EMC’04/Sendai An Empirical 802.11b WLAN Performance Prediction Model in a noise environment by APD

This paper investigates a measurement method and an empirical model that predict a performance reduction of 802.11b WLAN service. To preserve quality of wireless digital communication service above 1 GHz in a noise environment, the prediction method is important and has many electromagnetic compatibility institutes focused in the method to determine permissible disturbance limits. There are many methods to represent a noise signal. In CISPR committee, amplitude probability distribution(APD) method is proposed. The quality of digital communication service is usually expressed a bit error rate(BER) or throughput and it has been reported that degradation of BER or throughput can be estimated from the APD of noise amplitude. We investigate the method to measure the APD to fit 802.11b WLAN service. Therefore, we propose a simple experimental prediction method on APD to be used in permissible disturbance limits for frequency bands above 1GHz.