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针对高模式群时延(H-MGD)的少模光纤模分复用系统,提出了一种级联独立成分分析(C-ICA)算法,其基本思想是:采用延时补偿与C-ICA结合的技术方案,运用两次ICA算法同时消除模分复用器和解复用器引起的串扰。利用该算法对2×2模分复用系统进行了解复用,并且将其解复用性能与单次ICA算法解复用进行了比较。仿真结果表明,C-ICA算法能够有效实现H-MGD少模光纤模分复用系统的解复用,在同等条件下其解复用效果明显优于单次ICA解复用。
A new C-ICA (cascaded independent component analysis) algorithm is proposed for low mode fiber mode division multiplex system with high mode group delay (H-MGD). The basic idea is to use delay compensation and C-ICA Combined with the technical solution, the ICA algorithm is used twice to eliminate the crosstalk caused by the MUX and the demultiplexer simultaneously. The algorithm is used to demultiplex the 2 × 2 MIMO system, and its demultiplexing performance is compared with the single ICA algorithm demultiplexing. The simulation results show that the C-ICA algorithm can effectively demultiplex the H-MGD optical fiber modular multiplexing system, and its demultiplexing effect is obviously better than single ICA demultiplexing under the same conditions.