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Performance evaluation of land mobile satellite system under vegetative shadowing using differential multiple TCM and QPSK

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5 Author(s)
J. Kim ; Dept. of Electr. Eng., Toledo Univ., OH, USA ; D. Haschart ; S. C. Kwatra ; M. J. Vanderaar
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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

Published in:

Military Communications Conference, 1990. MILCOM '90, Conference Record, A New Era. 1990 IEEE

Date of Conference:

30 Sep-3 Oct 1990