Joint radio frequency front-end and digital back-end antijamming scheme based on a metasurface antenna array

• Published in: Frontiers of information technology & electronic engineering Vol. 24; no. 12; pp. 1739 - 1751
• Main Authors: Lou, Yangming, Jin, Liang, Jiang, Wenyu, Xiao, Shuaifang
• Format: Journal Article
• Language: English
• Published: Hangzhou Zhejiang University Press 01-12-2023; Springer Nature B.V
• Subjects: Analog to digital converters; Antenna arrays; Antennas; Bit error rate; Communications Engineering; Computer Hardware; Computer Science; Computer Systems Organization and Communication Networks; Degrees of freedom; Digital signal processing; Electrical Engineering; Electronics and Microelectronics; Independent component analysis; Instrumentation; Jamming performance; Metasurfaces; Networks; Radio frequency; Research Article; Signal processing; 多输入多输出; Antijamming; TN973.3; 超表面天线阵列; Multiple-input multiple-output; Independent component analysis; 抗干扰; Metasurface antenna array; 独立成分分析
• ISSN: 2095-9184; 2095-9230
• DOI: 10.1631/FITEE.2300113

An array’s degree of freedom (DoF) determines the number of jamming incidents that can be managed and the antijamming performance. Conventional arrays can improve the DoF only by increasing the number of antennas. On the other hand, when the received signal is digitized, high-power jamming will reduce the number of bits used to represent the desired signal, further increasing the difficulty of back-end antijamming based on digital signal processing. In this paper, we propose a joint radio frequency (RF) front-end and digital back-end antijamming scheme based on a metasurface antenna array. The metasurface antennas can rapidly switch patterns when receiving signals, so that a single channel can be equivalent to multiple channels and increase the DoF. We use independent component analysis to estimate the channel and then optimize the array parameters under the minimum signal-to-jamming ratio constraint of each antenna. The proposed scheme works well under high-power jamming conditions by suppressing jamming at the RF front end and using a low-precision analog-to-digital converter. Simulation results show that the proposed scheme reduces the bit error rate of the received signals by one order of magnitude compared with the conventional array.