Your browser does not support JavaScript!
http://iet.metastore.ingenta.com
1887

Equalisation of SIMO-OFDM systems with insufficient cyclic prefix in doubly selective channels

Equalisation of SIMO-OFDM systems with insufficient cyclic prefix in doubly selective channels

For access to this article, please select a purchase option:

Buy article PDF
$19.95
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Name:*
Email:*
Your details
Name:*
Email:*
Department:*
Why are you recommending this title?
Select reason:
 
 
 
 
 
IET Communications — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

Time variations of a doubly selective wireless channel and insufficient cyclic prefix (CP) length of an orthogonal frequency division multiplexing (OFDM) transmission system cause intercarrier interference (ICI) and interblock interference (IBI) as significant limitations. This paper investigates the problem of joint ICI and IBI mitigation in single-input multiple-output OFDM (SIMO-OFDM) systems. It is assumed, unlike most existing literature, that the channel delay spread is larger than the CP, and also the channel varies on each OFDM block. First, doubly selective channel is modelled using basis expansion model (BEM) and a closed-form expression for signal-to-interference-plus-noise ratio (SINR) is derived. Then, a time-domain equaliser is developed, which maximises the SINR for all subcarriers. Moreover, a frequency-domain equalisation approach is proposed which is based on the MSE minimisation per tone. A low-complexity implementation of the per-tone equaliser is also derived. An important feature of the proposed equalisers is that no bandwidth expansion or redundancy insertion is required except for the CP. Finally, complexity comparison and simulation results over Rayleigh fading channel are provided to illustrate the effectiveness of the proposed approaches. Since both equalisers are designed in the frequency domain, they provide significant interference cancellation.

References

    1. 1)
    2. 2)
      • Li, G., Yang, H., Cai, L., Gui, L.: `A low-complexity equalization technique for OFDM system in time-variant multipath channels', Proc. IEEE Veh. Technol. Conf., October 2003, Orlando Florida, USA, p. 2466–2470.
    3. 3)
      • M.-X. Chang . A novel algorithm of inter-subchannel interference self-cancellation for OFDM systems. IEEE Trans. Wirel. commun. , 8 , 2881 - 2893
    4. 4)
    5. 5)
      • Trautmann, S., Karp, T., Fliege, N.J.: `Frequency-domain equalization of DMT/OFDM systems with insufficient guard interval', Proc. IEEE Int. Conf. Communication, April 2002, New York, USA, p. 1646–1650.
    6. 6)
    7. 7)
      • B. Farhang-Boroujeny , S. Gazor . Generalized sliding FFT and its application to implementation of block LMS adaptive filters. IEEE Trans. Signal Process. , 3 , 532 - 538
    8. 8)
      • M.K. Tsatsanis , G.B. Giannakis . Modeling and equalization of rapidly fading channels. Int. J. Adaptive Control. Signal Process. , 159 - 176
    9. 9)
      • Kim, J., Kang, J., Powers, E.J.: `A bandwidth efficient OFDM transmission scheme', Proc. IEEE Int. Conf. Acoustics, Speech, Signal Processing, May 2002, Washington, USA, p. 2329–2332.
    10. 10)
    11. 11)
      • J. Armstrong . Analysis of new and existing methods of reducing intercarrier interference due to carrier frequency offset in OFDM. IEEE Trans. Commun. , 3 , 365 - 369
    12. 12)
    13. 13)
      • J. Zhang , W. Ser , J. Zhu . Effective optimisation method for channel shortening in OFDM systems. Proc. IEE Inst. Electr. Eng.-Commun. , 2 , 85 - 90
    14. 14)
    15. 15)
      • M. Martone . Wavelet-based separating kernels for array processing of cellular DS/CDMA signal in fast fading. IEEE Trans. Commun. , 1 , 979 - 995
    16. 16)
    17. 17)
      • Barhumi, I., Leus, G., Moonen, M.: `Frequency-domain equalization for OFDM over doubly selective channels', Proc. sixth Baiona Workshop Signal Processing and Communication, 2003, Baiona, Spain, p. 103–107.
    18. 18)
      • L.J. Cimini . Analysis and simulation of a digital mobile radio channel using orthogonal frequency division multiplexing. IEEE Trans. Commun. , 7 , 665 - 765
    19. 19)
      • H. Lee , J. Kang , E.J. Powers . Adaptive linear symbol detection for OFDM systems in time-frequency-selective fading channels. IEICE Trans. Commun. , 3 , 685 - 688
    20. 20)
      • H. Wang , X. Chen , S. Zhou , M. Zhao , Y. Yao . Low-complexity ICI cancellation in frequency domain for OFDM systems in time-varying multipath channels. IEICE Trans. Commun. , 3 , 1020 - 1023
    21. 21)
      • Huang, X., Wu, H.-C.: `Intercarrier interference analysis for wireless OFDM in mobile channels', Proc. IEEE Wireless Commun. Netw. Conf., April 2006, Las Vegas, NV, USA, p. 1848–1853.
    22. 22)
      • R.K. Martin , G. Ysebaert , K. Vanbleu . Bit error rate minimizing channel shortening equalizers for cyclic prefixed systems. IEEE Trans. Commun. , 6 , 2605 - 2616
    23. 23)
    24. 24)
      • X. Huang , H.-C. Wu . Robust and efficient intercarrier interference mitigation for OFDM systems in time-varying fading channels. IEEE Trans. Veh. Technol. , 5 , 2517 - 1528
    25. 25)
      • Cui, T., Tellambura, C., Wu, Y.: `Low-complexity pilot-aided channel estimation for OFDM systems over doubly selective channels', Proc. IEEE Int. Conf. Communications, May 2005, Seoul, Korea, p. 1980–1984.
    26. 26)
      • Cai, X., Giannakis, G.B.: `Low-complexity ICI suppression for OFDM over time- and frequency-selective Rayleigh fading channels', Proc. 36th Asilomar Conf. Signals, Systems, Computers, November 2002, Pacific Grove, CA, p. 1822–1826.
    27. 27)
      • A.F. Molisch , M. Toeltsch , S. Vermani . Iterative methods for cancellation of intercarrier interference in OFDM systems. IEEE Trans. Veh. Technol. , 4 , 2158 - 2167
    28. 28)
      • X.D. Cai , G.B. Giannakis . Bounding performance and suppressing intercarrier interfenence in wireless mobile OFDM. IEEE Trans. Commun. , 12 , 2047 - 2056
    29. 29)
      • K.V. Acker , G. Leus , M. Moonen , T. Pollet . Per-tone equalization for DMT-based systems. IEEE Trans. Commun. , 1 , 109 - 119
    30. 30)
    31. 31)
      • S. Ahson , M. Ilyas . (2007) WiMAX: technologies, performance analysis, and QoS.
    32. 32)
    33. 33)
    34. 34)
      • A. Sayeed , B. Aazhang . Joint multipath-Doppler diversity in mobile wireless communications. IEEE Trans. Commun. , 1 , 123 - 132
    35. 35)
      • Yeh, Y.-H., Chen, S.-G.: `Reduction of Doppler-induced ICI by interference prediction', Proc. IEEE Int. Symp. Pers., Indoor Mobile Radio Communication, September 2004, Barcelona, Spain, p. 653–657.
    36. 36)
      • C.J. Park , G.H. Im . Efficient DMT/OFDM transmission with insufficient cyclic prefix. IEEE Commun. Lett. , 9 , 576 - 578
    37. 37)
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-com.2008.0659
Loading

Related content

content/journals/10.1049/iet-com.2008.0659
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
This is a required field
Please enter a valid email address