Fiber-optic digital video multiplexing using optical CDMA
Fiber-optic digital video multiplexing using optical CDMA
复制标题
使用光纤 CDMA 的光纤数字视频复用
DOI：
10.1109/50.210566
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
E. Park
中科院分区：
文献类型：
--
作者：
R. Gagliardi;A. Mendez;M. Dale;E. Park
提出了采用码分多址（CDMA）形式的激光脉冲在光纤网络上复用一组数字视频信号。激光脉冲被用来产生识别每个源的唯一代码序列地址，并且视频数据被调制在这些序列上。提出了使用脉冲位置调制（PPM）的数字编码，其具有允许光学和电子处理的有效集成的优点。数据恢复是通过光学相关的序列识别，其次是标准的电子PPM解码。的编码，解码和光学的关键系统参数之间的关系推导出，并表示压缩视频速率之间的5和20 Mb/s/通道，25-50通道，是可能的相对标准的硬件。南加州大学在该系统上进行的实验结果表明，光纤复用的CDMA概念的可行性。
The use of laser pulsing in the form of code-division multiple access (CDMA) to multiplex a set of digital video signals over a fiber network is proposed. The laser pulsing is used to generate unique code sequence addresses which identify each source, and the video data are modulated on these sequences. Digital encoding using pulse position modulation (PPM) is proposed, having advantages that permit efficient integration of optical and electronic processing. Data recovery is achieved by optical correlation for sequence recognition, followed by standard electronic PPM decoding. The relation between key system parameters of the encoding, decoding, and optics is derived, and indicates that compressed video rates between 5 and 20 Mb/s/channel, with 25-50 channels, is possible with relatively standard hardware. Experimental breadboard results being carried out at USC on this system indicate the feasibility of the CDMA concept for fiber multiplexing.