Title

High Rate Concatenated Coding Systems Using Bandwidth Efficient Trellis Inner Codes

Publication Type

Journal Article

Publication Date

5-1989

Abstract

High-rate concatenated coding systems with bandwidth-efficient trellis inner codes and Reed-Solomon (RS) outer codes are investigated for application in high-speed satellite communication systems. Two concatenated coding schemes are proposed. In one the inner code is decoded with soft-decision Viterbi decoding, and the outer RS code performs error-correction-only decoding (decoding without side information). In the other the inner code is decoded with a modified Viterbi algorithm, which produces reliability information along with the decoded output. In this algorithm, path metrics are used to estimate the entire information sequence, whereas branch metrics are used to provide reliability information on the decoded sequence. This information is used to erase unreliable bits in the decoded output. An errors-and-erasures RS decoder is then used for the outer code. The two schemes have been proposed for high-speed data communication on NASA satellite channels. The rates considered are at least double those used in current NASA systems, and the results indicate that high system reliability can still be achieved

Discipline

Information Security

Research Areas

Information Security and Trust

Publication

IEEE Transactions on Communications

Volume

37

Issue

5

First Page

420

Last Page

427

ISSN

0090-6778

Identifier

10.1109/26.24593

Publisher

IEEE

Additional URL

http://dx.doi.org/10.1109/26.24593