| 摘要 |
PURPOSE: A receiving device of a parking assistance system and a receiving method thereof are provided to improve operation reliability and to reduce production costs by improving the signal to noise ratio of a sensor without using the existing components having expensive unit prices. CONSTITUTION: A receiving device(100) includes a clamping part(110), an amplifier part(120), an A-D(Analogue-to-Digital) converter part(130), a filter part(140), a square detection part(150), a threshold value storage part(160), a comparison part(170), and a control part(180). The A-D converter part converts an analogue signal, corresponding to the ultrasonic wave received at a vehicle, into a digital signal. The square detection part detects the absolute value square of the converted digital signal amplitude by using a square estimation algorithm. The comparison part compares the detected value and a predefined threshold value, and outputs the comparison result value. [Reference numerals] (110) Clamping part; (120) Amplifier part; (130) Analogue-to-digital converter part; (140) Filter part; (150) Detection part; (160) Threshold value storage part; (170) Comparison part; (180) Control part
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