A simplified bit metric calculation method for high-order PSK

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• 作者：Lei Wang (14469)
  DaZhuan Xu (14469)
  XiaoFei Zhang (14469)
  
• 关键词：phase shift keying ; high order modulation ; bit metric ; soft demodulation
• 刊名：SCIENCE CHINA Information Sciences
• 出版年：2013
• 出版时间：July 2013
• 年：2013
• 卷：56
• 期：7
• 页码：1-9
• 全文大小：728KB
• 参考文献：1. Zehavi E. 8-PSK trellis codes for a Rayleigh channel. IEEE Trans Commun, 1992, 40: 873鈥?84 CrossRef
  2. Caire G, Taricco G, Biglieri E. Bit-interleaved coded modulation. IEEE Trans Inform Theory, 1998, 44: 927鈥?46 CrossRef
  3. 802.11n. Enhancements for Higher Throughput. IEEE 802.11 WG.IEEE 802.11n/D1.0 Draft Amendment. 2006
  4. 802.16m. Draft IEEE 802.16m Evaluation Methodology. IEEE802.16m-07/037r1. 2007
  5. LTE. Requirements for Evolved UTRA (E-UTRA) and Evolved UTRAN(E-UTRAN). 3GPP TR 25.913 v.7.3.0. 2006
  6. Viterbi A J. An intuitive justification and a simplified implementation of the map decoder for convolutional codes. IEEE J Sel Area Comm, 1998, 16: 260鈥?64 CrossRef
  7. Tosato F, Bisaglia P. Simplified soft-output demapper for binary interleaved COFDM with application to HIPERLAN/2. In: Proceedings of IEEE International Conference on Communication. New York: IEEE, 2002. 664鈥?68
  8. Ghaffar R, Knopp R. Low complexity metrics for BICM SISO and MIMO systems. In: Proceedings of IEEE 71st Vehicular Technology Conference. Taipei: IEEE, 2010. 1鈥?
  9. Hyun K, Yoon D. Bit metric generation for Gray coded QAM signals. IEE P-Commun, 2005, 152: 1134鈥?138 CrossRef
  10. Yazdani R, Ardakani M. Efficient LLR calculation for non-binary modulations over fading channels. IEEE Trans Commun, 2011, 59: 1236鈥?241 CrossRef
  11. Pan W, You X H. The recursive calculation method of bit soft output. J Electron Inf Technol, 2006, 28: 1111鈥?114
  12. Xie Q L, Peng K W, Pan C Y, et al. Bit-interleaved LDPC coded modulation with iterative demapping and decoding. J Tsinghua Univ(Sci Tech), 2009, 49: 1201鈥?204
  13. Zhao J, Zhang J Q. It confidence-based soft decision metric generation for QAM. J Electron Inf Technol, 2009, 31: 985鈥?88
  14. Nagaraj S. Symbol-level adaptive modulation for coded OFDM on block fading channels. IEEE Trans Commun, 2009, 57: 2872鈥?875 CrossRef
  15. ETSI DVB-S2. Digital video broadcasting. ETSI EN 302 307. 2006
  
• 作者单位：Lei Wang (14469)
  DaZhuan Xu (14469)
  XiaoFei Zhang (14469)
  
  14469. College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China
  

文摘

This paper proposes a simplified bit metric calculation method for high-order PSK signal with Gray-mapping. This method calculates the bit metric recursively by the symmetry of Gray code. Analysis and simulation results show that the proposed method can significantly reduce the computational complexity and maintain similar performance compared to ML and Max-Log bit metric. Additionally, this method generates bit metrics of PSK signals with different modulation order in the same way, so it can be applied to adaptive modulation system.