キャリア周波数オフセットによるOFDMのためのアナログシャノン-コテルニコフマッピングの共同最適化と性能分析
Jingwen Lin1, Qiwang Chen1, Yu Hua1
1Xiamen Key Laboratory of Mobile Multimedia Communications, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China.
Entropy (Basel, Switzerland)
|August 28, 2025
まとめ
この研究は,信号品質を改善し,電力効率を分析するために,キャリア周波数オフセット (CFO) を扱うOFDMシステムのためのアナログ共同ソースチャンネルコーディング (AJSCC) を最適化します.
科学分野:
- 電気工学
- 情報理論
- ワイヤレス通信
背景:
- シャノン-コテルニコフ (S-K) マッピングを用いたアナログ共同ソースチャネルコーディング (AJSCC) は,直角周波数分割マルチプレキシング (OFDM) システムにおいて有望である.
- キャリア周波数オフセット (CFO) は,性能を低下させるワイヤレスシステムの一般的な障害です.
研究 の 目的:
- AJSCC-OFDMシステムのパフォーマンスを分析する.
- CFOの制約の下でAJSCC-OFDMのS-Kマッピングを最適化する.
- 最適化されたAJSCCがピークと平均の電力比 (PAPR) に与える影響を調査する.
主な方法:
- シグナル対歪み比 (SDR) を最大化するための共同最適化戦略を開発した.
- CFOの制約を最適化プロセスに組み込みました
- 最適化されたAJSCC-OFDMシステムのPAPR特性を分析した.
主要な成果:
- 提案された共同最適化戦略は,CFOの下でSDRを効果的に最大化します.
- 最適化されたAJSCC戦略は,エンコードされたシンボルの振幅分布に影響を与えます.
- PAPRの特徴は,異なるAJSCCパラメータに関して分析されます.
結論:
- 最適化されたAJSCC-OFDMアプローチは,CFOにもかかわらずシステムのパフォーマンスを向上させます.
- SDRとPAPRのトレードオフは,AJSCC-OFDMシステムの設計において極めて重要です.
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