An ultra-wideband 6–14 GHz frequency modulated continuous wave primary radar with 3 cm range resolution

Drechsel, Tom; Joram, Niko; Ellinger, Frank

doi:10.1016/j.vlsi.2020.05.008

Cited by 2 publications

(5 citation statements)

References 16 publications

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“…We also review the proximity sensors using IR (light? ), ultrasound, and electromagnetic waves [2,15,29,32,[37][38][39]. First, we consider the principle of distance measurement using optical sensors.…”

Section: Related Workmentioning

confidence: 99%

“…Another type of sensor commonly used for distance measurement is radar, which uses radio waves. The main advantages of the radar sensor are its high accuracy, contactless nature, and rapid response [39]. However, radar-level sensors have a high cost, and the cost increases exponentially with the accuracy.…”

Section: Related Workmentioning

confidence: 99%

“…Drechsel et al described the design and verification of a 6-14 GHz ultrawide frequency-modulated primary radar system with a very high band resolution [39]. The radar system used by the authors has a hybrid structure.…”

Section: Related Workmentioning

confidence: 99%

See 2 more Smart Citations

Improved accuracy of optical distance sensor based on artificial neural network applied to real-time systems

Bui¹,

Nguyen²,

Vu³

et al. 2022

Meas. Sci. Technol.

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Optical time of flight (ToF) sensors has potentials in the revolution of distance measurement. These sensors can continously monitor the distance and track the object movement. However, the existed sensing methods for such distance optical sensors mainly calculate the flight time e.g., pulse transit and receive time without considering theenvironment effects. Therefore, the measurement accuracy is severely reduced. There areother technologies with higher accuracy in the distance measurement. Nonetheless, they are too expensive due to the high accurate power supply. In this paper, we innovatievely improve the accuracy in continous distance measurement using the artificial neural network (ANN) technique. The proposed method can be applied for very cheap optical distance sensors with analog output in a real-time system.. Moreover, the propose method can self-calibrate and be miniaturized for such cheap analog sensor applications. The prototype is built with the infrared sensor GP2Y0A02YK0F and Arduino control board (add the name of Adruino board), the ANN is implemented using the deep learning algorithm. The test results show that the distance measurement accurary is significantly improved and the measuring range is increased from 15 to 150 cm. Also, we calculate MSE, MAE, MBE, and R2 for further perfomance evaluation. The experimental results have proved the superior of the proposed ANN method in optical distance measurement. The proposed method can be applied for many types of sensors

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

See 1 more Smart Citation

Improved accuracy of optical distance sensor based on artificial neural network applied to real-time systems

Bui¹,

Nguyen²,

Vu³

et al. 2022

Meas. Sci. Technol.

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show abstract

“…So far, various elaborately-designed FMCW Lidars have been proposed [8][9][10][11][12][13][14][15][16][17][18][19][20]. In order to achieve high-accuracy measurement, a FMCW signal with excellent linearity is required as the emitted source of the Lidar.…”

Section: Introductionmentioning

confidence: 99%

“…The ranging resolution, as a key indicator for a Lidar system, has been widely discussed in the literature [8][9][10][11][12][13][14][15][16][17][18][19][20]. Based on the relationship of R = cT f /2B (c, T, B and f are the velocity of light, modulation period, chirp bandwidth and the frequency of de-chirped signal, respectively), the ranging resolution (∆R) is considered as ∆R = cT∆ f /2B, where ∆ f is the minimum frequency difference that can be distinguished.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Ranging Resolution of a FMCW Lidar

Xiao

Jiang

et al. 2021

Photonics

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In some previous reports about frequency-modulated continuous-wave (FMCW) Lidar, observing the longer waveform of a de-chirped signal is considered an effective scheme for further improving the ranging resolution. In this work, the ranging resolution of a FMCW Lidar is experimentally investigated, and the feasibility of such a scheme is tested. During the experiment, a FMCW signal is generated via a Mach–Zehnder modulator in the transmitted port. In the received port, the de-chirped signal is extracted based on a homodyne detection scheme and is analyzed by an electrical spectrum analyzer. Two different methods are adopted to determine the ranging resolution. One is based on a single target, for which the ranging resolution is obtained through inspecting the shift of spectral peak position as the target moves. The other is based on two targets, for which the ranging resolution is acquired through inspecting the variation of spectrum distribution as the spacing of two targets changes. The experimental results demonstrate that extending the observed duration of the de-chirped signal cannot improve the ranging resolution, and the corresponding physical mechanism is revealed.

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An ultra-wideband 6–14 GHz frequency modulated continuous wave primary radar with 3 cm range resolution

Cited by 2 publications

References 16 publications

Improved accuracy of optical distance sensor based on artificial neural network applied to real-time systems

Improved accuracy of optical distance sensor based on artificial neural network applied to real-time systems

Experimental Investigation on the Ranging Resolution of a FMCW Lidar

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