Hafez, MohammedArslan, Hüseyin10.07.20192019-07-1010.07.20192019-07-102015Hafez, M. ve Arslan, H. (2015). On directional modulation: An analysis of transmission scheme with multiple directions. IEEE International Conference on Communications içinde (459-463. ss.). London, England, June, 08-12, 2015 https://dx.doi.org/10.1109/ICCW.2015.72472229781467363051https://hdl.handle.net/20.500.12511/1499https://dx.doi.org/10.1109/ICCW.2015.7247222Increasing the spectral efficiency was always the motivation behind the evolution of wireless communication systems. Also, due to the widespread usage of wireless systems, securing the transmitted data rises as a main concern nowadays. Hereby, we introduce a scheme that increases the capacity of wireless systems by transmitting multiple independent data streams, while using the space domain as a source of separation. The scheme also utilizes the space domain, in order to provide a secure communication link for each of the transmitted streams. The analysis is performed by using different orders of QAM constellations, and also baseband orthogonal-frequency-division-multiplexing signal structure. The scheme shows a high randomization for the received signal along the directions out of the desired transmission beams, and fits to the standard bit-error-rate curves for all desired transmission directions. Besides, the scheme can be easily synthesized, using low complexity algorithms.eninfo:eu-repo/semantics/openAccessAntenna ArraysDirectional ModulationOFDMPhysical-Layer SecurityConference Object45946310.1109/ICCW.2015.7247222N/AN/A