Channel Estimation Using Superimposed Training for Coherent Optical OFDM Systems

Author(s):  
Changjian Guo ◽  
Zhang Han ◽  
Lingchen Huang
2012 ◽  
Vol E95.B (9) ◽  
pp. 2926-2930
Author(s):  
Qinjuan ZHANG ◽  
Muqing WU ◽  
Qilin GUO ◽  
Rui ZHANG ◽  
Chao Yi ZHANG

2014 ◽  
Vol 602-605 ◽  
pp. 3165-3168 ◽  
Author(s):  
Han Dong Wang ◽  
Li Qun Huang ◽  
Feng Yao

In this paper, in order to improve the security of optical OFDM system, we propose a new method to generate the pilot sequence of channel estimation using chaotic sequence. Firstly, we assign initial values to chaotic system, and calculate a chaotic sequence through an iteration method, then converting it into a binary sequence as the pilot of a DFT-based channel estimation algorithm. When the receiving end doesn’t know the chaotic-sequence-based pilot, the system will have very high BER, and can not restore the original data, which indicate that the new method provides a certain degree of security for optical OFDM systems without increasing the system complexity.


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