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Известия высших учебных заведений России. Радиоэлектроника

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Improving the Structure of a Signal Used for Real-Time Calibrating of the Receiving Channels of Digital Transceiver Modules in Digital Phased Antenna Arrays

https://doi.org/10.32603/1993-8985-2021-24-4-19-26

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Аннотация

Introduction. Modern digital phased array antenna (DPAA) systems incorporate a large number of identical transceiver modules (TMs). These modules require real-time calibration with a high level of accuracy. In a previous work, we proposed a real-time calibration method for all receiver channels, which is based on the use of a calibration signal (CalSig) of the same frequency spectrum as the reflected signal and modulated in phase and amplitude by BPSK and OOK codes, respectively. This method was found to have a number of advantages over conventional approaches. However, the use of the same CalSig sample for all receiving channels increases the noise power gain at the output of a digital beam-forming unit (DBU). To overcome this limitation, we set out to improve the structure of CalSigs by making them pseudo-orthogonal. As a result, the noise power gain at the DBU output can be significantly reduced compared to that obtained in our previous work.
Aim. To propose an improved design of a controlled amplitude modulation code OOK generator, which allows creation of pseudo-orthogonal CalSigs. As a result, the noise power gain at the output will increase insignificantly, thus having no negative effect on the quality of digital beam forming, signal processing and calibration.
Materials and methods. Theory of system engineering and technology; theory of digital signal processing; system analysis; mathematical modeling.
Results. An improved CalSig for calibrating the receiving channels of TMs was obtained. A structural diagram allowing the formation of pseudo-orthogonal CalSigs was synthesized.
Conclusions. We proposed a new approach to improving the structure of signals used for real-time calibrating the DPAA receiving channels. A structural diagram of an amplitude-modulated OOK code generator for pseudo-orthogonal CalSigs was developed.

Об авторах

Hung Tran Viet
Le Quy Don Technical University
Вьетнам

Viet Hung Tran, an Engineer specializing in Radar Systems, 2010, defended a Master's thesis in System Engineering and Control Automation, 2016. A specialist in systems engineering, radio-electronic and radar technology.

236 Hoang Quoc Viet St., Hanoi



Thien Hoang Minh
Le Quy Don Technical University
Вьетнам

Minh Thien Hoang, an Engineer specializing in Radar Systems, 2005; defended a Master's thesis in Systems Engineering and Control Automation, 2008; defended a doctoral dissertation in the specialty Microelectronic Technology at TU Electronics and Communication Tokyo, (2015).

236 Hoang Quoc Viet St., Hanoi



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Рецензия

Для цитирования:


Viet H.T., Minh T.H. Improving the Structure of a Signal Used for Real-Time Calibrating of the Receiving Channels of Digital Transceiver Modules in Digital Phased Antenna Arrays. Известия высших учебных заведений России. Радиоэлектроника. 2021;24(4):19-26. https://doi.org/10.32603/1993-8985-2021-24-4-19-26

For citation:


Viet H.T., Minh T.H. Improving the Structure of a Signal Used for Real-Time Calibrating of the Receiving Channels of Digital Transceiver Modules in Digital Phased Antenna Arrays. Journal of the Russian Universities. Radioelectronics. 2021;24(4):19-26. https://doi.org/10.32603/1993-8985-2021-24-4-19-26

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ISSN 1993-8985 (Print)
ISSN 2658-4794 (Online)