Research On DNA Information Storage Method Based On Raptor Code

In the age of information explosion,the amount of information generated globally in the past two years has even been greater than the sum of information in the past five years,which means the growth rate is amazing.What's more,widely used storage devices such as disks and semiconductors,are gradually exposing their innate deficiencies,so it is urgent to find a new altenerative storage technology.Deoxyribonucleic acid(DNA)is a natural information storage medium with inherent advantages,such as large storage capacity,long service life and low power.With the rapid development of DNA synthesis and sequencing technology,researchers regard DNA as the next generation of information storage medium,and proposed a storage scheme which encodes the binary data to four base pairs A,T,C,and G in DNA,using DNA synthesis to store text documents,pictures,audio,and video.The DNA information storage scheme proposed in recently years mainly consists of three technologies,encoding and decoding,error correction and biotechnology.However,the encoding and decoding technology used in this field has some shortages,such as low storage accuracy,poor scalability,low efficiency and high complexity.In addition,the error correction technology is mostly binary error correction,while the DNA base is a quaternary sequence.In order to solve these problems,this paper proposes a new DNA information storage scheme.The main work of this paper is as follows:(1)Applying the Raptor code to the DNA information storage system,a Raptor code suitable fot DNA information storage technology is proposed which the degree distribution function is improved.It establishes the mapping relationship between the information binary and the base sequence,balances the contradiction between space complexity and coding efficiency;(2)Use RS error coding to ensure the accuracy of information storage,and in order to match the structural characteristics of DNA bases,a quaternary RS error coding is proposed.In addition,a method about GC content and homopolymer screening which can reduce DNA synthesis and sequencing error is also proposed;(3)The DNA-Raptor information storage method in this paper was simulated by information technology and biotechnology.The biotechnology mainly includes DNA synthesis experiment and DNA sequencing experiment.The whole process of DNA information storage was completed,and illustrate the advantages of the proposed method after comparing with other DNA information storage technology.