Bit error rate reduction by PSO in indoor wireless communication

In this paper, a new ultra wideband (UWB) circular antenna array (UCAA) combining particle swarm optimizer (PSO) to minimize the bit error rate (BER) is proposed. The novelties of our approach is not only choosing BER as the object function, but also consider the antenna feed length effect of each array element. The strong point of the PSO is that it can find out the solution even if the performance index cannot be formulated by simple equations. Simulation results show that the synthesized antenna array pattern is effective to focus maximum gain to the LOS path. As a result, the BER can be reduced substantially in indoor UWB communication system.