Title :
Multi-level trellis codes for the Gaussian channel and for channels subject to impulsive noise
Author :
Calderbank, A.R.
Author_Institution :
AT&T Bell Lab., Murray Hill, NJ, USA
Abstract :
The author designs multilevel trellis codes based on lattices and cosets that provide greater immunity to Gaussian noise and/or greater resistance to impulse noise than previous approaches. He shows how to calculate minimum-squared distance and path multiplicity in terms of the norms and multiplicities of the different cosets. The multilevel structure allows the redundancy in the coset selection procedure to be allocated efficiently among the different levels. The proposed codes admit a staged decoding procedure that requires very few trellis states and has performance/complexity advantages over maximum-likelihood decoding
Keywords :
encoding; telecommunication channels; Gaussian channel; cosets; impulsive noise; lattices; minimum-squared distance; multilevel; path multiplicity; trellis codes; Block codes; Communication channels; Constellation diagram; Convolutional codes; Euclidean distance; Gaussian channels; Gaussian noise; Information theory; Maximum likelihood decoding; Modulation coding;
Conference_Titel :
Military Communications Conference, 1988. MILCOM 88, Conference record. 21st Century Military Communications - What's Possible? 1988 IEEE
Conference_Location :
San Diego, CA
DOI :
10.1109/MILCOM.1988.13462