SIGNAL ANALYZER, SIGNAL ANALYSIS METHOD, AND PROGRAM

• Main Author: SHIIKI YUSUKE
• Format: Patent
• Language: English; Japanese
• Published: 13.09.2021
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

To provide a signal analyzer capable of reducing calculation load than the OMP (Orthogonal Matching Pursuit) while maintaining narrowband signal detection accuracy, a signal analysis method, and a program capable of causing a computer to execute the method.SOLUTION: The signal analyzer repeats a series of processing to select basis functions with respect to a received signal using a basis function set that contains multiple basis functions and a series of processing to subtract the selected basis function from the received signal and estimates a combination of the basis function and the amplitude, which represent the received signal of the snapshot which is the unit of observation time to thereby search for basis function to be repeated for estimation for each snapshot. The signal analyzer has correlation evaluation means for correlating residual signals with multiple basis functions using the received signal as a residual signal and a selection method for selecting two or more basis functions based on the evaluation results by the correlation evaluation means when selecting a basis function.SELECTED DRAWING: Figure 2 【課題】狭帯域信号検出精度を維持しつつ、ＯＭＰよりも計算負荷を軽減する信号分析装置、信号分析方法およびその方法をコンピュータに実行させるためのプログラムを得る。【解決手段】受波信号に対して、複数の基底関数を含む基底関数セットを用いて、基底関数を選択する処理と選択した基底関数を受波信号から差し引く処理とを繰り返すことで、観測時間単位であるスナップショットの受波信号を表す基底関数と振幅との組み合わせを推定し、スナップショット毎に推定を繰り返す基底関数探索を行う信号分析装置であって、受波信号を残差信号として、残差信号と複数の基底関数とを相関評価する相関評価手段と、基底関数を選択する際、相関評価手段による評価結果に基づいて、基底関数を２以上選択する選択手段と、を有するものである。【選択図】図２