Godkhindi Shrutkirthi, S.G.D., G.D.Shripathi Acharya, U.2026-02-062020Lecture Notes in Electrical Engineering, 2020, Vol.648, , p. 85-9218761100https://doi.org/10.1007/978-981-15-2926-9_10https://idr.nitk.ac.in/handle/123456789/30809This paper analyzes the performance of Spatially Modulated Non-orthogonal Space Time Block Code (SM-NSTBC) scheme for a correlated high altitude platform (HAP) MIMO system in the presence of imperfect channel state information (Imp-CSI). The proposed SM-NSTBC employs cyclic codewords derived over Galois Field, which satisfies full rank property. The performance of SM-NSTBC is compared with traditional STBCs such as SM-OSTBC and STBC-SM schemes. It is observed through simulations that SM-NSTBC outperforms SM-OSTBC and STBC-SM schemes by a minimum of 2 dB in HAP correlated environments. Monte-Carlo simulations have been performed to validate the claims. © 2020, Springer Nature Singapore Pte Ltd.High Altitude Platform (HAP)Imperfect Channel State Information (Imp-CSI)Spatially Modulated Non-orthogonal Space Time Block Code (SM-NSTBC)