[ThC2] Coherent Transmission

[ThC2-3] Sparse-fast-Fourier-Transform Assisted Timing/Frequency Synchronization for Optical Coherent Receivers

〇Jianing Lu¹, Qiong Wu², Hexun Jiang², Songnian Fu², Ming Tang², Chao Lu¹ (¹The Hong Kong Polytechnic Univ., Hong Kong, ²Huazhong Univ. of Science and Technology, China)

Keywords:Digital signal processing techniques for optical communications

We propose an efficient timing/frequency synchronization assisted by sparse FFT and optimized training symbols. The proposed scheme is proved to be robust at low SNR can achieve complete frequency offset estimation range with ultra-low complexity.