Improved Receiver Design for Layered ACO-OFDM in Optical Wireless Communications

被引:33
作者
Wang, Qi [1 ,2 ]
Wang, Zhaocheng [2 ]
Guo, Xuhan [3 ]
Dai, Linglong [2 ]
机构
[1] Tsinghua Univ, Dept Elect Engn, Tsinghua Natl Lab Informat Sci & Technol, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Dept Elect Engn, Tsinghua Natl Lab Informat Sci & Technol, Beijing 100084, Peoples R China
[3] Univ Cambridge, Dept Engn, Ctr Photon Syst, Elect Engn Div, Cambridge CB3 0FA, England
基金
英国工程与自然科学研究理事会; 中国国家自然科学基金;
关键词
Layered asymmetrically clipped optical orthogonal frequency division multiplexing (LACO-OFDM); intensity modulation with direct detection (IM/DD); optical wireless communication (OWC); iterative receiver; VISIBLE-LIGHT COMMUNICATIONS; DCO-OFDM; PAM-DMT; SYSTEMS;
D O I
10.1109/LPT.2015.2495320
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Layered asymmetrically clipped optical orthogonal frequency division multiplexing (LACO-OFDM) is recently proposed for intensity-modulated directed-detected optical wireless communications, which achieves higher spectral efficiency compared with the conventional ACO-OFDM, since different layers of ACO-OFDM signals are combined to utilize more subcarriers. In this letter, an improved receiver is proposed for LACO-OFDM, which distinguishes different layers of ACO-OFDM signals in the time domain. After that, the structure of ACO-OFDM signals in each layer is exploited to further reduce the noise and inter-layer interference, resulting in the improved performance. Simulation results show that the proposed receiver for LACO-OFDM achieves significant gain over its conventional counterpart.
引用
收藏
页码:319 / 322
页数:4
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