A CDMA acoustic communication system for multiuser based on sound card

Author

Zhao, Zixin ; Guo, Shuxiang

Author_Institution

Fac. of Eng., Kagawa Univ., Takamatsu, Japan

fYear

2011

fDate

6-8 June 2011

Firstpage

69

Lastpage

74

Abstract

In this paper, a CDMA acoustic communication system for multiuser based on hardware platform is developed. The sound card in the computer with sound box and microphone is used as the energy transduction to accomplish acoustic communication. For the hardware part, DS18B20 is taken for example as the data source to generate the original signals and MAX232 chip is adopted to connect the MCU to the RS-232 port in the computer. For the software part, MATLAB is used to accomplish reading and writing of the serial port data and carry out algorithms such as spread spectrum and modulation based on QPSK-CDMA (Quadrature Phase Shift Keying-Code Division Multiple Access). MMVARI is adopted to drive the sound card to form the acoustic signals from the digital data. The experimental results indicate good quality of the communication system.

Keywords

audio signals; code division multiple access; quadrature phase shift keying; underwater acoustic communication; CDMA acoustic communication system; DS18B20; MAX232 chip; QPSK; RS-232 port; code division multiple access; microphone; quadrature phase shift keying; serial port data; sound card; Communication systems; Computers; Hardware; Microphones; Oceans; Underwater acoustics; Multiuser; QPSK-CDMA; Sound card; Underwater acoustic communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Information and Automation (ICIA), 2011 IEEE International Conference on

Conference_Location

Shenzhen

Print_ISBN

978-1-4577-0268-6

Electronic_ISBN

978-1-4577-0269-3

Type

conf

DOI

10.1109/ICINFA.2011.5948965

Filename

5948965