PAM-DMT for Intensity-Modulated and Direct-Detection Optical Communication Systems

被引:188
作者
Lee, Sian C. Jeffrey [1 ]
Randel, Sebastian [2 ]
Breyer, Florian [3 ]
Koonen, Antonius M. J. [1 ]
机构
[1] Tech Univ Eindhoven, COBRA Res Inst, NL-5600 MB Eindhoven, Netherlands
[2] Siemens AG, Corp Technol, Informat & Commun, D-81739 Munich, Germany
[3] Tech Univ Munich, Lehrstuhl Nachrichtentech, D-80333 Munich, Germany
关键词
Intensity modulation; optical fiber communication; orthogonal frequency-division multiplexing (OFDM); OFDM;
D O I
10.1109/LPT.2009.2032663
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
A novel concept of pulse-amplitude-modulated discrete multitone modulation (PAM-DMT) is presented. It is shown that by pulse amplitude modulation of the subcarriers used, the resulting PAM-DMT time signal can be clipped asymmetrically to achieve a unipolar signal for transmission. The distortion resulting from this asymmetric clipping is orthogonal to the information signal itself, causing no additional penalty. Especially in intensity-modulated direct-detection optical channels, where a unipolar signal is to be transmitted, it is shown that this idea can improve system performance.
引用
收藏
页码:1749 / 1751
页数:3
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