FMCW 레이더 센서 기반의 강의용 광역 마이크 시스템 = Widerange Microphone System for Lecture using FMCW Radar Sensor

다국어 초록 (Multilingual Abstract)

In this paper, we propose a widerange array microphone for lecturer tracked with Frequency Modulated Continuous Waveform (FMCW) radar sensor. Time Difference-of-Arrival (TDoA) is often used as audio tracking, but the tracking accuracy is poor because the frequency of the voice is low and the relative frequency change is large. FMCW radar has a simple structure and is used to detect obstacles for vehicles, and the resolution can be archived to several centimeter. It is shown that the sensor is useful for detecting a speaker in open area such as a lecture, and we propose an wide range 4-element array microphone beamforming system. Through some experiments, the proposed system is able to adequately track the location and showed a 8.6dB improvement over the selection of the best microphone.

참고문헌 (Reference)

1 오우진, "천정형 배열 마이크를 이용한 강의용 광역 마이크 시스템" 한국정보통신학회 22 (22): 624-633, 2018

2 Texas Instrument, "User's Guide: mmWave Demo Visualizer"

3 J. Benesty, "Springer handbook of speech processing" Springer 2008

4 E. Yavari, "Is there anybody in there? : Intelligent radar occupancy sensors" 15 (15): 57-64, 2014

5 S. Rao, "Introduction to mmWave sensing: FMCW radars"

6 S. Seo, "3D Impulsive Sound-Source Localization Method through a 2D MEMS Microphone Array using Delay-and-Sum Beamforming" 170-174, 2017

7 Mariam Yiwere, "3-D Sound Source Localization using Energy-Based Region Selection and TDOA" 한국정보통신학회 21 (21): 294-300, 2017