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Feedback scaling for downlink comp with orthogonal and non-orthogonal waveforms

In this paper, we study the problem of limited feedback and channel aging in the context of Filter Bank Multi-Carrier (FBMC) modulation for multi-user downlink cooperation between cells. Specifically, we investigate the robustness of FBMC in downlink Coordinated Multi Point (CoMP) scenarios with respect to standard compliant feedback link and MAC related asynchronisms such as outdated channel state information, considering also different user velocities. Previous work showed that FBMC has a better packet error rate (PER) performance compared to OFDM, leading to improved throughput performance in system level simulations. These results are shown by system simulations to be robust in scenarios with limited feedback and channel aging as well. We also provide an analytical investigation.