Narrowband interference suppression apparatus

摘要

The device belongs to the field of radio electronics and can be used in radio receivers operating under narrowband interference conditions. The technical problem, the solution of which is directed to the claimed device, is to provide suppression of narrowband interference regardless of the probability density of the interference amplitude and to exclude the suppression of the useful signal at the output of the device under the influence of low power interference or complete absence of interference. The solution of this problem is achieved by the fact that the device contains an amplitude detector, the input of which is a mixture of useful signal and noise, Q nonlinear elements, orthogonalization and normalization unit, 2Q multipliers, Q matched filters, weighting unit and adder, the input of each nonlinear element is connected to the output of the amplitude detector, the output of each non-linear element is connected to the corresponding input of the orthogonalization and normalization unit, the corresponding output of which is connected to the first input of the corresponding multiplier whose second input is connected to the input of the amplitude detector and the output is connected to the input of the corresponding matched filter whose output is connected to the corresponding input of the weight coefficients, and also with the first input of the corresponding multiplier whose second input is connected to the corresponding output of the block, you the number of weight coefficients, and the output is connected to the corresponding input of the common adder, at the output of which we obtain a useful signal with a significantly suppressed noise. the corresponding output of which is connected to the first input of the respective multiplier whose second input is connected to the input of the amplitude detector and the output is connected to the input of a corresponding matched filter whose output is connected to the corresponding input of the weighting coefficient unit and also to the first input of the corresponding multiplier whose second input is connected to the corresponding output of the weighting coefficient calculator, and the output is connected to the corresponding input of the common adder, at the output of which th we get a useful signal with a significantly suppressed noise. the corresponding output of which is connected to the first input of the respective multiplier whose second input is connected to the input of the amplitude detector and the output is connected to the input of a corresponding matched filter whose output is connected to the corresponding input of the weighting coefficient unit and also to the first input of the corresponding multiplier whose second input is connected to the corresponding output of the weighting coefficient calculator, and the output is connected to the corresponding input of the common adder, at the output of which th we get a useful signal with a significantly suppressed noise.