Research And Implementation Of Multiple Access Technology Based On Nested Lattice Coding

For mobile communication, spectrum resources is extremely limited. To optimize the use of these resources to achieve efficient and reliable transmission of communication is the main subject of research in the field of modern communications. Especially for wireless LAN which uses CSMA, with the sharp increase in the number of users, some users can not access into the network because of the limited number of the system. Therefore, exploring new multiple access methods to solve the user access in dense areas is very important. In this paper, Nested Lattice coding multiple access technology is researched.For multiple access technology based on Nested Lattice coding, the information is coded by Nested Lattice code firstly, and the receiver uses Nested Lattice decoding algorithm to recover the transmitted information. Though using Nested Lattice coding multiple access technology, more than one user send the information coded by different layered Nested Lattice code at the same time-frequency resources, and the receiver take advantage of interference cancellation and Nested Lattice decoding algorithm to recover the corresponding information of each user. However, code dimension and generation matrix affect the performance of Nested Lattice coding, even more affecting the performance of the communication system with Nested Lattice coding multiple access technology. To solve above problems, the relevant factors will be analyzed firstly and multiple access based on Nested Lattice coding is designed.This paper first discusses the relevant principles of Nested Lattice coding and multiple access technology. Then, according to the principle of Nested Lattice coding, Nested Lattice codes is constructed by using different methods and parameters.The performance of different constructed method is compared. Based on the above content, the detail technique of the proposed multiple user access method is introduced, And the proposed multiple access method is simulated in this paper.