TRELLIS FREQUENCY AND PHASE MODULATION IN FADING MOBILE SATELLITE CHANNELS
El-awady, R., Bahie-Eldin, M., Gergis, L. (1999). TRELLIS FREQUENCY AND PHASE MODULATION IN FADING MOBILE SATELLITE CHANNELS. EKB Journal Management System, 2(2nd International Conference on Electrical Engineering ICEENG 1999), 52-64. doi: 10.21608/iceeng.1999.62276
R. El-awady; M. A. Bahie-Eldin; L. F. Gergis. "TRELLIS FREQUENCY AND PHASE MODULATION IN FADING MOBILE SATELLITE CHANNELS". EKB Journal Management System, 2, 2nd International Conference on Electrical Engineering ICEENG 1999, 1999, 52-64. doi: 10.21608/iceeng.1999.62276
El-awady, R., Bahie-Eldin, M., Gergis, L. (1999). 'TRELLIS FREQUENCY AND PHASE MODULATION IN FADING MOBILE SATELLITE CHANNELS', EKB Journal Management System, 2(2nd International Conference on Electrical Engineering ICEENG 1999), pp. 52-64. doi: 10.21608/iceeng.1999.62276
El-awady, R., Bahie-Eldin, M., Gergis, L. TRELLIS FREQUENCY AND PHASE MODULATION IN FADING MOBILE SATELLITE CHANNELS. EKB Journal Management System, 1999; 2(2nd International Conference on Electrical Engineering ICEENG 1999): 52-64. doi: 10.21608/iceeng.1999.62276

TRELLIS FREQUENCY AND PHASE MODULATION IN FADING MOBILE SATELLITE CHANNELS

The International Conference on Electrical Engineering
Article 7, Volume 2, 2nd International Conference on Electrical Engineering ICEENG 1999, November 1999, Page 52-64  XML PDF (1.75 MB)
Document Type: Original Article
DOI: 10.21608/iceeng.1999.62276
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Authors
R. El-awady1; M. A. Bahie-Eldin2; L. F. Gergis3
1Prof Dr., FACULITY OF ENGINEERING MANSOURA UNIVERSITY.
2EGYPTIAN ARMED FORCES.
3Eng., FACULITY OF ENGINEERING MANSOURA UNIVERSITY.
Abstract
Most satellite communication systems are power and bandwidth-limited. In band limited nonlinear satellite applications, various researchers have shown that respectable coding gains can be achieved by Ungerboeck TCM ( trellis coded modulation ) codes [1], which improve error performance without reducing data rates or requiring more bandwidth than conventional uncoded schemes. This is achieved by channel coding with expanded sets of multilevel phase signals, such that the free Euclidean distance is maximized. A coded modulation format is defined over an expanded set of signals varying both in frequency and phase modulation ( FPM ). This special technique combines Frequency Shift Keying ( FSK ) and Phase Shift Keying ( PSK ) modulations. The FPM signal has been transmitted through nonlinear satellite transponder which exhibits amplitude and phase distortion ( AM/AM and AM/PM ), respectively, [2]. The TCM / FPM schemes demonstrate improved performance over TCM / MPSK systems on AWGN and the fading channels.
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