Performance Analysis of Diffusion-Based Molecular Communications With Memory

Abstract

Abstract-In this paper, the comprehensive delay and performance analyses of the M-ary molecular communications with memory are presented. By taking into account any level of channel memory, the type-based and concentration-based modulation schemes are introduced and analyzed. In the typebased modulation, information symbols are encoded through different molecule types. In the concentration-based modulation, various concentration levels of one molecule type are used to encode information symbols. For both modulation schemes, the delay distributions of the molecular symbols are derived, and then, the symbol error probabilities are developed. The given distributions and the error probability expressions are validated through extensive simulation experiments. After showing that the derived expressions are valid, the performance of the modulation schemes is evaluated. The performance evaluations reveal that by properly selecting the parameters such as slot time and number of emitted molecules, the performance can be improved in both type and concentration-based molecular communication as the channel memory is increased. Furthermore, it is shown that the type-based molecular communication outperforms the concentration-based molecular communication.

Performance of diffusive molecular communication systems with binary molecular shift keying modulation

“…Explicitly, the PDFs in (50) take the same forms as those in (22) in Section 3.2. Hence, when given the threshold C T = 0 for decision making, the BER of the BMoSK-modulated DMC systems with ISIC is given by (26) with μ Z 0 , σ Z 0 and μ Z 1 , σ Z 1 replaced by the corresponding terms are shown in (51).…”

“…In [50], the authors have derived the error probability and capacity of the DMC systems relying on M-ary amplitude modulation. By contrast, with the aid of the binomial modelling of the molecules hitting receiver, the authors of [51,52] have analysed the capacity and error rate of the DMC systems with CSK and MoSK modulations. Very recently, the error rate of the DMC systems with binary CSK (or on-off keying (OOK)) modulation has been addressed in [27], where different approaches are introduced for deriving the BER expressions of the DMC systems with/without ISI compression (ISIC).…”

Effects of Framing Errors on the Performance of Molecular Communications With Memory

“…For instance, Fig. 3, depicts the evolution of SEP(a, τ d ) [30], which focused on the characterization of the performance effects of any level of ISI window and the parameter selection that optimizes these effects. As it can be noticed, there is a flat region where the symbol error probability is very small.…”

Error Performance Analysis of Diffusive Molecular Communication Systems With On-Off Keying Modulation

“…Finally, when substituting both (34) and (35) into (25), the BER of the OOK modulated DMC systems under the Gaussian-approximation can be obtained.…”

“…In their analysis, molecules transmitted associated with different symbols are assumed to arrive at the receiver according to the binomial distributions, which are then approximated by the Gaussian distributions for deriving the error probability. Very recently, the authors of [34] have carried out the analysis for the DMC systems with both CSK and MoSK modulations, when modeling the number of molecules hitting the receiver at any time as the binomial distribution.…”