Synchronization sequence design for mmWave cellular systems

Designing millimeter wave (mmWave) cellular system with good coverage necessitates the use of directional beams to transmit synchronization signals in the system, and with that comes several challenges. In this paper, we present a detailed synchronization channel (SCH) design for mmWave systems. We provide a link-budget study to determine the minimum required transmit and receive beamforming gains. We also present designs for the SCH pattern in the frame structure. We design SCH sequences and show that our design provides a 3 dB better performance than LTE under similar conditions. Moreover, we propose a method is based on a genetic algorithm, to efficiently synthesize the beams required to transmit SCH.