NDLI: Design and implementation of the 155 Mbps adaptive modem for broadband satellite communications

Content Provider	IEEE Xplore Digital Library
Author	Eun-A Choi Dae-Ig Chang Nae-Soo Kim
Copyright Year	2002
Description	Author affiliation: Broadband Wireless Commun. Res. Dept., Electron. & Telecommun. Res. Inst., Taejon, South Korea (Eun-A Choi; Dae-Ig Chang; Nae-Soo Kim)
Abstract	We present the design and implementation of a 155 Mbps satellite modem adaptively compensated against rain attenuation. In order to compensate rain attenuation over a high-speed satellite link, adaptive coding schemes with variable coding rates and pragmatic TCM, that can decode both QPSK and TC-8PSK using the same Viterbi decoder, are studied and analyzed. The pragmatic TCM with rate 2/3, selected as the optimal parameters for implementation, is modeled by VHDL. The key design issues are how to achieve a high data rate and how to integrate into a single ASIC chip various functions such as different data rates, scrambler/descrambler, interleaver, encoder/decoder, and BPSK/QPSK/8PSK modulator/demodulator. The implemented 155 Mbps adaptive modem has simplified interface circuits among the many functional blocks, and parallel processing architecture to achieve the high data rate. This 155 Mbps adaptive modem was designed and implemented by a single ASIC chip with the 0.25 /spl mu/m CMOS standard cell technology.
Starting Page	1053
Ending Page	1057
File Size	543304
Page Count	5
File Format	PDF
ISBN	0780374428
ISSN	13476890
DOI	10.1109/WPMC.2002.1088339
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Application specific integrated circuits Rain Modems Attenuation CMOS technology Broadband communication Decoding Satellite communication Quadrature phase shift keying Adaptive coding
Content Type	Text
Resource Type	Article

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