Adaptive and Spatial Processing for Millimeter Wave Backhaul Architectures

This paper presents advanced spatial focusing algorithms and their performance covering fixed and mobile hotspots (HS) for backhaul within the context of millimeter wave (mmWave) overlay networks. For Fixed HS (FHS), Time Reversal (TR) and Equal Gain Transmission (EGT) techniques are recommended and optimized under Multiple Input Single Output (MISO) deployments within the context of Wi-Fi HS extensions operating at 60 GHz. For Mobile HS (MHS) scenarios, adaptive and switching beamforming (BF) techniques are investigated and evaluated to track HS combining Long Term Evolution-Advanced (LTE-A) and mmWave transmissions using the IEEE802.11ad and IEEE802.15.3c standards. Link budget are performed for those scenarios, proving feasibility of mmWave and Wi-Fi backhauling for future fifth generation (5G) networks.