Earticle

초록

영어

To implement transmit beamforming, which is an effective way of leveraging the diversity
gains, for multiple-input single-output orthogonal frequency division multiplexing (MISOOFDM)
systems, (partial) channel state information is required at the transmitter. In this paper, we present a new limited feedback scheme in MISO-OFDM systems with transmit beamforming. By dividing the total subcarriers of an OFDM symbol into a series of clusters, from the codebook we choose the “proper” one, which minimizes the average bit error rate (BER) per subcarrier of the considered cluster, as the beamforming vector for this cluster. The scheme can reduce the feedback overhead remarkably while obtain good BER performance. Further, a simple sub-optimal algorithm exploiting the correlation of channel frequency responses at different ubcarriers is proposed to avoid exhaustive search in the optimal solution. The complexity analysis and simulations show that the proposed method has low computational complexity and provides improvement over the existing schemes.

목차

Abstract
 1. Introduction
 2. System model
 3. BER-minimizing limited feedback
  3.1. BER-minimizing BFV selection
  3.2. Suboptimal algorithm
 4. Complexity analysis
 5. Simulation results
 6. Conclusions
 References

저자

• Lei Zhang [ National Key Lab of Communication, University of Electronic Science and Technology of China ]
• Gang Wu [ National Key Lab of Communication, University of Electronic Science and Technology of China ]
• Shaoqian Li [ National Key Lab of Communication, University of Electronic Science and Technology of China ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Multimedia and Ubiquitous Engineering

• 간기

  월간

• pISSN

  1975-0080

• 수록기간

  2008~2016

• 등재여부

  SCOPUS

• 십진분류

  KDC 505 DDC 605