In proposed communication system, digital signals transmitted efficiently over fading channel by combination of trellis coding and multiple-phase-shift keying with addition of asymmetry to signal set. Coding and modulation schemes not designed separately as in previous systems but integrated to yield bandwidth-efficient modulation and forward-error-correction coding. Helps to satisfy need for reliable high-quality transmission of voice and data between land-mobile units via satellites, where limitations of power and bandwidth imposed simultaneously. Also applicable to ionospheric communications between fixed or mobile units.
Trellis-Coded Modulation for Fading Channels
NASA Tech Briefs ; 11 , 6
01.06.1987
Sonstige
Keine Angabe
Englisch
The effect of constellation density on trellis coded modulation in fading channels
Kraftfahrwesen | 1992
|Multiple-Trellis-Coded Modulation
NTRS | 1990
|Performance of trellis-coded modulation for equalized ISI channels
Kraftfahrwesen | 1993
|Generalized Multiple-Trellis-Coded Modulation
NTRS | 1989
|Interleaving Would Enhance Trellis-Coded Modulation
NTRS | 1991
|