Rate 3/4 Convolutional Coding of 16-PSK: Code Design and Performance Study

Author

Wilson, Stephen G. ; Sleeper, Harry A., II ; Schottler, Paul J. ; Lyons, Mark T.

Author_Institution

Virginia Univ., Charlottesville, VA, USA

Volume

32

Issue

12

fYear

1984

fDate

12/1/1984 12:00:00 AM

Firstpage

1308

Lastpage

1315

Abstract

Convolutional coding coupled with 16-PSK modulation is investigated for bandwidth efficient transmission. Rate 3/4, small memory codes are found which are optimized in the free-distance sense on the Gaussian channel. These codes provide up to 4.8 dB of coding gain with 32 states over uncoded 8-PSK, a scheme having the same spectral efficiency as the codes described. The performance is compared with earlier findings of Ungerboeck and some recent results on $R = 2/3$ coded 8-PSK. In addition, we present results of a channel transmission study to assess the performance of the four-state code on the band-limited nonlinear channel, and find that performance of the coded scheme degrades comparably with uncoded 8-PSK, i.e., coding gain is roughly preserved.

Keywords

Convolutional coding; Phase-shift keying; Bandwidth; Convolution; Convolutional codes; Couplings; Gaussian channels; Modulation coding; Performance gain; Phase shift keying; Quadrature phase shift keying; Satellites;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOM.1984.1096002

Filename

1096002