Title :
Pragmatic unequal error protection coded schemes for satellite communications
Author :
Taricco, Giorgio ; Biglieri, Ezio
Author_Institution :
Politecnico di Torino, Italy
Abstract :
Unequal error protection designs based on multilevel coded modulation are presented for digital satellite transmission. Due to channel nonlinearity, the signal constellations chosen must have constant envelope, so that signaling schemes derived from PSK should be used. Four schemes of limited complexity are chosen for investigation. They are based on the same “pragmatic” approach used by Viterbi et al. (see IEEE Commun. Magazine, vol.27, no.7, p.11-19, July 1989). Their performance is analyzed over the AWGN and Rician fading channel. An asymptotic analysis based on a modified transfer function and dealing with different bit classes is proposed. The schemes found to be asymptotically best are further studied by simulation to assess their performance at intermediate bit error rates
Keywords :
Gaussian channels; Rician channels; digital radio; error correction codes; error statistics; fading; modulation coding; phase shift keying; satellite communication; trellis coded modulation; AWGN channel; PSK; Rician fading channel; TCM; asymptotic analysis; channel nonlinearity; constant envelope signals; digital satellite transmission; intermediate bit error rates; modified transfer function; multilevel coded modulation; performance analysis; pragmatic approach; satellite communications; signal constellations; signaling schemes; unequal error protection; AWGN; Constellation diagram; Digital modulation; Error correction codes; Modulation coding; Performance analysis; Phase shift keying; Rician channels; Satellites; Viterbi algorithm;
Conference_Titel :
Global Telecommunications Conference, 1996. GLOBECOM '96. 'Communications: The Key to Global Prosperity
Conference_Location :
London
Print_ISBN :
0-7803-3336-5
DOI :
10.1109/GLOCOM.1996.586738
