On the optimal timing of detection in molecular communication systems

In this paper, the error performance of a molecular communication via diffusion system in the absence of flow is analysed. Closed-form expressions for the bit error rate are presented and utilized to enhance the timing of the receiver's observations, which are used in the detection of the transmitted information. More precisely, we specify the optimal time, when the observation process should start and finish, in order to achieve the minimum probability of error. Furthermore, in the case where the receiver counts the molecules at specific time instants, an advantageous sampling time has been proposed, along with the ideal number of samples that should be collected in order to minimize the error probability. Finally, closed-form expressions for the first sample and the total number of samples that should be considered, have been derived and validated through extensive simulations.