Channel coding for VSAT systems

Author

Asgari, V. ; Shiva, M.

Author_Institution

Dept. of Electr. & Comput. Eng., Tehran Univ., Iran

Volume

142

Issue

5

fYear

1995

fDate

10/1/1995 12:00:00 AM

Firstpage

333

Lastpage

339

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 P_b, the upper bounds on P_b 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 P_b=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;

fLanguage

English

Journal_Title

Communications, IEE Proceedings-

Publisher

iet

ISSN

1350-2425

Type

jour

DOI

10.1049/ip-com:19952033

Filename

488017