Superimposed Transmission for Cooperative Cellular and Cell-Free Massive MIMO Systems
arXiv:2607.12709
The paper introduces a superimposed transmission method for cooperative cellular and cell‑free massive MIMO systems, where near users receive an extra data symbol that is decoded using successive interference cancellation, improving peak spectral efficiency while keeping edge‑user fairness.
Abstract
This paper proposes a superimposed transmission strategy for cooperative cellular and cell-free massive MIMO systems. By classifying users into near and far, the base station transmits an additional data symbol for each near user, superimposed on the signals from distributed access points. Successive interference cancellation is employed at near-user receivers to decode both symbols. The proposed strategy achieves the highest peak spectral efficiency while maintaining fairness at the cell edge, thereby outperforming all the existing network configurations in system capacity.
IEEE VTC 2026 Fall