On OFDM and SC Transmissions in Millimeter Wave Channels with Beamforming

In this paper, a millimeter wave (mmwave) channel model from the literature similar to that for 3GPP in outdoor cellular networks is considered. In order to compensate the large path-loss at mmwave range, a sectorized beamforming model is implemented on top of the presented channel model. Correspondingly, the channel statistics, namely, delay spread and angle spread, are influenced by employing different beamwidths. Adopting this beamforming model in the mmwave channel, orthogonal frequency division multiplexing (OFDM) and single carrier frequency domain equalization (SC-FDE) systems are studied and compared. Subsequently, link level simulations are performed to visualize the system performance in different scenarios, indicating that SC-FDE using minimum mean square error (MMSE) performs close to OFDM in coded systems but accounts for much lower peak to average power ratio (PAPR).