Presenting a New Model of Optimal Coordinated beam former Vector Selection in DRFM for Radar Jamming

Majlesi Journal of Telecommunication Devices

مقاله 4، دوره 12، شماره 3، آذر 2023، صفحه 141-147   

نوع مقاله: Reseach Article

شناسه دیجیتال (DOI): 10.30486/mjtd.2023.1986716.1034

نویسندگان

Hasan Mohammadi¹؛ khodadad Halili²؛ Vahidreza Soltaninia³؛ Meysam Bayat⁴؛ Saeed Talati^{* 1}

¹Shahid Sattari University of Aeronautical Engineering, Tehran, Iran.

²Assistant Professor, Shahid Sattari University of Aeronautical Engineering, Tehran, Iran.

³Department of Electronic Warfare, Faculty of Electronic warfare Engineering, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran

⁴Assistant Professor of Communications, Shahid Sattari University of Aeronautical Engineering, Tehran, Iran.

چکیده

Digital Radio Frequency Memory (DRFM) is a technique that uses high-speed sampling and digital memory to store radio frequency and microwave signals. DRFM is a popular technique for implementing false-target ECM systems. DRFM is a technique that stores and reproduces radio frequency (RF) and microwave signals. Input an RF signal that has been converted to a frequency sufficient for sampling by a high-speed A/D converter (ADC). The sampled signal is stored in a high-speed memory and can be retrieved and converted to the original signal using a D/A converter (DAC).
In this article, the principles and architecture of DRFM have been reviewed and to improve the performance of this system, the method of interference matching has been proposed using a coordinated beam shaper to improve the performance of this system in creating interference. This article, it is presented to evaluate the proposed method in improving the interference values and BER in the method based on the improvement of the coordinated beam former. For this purpose, a DRFM was considered for disruption. Then the proposed method was implemented with the help of signal processing and in MATLAB software on this DRFM. In the proposed method, an objective function is considered by considering the increase in the number of objectives in proportion to the fulfillment of the acceptable rate. Based on this objective function, the amount of interference and BER has been reduced. The effect of increasing targets on interference and BER has been investigated in evaluating the proposed method. For this purpose, the SINR value was changed, and based on the change of the SINR value and the change in the number of targets, the evaluation was done. The obtained results show that with the increase in the number of targets, the amount of interference and also the amount of BER have increased. The increase in the number of targets in the proposed optimal and quasi-optimal coordinated beam former method with the increase in the number of targets is much less than that of the coordinated beam former. It is also the reason for this superiority. Also, the desired optimization function in the stated situations has caused this importance to be taken into account. The proposed method has been evaluated in terms of bit error rate and interference. The evaluation results show a reduction in bit error rate up to 6%, and interference up to 5% compared to the coordinated beam former as the number of targets increases.

کلیدواژه‌ها

DRFM؛ Digital Signal Processing؛ Frequency Domain؛ Coherent Beam former

مراجع

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