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Securing Communication via Transmission of Artificial Noise by Both Sides: Bipolar-Beamforming Optimization

Author

Listed:
  • Yongkai Zhou
  • Yan Zhu
  • Fangbiao Li
  • Zachary Imm
  • Xinxing Yin
  • Zhi Xue

Abstract

The paper considers the secure transmission in a wireless environment in which both the transmitter (Alice) and the legitimate receiver (Bob) send artificial noise (AN) to interfere with the eavesdropper (Eve). Optimal design is analyzed in detail for this AN-by-both-side model to deal with Eve’s stochastic channel condition and random spatial distribution. Bipolar-beamforming is first proposed to jointly design Alice and Bob’s transmitting signals. By optimally assigning the transmitting antenna for Bob and allocating the power ratio between Alice’s information and the AN signal, maximum secrecy capacity can be achieved. Simulation is done to illustrate the process of bipolar-beamforming optimization. Results show that the AN-by-both-side model has good secrecy performance on both average and extreme conditions as Eve approaches Alice or Bob.

Suggested Citation

  • Yongkai Zhou & Yan Zhu & Fangbiao Li & Zachary Imm & Xinxing Yin & Zhi Xue, 2013. "Securing Communication via Transmission of Artificial Noise by Both Sides: Bipolar-Beamforming Optimization," Mathematical Problems in Engineering, Hindawi, vol. 2013, pages 1-7, December.
    • Handle: RePEc:hin:jnlmpe:686403
    DOI: 10.1155/2013/686403
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