A constellation shaped 11-QAM signaling scheme based on geometric and probabilistic shaping
| Autor: | Wei Zhang, Rui Lv, Qinghua Tian, Ying Tao, Feng Tian, Xiangjun Xin, Yongjun Wang, Xishuo Wang, Jianxin Ren, Xia Sheng, Qi Zhang |
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| Rok vydání: | 2019 |
| Předmět: |
business.industry
Computer science Probabilistic logic Optical communication 02 engineering and technology 021001 nanoscience & nanotechnology Huffman coding 01 natural sciences Multiplexing Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics QAM symbols.namesake Noisy-channel coding theorem Optics 0103 physical sciences symbols Bit error rate Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology business Algorithm Constellation |
| Zdroj: | Optics Communications. 452:450-456 |
| ISSN: | 0030-4018 |
| Popis: | A novel constellation shaped 11-QAM signaling scheme based on geometric shaping (GS) and probabilistic shaping (PS) is proposed in this paper. The 11-QAM signals are obtained by Huffman coding with an optimized 11-QAM constellation structure. Then the non-uniform 11-QAM signals are generated by bit-interleaved coded modulation (BICM), which can get a better performance of bit error ratio (BER) and approach the Shannon limit. An experiment of the proposed 11-QAM constellation is carried out to transmit data over 25-km standard single-mode fiber (SSMF) in the polarization division multiplexed coherent optical communication system. Results show that when the data rate reaches 33Gbps, the proposed GS/PS 11-QAM scheme respectively outperforms the traditional uniformly distributed star 8-QAM and the traditional PS 9-QAM by 2.9dB and 1.2dB in OSNR. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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