High-precision Direction Finding Based on Time Modulation Array with Single Radio Frequency Channel and Composite Baselines

LIN Yulong; WANG Wuji; WU Junwei; CHENG Qiang

doi:10.11999/JEIT231137

Volume 46 Issue 5

May 2024

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Article Navigation > Journal of Electronics & Information Technology > 2024 > 46(5): 2028-2035

LIN Yulong, WANG Wuji, WU Junwei, CHENG Qiang. High-precision Direction Finding Based on Time Modulation Array with Single Radio Frequency Channel and Composite Baselines[J]. Journal of Electronics & Information Technology, 2024, 46(5): 2028-2035. doi: 10.11999/JEIT231137

Citation:

LIN Yulong, WANG Wuji, WU Junwei, CHENG Qiang. High-precision Direction Finding Based on Time Modulation Array with Single Radio Frequency Channel and Composite Baselines[J]. Journal of Electronics & Information Technology, 2024, 46(5): 2028-2035. doi: 10.11999/JEIT231137

Citation:

LIN Yulong, WANG Wuji, WU Junwei, CHENG Qiang. High-precision Direction Finding Based on Time Modulation Array with Single Radio Frequency Channel and Composite Baselines[J]. Journal of Electronics & Information Technology, 2024, 46(5): 2028-2035. doi: 10.11999/JEIT231137

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High-precision Direction Finding Based on Time Modulation Array with Single Radio Frequency Channel and Composite Baselines

doi: 10.11999/JEIT231137

LIN Yulong^{1, 2},
WANG Wuji^{1, 2},
WU Junwei^{1, 2, 3, 4
,
,},
CHENG Qiang^{1, 2}

1.
Institute of Electromagnetic Space, Southeast University, Nanjing 210096, China
2.
State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China
3.
Peng Cheng Laboratory, Shenzhen 518055, China
4.
Pazhou Laboratory (Huangpu), Guangzhou 510555, China

Funds: The National Key Research and Development Program of China (2021YFA1401002), The National Natural Science Foundation of China (62171124, 62288101, 62225108), The Major Key Project of Peng Cheng Laboratory (PCL2023AS1-2)

Received Date: 2023-10-18
Rev Recd Date: 2024-02-13

Available Online: 2024-03-06

Publish Date: 2024-05-30

Abstract

Abstract

With the rapid developments of positioning systems, high-precision and low-cost direction-finding technologies are urgently needed. The hardware complexity and economic cost of traditional direction-finding methods have hindered their wide applications. Recently, direction finding based on Time-Modulated Arrays (TMAs) has overcome the shortcomings of traditional direction-finding methods. Nevertheless, to ensure measurement accuracy, one has to keep an adequate number of array elements in common TMAs. Consequently, a question arises, i.e., is it possible to reduce the number of array elements in TMAs, thus making the hardware complexity as low as possible? A novel direction-finding method based on the TMA with a single radio frequency channel and composite baselines is proposed in this paper. In the method, four antennas are meticulously arranged at specific intervals to form double-long baselines, and accurate and low-cost direction finding is realized with the ingenious usage of Field Programmable Gate Array (FPGA) and single receiving channel. To verify the effectiveness of the method, a prototype system in the S band is designed, fabricated, and measured. Detailed comparisons with the existing methods are provided. The work will benefit the development and application of high-precision and low-cost direction-finding systems.
- Direction finding,
- Spectrum harmonic analysis,
- Time-modulated array,
- Antenna array

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References(20)

References

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