This book provides a comprehensive technical guide covering the fundamentals of recent research avenues, advances, and open issues in communication, including wireless, mobile, and satellite communications to the readers; new ideas and approaches to design communications systems with high performance in comparison with employed communication systems. Discussed are the problems related to cognitive radio technology and future trends in the spectrum access of next generation; advances in medium access control for cognitive radio networks; radio resources management and femtocells employment in L.T.E networks; intrusion detection in vehicular ad-hoc networks; connectivity analysis in vehicular ad-hoc networks; generalized approach to signal processing in communication systems, including wireless communications, mobile communications, and satellite communications; ultra-wide band communications principles in the extremely high frequency; communication systems with minimum symbol error rate; challenges and applications of space-time coding in multiple-input multiple output wireless communications; generalized hyper-geometric functions with applications to performance analysis; system approach to modeling communicative processes. Written by internationally recognized professors, researchers, and experts in communication systems, this book is useful for practitioners, researchers, engineers, and students.