Spectrum Sensing of Orthogonal Space-Time Block Coded Signals with Multiple Receive Antennas
2010 (English)In: Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), IEEE , 2010, 3110-3113 p.Conference paper (Other academic)
We consider detection of signals encoded with orthogonal space-time block codes (OSTBC), using multiple receive antennas. Such signals contain redundancy and they have a specific structure, that can be exploited for detection. We derive the optimal detector, in the Neyman-Pearson sense, when all parameters are known. We also consider unknown noise variance, signal variance and channel coefficients. We propose a number of GLRT based detectors for the different cases, that exploit the redundancy structure of the OSTBC signal. We also propose an eigenvalue-based detector for the case when all parameters are unknown. The proposed detectors are compared to the energy detector. We show that when only the noise variance is known, there is no gain in exploiting the structure of the OSTBC. However, when the noise variance is unknown there can be a significant gain.
Place, publisher, year, edition, pages
IEEE , 2010. 3110-3113 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-51745DOI: 10.1109/ICASSP.2010.5496088ISI: 000287096003014OAI: oai:DiVA.org:liu-51745DiVA: diva2:277283
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Erik Axell and Erik G. Larsson, Spectrum Sensing of Orthogonal Space-Time Block Coded Signals with Multiple Receive Antennas, 2010, Proceedings of the 35th IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP'10).