Multi-antenna spectrum sensing by exploiting spatio-temporal correlation
2014 (English)In: EURASIP Journal on Advances in Signal Processing, ISSN 1687-6172, E-ISSN 1687-6180, 160- p.Article in journal (Refereed) Published
In this paper, we propose a novel mechanism for spectrum sensing that leads us to exploit the spatio-temporal correlation present in the received signal at a multi-antenna receiver. For the proposed mechanism, we formulate the spectrum sensing scheme by adopting the generalized likelihood ratio test (GLRT). However, the GLRT degenerates in the case of limited sample support. To circumvent this problem, several extensions are proposed that bring robustness to the GLRT in the case of high dimensionality and small sample size. In order to achieve these sample-efficient detection schemes, we modify the GLRT-based detector by exploiting the covariance structure and factoring the large spatio-temporal covariance matrix into spatial and temporal covariance matrices. The performance of the proposed detectors is evaluated by means of numerical simulations, showing important advantages over existing detectors.
Place, publisher, year, edition, pages
2014. 160- p.
Cognitive radio, Generalized likelihood ratio test (GLRT), Multi-antenna, Spatio-temporal correlation
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-158827DOI: 10.1186/1687-6180-2014-160ISI: 000345392900001ScopusID: 2-s2.0-84911945039OAI: oai:DiVA.org:kth-158827DiVA: diva2:783574
QC 201501262015-01-262015-01-122015-04-24Bibliographically approved