Satellite communications system utilizing parallel concatenated coding

摘要

A VSAT satellite communications network utilizes parallel concatenated coding (28,48) on its inbound or outbound links (20,22), 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 (32,44) 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.