论文标题
电力有效直流偏置光学OFDM系统的迭代符号恢复
Iterative Symbol Recovery For Power Efficient DC Biased Optical OFDM Systems
论文作者
论文摘要
正交频部多路复用（OFDM）已证明自己是一种有效的多载波数字通信技术。近年来，由于其光谱效率和对频率选择通道的固有弹性和窄带干扰，对光学OFDM的兴趣已显着增长。由于这些原因，目前被认为是短纤维链接中部署的领先候选人之一，例如用于DATA间中心通信的候选人。在本文中，我们为在强度调制直接检测（IM/DD）系统中提供了针对DC偏置光学OFDM（DCO-OFDM）的新的发电符号恢复方案。我们引入了一种剪裁的替代方法，以维持非负实价的信号并仍然保留信息，该信号在使用剪辑时会丢失，并提出了该方法的迭代检测算法。与传统的DC OFDM相比，传统的噪声免疫力（在SNR中获得3 $ [db]的增加）降低了$ 50 \％$，以及与传统的DC Ofdm相比，DC偏见为$ 2 $ $ 2 $的标准偏差，OFDM的dc ofdm偏差为$ 10 $ 10^$ 10^$ 10^ - 3} $ notial new new sermian for ofdm信号，以实现（AWGN）扁平频道模型。
Orthogonal frequency division multiplexing (OFDM) has proven itself as an effective multi-carrier digital communication technique. In recent years the interest in optical OFDM has grown significantly, due to its spectral efficiency and inherent resilience to frequency-selective channels and to narrowband interference. For these reasons it is currently considered to be one of the leading candidates for deployment in short fiber links such as the ones intended for inter-data-center communications. In this paper we present a new power-efficient symbol recovery scheme for dc-biased optical OFDM (DCO-OFDM) in an intensity-modulation direct-detection (IM/DD) system. We introduce an alternative method for clipping in order to maintain a non-negative real-valued signal and still preserve information, which is lost when using clipping, and propose an iterative detection algorithm for this method. A reduction of $50\%$ in the transmitted optical power along with an increase of signal-independent noise immunity (gaining $3$[dB] in SNR), compared to traditional DCO-OFDM with a DC bias of $2$ standard deviations of the OFDM signal, is attained by our new scheme for a symbol error rate (SER) of $10^{-3}$ in a QPSK constellation additive white gaussian noise (AWGN) flat channel model.
