A.S. Podstrigaev1, I.A. Astafyev2

1,2 JSC “Scientific-Research Institute “Vektor” (St. Petersburg, Russia)

1,2 Saint-Petersburg State Electrotechnical University “LETI” (Saint-Petersburg, Russia)

1 ap0d@ya.ru; 2 astaphev.ivan@gmail.com

This article analyzes the structural diagram of a typical RF spectrum management complex (RF SMC), which includes a radio technical review system (RTRS) and a phase direction finding system (PDFS). A feature of this complex is the use of different receivers in the RTRS and PDF, since these systems solve different problems, therefore, the receivers are subject to largely contradictory requirements. This feature complicates the development, manufacture, debugging and repair of the complex, and accordingly, increases the costs of its creation and operation. To solve this problem, it is proposed to use a multichannel Sub-Nyquist receiver (MSNR) both in the RTRS and PDFS, due to the possibility of software configuration of its parameters. This solution also allows to increase the unification of the RF SMC components.

Therefore, the purpose of this work is to develop modification options for the RF SMC based on the MSNR common to the RTRS and PDFS, to perform a comparative analysis of the proposed RF SMC options and to substantiate recommendations for the use of the proposed RF SMC options.

To achieve this goal, a detailed analysis of a typical RF SMC was performed. Its structural diagram, operating algorithm, operating modes, direction finding algorithm, appearance and organization of the antenna system were described. Then, 4 variants of the RF SMC modification were presented: with separate RTRS and PDFS and without directional search, with separate RTRS and PDFS and with directional search, with combined RTRS and PDFS and without directional search, with combined RTRS and PDFS and with directional search. Then, a comparative analysis of the typical and proposed 4 variants of the RF SMC modernization was performed, where the number of switches, the number of receivers, the operating algorithm, and the direction finding algorithm were compared. Also, the following indicators were used to perform a comparative analysis of the proposed RF SMC variants: unification coefficient, reduction in hardware cost, cost savings coefficient, probability of system failure, probability of missing a single signal, losses in switches, system noise factor, sensitivity.

After the comparative analysis, general recommendations were given for the use of the proposed RF SMC options. These recommendations were justified by the requirements for signal analysis, weight, size and cost constraints.

Podstrigaev A.S., Astafyev I.A. Signal detection based on sub-Nyquist sampling technology without directional and frequency search. Radiotekhnika. 2025. V. 89. № 9. P. 103−112. DOI: https://doi.org/10.18127/j00338486-202509-11 (In Russian)

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