On the Waveforms for 5G Mobile Broadband Communications

Abstract

To realize the vision of ubiquitous mobile broadband where radio access performance should not be a limiting factor for user experience, we need to access very large bandwidths, and thus consider higher frequency bands up to the millimeter wave region. Air interface design, including waveforms, is a very important component for the success of 5G mobile broadband (MBB) in terms of flexibility, energy efficiency and cost efficiency. In this paper, we compare two waveforms, orthogonal frequency division multiplexing (OFDM) and filter bank multicarrier (FBMC), in terms of these requirements. We show that OFDM is a suitable waveform for MBB due to reasonably low overhead, low cost and latency; whereas FBMC loses its spectral properties when non-linear power amplifier is used.

A Flexible Frame Structure for 5G Wide Area

“…Typically, T 1 T tti and T A/N T tti , and hence giving an idea of the re meet certain RTT requirements. As an e T tti =1ms and RTT=8ms for the downlink [6] fails in meeting the 5G latency requirement f…”

“…We start by first identifying the main requirements that influence the most on the frame structure, with special emphasis on latency constraints. Following such requirements, a flexible solution is proposed for efficient multiplexing of users having different requirements, assuming an orthogonal frequency division multiple access (OFDMA) air interface structure, where users are scheduled on a timefrequency grid of resources [6]. However, the proposed frame structure is also applicable for other candidate waveforms that offer a time-frequency symbol space for a commonly shared channel per cell.…”

5G Micro-operators for the future campus: A techno-economic study

“…If future requirements of100 Mbps data rate available per user and this will be possible by going towards higher frequencies and using wider bandwidths. Ongoing studies on 5G waveforms have shown that spectral efficiencies of 7.2 bps/Hz, that is, double that of 4G are possible for 5G [10]. Next step should be to increase the bandwidth and with having 5 times increase in the bandwidth from 20 MHz to 100 Mhz, a total 10 times increase can be expected in the data rate.…”

Proposal for distribution of a low-phase-noise oscillator signal in forthcoming fifth-generation mobile network by radio-over-fibre technology

“…Different modulation schemes and multiplexing techniques are proposed for spectra saving and increasing the wireless system's capacity [4], [5]. In all these cases it is clear that the phase noise of the transmitted signal is playing an important role [6].…”