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Techniques to improve the performance of wireless LAN under ISM interference environments

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3 Author(s)
S. Unawong ; Graduate Sch. of Eng., Osaka Univ., Japan ; S. Miyamoto ; N. Morinaga

It is well known that wireless local area networks (WLANs), operating in industrial, scientific and medical bands (900 MHz, 2400 MHz, and 5700 MHz ), can be seriously affected by electromagnetic interference radiated from ISM apparatus. In this paper, to improve the bit error performance of a direct-sequence spread-spectrum (DS-SS) system which is employed, in an ISM-band WLAN under ISM interference environments, we propose a multicode transmission technique and a method to observe ISM interference. Computer simulation results demonstrate that the DS-SS system employing the proposed techniques can obtain a good performance even in the presence of ISM interference.

Published in:

Communications, 1999. APCC/OECC '99. Fifth Asia-Pacific Conference on ... and Fourth Optoelectronics and Communications Conference  (Volume:1 )

Date of Conference:

18-22 Oct. 1999