Title :
M-ary coded modulation by Butterworth filtering
Author :
Rusek, Fredrik ; Anderson, John B.
Author_Institution :
Dept. of Inf. Technol., Lund Univ., Sweden
fDate :
29 June-4 July 2003
Abstract :
Earlier we have studied the bandwidth and distance of binary codes created by Butterworth lowpass filtering of a pulse stream. Here the work is extended to 4- and 8-ary inputs (16- and 64-ary QAM). Performance reaches into a very narrowband part of the distance-bandwidth plane. An M-algorithm decoder is tested.
Keywords :
Butterworth filters; binary codes; decoding; low-pass filters; modulation coding; pulse modulation; quadrature amplitude modulation; 64-ary QAM; Butterworth lowpass filtering; M-algorithm decoder; M-ary coded modulation; binary code distance; code bandwidth; narrowband modulation; pulse stream; Bandwidth; Convolution; Cutoff frequency; Decoding; Filtering; Filters; Information technology; Modulation coding; Quadrature amplitude modulation; Testing;
Conference_Titel :
Information Theory, 2003. Proceedings. IEEE International Symposium on
Print_ISBN :
0-7803-7728-1
DOI :
10.1109/ISIT.2003.1228198
