Heterodyne direct-detection OOFDM system with low sampling rate  

作　　者：程林 闻和 郑小平 张汉一 郭奕理 

机构地区：[1]State Key Laboratory on Integrated Optoelectronics/Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University

出　　处：《Chinese Optics Letters》2010年第9期819-822,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos.60736003 and 60932004);the National "863" Project of China (Nos. 2009AA01Z222, 2009AA01Z223, and2009AA01Z256);the National "973" Project of China(No. 2006CB302805);the Project iCHIP financed by Italian Ministry of Foreign Affairs

摘　　要：A method of multi-channel receiving for high bit rate heterodyne direct-detection optical orthogonal frequency-division-multiplexing （OOFDM） system is proposed to reduce the sampling rate demand of analog-to-digital converter （ADC）. The sampling rate of ADCs can be reduced to 1/N that of the original signal bandwidth in an N-channel receiving system. Aided by a succeeding digital signal processing （DSP） at the receiver, aliasing free signal can be recovered. A back-to-back experimental result is given for a 4-channel system, based on which, a down conversion process for heterodyne can be reduced. The signal rebuilding algorithm is given and analyzed in its complexity and noise tolerance.A method of multi-channel receiving for high bit rate heterodyne direct-detection optical orthogonal frequency-division-multiplexing （OOFDM） system is proposed to reduce the sampling rate demand of analog-to-digital converter （ADC）. The sampling rate of ADCs can be reduced to 1/N that of the original signal bandwidth in an N-channel receiving system. Aided by a succeeding digital signal processing （DSP） at the receiver, aliasing free signal can be recovered. A back-to-back experimental result is given for a 4-channel system, based on which, a down conversion process for heterodyne can be reduced. The signal rebuilding algorithm is given and analyzed in its complexity and noise tolerance.

关 键 词：Digital signal processing HETERODYNING Signal processing Signal receivers 

分 类 号：TN919.3[电子电信—通信与信息系统]