Comparing Two-way Relay Protocols for Satellite Communication
نویسندگان
چکیده
Protocols applicable to bidirectional data transfer via satellite between two earth terminals are analyzed with respect to their achievable rate regions, an information-theoretic comparison. Protocols include amplify-forward, requiring no special satellite processing, and several variations of decode-forward, which necessitate satellite demodulation, decoding, and re-encoding. All such protocols seek to increase the spectral efficiency, by as much as 100%, over conventional two-way communication. In addition to comparing the basic protocol efficiency on transfer rate limits given certain power and bandwidth resources, the protocols are characterized in terms of complexity and operational feasibility. Amplify-forward and a protocol called MACnested coding emerge as preferred candidates.
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