P.V. Shtro1, P.V. Leferchick2, A. Yu. Shershunovich3, E.A. Kriger4

1-4 JSC “Scientific and Production Enterprise “Radiosvyaz” (Krasnoyarsk, Russia)

1 shtro_pv@krtz.su; 2 lpv@krtz.su; 3 shershunovich_au@krtz.su; 4 dsp@krtz.su

Problem statement. Digital receiving antenna arrays (DRAA) are a widely used technology in the field of consumer navigation equipment (CNE). The integration of adaptive DAA and CNE facilitates the resolution of navigation challenges in complex interference environments. This is due to the ability of DAA to address the issue of auto-compensation of spatially spaced interference. The effectiveness of wide-band interference suppression is significantly affected by the uneven amplitude-frequency characteristics (frequency response) of the DAA radio receiving paths. One potential solution to this issue is to implement fixed equalizers in each of the receiving paths of the DAA. These equalizers are sophisticated filters with finite impulse response (FIR).

Goal. This paper describes such equalizers, the weight coefficients of which are calculated using an adaptive algorithm based on the least Mean Square criterion (LMS) and a recursive algorithm based on the least Squares criterion (RLS). Furthermore, the methodology for calibrating the CAR using equalizers is presented, as well as the calibration results on a prototype interference compensator. The equalization of the frequency characteristics of the receiving paths of the CAR is realized by using adaptive filters that perform the functions of equalizers at the calibration stage of the DAA and later during its operation.

Shtro P.V., Luferchick P.V., Shershunovich A.Yu., Kriger E.A. The equalization of frequency characteristics of digital antenna arrays is to be achieved using adaptive filters. Radiotekhnika. 2025. V. 89. № 12. P. 62−67. DOI: https://doi.org/10.18127/j00338486-202512-07 (In Russian)

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