高精度時間同期におけるFPGAベースのキャリーチェーンTDCとDDMTDスキームの適用と比較
Yuzhen Huang1, Jiajie Yu1, Wenlong Xia1
1College of Electronics and Information Engineering, Sichuan University, No. 24, Section 1, Yihuan Road, Wuhou District, Chengdu 610065, China.
Sensors (Basel, Switzerland)
|February 13, 2026
まとめ
この研究では,FPGAベースの2つの相相差測定方法が導入され,精密タイミングアプリケーションの優れた精度,解像度,温度安定性を示す8つの並列のマルチキャリーチェーンタイム・トゥ・デジタル変換器 (TDC) が導入されました.
科学分野:
- 電気工学 電気工学とは
- デジタル信号処理 デジタル信号処理
- 測定科学 測定科学とは
背景:
- 高精度の相差測定は,時間周波数伝送や信号同期などのアプリケーションに不可欠です.
- 従来の方法は,温度安定性や測定精度の限界に直面しています.
- フィールドプログラム可能なゲート配列 (FPGA) は,高度な測定ソリューションのための柔軟なプラットフォームを提供します.
研究 の 目的:
- FPGA技術を活用した2つの高精度相相差測定システムを提案し,評価する.
- 温度安定性と精度に関する既存の方法の欠点を解決する.
- 単一キャリアチェーンTDCとデジタルデュアルミクサータイムディファレンス (DDMTD) モジュールに対する8並列マルチキャリアチェーンタイム・トゥ・デジタルコンバータ (TDC) の性能を比較する.
主な方法:
- FPGAに8並列の多キャリアチェーンTDCモジュールの実装.
- デジタルデュアルミクサー時差測定モジュール (DDMTD) の開発.
- 異なる条件下で測定精度,解像度,および温度安定性の比較分析.
- MMCMのダイナミック・フェーズシフト・シグナルを使用して,相相差の評価を行う.
主要な成果:
- 室温では,シングルキャリーチェーンTDCは4.7-6.0psの測定誤差を達成し,DDMTDの20-75psの誤差を上回った.
- 8並列マルチキャリーチェーンのTDCは,卓越した精度 (室温で4.6psの誤差),解像度 (0.833ps対6.329ps),および温度安定性 (0.000564ps/°C対0.002127ps/°C) を10°Cから100°Cの範囲で実証しました.
- 8並列マルチキャリーチェーンのTDCは,さまざまな温度条件下での精度,解像度,および温度安定性において,シングルキャリーチェーンのTDCを一貫して上回りました.
結論:
- 8並列マルチキャリーチェーンのTDCは,FPGAベースの相差測定の精度,解像度,および温度安定性を大幅に改善します.
- 両方の提案されたFPGAスキームは,従来の方法の実行可能な代替案を提供し,多キャリアチェーンTDCは要求の高いアプリケーションに好ましい.
- この研究は,実装の複雑性と堅牢性を考慮して,FPGAプラットフォーム上の高精度相差測定技術の最適化のための貴重な洞察を提供します.
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