Faculty Publications
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Item A MIMO SM-NSTBC Scheme for High Altitude Platform Communication Systems: Study and Analysis(Institute of Electrical and Electronics Engineers Inc., 2019) Shrutkirthi, G.S.; G.D., S.G.D.; Shripathi Acharya, U.S.In 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.Item Performance of SM-NSTBC for Correlated HAP Fading Channels with Imperfect-CSI(Springer, 2020) Godkhindi Shrutkirthi, S.; G.D., G.D.; Shripathi Acharya, U.This 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.