• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Optical and quantum electronics >Multi-rate OCDMA system BER performance evaluations for different ML-code sequences
【24h】

Multi-rate OCDMA system BER performance evaluations for different ML-code sequences

机译：不同ML代码序列的多速率OCDMA系统BER性能评估

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper analyzes Bit Error Rate (BER) of Optical Code Division Multiple Access (OCDMA) networks for different class of services which are data, voice, and video; whereas Multi-Length Weighted Modified Prime Code (ML-WMPC) sequences are utilized as a spreading code in with respect to previously used ML-Optical Orthogonal codes. Due to variations in bit rates between the mentioned services, each of them assigns a different WMPC sequence length. In addition, the shot noise, thermal noise, and the Multiple Access Interference (MAI) are included and considered as sources of noise in the BER performance analysis. Furthermore, Pulse Position Modulation, Manchester encoding and MAI cancellation (MAIC) technique are utilized to improve the network performance at a higher number of active users. For analysis, the BER performance calculations are investigated for three types of OCDMA receivers such as simple receiver, receiver with MAIC technique, and receiver with MAIC and Manchester encoding. Moreover, the BER mathematical models have been introduced for different bit rates according to the type of service in the presence of the ML-WMPC and the last of three mentioned OCDMA receivers. Finally, these models and their results are compared with the other existing models, where the results show an improvement in BER performance in the proposed approach.
机译：本文分析了用于不同类别的多种服务的光学码分区多址（OCDMA）网络的误码率（BER）;而多长度加权修改的主要代码（ML-WMPC）序列被用作相对于先前使用的ML光正交码的扩展码。由于所提到的服务之间的比特率变化，它们中的每一个分配不同的WMPC序列长度。此外，镜头噪声，热噪声和多次访问干扰（MAI）包括在内，并被视为BER性能分析中的噪声源。此外，利用脉冲位置调制，曼彻斯特编码和MAI消除（MAIC）技术来提高较数较高数量的活动用户的网络性能。对于分析，研究了BER性能计算，用于三种类型的OCDMA接收器，如简单的接收器，带有MAIC技术的接收器，以及带有MAIC和曼彻斯特编码的接收器。此外，根据存在ML-WMPC存在的服务类型和三个提到的OCDMA接收器的最后一次，已经引入了不同比特率的BER数学模型。最后，这些模型及其结果与其他现有型号进行了比较，结果表现出在提出的方法中提高了BER性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号