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Rake Receiver Algorithm for Aerial Acoustic Communication of Smart Devices : 스마트 기기를 활용한 대기중 음파 통신의 갈퀴 수신기 알고리즘 기법
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 최성현 | - |
dc.contributor.author | 가순원 | - |
dc.date.accessioned | 2017-07-14T02:42:25Z | - |
dc.date.available | 2019-04-18 | - |
dc.date.issued | 2016-02 | - |
dc.identifier.other | 000000133404 | - |
dc.identifier.uri | https://hdl.handle.net/10371/122807 | - |
dc.description | 학위논문 (석사)-- 서울대학교 대학원 : 전기·정보공학부, 2016. 2. 최성현. | - |
dc.description.abstract | Aerial acoustic communication has attracted attention recently along with the growing market of smart devices. It is because acoustic modem can be easily implemented
in smart devices by re-using the audio interfaces, i.e., internal speakers and microphones. In this thesis, a rake receiver algorithm upon a software-based demodulator of aerial acoustic communication is proposed. It is desirable to adopt a rake receiver algorithm in an chirp acoustic communication thanks to its wide bandwidth, as a rake receiver is used for in 3G Code Division Multiple Access (CDMA) mobile system. We first review an inaudible chirp-based modem architecture in [1]. Then, we propose a rake receiver algorithm which can be implemented in the aforementioned modem. The proposed rake receiver algorithm can enhance the success rate of signal reception. After that, we continue to enhance the algorithm to deal with a few erroneous cases. Through extensive experimentation we verify the algorithm performance in comparison with the demodulator in [1]. The result shows that the proposed algorithm can obtain an average gain of 58:9% in success rate of signal reception, and the maximum gain of 179% in certain device. | - |
dc.description.tableofcontents | Chapter 1 INTRODUCTION 1
Chapter 2 PRELIMINARIES 5 2.1 Acoustic Chirp Signal 5 2.2 Overview of Modem Architecture 7 2.2.1 Chirp signals and matched filter receiver 7 2.2.2 Envelope detection of chirp correlation 9 2.2.3 Frame structure 9 2.2.4 Receiver process 10 Chapter 3 PROPOSED ALGORITHM 11 3.1 Multi-path Delay Spread in Indoor Environment 11 3.2 Rake Receiver Algorithm 12 3.2.1 Philosophy of the proposed algorithm 13 3.2.2 Two-step rake finger search algorithm 14 3.2.3 Threshold for finger search 17 3.2.4 Symbol demodulation using rake fingers 19 3.2.5 Modified algorithm 19 Chapter 4 PERFORMANCE EVALUATION 22 4.1 Frequency Bandwidth and Mixing Volume of Frame 22 4.2 Experiment Setup 24 4.3 Experiment Result 25 Chapter 5 FUTURE WORK 31 Chapter 6 CONCLUSION 32 Bibliography 33 초 록 35 | - |
dc.format | application/pdf | - |
dc.format.extent | 2398904 bytes | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | Acoustic Communication | - |
dc.subject | Rake Receiver | - |
dc.subject | Chirp Modulation | - |
dc.subject | Smart Devices | - |
dc.subject.ddc | 621 | - |
dc.title | Rake Receiver Algorithm for Aerial Acoustic Communication of Smart Devices | - |
dc.title.alternative | 스마트 기기를 활용한 대기중 음파 통신의 갈퀴 수신기 알고리즘 기법 | - |
dc.type | Thesis | - |
dc.contributor.AlternativeAuthor | KA SOON-WON | - |
dc.description.degree | Master | - |
dc.citation.pages | 35 | - |
dc.contributor.affiliation | 공과대학 전기·정보공학부 | - |
dc.date.awarded | 2016-02 | - |
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