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Multiple-Antenna Interference Cancellation for WLAN with MAC Interference Avoidance in Open Access Networks


The potential of multiantenna interference cancellation receiver algorithms for increasing the uplink throughput in WLAN systems such as 802.11 is investigated. The medium access control (MAC) in such systems is based on carrier sensing multiple-access with collision avoidance (CSMA/CA), which itself is a powerful tool for the mitigation of intrasystem interference. However, due to the spatial dependence of received signal strengths, it is possible for the collision avoidance mechanism to fail, resulting in packet collisions at the receiver and a reduction in system throughput. The CSMA/CA MAC protocol can be complemented in such scenarios by interference cancellation (IC) algorithms at the physical (PHY) layer. The corresponding gains in throughput are a result of the complex interplay between the PHY and MAC layers. It is shown that semiblind interference cancellation techniques are essential for mitigating the impact of interference bursts, in particular since these are typically asynchronous with respect to the desired signal burst. Semiblind IC algorithms based on second- and higher-order statistics are compared to the conventional no-IC and training-based IC techniques in an open access network (OAN) scenario involving home and visiting users. It is found that the semiblind IC algorithms significantly outperform the other techniques due to the bursty and asynchronous nature of the interference caused by the MAC interference avoidance scheme.



  1. Paulraj AJ, Papadias CB: Space-time processing for wireless communications. IEEE Signal Processing Magazine 1997,14(6):49-83. 10.1109/79.637317

    Article  Google Scholar 

  2. Andrews JG: Interference cancellation for cellular systems: a contemporary overview. IEEE Wireless Communications 2005,12(2):19-29. 10.1109/MWC.2005.1421925

    Article  Google Scholar 

  3. Kuzminskiy AM: Finite amount of data effects in spatio-temporal filtering for equalization and interference rejection in short burst wireless communications. Signal Processing 2000,80(10):1987-1997. 10.1016/S0165-1684(00)00065-7

    Article  MATH  Google Scholar 

  4. IEEE Std 802.11a : Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. 1999.

  5. Open Broadband Access Network (OBAN) IST 6FP Contract no. 001889,

  6. Kuzminskiy AM, Abramovich YI: Second-order asynchronous interference cancellation: regularized semi-blind technique and non-asymptotic maximum likelihood benchmark. Signal Processing 2006,86(12):3849-3863. 10.1016/j.sigpro.2006.03.026

    Article  MATH  Google Scholar 

  7. Kuzminskiy AM, Abramovich YI: Adaptive second-order asynchronous CCI cancellation: maximum likelihood benchmark for regularized semi-blind technique. Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP '04), May 2004, Montreal, Que, Canada 4: 453-456.

    Google Scholar 

  8. Kuzminskiy AM, Abramovich YI: Interval-based maximum likelihood benchmark for adaptive second-order asynchronous CCI cancellation. Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP '07), April 2007, Honolulu, Hawaii, USA 2: 865-868.

    Google Scholar 

  9. Kuzminskiy AM, Papadias CB: Asynchronous interference cancellation with an antenna array. Proceedings of the 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC '02), September 2002, Lisbon, Portugal 1: 260-264.

    Article  Google Scholar 

  10. Kuzminskiy AM, Papadias CB: Re-configurable semi-blind cancellation of asynchronous interference with an antenna array. Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP '03), April 2003, Hong Kong 4: 696-699.

    Google Scholar 

  11. Kuzminskiy AM, Abramovich YI: Adaptive asynchronous CCI cancellation: selection of the regularization parameter for regularized semi-blind technique. Proceedings of the 7th IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC '06), July 2006, Cannes, France 1-5.

    Google Scholar 

  12. Erceg V, Schumacher L, Kyritsi P, et al.: TGn Channel Models (IEEE 802.11-03/940r2). 2004. High Throughput Task Group, IEEE P802.1

    Google Scholar 

  13. Schumacher L: WLAN MIMO channel MATLAB program.

  14. Bartolome D, Mestre X, Perez-Neira AI: Single input multiple output techniques for Hiperlan/2. Proceedings of IST Mobile Communications Summit, September 2001, Barcelona, Spain

    Google Scholar 

  15. Kuzminskiy AM: Interference cancellation in OFDM with parametric modeling of the antenna array weights. Proceedings of the 35th Asilomar Conference on Signals, Systems and Computers, November 2001, Pacific Grove, Calif, USA 2: 1611-1615.

    Google Scholar 

  16. Abramovich YI, Kuzminskiy AM: On correspondence between training-based and semiblind second-order adaptive techniques for mitigation of synchronous CCI. IEEE Transactions on Signal Processing 2006,54(6):2347-2351.

    Article  Google Scholar 

  17. Kuzminskiy AM, Karimi HR: Cross-layer design of uplink multiple-antenna interference cancellation for WLAN with CSMA/CA in open access networks. Proceedings of IEEE International Conference on Communications (ICC '07), June 2007, Glasgow, Scotland, UK 2568-2573.

    Google Scholar 

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Correspondence to Alexandr M. Kuzminskiy.

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

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Kuzminskiy, A.M., Karimi, H. Multiple-Antenna Interference Cancellation for WLAN with MAC Interference Avoidance in Open Access Networks. J Wireless Com Network 2007, 051358 (2007).

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