

KW - Bit error rate

KW - Smoothing methods

KW - Encoding

KW - AWGN

UR - https://ieeexplore.ieee.org/document/5709697/

U2 - 10.1109/ICSPCS.2010.5709697

DO - 10.1109/ICSPCS.2010.5709697

M3 - Conference Paper

SN - 978-1-4244-7906-1

SP - 1

EP - 6

BT - 2010 4th International Conference on Signal Processing and Communication Systems

PB - IEEE Computer Society

T2 - 2010 4th International Conference on Signal Processing and Communication Systems

Y2 - 13 December 2010 through 15 December 2010

ER -

On the Impact of Redundant Subcarrier Energy Optimization in UW-OFDM

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