Title :
A coded quaternary CPM scheme for data exchange over satellite-vehicle/personal communication applications
Author :
Horikoshi, Jun ; Oku, Takayuki
Author_Institution :
Dept. of Electron. Eng., Gunma Univ., Japan
fDate :
31 Aug-2 Sep 1994
Abstract :
A coded modulation scheme named “coded QTFM” is proposed for the purpose of satellite-vehicle/personal communication facilities. QTFM is a 4-level continuous phase modulation (CPM) scheme with bandlimiting baseband LPF. Coded QTFM improves the error performance of QTFM tremendously with high coding efficiency (~0.9). Block encoding and the maximum likelihood sequence estimation is adopted in the proposed system. A simple (10,9) code improves the bit error rate to almost the same value attained by bandlimited QDPSK with raised cosine filter of roll-off factor α=1
Keywords :
block codes; continuous phase modulation; data communication; error statistics; estimation theory; frequency shift keying; land mobile radio; maximum likelihood estimation; mobile satellite communication; modulation coding; personal communication networks; (10,9) code; 4-level CPM scheme; bandlimiting baseband LPF; bit error rate; block encoding; coded QTFM; coded modulation scheme; coded quaternary CPM scheme; data exchange; error performance; maximum likelihood sequence estimation; raised cosine filter; roll-off factor; satellite-personal communication; satellite-vehicle communication; Filters; Frequency; Land mobile radio; Maximum likelihood estimation; Mobile communication; Modems; Modulation coding; Road transportation; Road vehicles; Satellite broadcasting;
Conference_Titel :
Vehicle Navigation and Information Systems Conference, 1994. Proceedings., 1994
Conference_Location :
Yokohama
Print_ISBN :
0-7803-2105-7
DOI :
10.1109/VNIS.1994.396753
