Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
850162 | Optik - International Journal for Light and Electron Optics | 2013 | 5 Pages |
Abstract
To improve the accuracy of the channel estimation in PDM-CO-OFDM system when LS algorithm is used, a joint denoising method is proposed in this paper. We have theoretically proposed and simulated designed scattered pilot pattern for PDM-CO-OFDM system, then multi-wavelet is used to denoise the LS channel estimation results which have been interpolation in frequency domain, ISFA is further used to denoise signals after interpolation in time domain. Simulation results show that for 4-QAM, 80 GB/s PDM-CO-OFDM system, the proposed joint denoising method has improved 0.96 dB in OSNR sensitivity at the BER of 1e−3 (threshold of FEC) compared to the common LS method and reduced system overhead at the same time.
Related Topics
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Engineering (General)
Authors
Jianfei Liu, Jie Li, Xiangye Zeng, Jia Lu, Mengjun Wang,