UDC 621.396.2
RESEARCH OF THE NOISES' ANGULAR POWER SPECTRUM IN A MULTI-CHANNEL RECEIVING SYSTEM WITH MUTUAL COUPLING AND LOAD IMPEDANCES' OPTIMIZATION
M. V. Grachev, junior researcher, RSREU, Ryazan, Russia;
orcid.org/0000-0003-1725-9257, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Yu. N. Parshin, Dr. Sc. (Tech.), full professor, Department of Radio Engineering Devices, Head of the Department, Ryazan, Russia; orcid.org/0000-0003-0061-7804, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The article considers a multi-channel receiving system with channel mutual coupling where antenna sys-tem external noises as well as low-noise amplifier internal noises are observed. Thermal noise changes in multichannel receiving system with mutual channel coupling leads to their spatial correlation. For noise matching in receiving system channels load impedances are optimized by numerical Nelder-Mead method according to the criterion of minimum noise variance. The aim of the article is to increase the efficiency of signal processing in the presence of spatially correlated noise in a coupled multichannel receiving system by optimizing load impedances. The research of noise angular power spectra in a coupled multichannel receiving system for various configurations of a receiving system is carried out. The optimization of load impedances is shown to be capable to reduce the power of spatially correlated noise
Key words: mutual coupling, scaling method, multichannel receiving system, load impedances match-ing, space-correlated noises, angular power spectrum.