公开(公告)号：EP1108318B1

公开(公告)日：2011-07-27

申请号：EP99938968.7

申请日：1999-08-03

申请人： Intersil Americas Inc.

发明人： MCCALLISTER, Ronald, D. ,  BADKE, Bradley, P. ,  COCHRAN, Bruce, A.

IPC分类号： H04L27/36 ,  H04L25/03

CPC分类号： H04L25/03834 ,  H04B1/717 ,  H04B1/719 ,  H04B2201/70706 ,  H04L27/2614 ,  H04L27/2627 ,  H04L27/3411 ,  H04L27/3494 ,  H04L27/363

摘要： A constrained-envelope digital-communications transmitter circuit (22) in which a binary data source (32) provides an input signal stream (34), a phase mapper (44) maps the input signal stream (34) into a quadrature phase-point signal stream (50) having a predetermined number of symbols per unit baud interval (64) and defining a phase point (54) in a phase-point constellation (46), a pulse-spreading filter (76) filters the phase-point signal stream (50) into a filtered signal stream (74), a constrained-envelope generator (106) generates a constrained-bandwidth error signal stream (108) from the filtered signal stream (74), a delay element (138) delays the filtered signal stream (74) into a delayed signal stream (140) synchronized with the constrained-bandwidth error signal stream (108), a complex summing circuit (110) sums the delayed signal stream (140) and the constrained-bandwidth error signal stream (108) into a constrained-envelope signal stream (112), and a substantially linear amplifier (146) amplifies the constrained-envelope signal stream (112) and transmits it as a radio-frequency broadcast signal (26).