Title :
Channel coding for VSAT systems
Author :
Asgari, V. ; Shiva, M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Tehran Univ., Iran
fDate :
10/1/1995 12:00:00 AM
Abstract :
Two 8-state rate 5/6 2×8PSK TCM designed for very small-aperture-terminal (VSAT) Gaussian and fading channels (GTC and FTC systems), and eventually a system with optimum performance over the mobile-satellite (MSAT) fading channel (OFT system) is obtained. The operation of these coded systems is compared with uncoded systems over Gaussian and shadowed Rician fading channels by computer simulation. For small values of bit-error probability Pb, the upper bounds on Pb are analytically calculated by pair-state diagram. Finally, the OFT system is considered as inner code and after interleaving, is concatenated with an RS(31, 25) outer code. The simulation results show that this concatenated coding system has about 13 dB coding gain at Pb=3×10-4 over an uncoded system with the same effective information rate (QPSK modulation) on an MSAT channel
Keywords :
Gaussian channels; Reed-Solomon codes; Rician channels; VSAT networks; channel coding; concatenated codes; error statistics; fading; interleaved codes; mobile satellite communication; phase shift keying; trellis coded modulation; 8-state rate 5/6 2×8PSK TCM; Gaussian channels; MSAT; RS(31, 25) outer code; VSAT systems; bit-error probability; channel coding; coding gain; computer simulation; concatenated code; fading channels; inner code; interleaving; mobile satellite channel; pair-state diagram; shadowed Rician fading channels; upper bounds; very small aperture terminal;
Journal_Title :
Communications, IEE Proceedings-
DOI :
10.1049/ip-com:19952033
