S.A. Borodin - Engineer, Research Institute «Vector» (Saint Petersburg). E-mail: borodins1990@gmail.com
D.N. Pavlenko - Head of Department, Research Institute «Vector» (Saint Petersburg). E-mail: pavlenko.vector@nm.ru

This article dedicates to the 4 channel device that performs detection and direction finding of signals, received from the radar with low probability of intercept (LPI) with duration from 4 to 600 ms after detecting them in the 10GHz band by amplitude method. The device is a printed circuit board, which performs digitizing and digital signal processing of the detected signals incoming from the antennas in the digital form by the ADC and a high-performance DSP- processor. This article describes the methods of digital signal processing implemented in the processor. Most of the digital processing is performed by the microprocessor-s hardware resources, to reduce energy consumption and save CPU time. By processing the detected signal using economical processor, device achieved high sensitivity with low power consumption, which allows using the device in portable battery-powered designs. Developed signal processing board has certain advantages compared to similar devices, which in some cases makes the use of this device expedient.