PROBLEM TO BE SOLVED: To provide a signal processing unit which keeps power consumption low by reducing signal throughput and which removes a noise component from a time-series signal.SOLUTION: The signal processing unit generates one reference signal on the basis of a first time-series signal including a first signal component with periodicity and a first noise component, a second time-series signal including a second signal component having a predetermined relationship with the first signal component and a second noise component having a predetermined relationship with the first noise component, and a predetermined relationship between the first and second noise components, generates a plurality of other signals, in which the predetermined relationship between the first and second noise components is changed by each predetermined difference, according to a recurrence formula by using data calculated from the first time-series signal and the predetermined difference, and estimates the predetermined relationship between the first and second noise components in a first predetermined time range by using the periodicity of the generated signal in the first predetermined time range.COPYRIGHT: (C)2013,JPO&INPIT【課題】信号処理量を低減し消費電力をより抑えた、時系列信号からノイズ成分を除去する信号処理装置を提供することを目的とする。【解決手段】信号処理装置は、周期性を有する第1信号成分と第1ノイズ成分とを含む第1の時系列信号と、前記第1信号成分と所定の関係を有する第2信号成分および前記第1ノイズ成分と所定の関係を有する第2ノイズ成分を含む第2の時系列信号と、前記第1ノイズ成分と前記第2ノイズ成分との所定の関係とに基づいて、基準となる1つの前記信号を生成し、前記第1ノイズ成分と前記第2ノイズ成分との前記所定の関係を前記所定の差分ずつ異ならせた他の複数の信号を、前記第1時系列信号と前記所定の差分とから算出したデータとを用いて漸化式によって生成し、第1の所定時間範囲での該生成信号の周期性を用いて、前記第1の所定時間範囲での前記第1ノイズ成分と前記第2ノイズ成分との前記所定の関係を推定する。【選択図】図1
