Linear precoding in MISO cognitive channels with degraded message sets
2012 (English)In: 2012 International ITG Workshop onSmart Antennas (WSA), IEEE conference proceedings, 2012, 119-124 p.Conference paper (Refereed)
In this work, the coexistence of a single-input single-output (SISO) primary link and a multiple-input single-output (MISO) secondary link is considered, where the secondary transmitter has non-causal knowledge of primary message and transmits both primary and secondary messages. The optimal beamforming vectors and power allocation at the secondary transmitter are derived to maximize the achievable secondary rate while satisfying the primary rate requirement. Moreover, the optimal linear precoding is obtained by semidefinite relaxation and rank-one decomposition, when the number of antennas at the secondary transmitter is larger than two. Finally, the performance of the proposed scheme is evaluated through numerical simulations.
Place, publisher, year, edition, pages
IEEE conference proceedings, 2012. 119-124 p.
Array signal processing, Cognitive radio, Radio transmitters, Receivers, Transmitting antennas, Vectors
IdentifiersURN: urn:nbn:se:kth:diva-117748DOI: 10.1109/WSA.2012.6181192ScopusID: 2-s2.0-84860473136OAI: oai:DiVA.org:kth-117748DiVA: diva2:602904
ITG Workshop on Smart Antennas (WSA), 7-8 March 2012, Dresden
FunderEU, FP7, Seventh Framework Programme, 257626
QC 2013020242013-02-042013-02-042013-02-04Bibliographically approved