A Doppler Range Compensation for Step-Frequency Continuous-Wave Radar for Detecting Small UAV

Pieraccini, Massimiliano; Miccinesi, Lapo; Rojhani, Neda

doi:10.3390/s19061331

Cited by 13 publications

(8 citation statements)

References 16 publications

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“…The GPR is moving with a speed v toward the interferometric radar. Generally speaking, a radar is affected by the Doppler effect, and it may not be able to retrieve the correct GPR position just by detecting the position of the peak in range [10,11].…”

Section: Methodsmentioning

confidence: 99%

“…Electronics 2021, 10, 2799 2 of 9 effect, and it may not be able to retrieve the correct GPR position just by detecting the position of the peak in range [10,11]. In order to evaluate how much the Doppler affects the interferometric radar positioning, we consider a radar providing a continuous wave stepped frequency signal, as shown in Figure 2.…”

Section: Methodsmentioning

confidence: 99%

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Microwave Interferometric System for GPR Positioning

2021

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Ground penetrating radar (GPR) systems are sensors that are able to acquire underground images by scanning the surface of the soil/pavement under investigation. Usually, a GPR system records its own position along the scan line, using a mechanical odometer, i.e., a rolling wheel in contact with the ground. This simple and cheap solution can be ineffective on uneven terrains. In this paper, a positioning system based on an interferometric radar is presented. This kind of radar is able to detect small displacements of the targets in its field of view. Such a capability was used to track the GPR position along a line. The system was validated with simulations and tested in a realistic experimental scenario.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Microwave Interferometric System for GPR Positioning

2021

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“…where β 0 represents the channel power at the reference distance 1 m. Besides, the Doppler effect induced by the UAV mobility is assumed to be well compensated at the communication users [26], [41] and the sensing receiver [42], [43], respectively. The transmit array response vector of the UAV toward user k's location u k is…”

Section: B Communication and Sensing Modelmentioning

confidence: 99%

Throughput Maximization for UAV-enabled Integrated Periodic Sensing and Communication

Meng,

Wu,

et al. 2022

Preprint

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Driven by unmanned aerial vehicle (UAV)'s advantages of flexible observation and enhanced communication capability, it is expected to revolutionize the existing integrated sensing and communication (ISAC) system and promise a more flexible joint design. Nevertheless, the existing works on ISAC mainly focus on exploring the performance of both functionalities simultaneously during the entire considered period, which may ignore the practical asymmetric sensing and communication requirements.In particular, always forcing sensing along with communication may make it is harder to balance between these two functionalities due to shared spectrum resources and limited transmit power. To address this issue, we propose a new integrated periodic sensing and communication (IPSAC) mechanism for the UAV-enabled ISAC system to provide a more flexible trade-off between two integrated functionalities. Specifically, the system achievable rate is maximized via jointly optimizing UAV trajectory, user association, target sensing selection, and transmit beamforming, while meeting the sensing frequency and beam pattern gain requirement for the given targets. Despite that this problem is highly non-convex and involves closely coupled integer variables, we derive the closed-form optimal beamforming vector to dramatically reduce the complexity of beamforming design, and present a tight lower bound of the achievable rate to facilitate UAV trajectory design. Based on the above results, we propose a two-layer penalty-based algorithm to efficiently solve the considered problem. To draw more important insights, the optimal achievable rate and the optimal UAV location are analyzed under a special case of infinity number of antennas. Furthermore, we prove the structural symmetry between the optimal solutions in different ISAC frames without location constraints in our considered UAV-enabled ISAC system. Based on this, we propose an efficient algorithm for solving the problem with location constraints. Numerical results validate the effectiveness of our proposed designs and also unveil a more flexible trade-off in ISAC systems over benchmark schemes.

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“…Different frequencies of complex exponential functions are orthogonal to each other. The target echoes are linearly independent of the reference signal due to the Doppler shift, provided the Doppler shift is non-zero and the signals are monitored over a long enough time period [9], [10].…”

Section: Reflecto Dipol Directormentioning

confidence: 99%

Design of a Passive Radar based on RTL-SDR technology with coherent dual channel

Mediavilla

Espinoza

Espinosa

et al. 2022

J. Phys.: Conf. Ser.

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In this research, a passive radar aimed at the detection of unmanned aerial vehicles was developed. As a UAV navigates at low altitudes and high speeds, RTL-SDR modules are used that with the help of two antennas, one directional and one reference, the position of the object is detected through bounce and signal discrimination, for which several tests were carried out in based on frequencies that are in the FM range. For this, GNU radio is used and data processing with Python in the Anaconda guide that facilitates obtaining data visually through a video of the frequency of the Doppler effect vs the distance in kilometers. Also, mention is made of the synchronization arrangement that is established between the RTL-SDR modules based on their oscillator.

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A Doppler Range Compensation for Step-Frequency Continuous-Wave Radar for Detecting Small UAV

Cited by 13 publications

References 16 publications

Microwave Interferometric System for GPR Positioning

Microwave Interferometric System for GPR Positioning

Throughput Maximization for UAV-enabled Integrated Periodic Sensing and Communication

Design of a Passive Radar based on RTL-SDR technology with coherent dual channel

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