EMC’04/Sendai BER ANALYSIS OF Bluetooth SYSTEM INTERFERED BY MICROWAVE OVEN NOISES

Electromagnetic disturbances emitted from microwave ovens may cause serious interference with Bluetooth systems in the 2.4 GHz ISM (Industrial, Scientific and Medical) band. In this paper, the bit error rate (BER) performance of Bluetooth systems interfered by microwave oven noises is analyzed using a microwave oven noise model which consists of FM periodic tone-bursts. Employing Bennett’s method, BER of the GFSK demodulation with a frequency discriminator is theoretically evaluated. Numerical simulations are also conducted to verify the validity of the analysis. The results show that 1) BER is strongly affected by the probability density of the oven noise frequency, and that 2) the FM tone-bursts model for the oven noise yields better BER performance than the conventional pulsed Gaussian noise model ( -mixture model) under high CNR conditions.