Satellite communications system utilizing parallel concatenated

Telecommunications – Carrier wave repeater or relay system – Portable or mobile repeater

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455 21, 370342, 371 374, 371 43, 375200, H04B 7185

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active

057349622

ABSTRACT:
A VSAT satellite communications network utilizes parallel concatenated coding on its inbound or outbound links, or both. For short data blocks, nonrecursive systematic tail-biting convolutional codes are used. For longer data blocks, recursive systematic convolutional codes are used. These parallel concatenated coding techniques are used in conjunction with spread-spectrum modulation to provide a VSAT communications system which meets FCC regulations on the total power spectral density of transmitted signals as well as mitigates interference from adjacent satellites.

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"Optimal Decoding of Linear Codes for Minimizing Symbol Error Rate", by Bahl, Cocke, Jelinek & Raviv, IEEE Transactions on Information Theory, pp. 284-287, Mar. 1974.
"Decision Depths of Convolutional Codes", by Anderson & Balachandran, IEEE Transactions on Information, vol. 35, No. 2, pp. 455-459, Mar. 1989.
"An Algorithmic Approach", by Anderson and Mohan, pp. 216 and 336-342.

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