UDC 621.391:621.396.96
PROCESSING OF NON-EQUIDISTANT SIGNALS AGAINST PASSIVE INTERFERENCE BACKGROUND
D. I. Popov, Dr. Sc. (Tech.), full professor, RSREU, Ryazan, Russia;
orcid.org/0000-0003-0342-8208, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The processing of non-equidistant coherent pulse radar signals in the presence of passive interference is considered. The aim of the work is synthesis and analysis of algorithms and systems for processing nonequidistant coherent pulse signals. A statistical description of radar signals and interference during the period of repetition of probing pulses is given. Based on the likelihood ratio, the algorithms and the corresponding system for optimal processing of non-equidistant signals of moving targets against passive interference background are synthesized. A block diagram of optical processing system is presented including matrix filter, weighing unit and multi-channel filter. The measurement of target radial velocity by a channel number in which the signal was detected is considered. The condition for choosing the parameters of wobble law is given, which provides unambiguous measurement of radial velocity over the entire range of real target speeds. The analysis of synthesized processing algorithms is carried out depending on correlation properties of interference and wobble parameters. The results of the analysis set the limit to which the efficiency of real signal processing systems should strive
Key words: processing algorithms, algorithm analysis, repetition period wobble, Doppler phase, correlation matrix, passive interference, probability density, radial velocity, block diagram of signal processing system.