| 摘要 |
PURPOSE:To provide a detection system/device which can detect an accurate momentary Doppler frequency shift in real time. CONSTITUTION:A measurement means 10 measures the fading distortion amount of an existing signal, and an estimation means 20 successively swicthes the weight coefficients corresponding to each Doppler frequency shift on a weight coefficient table 21. Thus the means 20 estimates a fading distortion amount based on each coefficient. Then a detection means 40 detects a weight coefficient with which the difference is minimized between each estimated value and measured value and detects the Doppler frequency shift. This detection device is generally applied to the systems that need to detect the Doppler frequency shift. |
