• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Optical fiber technology >Bit-interleaved polar coded modulation scheme for high-order QAM encoded DDO-OFDM systems
【24h】

Bit-interleaved polar coded modulation scheme for high-order QAM encoded DDO-OFDM systems

机译：高阶QAM编码DDO-OFDM系统的比特交织极性编码调制方案

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the paper, a simple generation scheme of the twin-SSB-OFDM signal based on one OFDM transmitter is proposed in the direct-detection optical orthogonal frequency-division multiplexing (DDO-OFDM) system. Compared with traditional generation scheme that requires two OFDM transmitters, it has lower implementation complexity and lower cost. In addition, to enhance the spectral efficiency (SE) for DDO-OFDM system, an efficient bit-interleaved polar coded modulation (BIPCM) scheme adopting 256 quadrature-amplitude modulation (256-QAM) is proposed. Moreover, a quadratic polynomial permutation (QPP) interleaver is adopted for polar coded modulation (PCM) to further improve the overall system performance. The simulation results exhibit that the proposed scheme can achieve more than 4 dB and 5 dB Q-factor improvement compared to the conventional schemes with PCM and without BIPCM, respectively. At the same time, aided by the efficient 256-QAM BIPCM scheme, the receiver sensitivity is improved and the laser linewidth requirement is less strict compared to the conventional schemes.
机译：在直接检测光正交频分复用（DDO-OFDM）系统中，提出了一种基于一个OFDM发射机的双SSB-OFDM信号的简单生成方案。与需要两个OFDM发射机的传统生成方案相比，它具有较低的实现复杂度和较低的成本。此外，为了提高DDO-OFDM系统的频谱效率（SE），提出了一种采用256正交幅度调制（256-QAM）的高效比特交织极性编码调制（BIPCM）方案。此外，二次多项式置换（QPP）交织器用于极性编码调制（PCM），以进一步提高整体系统性能。仿真结果表明，与采用PCM和不使用BIPCM的常规方案相比，该方案可以分别提高4 dB和5 dB的Q因子。同时，借助有效的256-QAM BIPCM方案，与传统方案相比，接收机灵敏度得到了提高，对激光线宽的要求也不再那么严格。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号