| 摘要 |
PURPOSE:To increase a frame detecting speed, and to attain the miniaturization and low cost of an orthogonal detection circuit, in a frame detection circuit which detects a frame from plural complex base band signals. CONSTITUTION:This circuit is constituted of a phase difference arithmetic means 2 and an absolute value arithmetic means 3 which search a phase difference and absolute value between the complex base band signals, a phase difference range discriminating means 4 and an absolute value range discriminating means 5 which discriminate that the plural phase differences and absolute values are matched, and a control means 6 which discriminates that the frame is detected when the matching discrimination is operated by the phase difference range discriminating means 4 and the absolute value range discriminating means 5. |
