SoftBank Corp. (“SoftBank”) and its subsidiary HAPSMobile Inc. (“HAPSMobile”) at the moment introduced they developed a radiowave propagation simulator for Excessive Altitude Platform Station (HAPS) stratospheric-based wi-fi communication techniques. The simulator implements the “HAPS Radiowave Propagation Prediction Technique*1,” which turned a part of the Worldwide Telecommunication Union Radiocommunication Sector (ITU-R*2)’s international customary based mostly on contributions from SoftBank and HAPSMobile in October 2021. The strategy was developed to estimate radiowave interference at excessive altitudes and allow the design of community space protection for HAPS. The newly developed HAPS radiowave propagation simulator that implements this methodology will make it potential for HAPS community operators to investigate radio propagation traits with higher accuracy and effectivity for HAPS service rollouts.
To function HAPS-based networks as communications infrastructure, the correct calculation of radiowave propagation from the stratosphere to the bottom in numerous environments is a necessity, and the “HAPS Radiowave Propagation Prediction Technique” is required to make these calculations. Along with fundamental transmission loss that happens when radiowaves are propagated by free area*3, the strategy can consider radiowave propagation loss attributable to environmental elements akin to gaseous absorption and rain attenuation, diffraction as a result of terrain, vegetation loss, constructing entry loss, muddle loss as a result of constructing shielding, and human shielding loss (Determine 1).
This simulator, which implements the “HAPS Radiowave Propagation Prediction Technique”—an ITU-R international customary calculation methodology that SoftBank and HAPSMobile contributed to—encompasses the entire above-mentioned causes of radiowave propagation loss within the methodology. The simulator may analyze radiowave propagation loss by using climate information, akin to atmospheric temperatures—which fluctuate by latitude and longitude—and rainfall depth, and geographical data that features terrain and buildings, thereby making it potential to precisely analyze radiowave propagation in areas all over the world. Moreover, along with analyzing radiowave propagation in numerous areas based mostly on HAPS plane places and base station parameters (akin to spectrum and antenna patterns), propagation loss elements for consideration might be chosen as situations, and radio propagation loss analyses might be carried out based mostly on numerous calculation outcomes, akin to radiowave reception ranges.
Using this HAPS radiowave propagation simulator, SoftBank and HAPSMobile will additional research methods to conduct radiowave propagation evaluation and system design.
To bridge the digital divide and understand a society the place everyone seems to be related to ubiquitous and secure networks, SoftBank and HAPSMobile will proceed to advance HAPS enterprise preparations