Research on PDMA communication system based on Complete Complementary Sequence

Abstract

Pattern division multiple access (PDMA) is a new non-orthogonal multiple access (NOMA) technology. It is proposed to meet the challenge of 5G large-scale connectivity and high-frequency spectral efficiency. Compared with traditional orthogonal multiple access (OMA), PDMA can support more users through the allocation of non-orthogonal resources. Due to perfect aperiodic correlation, complete complementary sequences (CCS) still has research value in 5G. In order to apply the advantages of CCS to NOMA communication system, this paper proposes a system model of CCS spread spectrum coding based on PDMA. CCS is used as spread spectrum code to improve the performance of PDMA communication system. At the same time, on the basis of spread spectrum technology, this paper analyzes the average power allocation algorithm and water-filling power allocation algorithm, and a dynamic power allocation algorithm based on the transmission rate and practical application is proposed. The simulation results show that the system model can effectively improve the performance of the system.

Physical Layer Security Based on Cascaded Multi-Modular Chaotic Logistic Map for ML-I-NOMA Image Transmission

“…In SCMA, the coded patterns of various data layer are directly mapped to the code words related to the corresponding codebook set in the time and frequency domain. In this scenario, the several data streams can share the same time-frequency resources of the signal [10]. RSMA employs the low cross-correlation characteristics of extended pseudo-random scrambling codes.…”