COHERENT DIGITAL FILTER Russian patent published in 2014 - IPC G01S13/524 

FIELD: radio engineering, communication.

SUBSTANCE: filter includes a coherent oscillator, a binary amplitude quantiser, connected to quadrature channel which include a phase detector, an analogue-to-number converter, N-1 memory units, where N is the number of processed pulses. The filter also includes a clock-pulse generator, a sine and cosine weight coefficient set former and a Doppler frequency filter set, each consisting of four channels connected to inputs of a digital functional envelope former of the Doppler frequency filter, said channels including digital multipliers, wherein each quadrature channel also includes an additional memory unit, the input of which is connected to the output of the last memory unit of the quadrature channel, and each channel of Doppler frequency filters includes a subtractor, a memory unit and a two-input adder, wherein the outputs of the digital multipliers are connected to inputs of the subtractor, the output of which is connected to the first input of the adder, the second input of the adder is connected to the memory unit of the Doppler frequency filter, and the output of the adder is connected to the input of the memory unit of the Doppler frequency filter and the input of the digital functional enveloper former.

EFFECT: faster operation.

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