access icon free Impact of cooperative space–time/frequency diversity in OFDM-based wireless sensor systems over mobile multipath channels

Cooperative linear dispersion coding (LDC) can support arbitrary configurations of source nodes and destination nodes in virtual multi-input–multi-output systems. In this study, the authors investigate two spatial diversity applications of cooperative LDC for orthogonal frequency division multiplexing (OFDM)-based wireless sensor systems in order to achieve space–time/frequency (ST/SF) diversity gains when transmitting over time-/frequency-selective fading channels. Cooperative LDC-aided ST-/SF-OFDM is flexible in configuring various numbers of cooperative source nodes and time-slots or frequency-tones. Their results show that the ST-OFDM scheme is sensitive to exploiting diversity gains, subject to the impact of varying channel Doppler spreads; while the performance of SF-OFDM is mainly subject to delay spread. Specifically, when the system involves more than two cooperative nodes, the cooperative LDC-aided ST-/SF-OFDM outperforms the cooperative orthogonal block codes (e.g. Tarokh's codes) aided ST-/SF-OFDM, when communicating over a higher Doppler/delay spread.

Inspec keywords: cooperative communication; linear codes; fading channels; wireless sensor networks; OFDM modulation; MIMO communication; multipath channels; diversity reception; channel coding

Other keywords: cooperative LDC-aided ST-SF-OFDM; spatial diversity; cooperative space-time-frequency diversity; mobile multipath channels; frequency-tones; ST-SF diversity gains; cooperative source nodes; virtual multiinput-multioutput systems; destination nodes; time-frequency-selective fading channels; delay spread; cooperative linear dispersion coding; time-slots; orthogonal frequency division multiplexing; channel Doppler spreads; OFDM-based wireless sensor systems

Subjects: Wireless sensor networks; Codes

References

    1. 1)
    2. 2)
      • 6. Hanzo, L., Alamri, O., El-Hajjar, M., et al: ‘Near-capacity multi-functional MIMO systems: sphere-packing, iterative detection and cooperation’ (Wiley-IEEE Press, Chichester, UK, 2009).
    3. 3)
    4. 4)
      • 10. Paulraj, A., Nabar, R., Gore, D.: ‘Introduction to space–time wireless communications’ (Cambridge University Press, Cambridge, UK, 2003).
    5. 5)
    6. 6)
    7. 7)
    8. 8)
      • 30. Rangaraj, G.V., Jalihal, D., Giridhar, K.: ‘Exploiting multipath diversity using space–frequency linear dispersion codes in MIMO-OFDM systems’. Proc. ICC 2005, May 2005, vol. 4, pp. 26502654.
    9. 9)
    10. 10)
    11. 11)
    12. 12)
      • 29. Wu, J., Blostein, S.: ‘High-rate codes over space, time, and frequency’. Proc. IEEE GLOBECOM 2005, December 2005, vol. 6, p. 6.
    13. 13)
      • 45. Ouyang, Y.: ‘Peak-to-average power ratio reduction by cross-antenna translation for SFBC MIMO-OFDM systems’. Proc. IEEE VTC Spring 2009, April 2009, pp. 14.
    14. 14)
      • 47. Deng, X., Jiang, T., Zhou, Y., et al: ‘Peak-to-average power ratio reduction in space frequency block coding multi-input multi-output orthogonal frequency division multiplexing systems by tone reservation’, Int. J. Commun. Syst., 2014, 27, (12), pp. 38743883. Available at http://www.dx.doi.org/10.1002/dac.2582.
    15. 15)
    16. 16)
    17. 17)
    18. 18)
      • 37. Yang, L.-L.: ‘Multicarrier communications’ (John Wiley & Sons Ltd, Chichester, UK, 2009).
    19. 19)
    20. 20)
    21. 21)
    22. 22)
    23. 23)
      • 20. Hanzo, L., Akhtman, Y., Wang, L., et al: ‘MIMO-OFDM for LTE, WIFI and WIMAX: coherent versus non-coherent and cooperative turbo-transceivers’ (Wiley-IEEE Press, Chichester, UK, 2010).
    24. 24)
    25. 25)
    26. 26)
    27. 27)
      • 35. Gunduz, D., Yener, A., Goldsmith, A.J., et al: ‘The multi-way relay channel’. Proc. IEEE ISIT 2009, July 2009, pp. 339343.
    28. 28)
    29. 29)
    30. 30)
      • 17. Stoica, P., Lindskog, E.: ‘Space–time block coding for channels with intersymbol interference’. Proc. ACSSC 2001, November 2001, vol. 1, pp. 252256.
    31. 31)
    32. 32)
      • 15. Hanzo, L., Münster, M., Choi, B.-J., et al: ‘OFDM and MC-CDMA for broadband multi-user communications, WLANs and broadcasting’ (Wiley-IEEE Press, Chichester, UK, 2003).
    33. 33)
    34. 34)
      • 18. Bauch, G.: ‘Space–time block codes versus space–frequency block codes’. IEEE VTC2003-Spring, April 2003, vol. 1, pp. 567571.
    35. 35)
    36. 36)
    37. 37)
    38. 38)
    39. 39)
    40. 40)
    41. 41)
    42. 42)
    43. 43)
    44. 44)
    45. 45)
    46. 46)
    47. 47)
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-wss.2015.0033
Loading

Related content

content/journals/10.1049/iet-wss.2015.0033
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading