Digital interference signal filtering on laser interface for optical fiber communication

INTRODUCTION: Fiber laser communication is a method that uses and fiber medium to realize data transmission information output OBJECTIVES: In order reduce the signal interference of optical interface ensure quality network. A filtering based on digital technology designed. METHODS: this paper, model network firstly constructed, noise input into filter bank. The quadrature least square algorithm are used separate denoised signals crosstalk between in channel. way, component can be filtered out, better processing effect achieved. RESULTS: results peak signal-to-noise ratio above 25, which effectively filters signal, retains effective completely. intelligibility 0.94, highest value 0.986. distortion degree all below 0.025, minimum 0.004. bit error rate 0.001, ensures CONCLUSION: experimental show reduction proposed good, provides reliable basis for separating interface.