• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Optical and quantum electronics >Evaluation of coherent homodyne and heterodyne optical CDMA structures
【24h】

Evaluation of coherent homodyne and heterodyne optical CDMA structures

机译：相干零差和外差光学CDMA结构的评估

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 evaluates the coherent optical code-division multiple-access (OCDMA) techniques and examines the overall system performance in terms of signal-to-noise ratio (SNR) penalty as a function of simultaneous users accommodated to maintain an appropriate value of the bit-error rate (BER) for homodyne and heterodyne detections. As spreading codes, the proposed structures are utilizing a recently introduced prime code family hereby referred to as double-padded modified prime code (DPMPC). As a coherent modulation, binary phase-shift keying (BPSK) format is deployed. In homodyne detection, two different phase modulations are studied including either an external phase-modulator or injection-locking methods. The phase limitation and the performance for two methods plus multiple-access interferences (MAI) and receiver noise in a shot-noise limited regime are investigated. In heterodyne detection, BER analysis of the system based on only external phase modulator is examined. It is found that by maintaining BER = 10~(-9), this system can accommodate an increased number of simultaneous users to compare with systems which employ conventional bipolar codes.
机译：本文对相干光码分多址（OCDMA）技术进行了评估，并根据信噪比（SNR）损失来检验整个系统的性能，该损失是同时用户保持适当比特值的函数零差和外差检测的错误率（BER）。作为扩展码，提出的结构利用了最近引入的素码系列，在此称为双填充修改素码（DPMPC）。作为相干调制，部署了二进制相移键控（BPSK）格式。在零差检测中，研究了两种不同的相位调制，包括外部相位调制器或注入锁定方法。研究了两种方法的相位限制和性能，以及在散粒噪声限制下的多址干扰（MAI）和接收机噪声。在外差检测中，只检查基于外部相位调制器的系统的BER分析。已经发现，通过保持BER = 10〜（-9），该系统可以容纳更多的同时用户，以与采用常规双极性码的系统进行比较。

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