A Contemporary And Comprehensive Coverage Of The Field Of Electronic Communications, This Book Explores The Concepts Of Modern Digital And Data Communications Systems And Networks, Optical Fiber Communications Systems, Terrestrial And Satellite Radio Systems, And Both Wireline And Wireless Telephone Communications Systems. The Purpose Of The Book Is To Extend And Update The Knowledge Of The Reader, And Present The Latest Information Available In The Fast-changing Field Of Communications Technology. Significant Material Has Been Added In This Sixth Edition, Including In-depth Coverage Of: Telephone Circuits And Systems Cellular And PCS Telephone Systems Fundamental Concepts Of Data Communications And Networking Within The Text Are Numerous Examples That Emphasize The Most Important Concepts. Questions And Problems At The End Of Each Chapter, And Answers To Selected Problems At The End Of The Book Are Provided. This Text Is Suitable For Use In Under-graduate Courses In Electronics And Communication Engineering. It Requires Prior Knowledge Of Basic Electronics Principles As Well As An Understanding Of Mathematics Through The Fundamental Concepts Of Calculus.