Finite-SNR diversity-multiplexing trade-off of dual hop relay channels

Ying Liu, Prathapasinghe Dharmawansa, Matthew R. McKay, Khaled Letaief

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

We analyze the diversity-multiplexing trade-off (DMT) of fixed-gain amplify-and-forward (AF) protocols for the dual hop relay channel. Contrary to most prior work, we characterize the finite signal-to-noise ratio (SNR) DMT using a non-asymptotic framework. Our results are based on a new exact closed-form expression which we derive for the distribution of the received SNR, which takes into account the direct transmission link. We also extract the conventional asymptotic DMT as a special case of the finite-SNR result, and demonstrate that the asymptotic DMT can significantly overestimate the level of diversity that is achievable for practical error rates and SNRs. We also present the finite-SNR DMT for decode-and-forward (DF) relaying protocols, and show the interesting result that fixed-gain AF outperforms DF at low SNR.

Original languageEnglish
Title of host publicationISITA/ISSSTA 2010 - 2010 International Symposium on Spread Spectrum Techniques and Applications
Pages6-11
Number of pages6
DOIs
Publication statusPublished - 2010
Externally publishedYes
Event2010 20th International Symposium on Information Theory and Its Applications, ISITA2010 and the 2010 20th International Symposium on Spread Spectrum Techniques and Applications, ISSSTA2010 - Taichung, Taiwan, Province of China
Duration: 17 Oct 201020 Oct 2010

Other

Other2010 20th International Symposium on Information Theory and Its Applications, ISITA2010 and the 2010 20th International Symposium on Spread Spectrum Techniques and Applications, ISSSTA2010
CountryTaiwan, Province of China
CityTaichung
Period17/10/1020/10/10

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

Liu, Y., Dharmawansa, P., McKay, M. R., & Letaief, K. (2010). Finite-SNR diversity-multiplexing trade-off of dual hop relay channels. In ISITA/ISSSTA 2010 - 2010 International Symposium on Spread Spectrum Techniques and Applications (pp. 6-11). [5651691] https://doi.org/10.1109/ISSSTA.2010.5651691