Demodulation method in molecular communication

Abstract

The invention discloses a demodulation method in molecular communication. The demodulation method is characterized by comprising the following steps: assuming that an originating party adopts a time-slot on-off keying (OOK) method to represent a digital signal, judging whether a molecular concentration received in a time slot has an obvious rising process or not during the demodulation process, if the molecular concentration has the obvious rising process, demodulating the molecular concentration to be information bit '1', and otherwise demodulating to be information bit '0'. By adopting the demodulation method, the defect of unreliability caused by demodulation by virtue of detection of the molecular concentration can be overcome; and moreover, the molecular concentration only needs to be sampled in a period of time after the beginning of each time slot rather than in the whole time slot, so that the calculation burden of the demodulation algorithm is alleviated. Meanwhile, the technical scheme is realized according to a variation rate of the molecular concentration, so that the influence of the intersymbol interference caused by a molecular aggregation problem on a demodulation result can be effectively alleviated, the reliability of the demodulation algorithm is improved, and the demodulation method is generally suitable for demodulating information in the molecular communication based on a diffusion way.

Description

technical field [0001] The invention belongs to the field of molecular communication, and in particular relates to a demodulation algorithm in which the modulation mode is time slot on-off keying and the molecular concentration change rate in the molecular communication process. Background technique [0002] Molecular communication is an emerging interdisciplinary technology in recent years. It mainly studies the technology of realizing information transmission between cells by using nanometer-sized molecules as information carriers. At present, the demodulation algorithm for receiving information in molecular communication is mainly based on the concentration of molecules. That is, within a certain time slot, the sender expresses a "1" signal by sending a certain concentration of molecules, but does not send molecules for a "0" signal; The information is demodulated to a bit "1", otherwise it is demodulated to a bit "0". The entire communication process is realized based ...

AI Technical Summary

Problems solved by technology

This molecular communication demodulation algorithm based on molecular concentration is very simple to implement, but due to the random diffusion characteristics of molecules and the accumulation of residual molecules in the medium, the intersymbol crosstalk problem is very serious, which is virtually the selection of the threshold value. It is very difficult, the bit error rate of signal discrimination is high, and the reliability of the molecular communication process is greatly affected

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