00461cam a2200145 a 4500008004100000020001500041100001900056245006600075250001200141260005300153300002800206650003100234650002800265050002200293960620s1997    njua     b    001 0 eng    a01314249201 aCouch, Leon W.10aDigital and analog communication systems /cLeon W. Couch II.  a7th ed.  aUpper Saddle River, NJ :bPrentice Hall,cc2007.  axxvii, 752 p. :bill. ; 0aTelecommunication systems. 0aDigital communications.00aTK5101b.C69 1997