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On Capacity of Gaussian â Cheapâ Relay Channel

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Title: On Capacity of Gaussian â Cheapâ Relay Channel
Author: Khojastepour, Mohammad; Sabharwal, Ashutosh; Aazhang, Behnaam
Type: Conference Paper
Keywords: cheap relay; gaussian; capacity
Citation: M. Khojastepour, A. Sabharwal and B. Aazhang,"On Capacity of Gaussian â Cheapâ Relay Channel," in Globecom,
Abstract: 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.
Date Published: 2003-12-01

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  • ECE Publications [1047 items]
    Publications by Rice University Electrical and Computer Engineering faculty and graduate students