Nikolai Kolev

Dr. Nikolai Kolev graduated from Bulgarian Naval Academy in 1985 and served as an Electronics Officer in the Navy. Since 1989 he was consecutively PhD student, assistant, associate professor and Head of the Department of Electronics between 2003 - 2007. Currently, he is an associate professor at the same department. He has been lecturing courses in radio waves, antennas and microwave devices, radar and sonar. His scientific interests are in the area of radar and sonar signal processing and lately in sensor networks. Dr. Kolev has more than 30 scientific publications and is an author and coauthor of three text books and 3 patents in Bulgarian. He is also active in analog and microcontroller systems embedded design and programming in C, LabView and Matlab. Dr. Kolev has been a member of the program committee of EUSAR conference since 2002 and a reviewer of IET journals. Since 2007 he has been respectively a project coordinator and leader of two NSF projects about the development of a sonar research laboratory and sensor network for underwater surveillance.

1books edited

1chapters authored

Latest work with IntechOpen by Nikolai Kolev

The book is an edited collection of research articles covering the current state of sonar systems, the signal processing methods and their applications prepared by experts in the field. The first section is dedicated to the theory and applications of innovative synthetic aperture, interferometric, multistatic sonars and modeling and simulation. Special section in the book is dedicated to sonar signal processing methods covering: passive sonar array beamforming, direction of arrival estimation, signal detection and classification using DEMON and LOFAR principles, adaptive matched field signal processing. The image processing techniques include: image denoising, detection and classification of artificial mine like objects and application of hidden Markov model and artificial neural networks for signal classification. The biology applications include the analysis of biosonar capabilities and underwater sound influence on human hearing. The marine science applications include fish species target strength modeling, identification and discrimination from bottom scattering and pelagic biomass neural network estimation methods. Marine geology has place in the book with geomorphological parameters estimation from side scan sonar images. The book will be interesting not only for specialists in the area but also for readers as a guide in sonar systems principles of operation, signal processing methods and marine applications.

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