Title :
Binary multilevel convolutional codes with unequal error protection capabilities
Author :
Morelos-Zaragoza, Robert H. ; Imai, Hideki
Author_Institution :
LSI Logic Corp., Milpitas, CA, USA
fDate :
7/1/1998 12:00:00 AM
Abstract :
Binary multilevel convolutional codes (CCs) with unequal error protection (UEP) capabilities are studied. These codes belong to the class of generalized concatenated (GC) codes. Binary CCs are used as outer codes. Binary linear block codes of short length, and selected subcodes in their two-way subcode partition chain, are used as inner codes. Multistage decodings are presented that use Viterbi decoders operating on trellises with similar structure to that of the constituent binary CCs. Simulation results of example binary two-level CC´s are also reported
Keywords :
Viterbi decoding; binary sequences; block codes; concatenated codes; convolutional codes; linear codes; Viterbi decoders; binary linear block codes; binary multilevel convolutional codes; generalized concatenated codes; inner codes; multistage decoding; outer codes; short length codes; simulation results; trellises; two-level convolutional codes; two-way subcode partition chain; unequal error protection; Block codes; Communication systems; Concatenated codes; Convolutional codes; Decoding; Error correction codes; Hamming distance; Image communication; Speech; Viterbi algorithm;
Journal_Title :
Communications, IEEE Transactions on
