데이터 신뢰도를 고려한 저전력 TPMS 양방향 통신기법

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TPMS (Tire Pressure Monitoring System) is a wireless communication device used for vehicle, and can be defined as a safety support system for vehicle operation by efficiently managing information such as the tire pressure and temperature, to maintain the optimal tire operation conditions.
TPMS transmits the data measured by the sensor unit through the wireless communication to the signal processor unit within the vehicle, and a battery is used for such data transmission. On average, the battery life is about 7 years, and the problem is that TPMS itself must be replaced according to the battery life. In order to maximize the power efficiency of batteries used for TPMS, this study suggests a data structure for duplex wireless communication. Computer simulation will verify the performance of technology suggested in this paper.
Because TPMS uses wireless communication, it creates communication failure due to various noises and interferences when receiving/transmitting data. In order to prevent tire accidents which are directly related to the driver’s safety, and improve data reliability for the TPMS wireless communications, this thesis suggests a reliability evaluation method for determining the data reliability by measuring SINR (signal-to-interference and noise ratio) of the received signal at the receiver. The method suggested in this paper will be able to used widely not only for TPMS but also for duplex communication system based on a sensor. The computer simulation will verify critical SINR values satisfying reliability rates of 95%, 97%, and 99%.
When the data measured at TPMS sensor unit is transmitted to the signal processing unit inside the vehicle, it suffers from various interferences that causes communication failure. In order to remove such interference, some papers have studied for interference suppression by using beamforming technology such as Switching Beamformer, GSC(Generalized Sidelobe Canceler) Beamformer, MVDR(Minimum Variance Distortionless Response) Beamformer, etc. In this paper, the complexity of these beamformers that are effective in removing TPMS interference are calculated to mathematically compare them. The computer simulation will verify the complexity of three beamformers introduced in this paper.
Alternative Title
Low-Power TPMS Duplex Communication Technique Considering Data Reliability
Alternative Author(s)
Kim, Seong Min
일반대학원 첨단부품소재공학과
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Table Of Contents

제1장 서론 1
제1절 연구배경 1
제2절 연구목적 및 방법 3

제2장 저전력 TPMS 무선통신을 위한 양방향 통신 5
제1절 TPMS에 적용된 양방향 무선통신방식 6
1. 양방향 무선통신을 위한 전력 모델 6
2. TPMS 양방향 무선통신을 위한 데이터 구조 6
3. TPMS 양방향 무선통신을 위한 시스템의 기본 알고리즘
제2절 컴퓨터 시뮬레이션 10
제3절 결론 12

제3장 양방향 통신 기반의 TPMS 데이터 신뢰성 평가기법
제1절 수신신호 모델 13
제2절 유효신호 판정 알고리즘 15
1. TPMS의 유효신호판정을 위한 양방향 무선통신 데이터 구조 15
2. 신호처리부의 유효신호 판정구조 15
3. 센서부의 유효신호 판정구조 17
제3절 컴퓨터 시뮬레이션 19
제4절 결론 21

제4장 TPMS 빔형성 시스템의 복잡도 계산 22
제1절 수신신호 모델 23
제2절 간섭제거를 위한 빔형성기 25
1. 스위칭 빔형성기 25
2. GSC 빔형성기 26
3. MVDR 빔형성기 27
제3절 빔형성기의 계산 복잡도 28
1. 스위칭 빔형성기 28
2. GSC 빔형성기 28
3. MVDR 빔형성기 29
제4절 컴퓨터 시뮬레이션 31
제5절 결론 35

제5장 결론 36

Reference 38
조선대학교 대학원
김성민. (2012). 데이터 신뢰도를 고려한 저전력 TPMS 양방향 통신기법.
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