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基于分层编码和OFDM的不等差错保护 被引量：5

Unequal Error Protection Based on Layered Coding and OFDM
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摘要 正交频分复用(OFDM)可通过子信道的不均匀功率分配提供不等差错保护(UEP)特性。分层编码的不同层及每层码字的不同比特在信号重建中的重要性均不相同,本文推导出不同层的权重因子,并给出功率分配算法,在功率总量不变的情况下,通过不均匀功率分配将信道失真降到最小。 Orthogonal frequency division multiplexing (OFDM) can be used to provide unequal error protection performance by unequally allocating power to sub-channels. In layered coding, different layers and different bits of the same layer抯 code-words have different importance in the reconstruction process. The weighting factors of layers are derived and the power allocation algorithm is presented. By allocating the power of subchannels carrying different information unequally, the channel-induced distortion can be minimized when the total power is given.
作者 郭东亮 吴乐南
机构地区 东南大学无线电工程系
出处 《电路与系统学报》 CSCD 2003年第2期18-21,共4页 Journal of Circuits and Systems
基金 国家自然科学基金资助项目(60072013)
关键词 正交频分复用 分层编码 不等差错保护 功率分配 orthogonal frequency division multiplexing layered coding unequal error protection power allocation
分类号 TN929.5 [电子电信—通信与信息系统]
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参考文献6

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同被引文献39

  • 1杨海明,赵明生.多媒体会议中图像通信的不等差错保护技术实现[J].电视技术,2004,28(6):80-82. 被引量：4
  • 2SHU L,COSTELLO D J.差错控制编码[M].晏坚,何元智,等译.北京:机械工业出版社.2007.
  • 3FANG T,CHAU L P.A novel unequal error protection approach for error resilient video transmission[J]. IEEE International Symposium on Circuits and Systems, 2005,4:4022-4025.
  • 4HUANG C, LIANG S.Unequal error protection for MPEG-2 video transmission over wireless channels [J].IEEE Trans. Signal Processing Image Communication, 2004,19 : 67-69.
  • 5F Yang, Q Zhang, W Zhu, YQ Zhang. An efficient transport scheme for multimedia transport over wireless Internet[N].IEEE International Conference on 3G wireless and Beyond (3Gwireless'01), June,2001, San Francisco, CA, USA.
  • 6R Puri, K Ramchandran. Multiple description coding using forward error correction codes[J]. Proc. of 33rd Asilomar Conference on Signals and Systems Pacific Grove, CA, 1999,(1):342-346.
  • 7V Chande, N Farvardin. A joint source-channel coding scheme for robust image transmission[J].Proc. Data Compression Conference, 1998:530.
  • 8Dapeng Wu, Hou, Y T Ya-Qin Zhang. Scalable video coding and transport over broadband wireless networks[J]. Proceedings of the IEEE,2001,8(9):6-20.
  • 9ITU Telecommunications Standardization Sector. ITU-T Recommendation H. 263. Video Coding for Low Bit Rate Communication[ S]. 1995.
  • 10ITU Telecommunications Standardization Sector. Video Coding for Low Bit Rate Communication, Draft ITU-T RecommendationH. 263 Version 2[ S]. 1997.

引证文献5

二级引证文献9

电路与系统学报
2003年 第2期

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