This book is primarily designed for senior undergraduate students, postgraduates,
researchers, and industry personnel working in the areas of signal processing, nextgeneration wireless communication, and detection and estimation. The book will
introduce readers to cognitive radio and the recent research in its main functionality,
that is, spectrum sensing. The cognitive radio is the essential enabling technology for
next-generation wireless communication like 5G and beyond. It guides the readers
from the basic spectrum sensing algorithm for narrowband spectrum sensing to the
more advanced wideband spectrum sensing, including cooperative sensing. In addition to that, the book discusses practical issues associated with implementing them
in practice, like fading and noise uncertainty. Each chapter is equipped with rich
mathematical proofs and derivations. We have also added appendices to help readers
understand and derive the equations used in different chapters of the book.