Layered sources in non-orthogonal amplify-forward relay networks

Padidar, Payam; Ho, Pin–Han; Ho, James

doi:10.1109/wcnc.2013.6555085

Cited by 1 publication

(3 citation statements)

References 8 publications

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“…Thus, we are motivated to investigate the scenario of launching layered encoded sources in a HD-NAF relay network, aiming to gain insight into the system operation and quantify its performance advantage. This paper extends our previous work on the subject in [14] by considering the general case of arbitrary number of layers over the HD-NAF relay network.…”

Section: Introductionsupporting

confidence: 52%

“…Comparing the d O k (r k )and the diversity gain of single layer HD-NAF network d * (r), given in [6] and [14], we can see that…”

Section: System Modelmentioning

confidence: 99%

“…We intend to maximize the minimum of the n + 1 terms in (14). By replacing the diversity of each layer with the value obtained in the Theorem 1 and equating all terms, we obtain…”

Section: Appendix B Proof Of Lemmamentioning

confidence: 99%

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Superposition transmission of layered encoded sources over non-orthogonal amplify-forward relay networks

Padidar

2014

2014 IEEE Wireless Communications and Networking Conference (WCNC)

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The paper investigates the broadcast of n-layered source codes over a single-relay network using a half-duplex nonorthogonal amplify-forward (HD-NAF) relaying protocol. Taking the distortion exponent, (i.e., the SNR exponent of the average end-to-end distortion) as the performance metric, we consider system operation in the high SNR regime. We first prove that the HD-NAF relay network with an n-layer code is subject to the successively refinable Diversity Multiplexing Tradeoff (DMT) curve, which is exercised to derive a closed-form expression for an achievable upper bound of the system distortion exponent. Rate allocation optimization is conducted to analyze and gain insight into system behavior. Numerical evaluations are performed based on derived analytical formulations, and the performance advantage of single-relay HD-NAF networks is justified in terms of the distortion exponent versus its conventional counterparts. Furthermore, it is observed that increases in the number of encoded layers increases system performance.

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Section: Introductionsupporting

confidence: 52%

“…Comparing the d O k (r k )and the diversity gain of single layer HD-NAF network d * (r), given in [6] and [14], we can see that…”

Section: System Modelmentioning

confidence: 99%