00274nam a22001097a 4500020001800000082001800018100005700036245002600093250000800119260002700127300001000154  a9788181283436  a621.382 BAR/D  aJohn R. Barry, Edward A. Lee, David G. Messerschmitt  aDigital Communication  a3rd  bSpringer (India)c2005  a838p.