Abstract
Layered asymmetrically clipped optical orthogonal frequency-division multiplexing (L-ACO-OFDM) is power and spectral efficient scheme for intensity-modulation and direct-detection systems. However, the non-flat signal-to-noise ratio (SNR) condition over OFDM subcarriers due to the non-perfect frequency responses of devices and optical fiber link will degrade the bit error ratio (BER) performance. Furthermore, the errors will propagate to the higher layers during the L-ACO-OFDM demodulation. As a result, the receiver sensitivity of L-ACO-OFDM systems will be reduced. In this paper, the layered precoding technique is applied to the L-ACO-OFDM system to average SNR over OFDM subcarriers separately in each layer. The numerical simulations show that both layered discrete Fourier transform (DFT) and layered orthogonal circulant matrix transform (OCT) precoded L-ACO-OFDM systems have a similar receiver sensitivity, but have better receiver sensitivity than the uncoded L-ACO-OFDM system at a BER of 1e-3.
© 2018 The Author(s)
PDF ArticleMore Like This
Siyi Dong, Jing He, Ming Chen, Qinghui Chen, Rui Deng, Jie Ma, and Lin Chen
Th3I.1 Conference on Lasers and Electro-Optics/Pacific Rim (CLEO/PR) 2018
Wu Liu, Chao Yang, and Ming Luo
M4A.255 Asia Communications and Photonics Conference (ACP) 2020
Qibing Wang, Binhuang Song, Bill Corcoran, and Arthur James Lowery
W2A.50 Optical Fiber Communication Conference (OFC) 2018