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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Precoder Distribution and Adaptive Codebook in Wideband Precoding

  • Long, Hang (School of Electronics Engineering, Beijing University of Posts & Telecommunications, Wireless Signal Processing and Network Lab., Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts & Telecommunications) ;
  • Kim, Kyeong Jin (UWB Wireless Communications Research Center, Inha University, Mitsubishi Electric Research Laboratories) ;
  • Xiang, Wei (Faculty of Engineering and Surveying, University of Southern Queensland) ;
  • Wang, Jing (Wireless Signal Processing and Network Lab., Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts & Telecommunications) ;
  • Liu, Yuanan (School of Electronics Engineering, Beijing University of Posts & Telecommunications) ;
  • Wang, Wenbo (Wireless Signal Processing and Network Lab., Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts & Telecommunications)
  • Received : 2012.01.28
  • Accepted : 2012.06.01
  • Published : 2012.10.31
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Abstract

Based on wideband precoding (WBP) in the multiple-input multiple-output orthogonal frequency division multiplexing system, an adaptive nonuniform codebook is presented in this paper. The relationship between the precoder distribution and spatial correlation is analyzed at first. A closed-form expression based on overlapped isosceles triangles is proposed as an approximation of the precoder distribution. Then, the adaptive codebook design is derived with the approximate distribution to minimize quantization errors. The capacity and bit error rate performance demonstrate that the adaptive codebook with WBP outperforms the conventional fixed uniform codebook.

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References

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