Applying 6-100 GHz spectrum to mobile communications is a promising topic in 5G. In this paper, a hybrid network is presented where LTE system at low frequency works for seamless coverage and a mmWave system at 72 GHz works in hotspots for capacity enhancement. The scheme for the hybrid network includes: 1) frame structure and OFDM-based numerology for 72 GHz; 2) time-space beam switching method for beamforming; 3) zero-forcing MIMO precoding for interference cancellation; 4) a channel model based on measurements in [1] for simulation. System-level simulations show that the hybrid network can achieve the system throughput over 1600 times higher than that in 2 GHz frequency band in case of two streams. MIMO precoding is not mandatory for capacity enhancements because the effect of intra-cell interference is not severe. Thus, 72 GHz is a promising spectrum band that can well meet 5G requirements from the aspects of capacity and maximum data rate.
System Capacity of 72 GHz mmWave Transmission in Hybrid Networks
01.09.2016
324656 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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