Throughput Improvement through FTN-based MIMO Signaling in Fixed Wireless Access

With the increased capacity of access links following 5G, a high-capacity backhaul through fixed wireless access (FWA) has become crucial. In this study, we propose a method for FWA to increase throughput by applying faster-than-Nyquist (FTN) signaling, which can increase the transmission speed by com-pressing the symbol period without expanding the transmission bandwidth. Specifically, under the line-of-sight (LoS) conditions assumed for FWA, we realize spatially multiplexed transmission (MIMO) without inter-stream interference based on antenna placement conditions and apply FTN to each stream to improve transmission speed. For performance evaluation, from a practical viewpoint, the effects of nonlinear amplification are considered, and the effectiveness of the proposed method is evaluated through computer simulations in comparison with Nyquist signaling.