Research On Reliable Receiving Technology In Diffusion-based Molecular Communication

In recent years,the development of nanotechnology,bioengineering and synthetic biology has made it possible to realize the nano-networks.However,the traditional electromagnetic wave-based communication is limited by the complex environment of the nano network and energy consumption,and cannot achieve the desired performance.In this context,Molecular Communication(MC),which uses molecules and other particles as information carriers,is an effective solution to solve communication problems in nano-networks.In diffusion-based molecular communication,molecules that follow random Brownian motion make it more random.This randomness can cause very serious Inter Symbol Interference(ISI)during signal reception.In addition,there are other noises in the diffusion channel,such as additive noise at the receiver.These interferences and noise pose a significant threat to the reliability of diffusion-based molecular communication.Therefore,in order to reduce the influence of ISI and other noises in the diffusion channel,this thesis mainly studies the reliable receiving technology scheme that can effectively avoid ISI and other interference in the diffusion-based molecular communication.The main research contents and contributions of this thesis are as follows:1.The diffusion-based molecular communication system model is studied,which mainly includes modulation,transmission and demodulation,etc.2.For the prevalent ISI and other noises in the diffusion-based molecular communication,this thesis proposed an Increase Detection Algorithm(IDA)based on molecular concentration.The performance of the proposed algorithm is analyzed by combining many parameters,such as the bit error rate(BER)and the signal-to-noise ratio(SNR)et al.And compare the IDA with the traditional algorithm based on fixed threshold.3.The current research on molecular communication mostly uses software simulation.At the same time,biological laboratories need high cost and strict requirements.This thesis uses the diffusion movement of alcohol molecules in the air to build a diffusion-based molecular communication physical simulation platform on macroscopic scale.In addition,compare the IDA algorithm proposed in this thesis with the traditional receiving algorithm in verification and result analysis.Both software simulation and experimental results show that,the proposed IDA can effectively reduce or even eliminate the inter-symbol interference and other noise in the diffusion channel,and can increase the data transmission speed by reducing the time slot length,which improves the overall performance of the diffusion-based molecular communication system.The macroscopic diffusion-based molecular communication physical simulation platform proposed in this thesis provides a new verification method for the research in the field of molecular communication,and the verification method has proven to be inexpensive and effective.