Utilizing ATPC Scheme to Facilitate Sharing between HAPS and Terrestrial in 5.7GHz Band

The development of sharing spectrum between High Altitude Platform System (HAPS) and Terrestrial System (TS) in the 5.8GHz band is the paper main aim. This paper focuses on Automatic Transmitting Power Control (ATPC) as an interference mitigation scheme capable of utilizing the spectrum sharing between the HAPS and TS operating in the 5.8GHz band. We employ the ATPC as a fundamental mitigation technique that can reduce the trans- mission power from a HAPS airship (HAPSAS) or HAPS gate station (HAPSGS). Although customarily, the ATPC techniques have been utilized to con∞ict rain attenuation by increasing or decreasing the transmission power, we utilized it to mitigate the co-channel interference (CCI) from HAPS into the TS, since both systems operate in the spectrum below the 11GHz band with negligible rain attenuation. Hence, deep discussion on the interference analysis procedure and interference mitigation possessions from both HAPSAS and HAPSGS is done. Our paper presents the performance of an ATPC in a sharing scenario containing HAPS and TS operat- ing in the same frequency band. The performance of the TS system is evaluated based on the Interference-to-Noise Ratio (INR) level. Accordingly, results show that the adjusted power be- tween i46:1 and i13:67dBW/MHz is required for HAPS to achieve the coexistence with TS at 5.8GHz band. Our results can enhance the spectrum sharing between the two services, and thus the spectrum can be utilized more e-ciently.