Effect of memory on BER in molecular communication

In molecular communication, some molecules stay longer in the medium and impinge on later transmissions. The bit error rate (BER) of a diffusion-based molecular communication channel which has memory is analysed. The effect of four previous symbols on the current symbol is considered. Human insulin hormone is used as the messenger molecule and the first passage time of a molecule has been defined as the delay. Channel memory has been found to have a profound influence on the BER.