Title :
Performance evaluation of land mobile satellite system under vegetative shadowing using differential multiple TCM and QPSK
Author :
Kim, Junghwan ; Haschart, D. ; Kwatra, S. ; Vanderaar, Mark ; Stevens, G.
Author_Institution :
Dept. of Electr. Eng., Toledo Univ., OH, USA
fDate :
30 Sep-3 Oct 1990
Abstract :
A comparative analysis by computer simulation of the land mobile satellite system (LMSS) is presented for the uncoded quadrature phase shift keying (QPSK), rate 2/3 8-PSK trellis coded modulation (TCM), and rate 4/6 multiplicity 2 8-PSK TCM schemes. An analytical model is used for simulating the fading channel. The simulation results show that under Rayleigh fades, the TCM designed for the fading channel is superior to uncoded QPSK and to the conventional TCM optimized for the additive white Gaussian noise (AWGN) channel. The performance of differentially detected TCM under AWGN and fading is examined based on the preliminary results. Results of the uncoded QPSK with fading channel modeled with the empirical fade data are given
Keywords :
fading; mobile radio systems; modulation; performance evaluation; phase shift keying; satellite relay systems; telecommunication channels; 8-PSK trellis coded modulation; AWGN channel; QPSK; Rayleigh fades; additive white Gaussian noise; analytical model; computer simulation; differential multiple TCM; differentially detected TCM; fade data; fading channel; land mobile satellite system; performance evaluation; uncoded QPSK; uncoded quadrature phase shift keying; vegetative shadowing; AWGN; Analytical models; Computational modeling; Computer simulation; Fading; Mobile computing; Modulation coding; Phase modulation; Quadrature phase shift keying; Satellites;
Conference_Titel :
Military Communications Conference, 1990. MILCOM '90, Conference Record, A New Era. 1990 IEEE
Conference_Location :
Monterey, CA
DOI :
10.1109/MILCOM.1990.117426
