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Pseudo pilot-aided OFDM system with high spectral efficiency for high performance coaxial transmission

伪导频辅助的高频谱效率同轴传输OFDM系统

Abstract

High performance network over coax (HINOC) has become next-generation broadcasting network (NGB) industry standard of China, as well as International Telecommunication Union (ITU) telecommunication standard, which adopts orthogonal frequency division multiplexing (OFDM) technique and high order modu- lation formats. As is known, in OFDM system, phase noise destroys the orthogonality of the subcarriers and degrades the performance of the system especially when the data are transmitted in high order modulation formats. In this paper, we propose a high spectral efficiency OFDM system utilizing a novel and almost blind phase noise compensation method mainly used for high performance coaxial transmission. In our system, some subcarriers, which remain to transmit unknown useful data in lower order modulation formats, are selected as pseudo pilots instead of pilots to suppress phase noise effectively and high spectral efficiency can be achieved with the aid of puncturing mechanisms. Simulation results show that the proposed pseudo pilot-aided OFDM system can achieve the performance of the pilot-aided counterpart yet acquiring higher spectral efficiency.

创新点

高性能同轴电缆接入(HINOC)技术已经成为下一代广播电视网络接入技术的行业标准以及ITU国际电信标准。HINOC技术采用正交频分复用(OFDM)技术, 特点是传输距离近, 信道质量好, 调制格式最高可以达到4096QAM, 从而实现吉比特的数据传输。但是从晶体或者晶振引入的相位噪声会对OFDM系统的性能造成很大的影响, 必须利用抑制算法予以解决。这篇文章中, 我们提出了一种伪导频辅助的高频谱效率同轴传输OFDM系统。在该系统中, 我们提出了一种新颖的盲相位噪声抑制算法和凿空策略来保证同轴系统的高频谱效率。该系统不只可以应用在广播技术领域, 还可以应用在所有的其他致力于高传输速率的同轴接入系统中。

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Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant No. 61275005) and State Key Laboratory of Advanced Optical Communication Systems and Networks, China.

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Correspondence to Chuanchuan Yang.

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Cite this article

Liu, Y., Yang, C. & Li, H. Pseudo pilot-aided OFDM system with high spectral efficiency for high performance coaxial transmission. Sci. China Inf. Sci. 60, 062303 (2017). https://doi.org/10.1007/s11432-016-0036-8

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Keywords

  • orthogonal frequency division multiplexing (OFDM)
  • high performance network over coax (HINOC)
  • phase noise
  • pseudo pilots
  • broadcasting

关键词

  • 正交频分复用
  • 高性能同轴电缆接入
  • 相位噪声
  • 伪导频
  • 广播技术