Medium range backhaul feasibility under NLOS conditions at 60 GHz

This paper presents and analyzes the results of medium range propagation channel measurements with and without the presence of a reflecting obstacle at 60 GHz. Root-Mean-Square (RMS) delay spread, path loss and signal intensity are investigated. A strong relationship is found between the use of a reflector and the received signal strength. An RMS delay spread is established to help identify a possibility for InterSymbol Interference (ISI) to occur. Based on measurements held in the intersection of two corridors under non-line-of-sight (NLOS) scenario without reflector, we noticed that diffracted waves from the propagation environment were present. However, a very high loss of received signal power is noticed. In the meantime, it is found that the presence of adequate passive reflectors, strategically located, will help minimize delay spread and maximize the received energy level in NLOS scenarios. Finally, the results achieved using a reflector can be used to help design 60 GHz medium range NLOS backhaul.