5G Field Trials: OFDM-Based Waveforms and Mixed Numerologies Academic Article uri icon

abstract

  • 1983-2012 IEEE. Service diversity is expected in the upcoming fifth-generation (5G) cellular networks, which poses great challenges to the underlying waveforms to accommodate heterogeneous service requirements in a flexible way. By dividing the bandwidth into several subbands, each having a different numerology, this paper reports a field trial in time division duplex downlink conducted on a configurable test bed in a real-world environment for the performance evaluations of orthogonal frequency-division multiplexing (OFDM)-based 5G waveform candidates, i.e., cyclically prefixed OFDM (CP-OFDM), windowing OFDM (W-OFDM), and filtered OFDM (f-OFDM), in the presence of mixed numerologies. Field trial results confirm the feasibility of mixed numerologies and reveal the impact of several important system parameters, e.g., guard bandwidth, data bandwidth, signal-to-noise ratio (SNR), and transmit power. The results also suggest that f-OFDM outperforms CP-OFDM and W-OFDM in terms of both the spectrum efficiency and robustness in a high SNR regime, and the gain increases with a higher inter-numerology out-of-band interference. In some specific scenarios, ideal spectrum utilization can be realized by f-OFDM which completely removes the guard band.

published proceedings

  • IEEE Journal on Selected Areas in Communications

author list (cited authors)

  • Guan, P., Wu, D., Tian, T., Zhou, J., Zhang, X. i., Gu, L., ... Kishiyama, Y.

citation count

  • 105

complete list of authors

  • Guan, Peng||Wu, Dan||Tian, Tingjian||Zhou, Jianwei||Zhang, Xi||Gu, Liang||Benjebbour, Anass||Iwabuchi, Masashi||Kishiyama, Yoshihisa

publication date

  • June 2017