Підвищення ефективності роботи багатофункціональних радіолокаторів. Частина 2: Цифрова обробка сигналів у багатофункціональних радіолокаторах

Abstract

The algorithm of correlation-weighing processing of quasi-continuous radar signals is analyzed and recommendations on the use of variants of the algorithm of spectral analysis are given. The communication system using differential binary phase modulation and orthogonal code coding is analyzed. The analytical expression for estimating losses in relation to the noise signal caused by the use of differential modulation is derived. It is shown that these losses can reach significant values of the order of 10 dB. Simple methods of soft differential demodulation are considered, which are close to the optimal criterion for the maximum likelihood ratio. The results of simulation of the considered communication channel are presented. An overview of the generation and processing of signals for the modern version of the multifunctional radar is carried out. The equipment is based on digital methods using a combination of programmable logic integrated circuits and programmable signal processors. A multiprocessor programmable digital signal processing device with productivity of more than 100 Gflop / s is considered. The device is intended for solving radar and communication problems in ground mobile multifunctional monopulse radars (BFR).