Symbol-aided plus decision-directed reception for PSK/TCM modulation on shadowed mobile satellite fading channels

Author

Irvine, Garrick T. ; McLane, Peter J.

Author_Institution

Dept. of Electr. Eng., Queen´´s Univ., Kingston, Ont., Canada

Volume

10

Issue

8

fYear

1992

fDate

10/1/1992 12:00:00 AM

Firstpage

1289

Lastpage

1299

Abstract

The symbol-aided (SA) synchronization concept developed by Moher and Lodge (1989) is applied to the MSAT channel modeled with a shadowed Rician process. Simulation data demonstrate that it can track the severe phase jitter encountered on the fading channel free of the false lock which plagues conventional techniques. The algorithm multiplexes known symbols into the data stream, establishing an absolute reference free of decision errors that is used to estimate the fading phase. An improvement to the SA algorithm which extracts phase information from the data-bearing symbols is proposed. It is found that the new technique is more effective for larger K. The improved algorithm is referred to as symbol-aided plus decision-directed (SADD) phase estimation. A system employing SADD phase estimation, trellis-coded modulation, interleaving, and amplitude weighting within the Viterbi decoder yielded the best BER performance on the shadowed MSAT channel considered

Keywords

error statistics; fading; mobile radio systems; phase shift keying; radio reception; satellite relay systems; synchronisation; telecommunication channels; trellis codes; BER performance; MSAT channel; PSK/TCM modulation; SA algorithm; SADD phase estimation; Viterbi decoder; amplitude weighting; interleaving; phase jitter; shadowed Rician process; shadowed mobile satellite fading channels; symbol-aided plus decision-directed reception; trellis-coded modulation; Amplitude modulation; Data mining; Fading; Interleaved codes; Jitter; Phase estimation; Phase modulation; Phase shift keying; Rician channels; Viterbi algorithm;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.166756

Filename

166756