Heterogeneous LTE downlink spectrum access using embedded-GFDM
Journal
2016 IEEE International Conference on Communications Workshops, ICC 2016
Pages
474-479
Date Issued
2016
Author(s)
Abstract
5G system features massive machine type communications (mMTC) participating cellular networks with different radio access technologies (RATs) for diverse applications. We investigate an LTE downlink band sharing with a 5G RAT whose subcarrier spacing is narrower than the normal subcarrier spacing (15kHz) defined in 4G OFDMA technology. This case is very important since many upcoming low-cost machines require backhaul signaling provided by widely-deployed LTE infrastructure and physical characterizations of the bands below 6 GHz for wide coverage and mobility support. However, in such heterogeneous spectrum access, the spectral sidelobe leakage caused by the legacy downlink transmission significantly interferes with the reception of the 5G signaling even when all users are perfectly synchronized. In this paper, a spectrum shaping method using embedded-GFDM waveform is therefore proposed to deal with this challenging issue. The proposed scheme warrants no impact on the signal detection of legacy receivers and gains much more spectrum efficiency compared to guard band utilization.
SDGs
Type
conference paper