2017/12/20 by Bayram Cevdet Akdeniz, Akdeniz, Bayram Cevdet, Nafi Ahmet Turgut +9
Engineering · Biochemistry, Genetics and Molecular Biology · #Molecular Communication and Nanonetworks #Advanced biosensing and bioanalysis techniques
paper · pdf · doi:10.48550/arxiv.1712.07435
To communicate at the nanoscale, researchers have proposed molecular\ncommunication as an energy-efficient solution. The drawback to this solution is\nthat the histogram of the molecules' hitting times, which constitute the\nmolecular signal at the receiver, has a heavy tail. Reducing the effects of\nthis heavy tail, inter-symbol interference (ISI), has been the focus of most\nprior research. In this paper, a novel way of decreasing the ISI by defining a\ncounting region on the spherical receiver's surface facing towards the\ntransmitter node is proposed. The beneficial effect comes from the fact that\nthe molecules received from the back lobe of the receiver are more likely to be\ncoming through longer paths that contribute to ISI. In order to justify this\nidea, the joint distribution of the arrival molecules with respect to angle and\ntime is derived. Using this distribution, the channel model function is\napproximated for the proposed system, i.e., the partially counting absorbing\nspherical receiver. After validating the channel model function, the\ncharacteristics of the molecular signal are investigated and improved\nperformance is presented. Moreover, the optimal counting region in terms of bit\nerror rate is found analytically.\n