Optical CDMA with time hopping and power control for multimedia networks
Optical CDMA with time hopping and power control for multimedia networks
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用于多媒体网络的具有跳时和功率控制的光 CDMA
DOI：
10.1109/jlt.2003.809562
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发表时间：
2003
影响因子：
4.7
通讯作者：
T. Kobayashi
中科院分区：
文献类型：
--
作者：
H. Yashima;T. Kobayashi
提出了一种用于高速多媒体传输的光码分多址（OCDMA）技术，并对其性能进行了研究。提出的系统引入跳时来改变传输比特率和功率控制来控制传输信号性能，这允许具有不同期望速率和性能的各种信号。推导出该系统的误码率（BER）的表达式，并给出了数值结果。提出了一种与硬限幅器耦合的光功率选择器（OPS），以提高系统性能。OPS是一种传输输入信号中瞬时最大光功率的设备。OPS与光硬限幅器相结合，减少了来自同时用户的干扰，从而改善了误码率。BER的理论推导和数值结果的一些参数。我们表明，该系统显着提高误码率，是一个有吸引力的计划，为未来的多媒体网络。
Optical code-division multiple access (OCDMA) for high-speed multimedia transmission is proposed and its performance is investigated. The proposed system introduces time hopping to vary transmission bit rate and power control to control transmission signal performance, which allows various signals with different desired rate and performance. An expression for the bit error rate (BER) of the proposed system is derived and numerical results are shown. An optical power selector (OPS) coupled with a hard limiter are also proposed to improve system performance. The OPS is a device to transmit the instantaneous maximum optical power among input signals. The OPS combined with the optical hard limiter reduces the interference from simultaneous users which results in an improved BER. BER is theoretically derived and numerical results for some parameters are shown. We show that the proposed system significantly improves BER and is an attractive scheme for future multimedia networks.