Data-Aided Versus Blind Single-Carrier Coherent Receivers
Data-Aided Versus Blind Single-Carrier Coherent Receivers
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DOI：
10.1109/jphot.2010.2048308
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发表时间：
2010-04
影响因子：
2.4
通讯作者：
M. Kuschnerov;M. Chouayakh;K. Piyawanno;B. Spinnler;E. Man;P. Kainzmaier;M. Alfiad;A. Napoli
中科院分区：
文献类型：
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作者：
M. Kuschnerov;M. Chouayakh;K. Piyawanno;B. Spinnler;E. Man;P. Kainzmaier;M. Alfiad;A. Napoli
第一代相干通信系统信号处理的光纤研究主要由盲自适应接收器主导。下一代系统将需要针对更高阶调制格式的可扩展和模块化设计。由于光纤通道的性质和高速接收器所需的并行化，数据辅助和盲算法在用于采用高阶调制格式的相干光接收器时需要进行总体重新评估。本文从复杂性、跟踪能力和收敛速度方面对相干单载波光学系统的盲接收机和数据辅助接收机进行了比较。讨论了基于时域和频域的接收器的均衡方法，涵盖了最重要的算法。证明了数据辅助频域均衡的总体优越性。
Fiber-optic research in signal processing for the first generation of coherent communication systems was dominated by receivers with blind adaptation. Next-generation systems will require a scalable and modular design for higher order modulation formats. Due to the nature of the fiber channel and the required parallelization in high-speed receivers, data-aided and blind algorithms call for a general reassessment when used in coherent optic receivers employing higher order modulation formats. In this paper, blind and data-aided receivers are compared for coherent single-carrier optical systems in terms of complexity, tracking ability, and convergence speed. Methods for equalization are discussed for time-domain- and frequency-domain-based receivers covering the most important algorithms. The general superiority of data-aided frequency-domain equalization is demonstrated.