信号の周波数変換による位相限定相関関数の挙動の変化

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2021/02/01

タイトル(英語): Variability of Behavior of Phase-Only Correlation Functions under Frequency Transformation of Signals

著者名: 佐藤　有弥（東北大学大学院　医工学研究科），八巻　俊輔（東北大学 サイバーサイエンスセンター），吉澤　誠（東北大学 サイバーサイエンスセンター）

著者名(英語): Yuya Sato (Graduate School of Biomedical Engineering, Tohoku University), Shunsuke Yamaki (Cyberscience Center, Tohoku University), Makoto Yoshizawa (Cyberscience Center, Tohoku University)

キーワード: 連続時間信号，位相限定相関関数，周波数変換_x000D_　　continuous-time signals，Phase-Only Correlation function，frequency transformation

要約(英語): This paper clarifies variability of behavior of Phase-Only Correlation functions under frequency transformation of continuous-time signals. The signals are classified into two categories: continuous time signals defined on a continuous time axis and discrete time signals defined on a discrete time axis. Continuous time signals are converted into discrete time signals by sampling at arbitrary periods when signal processing is performed. When a discrete-time signal is obtained by sampling a continuous-time signal with a constant sampling period, the phase defined by (-∞, ∞) in the continuous-time signal is restricted to (-π, π] in the discrete-time signal. It is necessary to consider the nature of the POC functions for continuous-time signals, which has been analyzed for discrete- time signals in previous studies.In order to preserve the information in the phase spectrum at continuous time, it is necessary to suppress the changes in the phase spectrum that occur during the sampling of the signal. In this paper, we propose a nonlinear transformation of the phase spectrum using the projection method in continuous time.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.141 No.2 （2021） 特集I：IoT社会の進歩を促進するワイヤレス技術　　特集Ⅱ：ディジタル信号処理のためのシステム技術

本誌掲載ページ: 147-154 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/141/2/141_147/_article/-char/ja/