Downlink STBC-GSSK and STBC-UAV Assisted NOMA for 6G and Beyond

The increasing quantity of consumers has met the requirement to identify a winning plan for various access in the future of wireless communication. It's been observed that while utilizing the available resources, the non-orthogonal multiple access (NOMA) technique performs significantly better than any other techniques. When used widely, sequential interference can-cellation (SIC) can effectively reduce interferences; nonetheless, this is a typical scenario in NOMA. However, heavy use increases the framework's complexity, which lowers energy effectiveness. There is now interest in hybrid NOMA techniques as a way to counteract the negative aspects of the NOMA procedure. Hybrid NOMA schemes have been suggested in several recent articles as a viable substitute to mitigate the drawbacks of NOMA. Since only a portion of the overall transmit power is reserved in non-orthogonal multiple access (NOMA), cell edge users have slightly reduced spectral density. As a result, the coupled users in NOMA have a limited performance. We tackle this problem after suggesting a totally new scheme called space time block coding with generalized space shift keying (STBC-GSSK) and STBC unnamed aerial vehicle (STBC-UAV) with NOMA compatibility. The proposed scheme's spectral efficiency and outage performance were evaluated and compared to STBC-NOMA and GSSK-NOMA. The STBC-GSSK NOMA strategy has been seen to surpass all other schemes.