FIELD: communication technology.
SUBSTANCE: present invention relates to fiber-optic communication technology. The expected result is achieved by the fact that in the service training mode of the compensator 2, a known sequence consisting of an odd number of characters is used, and all characters, with the exception of the central one, are “0”, and only the central one is “1”; the number of characters in the training sequence is determined by the distorted pulse response, previously measured at the output of the optical fiber of the line, or estimated through a known value of the differential mode delay; the training sequence is repeatedly sent with accumulation and subsequent averaging; then, as a result of mathematical processing, a mask is formed, which is recorded in the storage module 13; in normal operation mode, after passing the line and converting in the photodetector, the information signal enters the memory module 11, which records a fragment of this signal with a duration similar to the duration of the training sequence, this fragment of the information signal enters the adder 14, where the reference signal of the mask is subtracted; then the last character is allocated from the processed fragment, which enters the decisive device 9; at the same time, the missing fragment of the signal from the output of the photodetector 6 is reloaded into the memory module 11 to achieve the desired duration with a one-character shift on the time scale, so that the penultimate character of the previous fragment of the information signal becomes the last character, the procedure for subtracting the mask reference signal is carried out in the adder 14, the last character enters the resolver 9, and then the described procedure is repeated again.
EFFECT: compensation for dispersion distortions of the optical signal in a multimode fiber-optic transmission line operating in limited mode regime.
1 cl, 1 dwg
