METHOD AND DEVICE OF FAST CALCULATION OF AMBIGUITY FUNCTION OF SIGNAL TAKING INTO ACCOUNT REVERBERATION INTERFERENCE

摘要

FIELD: radio engineering, communication.;SUBSTANCE: apparatus for calculating a signal uncertainty function based on reverberation interference has an analogue-to-digital converter whose output is connected to the input of a recirculator, the output of which is connected to the input of a fast Fourier transform computer, the output of which is connected to the first input of a multiplier unit. The apparatus further includes: a negative frequency nulling unit, the input of which is the output of the fast Fourier transform computer, and the output is connected to the first input of the multiplier unit; read-only memory, the output of which is connected to the second input of the multiplier unit, the output of which is the input of a unit for calculating two-dimensional inverse fast Fourier transform, the output of which is connected to the input of a squared modulus computer, the output of which is the output of the apparatus; a control device whose outputs are connected to control inputs of the analogue-to-digital converter, the fast Fourier transform computer, the multiplier, the unit for calculating two-dimensional inverse fast Fourier transform and the squared modulus computer.;EFFECT: high noise-immunity of detecting signals on the background of reverberation interference.;3 dwg