Simulation and Hardware Implementation for the Downlink Power-Domain Non-Orthogonal Multiple Access System

• Main Authors: TSAI, YUN-TING, 蔡昀廷
• Other Authors: LIU, TSUNG-HSIEN
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/4mba5d

碩士 === 國立中正大學 === 通訊工程研究所 === 107 === The bandwidth and spectrum efficiency in wireless communication are related to the number of users and the data rate of each user. Compared to the frequency division multiple access (FDMA), time division multiple access (TDMA), code division multiple access (CDMA), orthogonal frequency division (OFDMA), the new non-orthogonal multiple access (NOMA) technology enables multiple users to share wireless resources in a single time/frequency resource block to increase spectrum efficiency and data throughput. However, when multiple users share the same wireless resources, they cause mutual interference to one another. Among the many NOMA schemes, the simple power-domain NOMA technology is explored in this thesis. A scenario of two users is considered. At the transmitter side, superposition coding (SC) of signals for two users is applied. One strong user is located at the cell center, and, the other weak user is located at the cell edge. At the receiver side, successive interference cancellation (SIC) is applied to detect the users. Simulation results for the two users with different power allocation and modulation schemes are reported. The transmitter and receiver for the NOMＡ technique are designed under the Simulink environment. The designed Simulink model is converted by the HDL coder. The generated HDL code is download to the Zedboard FPGA for hardware simulation. Finally, the HDL code is also synthesized by TSMC 90 nm CMOS technology.