Rate-Splitting Based Transmission Strategy Design in FDD-Based System

Abstract

To enhance the multiplexing gain, rate-splitting (RS) strategy has been proposed recently, which splits user message into a common and a private part, and transmits signals simultaneously after superposition. In this paper, firstly, we develop a scheme to split message and pack all common parts into a super common message from engineering point of view. Then, we apply RS in FDD-Based link-level platform to examine throughput performance, where LTE-A protocol codebook is considered to quantize channel. Moreover, a novel power allocation algorithm using polynomial regression is proposed. Simulation results demonstrate the performance gains of the proposed scheme.