Research Article
Symbol Based Precoding in the Downlink of Cognitive MISO Channel
@INPROCEEDINGS{10.1007/978-3-319-24540-9_30, author={Maha Alodeh and Symeon Chatzinotas and Bj\o{}rn Ottersten}, title={Symbol Based Precoding in the Downlink of Cognitive MISO Channel}, proceedings={Cognitive Radio Oriented Wireless Networks. 10th International Conference, CROWNCOM 2015, Doha, Qatar, April 21--23, 2015, Revised Selected Papers}, proceedings_a={CROWNCOM}, year={2015}, month={10}, keywords={Constructive interference Underlay cognitive radio MISO system}, doi={10.1007/978-3-319-24540-9_30} }- Maha Alodeh
Symeon Chatzinotas
Björn Ottersten
Year: 2015
Symbol Based Precoding in the Downlink of Cognitive MISO Channel
CROWNCOM
Springer
DOI: 10.1007/978-3-319-24540-9_30
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.