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Title:
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On Capacity of Gaussian â Cheapâ Relay Channel |
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Author:
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Khojastepour, Mohammad; Sabharwal, Ashutosh; Aazhang, Behnaam
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Type:
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Conference Paper |
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Keywords:
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cheap relay; gaussian; capacity |
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Citation:
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M. Khojastepour, A. Sabharwal and B. Aazhang,"On Capacity of Gaussian â Cheapâ Relay Channel," in Globecom, |
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Abstract:
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In this paper, we derive the capacity of the Gaussian
degraded â cheapâ relay channel, consisting of nodes using â cheapâ
radios operating in TDD mode when transmitting and sending in
the same frequency band. The TDD model captures a practical
limitation of most of the RF radios used in commercial wireless
systems. The proof of achievability relies on a combination of
superposition encoding and list decoding, while the converse is
derived using the min-cut max-flow theorem for networks with
â cheapâ nodes (previously derived by the authors). Even with
â cheapâ radios, our capacity analysis shows that cooperative
coding is beneficial and has a capacity advantage over direct
transmission. |
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Date Published:
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2003-12-01 |
