Abstract
This paper proposes symbol level precoding in the downlink of a MISO cognitive system. The new scheme tries to jointly utilize the data and channel information to design a precoding that minimizes the transmit power at a cognitive base station (CBS); without violating the interference temperature constraint imposed by the primary system. In this framework, the data information is handled at symbol level which enables the characterization the intra-user interference among the cognitive users as an additional source of useful energy that should be exploited. A relation between the constructive multiuser transmissions and physical-layer multicast system is established. Extensive simulations are performed to validate the proposed technique and compare it with conventional techniques.
M. Alodeh—This work is supported by Fond National de la Recherche Luxembourg (FNR) projects, project Smart Resource Allocation for Satellite Cognitive Radio (SRAT-SCR) ID:4919957 and Spectrum Management and Interference Mitigation in Cognitive Radio Satellite Networks SeMiGod.
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© 2015 Institute for Computer Science, Social Informatics and Telecommunications Engineering
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Alodeh, M., Chatzinotas, S., Ottersten, B. (2015). Symbol Based Precoding in the Downlink of Cognitive MISO Channel. In: Weichold, M., Hamdi, M., Shakir, M., Abdallah, M., Karagiannidis, G., Ismail, M. (eds) Cognitive Radio Oriented Wireless Networks. CrownCom 2015. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 156. Springer, Cham. https://doi.org/10.1007/978-3-319-24540-9_30
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DOI: https://doi.org/10.1007/978-3-319-24540-9_30
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