Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1689-1719. 2020. No. 1
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DOI 10.30898/1684-1719.2020.1.2

UDC 621.396.677
 

Synthesis method of a linear virtual antenna array

 

L. V. Vinnik, V. I. Kolesnichenko, A. V. Litvinov, S. E. Mishchenko, V. V. Shatskij

Rostov science institute of radiocommunications, Nansena 130, Rostov-on-Don 344038, Russia

The paper is received on December 24, 2019

Abstract. To process the output signals of digital antenna arrays, superresolution methods are used, which include the virtual expansion method. The main limitation of this method is the requirements for the smoothness of the function describing the field distribution in the array of the receiving antenna. The aim of the work is to overcome this limitation. In this regard, a method of synthesis of a virtual linear antenna array is proposed. The virtual antenna array consists of two subarrays, the positions of the antenna elements of the first of which coincide with the coordinates of the antenna elements of the receiving digital antenna array. The antenna elements of the second subarray are virtual. The synthesis problem is carried out using the gradient fastest descent algorithm on the criterion of maximum relationship of the norm of the vector of complex amplitudes in the aperture of the virtual subarray to the norm of the deviations of the measured vector of complex amplitudes in channels digital antenna array from the calculated vector of complex amplitudes in the real subarray. It is shown that the proposed method allows to detect and resolve radio emission sources arbitrarily oriented in space. Studies have been carried out to confirm the efficiency of the method with a different number of channels of the receiving digital antenna array and reducing the signal-to-noise ratio to 1...2 dB.

Key words: virtual antenna array, digital antenna array, synthesis of antenna array.

References

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For citation:

Vinnik L.V., Kolesnichenko V.I., Litvinov A.V., Mishchenko S.E., Shatskij V.V. Synthesis method of a linear virtual antenna array. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2020. No. 1. Available at http://jre.cplire.ru/jre/jan20/2/text.pdf

DOI  10.30898/1684-1719.2020.1.2