SIGNALS PROCESSING DEVICE IN GROUND AND SPACE FORWARD-SCATTERING RADAR SYSTEM Russian patent published in 2017 - IPC G01S3/72 

FIELD: radars.

SUBSTANCE: invention relates to radars and can be used for processing signals when detecting stealth targets in ground and space forward-scattering radar systems (RS). Simplified design of antenna feeder units and reduced weight and dimensions is achieved due to that different antennae are not required for reception of direct and scattered signals, neither multi-frequency transceiving modules, nor high-sensitive receivers. Higher stealthiness of the proposed forward-scattering RS is achieved by using as the sounding continuous signal the one with digital modulation, the width of spectrum of which considerably exceeds the range of possible Doppler frequency shifts when reflecting from detected targets. To achieve the specified technical result in a device containing a transmitting position of a transmitter and an antenna, a receiving position, which includes a receiving antenna, N receivers, N units for measuring the Doppler frequency with connected outputs to N inputs of the unit for determining bearing, the output of which is the output of the device, there is at the receiving position between each receiver and the unit for measuring the Doppler frequency a signals processing device including series-connected: a demodulator, a coherent accumulator, a direct signal generator and a subtractor, as well as a delay line, the input of which is connected to the output of the receiver, and the output – to the second input of the subtractor, herewith the transmitting position is located in space, emits a continuous signal with digital modulation and generates one “wide” beam covering the entire zone of scanning, and on the ground receiving position there are N partial beams.

EFFECT: technical result of the proposed invention is reduction of cost of a ground and space forward-scattering RS as a whole not requiring launching new satellites while simplifying the design of antenna feeder units, reducing weight and overall dimensions and the increase of the forward-scattering RS stealthiness.

1 cl, 4 dwg