Skip to main content
  • Research Article
  • Published:

Joint Power Control and Blind Beamforming over Wireless Networks: A Cross Layer Approach

Abstract

Traditional joint power control and beamforming achieve the targeted signal-to-interference-noise ratio (SINR) at the receivers by assuming the knowledge of the measurements of channel parameters and SINR. Blind beamforming is an effective technique for beamforming and channel estimation without the need of training sequences, thus not consuming extra bandwidth. In this paper, we propose a novel joint power control and blind beamforming algorithm that reformulates the power control problem in such a way that it does not need any prior knowledge and additional measurements in the physical layer. In contrast to the traditional schemes that optimize SINR and, as a result, minimize bit error rate (BER), our proposed algorithm achieves the desired BER by adjusting a quantity available from blind beamforming. By sending this quantity to the transmitter through a feedback channel, the transmit power is iteratively updated in a distributed manner in the wireless networks with cochannel interferences (CCIS). Our proposed algorithm is more robust to estimation errors. We have shown in both analysis and simulation that our algorithm converges to the desired solution. In addition, a Cramer-Rao lower bound (CRB) is derived to compare with the performance of our proposed joint power control and blind beamforming system.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Zhu Han.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Han, Z., Farrokhi, F.R. & Liu, K.J.R. Joint Power Control and Blind Beamforming over Wireless Networks: A Cross Layer Approach. EURASIP J. Adv. Signal Process. 2004, 329696 (2004). https://doi.org/10.1155/S1110865704311030

Download citation

  • Received:

  • Revised:

  • Published:

  • DOI: https://doi.org/10.1155/S1110865704311030

Keywords