## 8 Conclusions  
Recent advancement in technologies has urged 5G developing organizations to work on the mmWave frequency spectrum in order to satisfy needs of users. The use of the mmWave frequency signal spectrum offers a larger amount of bandwidth because these sections of the spectrum have not been used before for mobile communication. In order to practically implement the 5G mmWave network in the real-world scenario, the behavior of signal propagation among various channel conditions have been determined. Considering this, this paper discusses the results of outdoor measurement at 38 GHz for two different CI and FI path loss models. The featured measurement outputs of LOS and NLOS for co- and cross-antenna polarizations were conducted at Universiti Teknologi Malaysia (UTM), Kuala Lumpur campus. Outcomes were gathered from simulation and real-world measurements to evaluate the system performance by representing several key factors, including cell-edge user throughput, average user throughput, fairness index, average cell throughput, and spectral efficiency for different numbers of users. The outcomes were examined at varied antenna configurations as well as at different channel bandwidths to proof the enhancement of overall network performance. For the CI model, the  
Figure 14: Overall network performance for CI model at different bandwidths.  
Figure 15: Overall network performance for FI model at different bandwidths.  
LOS case measurement results for the PLE values were 3.0990 for V-V and 4.2556 for V-H configurations. Whereas, for the NLOS, the PLE values were 4.3202 and 4.214 for the V-V and V-H configurations, respectively. In the FI model, although it delivered significant results for the LOS case, its overall performance was poorer, as compared with the NLOS case for both V-V and V-H configurations. Moreover, the simulation results proved that the user throughputs for cross-polarization configuration decayed faster than the co-polarization for both the LOS and NLOS environments. However, the overall findings for the FI path loss model appeared to be lower than the CI path loss model, but the FI path loss model predicted a significant amount of performance that seemed suitable for some small cell LOS V-V scenarios. We believe that our findings presented in the paper are convenient and handy to test and implement the future generation 5G communication network for real-life environments. For future work, other potential 5G mmWave frequency spectra, such as 60 GHz and 70 GHz, will be studied. The spectra of such frequencies can utilize some of the optimal path loss propagation models, such as close-in with frequency weighted (CIF) and alpha-beta-gamma (ABG) models. We will investigate the influence of various beam-forming effects and will analyze their outcome on different massive MIMO conditions.  
The data used to support the findings of this study are available from the corresponding authors upon request.  
[PERSON] and [PERSON] conceived and designed the experiments; [PERSON] and [PERSON] performed the experiments; [PERSON], [PERSON] and [PERSON] analyzed the data; [PERSON], [PERSON], [PERSON], [PERSON], and [PERSON] contributed materials/reagents/analysis tools; [PERSON] and [PERSON] wrote the paper.  
The authors would like to acknowledge the University of Malaya (UM) grant: RK013-2018.  
The authors would also like to thank the Universiti Teknologi Malaysia (UTM) Wireless Communication Centre (WCC) for their support.  
The authors declare no conflict of interest.