Another Approach to Save Energy in OFDM Systems

X. Shao; Cornelis H. Slump

doi:10.1109/ICSPCS.2010.5709669

Another Approach to Save Energy in OFDM Systems

X. Shao, Cornelis H. Slump

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

1 Citation (Scopus)

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Abstract

In this paper, we propose an energy-efficient error correction scheme to lower the power consumption of the ADCs in the OFDM system. The proposed opportunistic error correction scheme is based on resolution adaptive ADCs and fountain codes. The key idea is to reduce the dynamic range of the channel by discarding part of the channel in deep fading. Correspondingly, the power consumption in ADCs can be decreased. In our approach, each sub-carrier transports a fountain-encoded packet. The receiver only decodes fountain-encoded packets with high SNR. Others are discarded. To compensate for the discarded packets, a high order modulation is used. The new error correction layer does not require perfect channel knowledge, so it can be applied in a real system. With our approach and 16-QAM, the energy consumption in ADCs is reduced by around 73% with non-perfect channel estimation comparing to the traditional IEEE 802.11a system under the same channel conditions and throughput.

Original language	Undefined
Title of host publication	Proceedings of 4th International Conference on Signal Processing and Communication Systems, ICSPCS 2010
Place of Publication	USA
Publisher	IEEE Computer Society
Pages	1-6
Number of pages	6
ISBN (Print)	978-1-42447-907-8
DOIs	https://doi.org/10.1109/ICSPCS.2010.5709669
Publication status	Published - Dec 2010
Event	4th International Conference on Signal Processing and Communication Systems, ICSPCS 2010 - Gold Coast, Australia Duration: 13 Dec 2010 → 15 Dec 2010 Conference number: 4

Publication series

Name
Publisher	IEEE Computer Society

Conference

Conference	4th International Conference on Signal Processing and Communication Systems, ICSPCS 2010
Abbreviated title	ICSPCS
Country	Australia
City	Gold Coast
Period	13/12/10 → 15/12/10

Keywords

METIS-276154
EWI-18862
IR-76009

Access to Document

10.1109/ICSPCS.2010.5709669

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Cite this

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title = "Another Approach to Save Energy in OFDM Systems",

abstract = "In this paper, we propose an energy-efficient error correction scheme to lower the power consumption of the ADCs in the OFDM system. The proposed opportunistic error correction scheme is based on resolution adaptive ADCs and fountain codes. The key idea is to reduce the dynamic range of the channel by discarding part of the channel in deep fading. Correspondingly, the power consumption in ADCs can be decreased. In our approach, each sub-carrier transports a fountain-encoded packet. The receiver only decodes fountain-encoded packets with high SNR. Others are discarded. To compensate for the discarded packets, a high order modulation is used. The new error correction layer does not require perfect channel knowledge, so it can be applied in a real system. With our approach and 16-QAM, the energy consumption in ADCs is reduced by around 73% with non-perfect channel estimation comparing to the traditional IEEE 802.11a system under the same channel conditions and throughput.",

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Shao, X & Slump, CH 2010, Another Approach to Save Energy in OFDM Systems. in Proceedings of 4th International Conference on Signal Processing and Communication Systems, ICSPCS 2010. IEEE Computer Society, USA, pp. 1-6, 4th International Conference on Signal Processing and Communication Systems, ICSPCS 2010, Gold Coast, Australia, 13/12/10. https://doi.org/10.1109/ICSPCS.2010.5709669

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AU - Slump, Cornelis H.

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PY - 2010/12

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N2 - In this paper, we propose an energy-efficient error correction scheme to lower the power consumption of the ADCs in the OFDM system. The proposed opportunistic error correction scheme is based on resolution adaptive ADCs and fountain codes. The key idea is to reduce the dynamic range of the channel by discarding part of the channel in deep fading. Correspondingly, the power consumption in ADCs can be decreased. In our approach, each sub-carrier transports a fountain-encoded packet. The receiver only decodes fountain-encoded packets with high SNR. Others are discarded. To compensate for the discarded packets, a high order modulation is used. The new error correction layer does not require perfect channel knowledge, so it can be applied in a real system. With our approach and 16-QAM, the energy consumption in ADCs is reduced by around 73% with non-perfect channel estimation comparing to the traditional IEEE 802.11a system under the same channel conditions and throughput.

AB - In this paper, we propose an energy-efficient error correction scheme to lower the power consumption of the ADCs in the OFDM system. The proposed opportunistic error correction scheme is based on resolution adaptive ADCs and fountain codes. The key idea is to reduce the dynamic range of the channel by discarding part of the channel in deep fading. Correspondingly, the power consumption in ADCs can be decreased. In our approach, each sub-carrier transports a fountain-encoded packet. The receiver only decodes fountain-encoded packets with high SNR. Others are discarded. To compensate for the discarded packets, a high order modulation is used. The new error correction layer does not require perfect channel knowledge, so it can be applied in a real system. With our approach and 16-QAM, the energy consumption in ADCs is reduced by around 73% with non-perfect channel estimation comparing to the traditional IEEE 802.11a system under the same channel conditions and throughput.

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BT - Proceedings of 4th International Conference on Signal Processing and Communication Systems, ICSPCS 2010

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