Title :
Two-stage Doppler-phasor-corrected TCM/DMPSK for shadowed mobile satellite channels
Author_Institution :
Dept. of Electr. Eng., Queen´´s Univ., Kingston, Ont., Canada
fDate :
8/1/1993 12:00:00 AM
Abstract :
A two-stage Doppler-phasor correction algorithm for mobile satellite, DSP-based modems is presented. The modulation considered is trellis-coded, differential phase-shift keying (DPSK) involving eight signal points. The Doppler phasor rather than the Doppler frequency is corrected as it leads to easy realization in DSP-based software. The Doppler phasor correction algorithm that is presented has a setup mode where the data are known and a data mode where the data are unknown. As such, it is intended for stream data or digital speech transmission. Both computer simulation and analytical techniques are used in the performance analysis
Keywords :
Doppler effect; mobile radio systems; modems; phase shift keying; satellite relay systems; telecommunication channels; trellis codes; DPSK; DSP-based modems; Gaussian channel; TCM/DMPSK; computer simulation; differential phase-shift keying; digital speech transmission; performance analysis; shadowed mobile satellite channels; stream data; trellis coded modulation; two-stage Doppler-phasor correction algorithm; Computer simulation; Differential quadrature phase shift keying; Digital signal processing; Fading; Frequency; Modems; Performance analysis; Satellites; Signal processing algorithms; Speech;
Journal_Title :
Communications, IEEE Transactions on
