Power Reduction of Variable Wordlength OFDM Receiver in Time-Varying Fading Channels by Monitoring Subcarrier SNRs
Summary :
Determination of wordlength is essential for designing digital circuits because the wordlength affects system performance, hardware size, and power consumption. Variable wordlength methods that a system dynamically and effectively changes the wordlength depending on surrounding environments have been studied for power reduction in wireless systems. The conventional variable wordlength methods induce communication performance degradation when compared with a floating-point representation in time-varying fading channels. This paper discusses rapid wordlength control on packet basis and proposes a new method based on monitoring subcarrier SNRs in an OFDM receiver. The proposed method can estimate signal quality accurately and can decrease the wordlength decision errors. The simulation results have indicated that the proposed method shows better PER performance compared with the conventional methods.
- Publication
- IEICE TRANSACTIONS on Fundamentals Vol.E99-A No.1 pp.330-337
- Publication Date
- 2016/01/01
- Publicized
- Online ISSN
- 1745-1337
- DOI
- 10.1587/transfun.E99.A.330
- Type of Manuscript
- PAPER
- Category
- Digital Signal Processing
Authors
Shingo YOSHIZAWA
Kitami Institute of Technology
Daichi SASAKI
Kitami Institute of Technology
Hiroshi TANIMOTO
Kitami Institute of Technology
Keyword
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Shingo YOSHIZAWA, Daichi SASAKI, Hiroshi TANIMOTO, "Power Reduction of Variable Wordlength OFDM Receiver in Time-Varying Fading Channels by Monitoring Subcarrier SNRs" in IEICE TRANSACTIONS on Fundamentals,
vol. E99-A, no. 1, pp. 330-337, January 2016, doi: 10.1587/transfun.E99.A.330.
Abstract: Determination of wordlength is essential for designing digital circuits because the wordlength affects system performance, hardware size, and power consumption. Variable wordlength methods that a system dynamically and effectively changes the wordlength depending on surrounding environments have been studied for power reduction in wireless systems. The conventional variable wordlength methods induce communication performance degradation when compared with a floating-point representation in time-varying fading channels. This paper discusses rapid wordlength control on packet basis and proposes a new method based on monitoring subcarrier SNRs in an OFDM receiver. The proposed method can estimate signal quality accurately and can decrease the wordlength decision errors. The simulation results have indicated that the proposed method shows better PER performance compared with the conventional methods.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E99.A.330/_p
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@ARTICLE{e99-a_1_330,
author={Shingo YOSHIZAWA, Daichi SASAKI, Hiroshi TANIMOTO, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Power Reduction of Variable Wordlength OFDM Receiver in Time-Varying Fading Channels by Monitoring Subcarrier SNRs},
year={2016},
volume={E99-A},
number={1},
pages={330-337},
abstract={Determination of wordlength is essential for designing digital circuits because the wordlength affects system performance, hardware size, and power consumption. Variable wordlength methods that a system dynamically and effectively changes the wordlength depending on surrounding environments have been studied for power reduction in wireless systems. The conventional variable wordlength methods induce communication performance degradation when compared with a floating-point representation in time-varying fading channels. This paper discusses rapid wordlength control on packet basis and proposes a new method based on monitoring subcarrier SNRs in an OFDM receiver. The proposed method can estimate signal quality accurately and can decrease the wordlength decision errors. The simulation results have indicated that the proposed method shows better PER performance compared with the conventional methods.},
keywords={},
doi={10.1587/transfun.E99.A.330},
ISSN={1745-1337},
month={January},}
Copy
TY - JOUR
TI - Power Reduction of Variable Wordlength OFDM Receiver in Time-Varying Fading Channels by Monitoring Subcarrier SNRs
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 330
EP - 337
AU - Shingo YOSHIZAWA
AU - Daichi SASAKI
AU - Hiroshi TANIMOTO
PY - 2016
DO - 10.1587/transfun.E99.A.330
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E99-A
IS - 1
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - January 2016
AB - Determination of wordlength is essential for designing digital circuits because the wordlength affects system performance, hardware size, and power consumption. Variable wordlength methods that a system dynamically and effectively changes the wordlength depending on surrounding environments have been studied for power reduction in wireless systems. The conventional variable wordlength methods induce communication performance degradation when compared with a floating-point representation in time-varying fading channels. This paper discusses rapid wordlength control on packet basis and proposes a new method based on monitoring subcarrier SNRs in an OFDM receiver. The proposed method can estimate signal quality accurately and can decrease the wordlength decision errors. The simulation results have indicated that the proposed method shows better PER performance compared with the conventional methods.
ER -
English
