If you have 3 days before your semester exam, Anand Kumar is your survival guide. If you have 3 months to truly learn the subject, use Oppenheim + Kumar .
by A. Anand Kumar is widely regarded as a foundational textbook for undergraduate students pursuing degrees in Electrical, Electronics and Communication, and Telecommunication engineering. Published by PHI Learning , the third edition continues to be a staple for those seeking a student-centred approach to complex engineering theories. Key Features and Pedagogical Approach Signals And Systems By Anand Kumar.pdf