After the analysis of the test resu

After the analysis of the test results in Table 2, it canbe concluded that the speech quality, intelligibility anddistortion of the signal have different changes after theapplication of the proposed method under different SNR.Among them, the speech quality index results are allabove 4.0 and close to the maximum limit of the value toa large extent. The intelligibility values are all above 0.94,and the highest value is 0.986. The results of distortiondegree are all below 0.025, and the minimum value is0.004. The results show that the proposed method hasgood applicability, effectively reduces the signal noiseinterference of optical fiber network laser interface, andensures the communication quality of the network.Because the digital quadrature filtering method and theleast square algorithm can effectively separate andprocess the denoised signal. Thus, the communicationquality is effectively improved.