Serial feedback interference suppression algorithm for
multi-user interference suppression

doi:10.3969/j.issn.1007-5461.2021.06.017

Abstract

Abstract: In the multi-user optical code division multiple access (OCDMA) transmission system, multi-user interference (MAI) seriously affects the transmission performance of the system. In view of the fact that the multi-user interference comes from the incomplete orthogonality of codewords, the received signal and the system damage can be expressed by the autocorrelation and the crosscorrelation functions of codewords. A new research idea regarding the multi-user interference as the effective information that can be reconstructed is introduced to suppress the multi-user interference, and a serial feedback interference suppression algorithm based on the digital signal processing technology is proposed. A simulation platform for two users synchronous access spectrum amplitude code optical code division multiple access (SAC-OCDMA) transmission system is built to verify the effectiveness of the algorithm in suppressing the multi-user interference. The simulation results show that compared with the optical threshold device, the serial feedback interference suppression algorithm can suppress the multi-user interference better, the improvement of the system transmission performance is greater, while the power penalty introduced is only 2.3 dB.

Key words: optical communication, optical code division multiple access, multi-user interference, serial feedback interference suppression algorithm

CLC Number:

TN929.12

SU Guorui , LIN Haokun , PU Tao ∗ , ZHENG Jilin , TAN Yeteng , MOU Weifeng . Serial feedback interference suppression algorithm for multi-user interference suppression[J]. Chinese Journal of Quantum Electronics, 2021, 38(6): 880-888.

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Serial feedback interference suppression algorithm for multi-user interference suppression

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