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Diversity embedded space-time codes

Publication ,  Journal Article
Diggavi, SN; Calderbank, AR; Dusad, S; Al-Dhahir, N
Published in: IEEE Transactions on Information Theory
January 1, 2008

Rate and diversity impose a fundamental tradeoff in wireless communication. High-rate space-time codes come at a cost of lower reliability (diversity), and high reliability (diversity) implies a lower rate. However, wireless networks need to support applications with very different quality-of-service (QoS) requirements, and it is natural to ask what characteristics should be built into the physical layer link in order to accommodate them. In this paper, we design high-rate space-time codes that have a high-diversity code embedded within them. This allows a form of communication where the high-rate code opportunistically takes advantage of good channel realizations while the embedded high-diversity code provides guarantees that at least part of the information is received reliably.We provide constructions of linear and nonlinear codes for a fixed transmit alphabet constraint. The nonlinear constructions are a natural generalization to wireless channels of multilevel codes developed for the additive white Gaussian noise (AWGN) channel that are matched to binary partitions of quadrature amplitude modulation (QAM) and phase-shift keying (PSK) constellations. The importance of set-partitioning to code design for the wireless channel is that it provides a mechanism for translating constraints in the binary domain into lower bounds on diversity protection in the complex domain. We investigate the systems implications of embedded diversity codes by examining value to unequal error protection, rate opportunism, and packet delay optimization. These applications demonstrate that diversity-embedded codes have the potential to outperform traditional single-layer codes in moderate signal-to-noise (SNR) regimes. © 2008 IEEE.

Duke Scholars

Published In

IEEE Transactions on Information Theory

DOI

ISSN

0018-9448

Publication Date

January 1, 2008

Volume

54

Issue

1

Start / End Page

33 / 50

Related Subject Headings

  • Networking & Telecommunications
  • 4613 Theory of computation
  • 4006 Communications engineering
  • 1005 Communications Technologies
  • 0906 Electrical and Electronic Engineering
  • 0801 Artificial Intelligence and Image Processing
 

Citation

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Diggavi, S. N., Calderbank, A. R., Dusad, S., & Al-Dhahir, N. (2008). Diversity embedded space-time codes. IEEE Transactions on Information Theory, 54(1), 33–50. https://doi.org/10.1109/TIT.2007.911280
Diggavi, S. N., A. R. Calderbank, S. Dusad, and N. Al-Dhahir. “Diversity embedded space-time codes.” IEEE Transactions on Information Theory 54, no. 1 (January 1, 2008): 33–50. https://doi.org/10.1109/TIT.2007.911280.
Diggavi SN, Calderbank AR, Dusad S, Al-Dhahir N. Diversity embedded space-time codes. IEEE Transactions on Information Theory. 2008 Jan 1;54(1):33–50.
Diggavi, S. N., et al. “Diversity embedded space-time codes.” IEEE Transactions on Information Theory, vol. 54, no. 1, Jan. 2008, pp. 33–50. Scopus, doi:10.1109/TIT.2007.911280.
Diggavi SN, Calderbank AR, Dusad S, Al-Dhahir N. Diversity embedded space-time codes. IEEE Transactions on Information Theory. 2008 Jan 1;54(1):33–50.

Published In

IEEE Transactions on Information Theory

DOI

ISSN

0018-9448

Publication Date

January 1, 2008

Volume

54

Issue

1

Start / End Page

33 / 50

Related Subject Headings

  • Networking & Telecommunications
  • 4613 Theory of computation
  • 4006 Communications engineering
  • 1005 Communications Technologies
  • 0906 Electrical and Electronic Engineering
  • 0801 Artificial Intelligence and Image Processing