Publikationsdatum:
2011-08-19
Beschreibung:
Some new short constraint length codes are described for satellite channels which are constant-envelope and which have spectral and energy efficiencies intermediate to other recent coded techniques, namely r = 2/3 coded 8-PSK and r = 3/4 coded 16-PSK. Two intervals of 8-PSK transmission are used to form a modulation base for r = 5/6 Trellis codes. A particularly attractive design is an eight-state code, producing 6.2 dB gain on the Gaussian channel over uncoded 8-PSK, yet sacrificing only 16 percent in spectral efficiency.
Schlagwort(e):
COMMUNICATIONS AND RADAR
Materialart:
IEEE Transactions on Communications (ISSN 0090-6778); Com-34; 1045-104
Format:
text
