Hai there !
I would suggest two books :
The first is a popular one given below, I have attached the contents for this book along with the sample chapter 1
1. Probability and Stochastic Processes
A Friendly Introduction for Electrical and Computer Engineers
Roy D. Yates and David J. Goodman
Publisher: John Wiley & Sons
The other book is
Probability Random Variables, and Stochastic Processes by Athanasios Papoulis, ISBN 0070484686.
Both the books are popular and equally good. Hope this helps !!!