Joint timing and frequency synchronization based on weighted CAZAC sequences for reduced-guard-interval CO-OFDM systems

Autor:	Omomukuyo, Oluyemi, Chang, Deyuan, Zhu, Jingwen, Dobre, Octavia, Venkatesan, Ramachandran, Ngatched, Telex, Rumbolt, Chuck
Rok vydání:	2018
Předmět:	Electrical Engineering and Systems Science - Signal Processing
Zdroj:	Opt. Express., vol. 23, no. 5, pp. 5777-5788, Mar. 2015
Druh dokumentu:	Working Paper
DOI:	10.1364/OE.23.005777
Popis:	A novel joint symbol timing and carrier frequency offset (CFO) estimation algorithm is proposed for reduced-guard-interval coherent optical orthogonal frequency-division multiplexing (RGI-CO-OFDM) systems. The proposed algorithm is based on a constant amplitude zero autocorrelation (CAZAC) sequence weighted by a pseudo-random noise (PN) sequence. The symbol timing is accomplished by using only one training symbol of two identical halves, with the weighting applied to the second half. The special structure of the training symbol is also utilized in estimating the CFO. The performance of the proposed algorithm is demonstrated by means of numerical simulations in a 115.8-Gb/s 16-QAM RGI-CO-OFDM system. Comment: 13 pages, 9 figures, Journal
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1801.01601 Zobrazit plný text záznamu View this record from Arxiv