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Distance Estimation Using Discretized Frequency Synthesis of Ultrasound Signals

초음파의 이산 주파수 합성을 이용한 거리 측정

  • 박상욱 (연세대학교 전기전자공학과) ;
  • 김대은 (연세대학교 전기전자공학과)
  • Received : 2010.12.30
  • Accepted : 2011.03.30
  • Published : 2011.05.01

Abstract

In this paper, we suggest a method for discretized frequency modulations of ultrasonic signals. A continuous sweep of frequency modulation signals can be modelled with fine levels of discretization. If the ultrasound signals are modulated with monotonically decreasing frequencies, then the cross-correlation between an emitted signal and received signal can be used to identify the distance of multiple target objects. For the discretized frequency synthesis, CF ultrasounds with different frequencies are serially ordered. The auto-correlation test with the signal shows effective results for distance estimation. The discretized frequency syntheses have better distance resolution than CF ultrasound signals and the resolution depends on the number of the combined ultrasound frequencies.

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