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This study presents a frequency spreading filter bank multi-carrier (FS-FBMC) waveform as a potential candidate for the fifth generation (5G) network applications at millimetre-waves (mmWaves). The proposed model is developed based on the orthogonal frequency division multiplexing (OFDM) waveform standardised by IEEE 802.15.3c for 60 GHz high data-rate applications. The effects of non-linearities of power amplifiers (PAs) at 60 GHz for both OFDM and FS-FBMC are presented and compared using a realistic PA model. In particular, the sensitivity of both transmission schemes to the non-linear effects is investigated and its impact on the performance degradation in terms of output-power-backoff, is characterised over typical indoor line-of-sight, kiosk and residential, 60 GHz IEEE channel models. The assessment metrics considered are bit error rate and out-of-band emissions. This study concludes radio access schemes for future communication generations, i.e. 5G may employ OFDM for up-link and FS-FBMC for down-link due to the sensitivity to PA non-linearities of both waveforms.

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A quasi-deterministic model for the analysis of the electromagnetic propagation and estimation of main link parameters in fixed microwave and millimeter-wave links operating within urban or suburban environments is presented. The propagation geometry is modeled by a triangular mesh from the transformation of high-resolution LIDAR data. Subsequently, an efficient physical optics approximation is employed for the estimation of the mean scattered field power from surfaces within the main beams of the antennas. Random realizations of principal reflected and scattered fields constituents superimposed to the direct field allow for the prediction of worst-case link performance, in terms of outage probability, power delay spread, and cross-polar discrimination, for different design parameters: antenna position, gain, and height. The computations are compared to measurements of fixed links at 40 GHz.Index Terms-Directive antennas, electromagnetic (EM) modeling, microwave and millimeter-wave propagation, physical optics.

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