Filtered-OFDM Enabler for Flexible Waveform in the 5th Generation Cellular Networks Conference Paper uri icon

abstract

  • 2015 IEEE. The underlying waveform has always been a shaping factor for each generation of the cellular networks, such as orthogonal frequency division multiplexing (OFDM) for the 4th generation cellular networks (4G). To meet the diversified and pronounced expectations upon the upcoming 5G cellular networks, here we present an enabler for flexible waveform configuration, named as filtered-OFDM (f-OFDM). With the conventional OFDM, a unified numerology is applied across the bandwidth provided, balancing among the channel characteristics and the service requirements, and the spectrum efficiency is limited by the compromise we made. In contrast, with f-OFDM, the assigned bandwidth is split up into several subbands, and different types of services are accommodated in different subbands with the most suitable waveform and numerology, leading to an improved spectrum utilization. After outlining the general framework of f-OFDM, several important design aspects are also discussed, including filter design and guard tone arrangement. In addition, an extensive comparison among the existing 5G waveform candidates is also included to illustrate the advantages of f-OFDM. Our simulations indicate that, in a specific scenario with four distinct types of services, f-OFDM provides up to 46% of throughput gains over the conventional OFDM scheme.

name of conference

  • 2015 IEEE Global Communications Conference (GLOBECOM)

published proceedings

  • 2015 IEEE Global Communications Conference (GLOBECOM)

altmetric score

  • 9

author list (cited authors)

  • Zhang, X. i., Jia, M., Chen, L., Ma, J., & Qiu, J.

citation count

  • 74

complete list of authors

  • Zhang, Xi||Jia, Ming||Chen, Lei||Ma, Jianglei||Qiu, Jing

publication date

  • December 2014