A new carrier recovery circuit for land mobile satellite communication

Author

Kobayashi, K. ; Sakai, T. ; Kubota, S. ; Morikura, M. ; Kat, S.

Author_Institution

NTT Radio Commun. Syst. Lab., Kanagawa, Japan

Volume

10

Issue

8

fYear

1992

fDate

10/1/1992 12:00:00 AM

Firstpage

1306

Lastpage

1314

Abstract

A DCF (dual carrier filter) reverse-modulation-type carrier recovery circuit is proposed to achieve a low carrier skipping rate and satisfactory phase tracking performance for coherent detection of PSK (phase shift keying) signals in fast Rician fading channels. The proposed scheme employs both narrow and wide bandwidth carrier filters simultaneously for the reverse-modulation-type carrier recovery circuit. It is clarified by computer simulation that the Pe performance of a QPSK (quadriphase shift keying) modem employing the proposed scheme shows an improvement of 1.5 dB in required E_s/N_O at Pe=10⁴ (after Viterbi decoding (R=7/8, K=7), C/M (direct-to-multipath signal power ratio)=10 dB, interleaving size=64×64), compared with conventional coherent detection employing the reverse modulation tank-limiter scheme or the Costas loop scheme

Keywords

error statistics; fading; mobile radio systems; modems; phase shift keying; satellite relay systems; telecommunication channels; DCF circuit; PSK; QPSK modem; coherent detection; dual carrier filter circuit; error probabilities; fast Rician fading channels; land mobile satellite communication; low carrier skipping rate; phase tracking performance; reverse-modulation-type carrier recovery circuit; Bandwidth; Circuits; Computer simulation; Filters; Modems; Phase detection; Phase shift keying; Quadrature phase shift keying; Rician channels; Satellites;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.166758

Filename

166758