Abstract:
The combination of Non-Orthogonal Multiple Access (NOMA) technology and Device-to-Device (D2D) communication technology has outstanding advantages in achieving efficient spectrum utilization and large-scale access. Aiming at the problem of single channel allocation mode and the difficulty in obtaining optimal power allocation within D2D group in existing NOMA-D2D systems, this paper constructs a joint resource allocation algorithm with D2D group and rate as the optimization target. Firstly, in terms of sub-channel allocation, this problem is converted into a bilateral matching problem, and a D2D group channel allocation algorithm based on many-to-one scenarios is proposed, Then, the difference of two convex functions (DC) programming method based on successive convex approximation is used to find the power allocation value close to the optimal one. The simulation results show that the proposed channel matching algorithm in the many-to-one scenario is superior to the one in the one-to-one scenario in terms of sum rate, and the proposed power allocation algorithm is closer to the optimal power allocation compared to the dual iterative algorithm.