Title :
Performance study of trellis coded 16-QAM in nonlinear satellite channels
Author :
Gemikonakli, O. ; Aghvami, A.
Author_Institution :
King´´s Coll., London Univ., UK
Abstract :
The performance of trellis-coded 16-ary quadrature amplitude modulation signaling transmitted through a nonlinear regenerative satellite channel is studied. The bandlimited signal is distorted by a nonlinear high-power amplifier which introduces AM-AM and AM-PM conversions. Bit error rates are computed for coded 16-ary QAM and uncoded 8-ary phase-shift-keying transmissions in the presence of additive white Gaussian noise. A simple 4-state rate-3/4 convolutional encoder is assumed, and it is shown that the coded 16-ary QAM signal has about 3-dB coding gain over an uncoded 8-ary PSK signal having the same spectral efficiency, and about 8 dB over uncoded 16-ary QAM at the expense of some spectral efficiency
Keywords :
amplitude modulation; coding errors; error statistics; satellite relay systems; telecommunication channels; 8-PSK; AM-PM conversion; additive white Gaussian noise; bandlimited signal; bit error rates; coding gain; convolutional encoder; nonlinear high-power amplifier; nonlinear regenerative satellite channel; performance; spectral efficiency; trellis coded 16-QAM; Additive white noise; Artificial satellites; Bit error rate; Educational institutions; High power amplifiers; Nonlinear distortion; Phase shift keying; Quadrature amplitude modulation; Satellite broadcasting; Solid state circuits;
Conference_Titel :
Communications, 1990. ICC '90, Including Supercomm Technical Sessions. SUPERCOMM/ICC '90. Conference Record., IEEE International Conference on
Conference_Location :
Atlanta, GA
DOI :
10.1109/ICC.1990.117299
