Title :
Extended Hamming and BCH soft decision decoders for mobile data applications
Author :
Tapp, Thomas L. ; Luna, Amjad A. ; Wang, Xiao-an ; Wicker, Stephen B.
Author_Institution :
Rockwell Int. Corp., Cedar Rapids, IA, USA
fDate :
3/1/1999 12:00:00 AM
Abstract :
A methodology is presented for the design and development of efficient trellis-based soft decision decoders for extended Hamming and BCH codes. A new metric for noncoherent discriminator detection is proposed that substantially improves the performance of trellis-based decoders over additive white Gaussian noise (AWGN) channels. Minimal edge trellises are then presented for the class of extended Hamming codes and the (32, 21) extended BCH code. The latter is in extensive use in narrow-band wireless data systems. An automatic request (ARQ) protocol is described that allows the soft decision decoders to outperform their hard decision counterparts in both reliability and throughput
Keywords :
AWGN channels; BCH codes; Hamming codes; Viterbi decoding; automatic repeat request; block codes; continuous phase modulation; data communication; discriminators; land mobile radio; protocols; signal detection; trellis codes; ARQ protocol; AWGN channels; BCH soft decision decoders; CPM; Viterbi algorithm; additive white Gaussian noise; automatic request protocol; block codes; extended BCH codes; extended Hamming codes; extended Hamming soft decision decoder; minimal edge trellises; mobile data applications; narrow-band wireless data systems; noncoherent discriminator detection; performance; reliability; throughput; trellis-based soft decision decoders; AWGN; Additive white noise; Automatic repeat request; Block codes; Data systems; Fading; Iterative decoding; Narrowband; Protocols; Throughput;
Journal_Title :
Communications, IEEE Transactions on
