SINE/COSINE LOOK UP DEVICE OF PHASE TRACKING LOOP

摘要

PURPOSE: A sine/cosine look up device of phase tracking loop is provided to easily embody hardware by embodying phase tracking loop without using memory. CONSTITUTION: A sine/cosine look up device of phase tracking loop includes a time delay buffer(21) producing sine value after delaying inputted phase accumulated in a phase accumulation table(8). An absolute value operation table(22) takes an absolute value from inputted phase accumulated in a phase accumulation table(8). A shift operation table(23) shift operates data produced form the absolute value operation table(22). A addition table(24) produces a cosine value by adding the values from the absolute value operation table(22) and the shift operation table(23).