The evolution to denser radio access network (RAN) with small cells in cluttered urban environments increases the need for wireless non-line-of-sight (NLOS) backhaul. A novel NLOS backhaul solution is designed that is optimized for coexistence with TD-LTE radio access. The NLOS backhaul solution is based on TD-LTE air-interface for fast development but with critical modifications and improvements to meet all the technical requirements of wireless backhaul. The system is targeted for unprecedented 10 bits/s/Hz spectral efficiency through 256-QAM, concatenated turbo and Reed-Solomon (RS) coding, and 2x2 MIMO techniques. This paper discusses the key design concepts of the air-interface with simulation results in NLOS channels.
['June Chul Roh', 'Pierre Bertrand', 'Adam Yao', 'Chen Mo']
NLOS Backhaul PHY Optimized for Small Cells