Shrutkirthi, G.S.G.D., S.G.D.Shripathi Acharya, U.S.2026-02-0620192019 6th International Conference on Signal Processing and Integrated Networks, SPIN 2019, 2019, Vol., , p. 53-58https://doi.org/10.1109/SPIN.2019.8711723https://idr.nitk.ac.in/handle/123456789/31049In this paper, the performance of a novel non-binary Spatially Modulated Non-orthogonal Space Time Block Code (SM-NSTBC) scheme for High Altitude Platform (HAP) communication systems is designed and analyzed. SM-NSTBC utilizes full rank length n cyclic codewords derived over Galois Field (GF(q{m})), where (nvert q{m}-1 and m < n). In order to obtain higher spectral efficiencies in terms of data rate, NSTBC schemes have been devised. SM-NSTBC gives an improvement in the BER performance of ∼ 3 dB as compared to other conventional STBC-SM schemes given in literature. Monte Carlo simulations have been performed to validate the results. The computational complexity of the proposed scheme has been analytically derived and estimated. © 2019 IEEE.Eisenstein integersGaussian integersHigh Altitude Platform (HAP)multiple input multiple output (MIMO)Spatially Modulated Non-orthogonal Space Time Block Code (SM-NSTBC)