Performance of multiple trellis coded modulation on a vegetatively shadowed mobile satellite channel

Author

Bhaskaran, R. ; Kim, Junghwan ; Kwatra, S.C. ; Stevens, G.H.

Author_Institution

Dept. of Electr. Eng., Toledo Univ., OH, USA

fYear

1992

fDate

11-14 Oct 1992

Firstpage

1180

Abstract

A multiple trellis coded modulation (MTCM) scheme is investigated for a satellite-to-mobile downlink. In particular, the performance of a rate 4/6, multiplicity 2, trellis coded, differential 8 phase shift keying (D8PSK) scheme is investigated by computer simulation for a vegetatively shadowed (VS) channel that typifies satellite-to-mobile communications. The improvement of the MTCM over a rate of 2/3, multiplicity 1, trellis coded, D8PSK scheme and an uncoded differential quadrature phase shift keying (QPSK) scheme is also given. It is shown that in the VS channel, under average shadowing conditions, the rate 4/6 MTCM scheme performs 6 dB better than the rate 2/3 TCM scheme optimized for the additive white Gaussian noise channel at a bit error rate of 10 ^-3. The performance of the rate 4/6 MTCM scheme in the presence of channel interference and the effect of a nonlinear traveling wave tube amplifier are also investigated

Keywords

mobile radio systems; phase shift keying; radiowave propagation; satellite relay systems; telecommunication channels; trellis codes; D8PSK; MTCM; QPSK; additive white Gaussian noise channel; bit error rate; channel interference; differential 8 phase shift keying; multiple trellis coded modulation; nonlinear traveling wave tube amplifier; satellite-to-mobile communications; satellite-to-mobile downlink; uncoded differential quadrature phase shift keying; vegetatively shadowed channel; Additive white noise; Bit error rate; Computer simulation; Differential quadrature phase shift keying; Downlink; Interference; Modulation coding; Phase shift keying; Quadrature phase shift keying; Shadow mapping;

fLanguage

English

Publisher

ieee

Conference_Titel

Military Communications Conference, 1992. MILCOM '92, Conference Record. Communications - Fusing Command, Control and Intelligence., IEEE

Conference_Location

San Diego, CA

Print_ISBN

0-7803-0585-X

Type

conf

DOI

10.1109/MILCOM.1992.243950

Filename

243950