Title :
Generalized concatenated CPFSK modulation
Author :
Hautle, Armin ; Bossert, Martin ; Shavgulidze, S. ; Ugrelidze, Nodar
Author_Institution :
Dept. of Inf. Technol., Ulm Univ., Germany
Abstract :
Using the principles of generalized concatenation we introduce a new design for encoded M-ary CPFSK systems with modulation index h=1/M. This technique is based on a set partitioning method of inner CPFSK into nested subsystems with increasing free Euclidean distance. The subsystems are combined with several outer convolutional codes having different error-correcting capabilities. We describe a multistep decoding algorithm of generalized concatenated encoded CPFSK and give simulation results. The comparison of the generalized concatenated codes with the best known trellis-coded CPFSK schemes is also presented
Keywords :
concatenated codes; continuous phase modulation; convolutional codes; decoding; frequency shift keying; modulation coding; AWGN channel; encoded M-ary CPFSK systems; error-correcting codes; free Euclidean distance; generalized concatenated CPFSK modulation; generalized concatenated codes; inner CPFSK; modulation index; multistep decoding algorithm; nested subsystems; outer convolutional codes; set partitioning method; simulation results; subsystems; trellis-coded CPFSK; Artificial intelligence; Bandwidth; Concatenated codes; Convolutional codes; Digital communication; Euclidean distance; Information technology; Maximum likelihood decoding; Modulation; Partitioning algorithms;
Conference_Titel :
Information Theory Workshop, 1998
Conference_Location :
Killarney
Print_ISBN :
0-7803-4408-1
DOI :
10.1109/ITW.1998.706455
