Performance Comparison of Multiband Frequencies for Outdoor Communication A comparison between the performance of C, S and Millimeter Waves (mmWaves) bands with different range of frequencies has been presented in this paper. To implement an outdoor communication network, which can satisfy the coverage requirement of signal propagation, an optimal design has been proposed using the Wireless InSite (WI) program. Comparison of measurements derived in the same outdoor environment but at different frequency bands including 28 and 73 GHz, which they related to 5G technique. The obtained results are compared according to other models with different bands including 2.4 GHz and 5 GHz for S and Cbands, respectively. These ranges of frequencies are quite important for the development of channel models in a specific area. An algorithm has been formed in this work to calculate the probability of the bestreceived points. That means the points that achieved the highest received power, highest average signal quality (ASQ) and average received power (ARP) for each frequency. The obtained results of this model showed that Sband (2.4 GHz) produce the best results in term of delay spread, path loss, received power, ASQ and ARP as compared with other frequencies. We found that increased frequency leads to increasing in the signal losses and decreasing in the received signal strength (RSS), and thus an increase in the propagation paths. These effects have resulted from the reflections from the building, where there is gradually decreasing in the network performance. In addition, we found that mmWaves frequencies cause successive losses in the paths.

Efficient transmission in the millimeter waves 28 GHz Outdoor Channel Using Spatial Multiple Access (SMA) NonOrthogonal Multiple Access (NOMA) is considered as one of the key technologies for the fifth generation (5G) of the cellular networks. However, due to the complexity of the Successive Interference, spatial multiple access (SMA) technique xe2x80x93 based on using spatial modulation for multiple antenna systems xe2x80x93 was proposed to avoid the use of successive interference cancellation. On the other hand, millimeter waves band is a promising band for 5G. this is mainly because the traditional microwave band is currently fully crowded. In this paper we investigate efficient transmission in the millimeter waves 28 GHz Outdoor Channel Using Spatial Multiple Access (SMA). Two ray fluctuating model (TRF) is used in the performance analysis for millimeter waves, as well as the limiting case of the Rayleigh channel. Analytical and simulation results show the performance of SMA over millimeter waves. Finally; the performance is shown to be improved over the more complicated NOMA with SIC