Power Reduction of Variable Wordlength OFDM Receiver in Time-Varying Fading Channels by Monitoring Subcarrier SNRs
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- YOSHIZAWA Shingo
- Department of Electrical and Electronic Engineering, Kitami Institute of Technology
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- SASAKI Daichi
- Department of Electrical and Electronic Engineering, Kitami Institute of Technology
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- TANIMOTO Hiroshi
- Department of Electrical and Electronic Engineering, Kitami Institute of Technology
抄録
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.
収録刊行物
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- IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
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IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E99.A (1), 330-337, 2016
一般社団法人 電子情報通信学会
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詳細情報 詳細情報について
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- CRID
- 1390001206310858112
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- NII論文ID
- 130005115263
- 120005983959
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- ISSN
- 17451337
- 09168508
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- IRDB
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可