A Sparse Interleaved Multiple Access Method

Abstract

The invention discloses a sparse interleave division multiple access method and belongs to the technical field of non-orthogonal division multiple access mobile communication. The method comprises the steps of assuming that totally K resource particles and T time frequency symbols are occupied when all access users transmit data blocks; carrying out channel coding on data block information transmitted by each user; segmenting the coded data into a plurality of sub-bit streams and mapping the sub-bit streams into codon vectors; carrying out zero padding on each codon vector to obtain a K-dimension sparse codon vector; obtaining a K-dimension sparse sending codon vector according to a sparse time frequency interleaver; at each moment, transmitting a corresponding component in the sending codon vector by each user according to a transmission resource provided by a system; estimating active users and channel gains by a receiver and obtaining sparse time frequency interleaver information of the active users; and decoding to obtain the sent data block of each access user by the receiver. According to the method, when each user accesses transmission, only a small part of total time frequency resources is occupied, and the multi-user detection complexity of the receiver in a large-scale access scene is reduced.

Description

technical field [0001] The invention relates to the technical field of non-orthogonal multiple access mobile communication, and specifically proposes a sparse interleave division multiple access method (Sparse Interleave Division Multiple Access, SIDMA). Background technique [0002] Due to problems such as multiple access interference (MAI) and inter symbol interference (inter symbol interference, ISI) in the traditional code division multiple access method (CDMA), its performance is limited. The main focus of existing research is to propose a new multi-user detection method (multi-userdetection, MUD) to reduce the impact of MAI and ISI on performance. In several documents, it is proposed to improve the performance by allocating different interleavers to different users, so there is a traditional interleaved multiple access method (interleave division multiple access, IDMA). It not only has the advantages of traditional CDMA, that is, resists fading through diversity, and ...

AI Technical Summary

Problems solved by technology

But in general, in the case of large-scale user access, the existing methods generally face the problem of high computational complexity

Images