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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...
In this paper, an efficient power allocation scheme of reference signals (RS) for uplink MU-MIMO in LTE system is introduced. In LTE system, some virtual subcarriers at the borders of the allocated bandwidth are used which invalidates the conventional power allocation schemes for uniformly placed reference signal. Further, RS for multiuser are multiplexed by cyclic shift. Constant power is required...
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