Journal Pre-proof Wideband spectrum sensing in cognitive radio using discrete wavelet packet transform and principal component analysis P.Y. Dibal, E.N. Onwuka, J. Agajo, C.O. Alenoghena PII: S1874-4907(19)30464-1 DOI: https://doi.org/10.1016/j.phycom.2019.100918 Reference: PHYCOM 100918 To appear in: Physical Communication Received date : 16 June 2019 Revised date : 30 October 2019 Accepted date : 31 October 2019 Please cite this article as: P.Y. Dibal, E.N. Onwuka, J. Agajo et al., Wideband spectrum sensing in cognitive radio using discrete wavelet packet transform and principal component analysis, Physical Communication (2019), doi: https://doi.org/10.1016/j.phycom.2019.100918. This is a PDF ﬁle of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the deﬁnitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its ﬁnal form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. © 2019 Published by Elsevier B.V.