On the SOVA for extremely high code rates over partial response channels Academic Article

abstract

• In this paper, we extend the derivation of the iterative soft-output Viterbi algorithm (SOVA) for partial response (PR) channels, and modify its decoding process such that it works consistently for arbitrary high code rates, e.g., rate 64/65. We show that the modified SOVA always outperforms the conventional SOVA that appears in the literature with a significant difference for high code rates. It also offers a significant cut down in the trace-back computations. We further examine its performance for parallel and serial concatenated codes on a preceded Class IV partial response (PR4) channel. Code rates of the form k0/k0+1 (k0 = 4, 8, and 64) are considered. Our simulations indicate that the loss suffered by the modified SOVA, relative to the APP algorithm, is consistent for all code rates and is at most 1.2 dB for parallel concatenations and at most 1.6 dB for serial concatenations at Pb = 10-5.

authors

• Ghrayeb, Ali

published proceedings

• Journal of Communications and Networks

author list (cited authors)

• Ghrayeb, A.

citation count

• 3

complete list of authors

• Ghrayeb, Ali

publication date

• March 2003

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

published in

• Journal of Communications and Networks  Journal

keywords

• 40 Engineering
• 4006 Communications Engineering
• 46 Information And Computing Sciences

Digital Object Identifier (DOI)

• 10.1109/jcn.2003.6596674

start page

• 1

end page

• 6

volume

• 5

issue

• 1

URL

• http://dx.doi.org/10.1109/jcn.2003.6596674