Cooperative Relay Transmission Strategy and Optimization in Rate-Splitting Multiple Access System
A cooperative relay transmission strategy based on rate-splitting multiple access for two-user systems is presented.Firstly, a system efficiency function is designed to evaluate the energy cost of cooperative rate-splitting multiple access systems in a more comprehensive manner.Secondly, to maximize system efficiency, precoding matrices, common rate allocation, transmit power, and time allocation are jointly optimized.Then, We utilize methods such as golden section search and successive convex approximation to transform the non-convex problem into a convex one for solution.The simulation results show that compared with the benchmark scheme, the proposed scheme can achieve higher system efficiency.
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