Experiments on Acoustic Communication with Quadrature Amplitude Modulation in Multipath Environment
スポンサーリンク
概要
- 論文の詳細を見る
An experiment on high-speed underwater acoustic data communication was carried out at real sea as a time-variant multipath channel. Demodulation was processed by a multichannel decision feedback equalizer (DFE) demodulator with adaptive filtering. The modulation method used was 16-quadrature amplitude modulation (16-QAM), transmitting rate was 32 k bit per second (bps), carrier frequency was 20 kHz, and bandwidth was 8 kHz (16–24 kHz). Good demodulation results were obtained at a sea trial despite the presence of high-level multipaths. At real sea, we proved that high-speed (32 kbps) acoustic communication can be realized even in a multipath fading channel with 16-QAM. Therefore, it is expected that the flexibility of the design of underwater equipment will be improved, because the influence of a circumferential structure can be neglected.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2004-05-15
著者
-
OCHI Hiroshi
Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
-
WATANABE Yoshitaka
Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
-
SHIMURA Takuya
Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
-
Shimura Takuya
Japan Marine Science and Technology Center (JAMSTEC), Natsushima-cho 2-15, Yokosuka, Kanagawa 237-0061, Japan
-
Watanabe Yoshitaka
Japan Marine Science and Technology Center (JAMSTEC), Natsushima-cho 2-15, Yokosuka, Kanagawa 237-0061, Japan
関連論文
- Basic Study of Underwater Acoustic Communication Using 32-Quadrature Amplitude Modulation
- Experiments on Acoustic Communication with Quadrature Amplitude Modulation in Multipath Environment
- Analysis of Scattered Sound from Underwater Hollow Cylinders Using the Wigner Distribution Fuhction
- Characteristics of M-Sequence Signal in an Inhomogeneous Medium
- Advantage of Multichannel Decision Feedback Equalizer on Underwater Acoustic Communication
- Search for Objects on the Deep-Sea Floor Using Side Scan Sonar with a Tilted Arrangement Transducer Array
- Sea Trial Results of a Cross Fan Beam Type Sub-Bottom Profiler
- Development of an Acoustic Lens for an Imaging Sonar for Autonomous Underwater Vehicle "Urashima" and Experimentation in a Water Tank(Instrumentation, Measurement, and Fabrication Technology)
- Evaluation of the Performance of Deep Sea Survey Sonars from the Results of Search for a Sunken Ship
- Search for Objects on the Deep-Sea Floor Using Side Scan Sonar with a Tilted Arrangement Transducer Array
- Basic Study of Underwater Acoustic Communication Using 32-Quadrature Amplitude Modulation
- Experiments on Acoustic Communication with Quadrature Amplitude Modulation in Multipath Environment
- Development of Tilted Toroidal Beam Wideband Transducer Using Quadrature Phase Shift Keying for Underwater Acoustic Communication
- Basic Study on Acoustic Communication Using Direct-Sequence Spread Spectrum for Underwater Acoustic Positioning