Here is a collection of all reference books which will prove useful throughout your engineering period and furthur after that, these books are certified by pune university and are accepted universally
Signals and Systems
Text Books:
1. Simon Haykins & Barry Van Veen, “Signals and Systems”, 2nd Edition, Wiley India.
2. Simon Haykins, “Introduction to Analog & Digital Communications”, Wiley India.
Reference Books:
1. B.P. Lathi, “Linear Systems & Signals”, 2nd Edition, Oxford University Press, 2004.
2. Charles Phillips, “Signals , Systems and Transforms” , 3rd Edition, Pearson Education.
3. Peyton Peebles, “Probability, Random Variable, Random Processes”, 4th Edition, Tata Mc
Graw Hill.
You can Download these ebooks free, Just Google them.
You can refer Oxford Dictionary for some basics terms and notations
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