access icon free Full-duplex MIMO system based on antenna cancellation technique

© The Institution of Engineering and Technology
Received 30/05/2014, Published 22/07/2014

The performance of an antenna cancellation technique for a multiple-input–multiple-output (MIMO) full-duplex system that is based on null-steering beamforming and antenna polarisation diversity is investigated. A practical implementation of a symmetric antenna topology comprising three dual-polarised patch antennas operating at 2.4 GHz is described. The measurement results show an average of 60 dB self-interference cancellation over 200 MHz bandwidth. Moreover, a decoupling level of up to 22 dB is achieved for MIMO multiplexing using antenna polarisation diversity. The performance evaluation of the proposed technique was performed by simulation and measurement and the results have good agreement.

Inspec keywords: UHF antennas; electromagnetic wave polarisation; radiotelemetry; microstrip antenna arrays; interference suppression; array signal processing; radiofrequency interference; MIMO communication

Other keywords: null-steering beamforming; gain 60 dB; self-interference cancellation; dual-polarised patch antenna; antenna polarisation diversity; antenna cancellation technique; frequency 2.4 GHz; performance evaluation; symmetric antenna topology; multiplexing; MIMO full-duplex system; multiple-input-multiple-output full-duplex system

Subjects: Signal processing and detection; Antenna arrays; Electromagnetic compatibility and interference; Telemetry; Radio links and equipment

References

    1. 1)
      • 1. Jain, M., Choi, J.I., Kim, T., et al: ‘Practical, real-time, full duplex wireless’. Proc. 17th Annual Int. Conf. Mobile Computing Networking (Mobicom), Las Vegas, NV, USA, September 2011, pp. 301–312.
    2. 2)
      • 6. Tsakalaki, E., Foroozanfard, E., de Carvalho, E., Pedersen, G.F.: ‘A 2-order MIMO full-duplex antenna system’. Proc. 8th European Conf. Antennas Propagation (EuCAP), The Hague, The Netherlands, April 2014, accepted.
    3. 3)
      • 7. Available at http://www.satimo.com/content/products/starlab.
    4. 4)
      • 3. Bharadia, D., McMilin, E., Katti, S.: ‘Full duplex radios’. Proc. ACM Sigcomm, Hong Kong, China, August 2013, pp. 375–386.
    5. 5)
    6. 6)
      • 2. Duarte, M., Sabharwal, A.: ‘Full-duplex wireless communications using off-the-shelf radios: feasibility and first results’. Proc. 44th Asilomar Conf. Signals, Systems and Computers, Pacific Grove, CA, USA, November 2011, pp. 1558–1562.
    7. 7)
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