A SAW-BASED SPREAD-SPECTRUM WIRELESS LAN SYSTEM

The spread spectrum system (abbreviated as SS system) is known to be a n excellent communication system which resists jamming. Recently, its application to a simplified wireless communication system has been con sidered to be suited for consumer communication. In Japan, SS wireless LAN system has got the approval on 2.4 GHz ISM band already. A compac t SS transceiver for the SS wireless LAN is realized, whose data ratio is 230 kbps. The SS transceiver is based on a direct sequence for the modulation, and the demodulation is carried out by a specially develo ped SAW device. In the first part of this paper, the technical conditi ons of the SS wireless LAN are mentioned. Then the SAW device and the principle of the demodulation are discussed. Finally, the configuratio n of the SS transceiver and the protocol of the SS wireless LAN are pr esented.