Sampling based Optimum Signal Detection in Concentration Encoded Molecular Communication - Receiver Architecture and Performance

In this paper for the first time ever a comprehensive analysis of the sampling-based optimum signal detection in diffusion-based binary concentration-encoded molecular communication (CEMC) system has been presented. A generalized amplitude shift keying (ASK) based CEMC system has been considered in diffusion-based noise and inter-symbol interference (ISI) conditions. We present an optimum receiver architecture of sampling-based signal detection, address the critical issues in signal detection, and evaluate its performance in terms of sampling number, communication range, and transmission data rate. ISI produced by the residual molecules deteriorates the performance of the CEMC system significantly, which is further deteriorated when the communication distance and/or the transmission data rate increase(s). The proposed receiver architecture can also be used to detect multilevel (M-ary) amplitude modulated signals by increasing the alphabet size and changing the modulation format.