COMMUNICATION APPARATUS AND DATA REGENERATION METHOD
PROBLEM TO BE SOLVED: To determine an accurate zero-cross point.SOLUTION: A communication apparatus includes: a detection unit for detecting a plurality of zero-cross samples, each of which has a sign different from that of its adjacent sample, from a plurality of samples obtained by performing over...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To determine an accurate zero-cross point.SOLUTION: A communication apparatus includes: a detection unit for detecting a plurality of zero-cross samples, each of which has a sign different from that of its adjacent sample, from a plurality of samples obtained by performing oversampling on a received signal; a conversion unit for converting positions of the plurality of zero-cross samples detected by the detection unit into a window based on a position of any one reference zero-cross sample; a calculation unit for calculating the average value of relative distances between the respective zero-cross samples after the conversion by the conversion unit and the reference zero-cross sample; and a determination unit for determining, on the basis of the average value of relative distances calculated by the calculation unit and the reference zero-cross sample, a zero-cross point to be a base point for estimating a peak position of the received signal.SELECTED DRAWING: Figure 3
【課題】正確なゼロクロス点を決定すること。【解決手段】通信装置は、受信信号をオーバサンプリングして得られる複数のサンプルから、隣接するサンプルとは正負が異なるゼロクロスサンプルを複数検出する検出部と、前記検出部によって検出された複数のゼロクロスサンプルの位置を、いずれか1つの基準ゼロクロスサンプルの位置を基準としたウインドウ内へ変換する変換部と、前記変換部による変換後の各ゼロクロスサンプルと前記基準ゼロクロスサンプルとの間の相対距離の平均値を算出する算出部と、前記算出部によって算出された相対距離の平均値と前記基準ゼロクロスサンプルとに基づいて、受信信号のピーク位置推定の基点となるゼロクロス点を決定する決定部とを有する。【選択図】図3 |
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