Skip to main content

A Simple Differential Modulation Scheme for Quasi-Orthogonal Space-Time Block Codes with Partial Transmit Diversity

Abstract

We report a simple differential modulation scheme for quasi-orthogonal space-time block codes. A new class of quasi-orthogonal coding structures that can provide partial transmit diversity is presented for various numbers of transmit antennas. Differential encoding and decoding can be simplified for differential Alamouti-like codes by grouping the signals in the transmitted matrix and decoupling the detection of data symbols, respectively. The new scheme can achieve constant amplitude of transmitted signals, and avoid signal constellation expansion; in addition it has a linear signal detector with very low complexity. Simulation results show that these partial-diversity codes can provide very useful results at low SNR for current communication systems. Extension to more than four transmit antennas is also considered.

[123456789101112131415]

References

  1. Alamouti SM: A simple transmit diversity technique for wireless communications. IEEE Journal on Selected Areas in Communications 1998,16(8):1451-1458. 10.1109/49.730453

    Article  Google Scholar 

  2. Tarokh V, Jafarkhani H, Calderbank AR: Space-time block coding for wireless communications: performance results. IEEE Journal on Selected Areas in Communications 1999,17(3):451-460. 10.1109/49.753730

    Article  MATH  Google Scholar 

  3. Jafarkhani H: A quasi-orthogonal space-time block code. IEEE Transactions on Communications 2001,49(1):1-4. 10.1109/26.898239

    MATH  Article  Google Scholar 

  4. Sharma N, Papadias CB: Improved quasi-orthogonal codes through constellation rotation. IEEE Transactions on Communications 2003,51(3):332-335. 10.1109/TCOMM.2003.809753

    Article  Google Scholar 

  5. Su W, Xia X-G: Signal constellations for quasi-orthogonal space-time block codes with full diversity. IEEE Transactions on Information Theory 2004,50(10):2331-2347. 10.1109/TIT.2004.834740

    MATH  MathSciNet  Article  Google Scholar 

  6. Tarokh V, Jafarkhani H: Differential detection scheme for transmit diversity. IEEE Journal on Selected Areas in Communications 2000,18(7):1169-1174. 10.1109/49.857917

    Article  Google Scholar 

  7. Jafarkhani H, Tarokh V: Multiple transmit antenna differential detection from generalized orthogonal designs. IEEE Transactions on Information Theory 2001,47(6):2626-2631. 10.1109/18.945280

    MATH  MathSciNet  Article  Google Scholar 

  8. Hochwald BM, Sweldens W: Differential unitary space-time modulation. IEEE Transactions on Communications 2000,48(12):2041-2052. 10.1109/26.891215

    Article  Google Scholar 

  9. Hughes BL: Differential space-time modulation. IEEE Transactions on Information Theory 2000,46(7):2567-2578. 10.1109/18.887864

    MATH  Article  Google Scholar 

  10. Clarkson KL, Sweldens W, Zheng A: Fast multiple-antenna differential decoding. IEEE Transactions on Communications 2001,49(2):253-261. 10.1109/26.905879

    MATH  Article  Google Scholar 

  11. Yuen C, Guan YL, Tjhung TT: Differential transmit diversity based on quasi-orthogonal space-time block code. Proceedings of IEEE Global Telecommunications Conference (GLOBECOM '04), November-December 2004, Dallas, Tex, USA 1: 545-549.

    Article  Google Scholar 

  12. Zhu Y, Jafarkhani H: Differential modulation based on quasi-orthogonal codes. IEEE Transactions on Wireless Communications 2005,4(6):3018-3030.

    Article  Google Scholar 

  13. Song L-Y, Burr AG: Differential quasi-orthogonal space-time block codes. IEEE Transactions on Wireless Communications 2007,6(1):64-68.

    Article  MATH  Google Scholar 

  14. He L, Ge H: A new full-rate full diversity orthogonal space-time block coding scheme. IEEE Communications Letters 2003,7(12):590-592.

    Article  Google Scholar 

  15. Calderbank AR, Das S, Al-Dhahir N, Diggavi S: Construction and analysis of a new quaternionic space-time code for 4 transmit antennas. Journal of Communications in Information and Systems 2005,5(1):97-122. special issue on 70th Birthday of Thomas Kailat

    MATH  MathSciNet  Article  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Lingyang Song.

Rights and permissions

Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Reprints and Permissions

About this article

Cite this article

Song, L., Burr, A.G. A Simple Differential Modulation Scheme for Quasi-Orthogonal Space-Time Block Codes with Partial Transmit Diversity. J Wireless Com Network 2007, 097475 (2007). https://doi.org/10.1155/2007/97475

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1155/2007/97475

Keywords

  • Information System
  • Communication System
  • System Application
  • Transmitted Signal
  • Signal Detector