A Simple Optical Audio Signal Transmitting System Using Maximum Length Sequence

摘要：

In the previous paper, we reported a communication method of audio signal using LED or laser diode. However the interference occurs easily in the receiver side when multiple transmitters exist. In this paper, we propose a new modulation technique which does not produce interference. In this method, the random number signal is generated using Maximum Length Sequence (MLS) by a microcomputer. An audio signal and random number are compared. If the audio signal is larger than the random number, a square wave of AM broadcasting modulates a optical source. If the audio signal is smaller than the random number, the optical source is turned on and off alternately. We change the period of the random number signal and examine the characteristic and the effectiveness of this method by some experiments.

作者: Atushi Minato Shun Liu Fuhui Guo Masanori Itaba Satoru Ozawa

作者单位: Graduate School of Science and Engineering,Ibaraki University Japan Changzhou Institute of Supermedia and Sensing Technology National University of Defense Technology C Applied grain specialty of Graduate School of Science and Engineering,Ibaraki University,Japan College of Engineering,Ibaraki University,Japan

会议类型: 国际会议

会议名称: 2009 IEEE International Conference on Robotics and Biomimetics(2009 IEEE 机器人与仿生技术国际会议 ROBIO 2009)

会议地点: 桂林

会议语种:英文

页码: 1826-1831

在线出版日期: 2009-12-19（万方平台首次上网日期，不代表论文的发表时间）