摘要
The distance-decay effect of molecular signals makes communication range a major challenge for diffusion-based Molecular Communication(MC).To solve this problem,the intermediate nano-machine is deployed as a relay between the transmitter and its intended receiver nano-machines.In this work,we employ the Depleted Molecule Shift Keying(D-MoSK)to model a Decode-and-Forward(DF)relay communication scheme.The closed-form expression of Bit Error Rate(BER)for the concerned DF relay with D-MoSK is derived.Meanwhile,the maximum a posteriori probability,minimum error probability,and maximum likelihood schemes are formulated for data detection.The relationships between BER and other key parameters,including the number of released molecules,receiving radius,and relay position,are investigated in detail.Simulation results show that the proposed scheme can improve communication reliability significantly.Moreover,the performance gain can be maximized by optimizing the position of the relay and the receiving radius.
基金
This paper was supported in part by the National Natural Science Foundation of China under No.61921003,61925101,and 61831002
the State Major Science and Technology Special Project(Grant No.2018ZX03001023)
the Beijing Natural Science Foundation under No.JQ18016,and the National Program for Special Support of Eminent Professionals
This paper was also supported by the Doctoral Research Fund of North China Institute of Aerospace Engineering under No.BKY-2021-17
the North China Institute of Aerospace Engineering Foundation Project under No.KY-2021-2
Langfang Science Technology Research&Development Plan Project under No.2020019002C.
