Study on Spread Spectrum Communication System by Using Automatic Guided Vehicles

Abstract

In this paper, the communication control is intended to make a systematic efficiency of automatic guided vehicles operate effectively. Recently, we have studied on a spread spectrum communication system which enables radio communication at such a low level of energy as 1mW.
Herein suggestion is a spread spectrum code generator method and a communication signal or synchronized spread spectrum code detector method, respectively. As these methods made the synchronization of communication signals and synchronized spread spectrum codes possible with certainty, a comminication unit by using these methods was designed and manufactured for testing. As the result, an attempt of synchronization was confirmed successful in a time for one cycle of a spread spectrum code, and our studies in this attempt are described as follows.
Communication tests were then performed for the above unit which was mounted on an automatic guided vehicle with a 100kg load rating, and it was found that about 80m indoor and about 150m outdoor line-in-sight communication was practical.