Improving performance of channel equalization in RSOA-based WDM-PON by QR decomposition

Improving performance of channel equalization in RSOA-based WDM-PON by QR decomposition
Title:
Improving performance of channel equalization in RSOA-based WDM-PON by QR decomposition
Other Titles:
Optics Express
Keywords:
Publication Date:
08 October 2015
Citation:
Xiang Li, Wen-De Zhong, Arokiaswami Alphones, Changyuan Yu, and Zhaowen Xu, "Improving performance of channel equalization in RSOA-based WDM-PON by QR decomposition," Opt. Express 23, 27299-27305 (2015)
Abstract:
In reflective semiconductor optical amplifier (RSOA)-based wavelength division multiplexed passive optical network (WDM-PON), the bit rate is limited by low modulation bandwidth of RSOAs. To overcome the limitation, we apply QR decomposition in channel equalizer (QR-CE) to achieve successive interference cancellation (SIC) for discrete Fourier transform spreading orthogonal frequency division multiplexing (DFT-S OFDM) signal. Using an RSOA with a 3-dB modulation bandwidth of only ~800 MHz, we experimentally demonstrate a 15.5-Gb/s over 20-km SSMF DFT-S OFDM transmission with QR-CE. The experimental results show that DFTS-OFDM with QR-CE attains much better BER performance than DFTS-OFDM and OFDM with conventional channel equalizers. The impacts of several parameters on QR-CE are investigated. It is found that 2 sub-bands in one OFDM symbol and 1 pilot in each sub-band are sufficient to achieve optimal performance and maintain the high spectral efficiency.
License type:
PublisherCopyrights
Funding Info:
SERC Project No: 1420200044
Description:
Full paper can be downloaded from the Publisher's URL provided.
ISSN:
1094-4087
Files uploaded:
File Size Format Action
There are no attached files.