scholarly journals Laser ranging using coherent pulse compression with frequency shifting loops

2019 ◽  
Vol 27 (9) ◽  
pp. 12000 ◽  
Author(s):  
Juan Clement ◽  
Côme Schnébelin ◽  
Hugues Guillet de Chatellus ◽  
Carlos R. Fernández-Pousa
Keyword(s):  
Pulse Compression ◽  
Laser Ranging ◽  
Coherent Pulse ◽  
Frequency Shifting

Laser ranging with analog all-optical coherent pulse compression using a frequency shifting loop

2021 ◽  
Author(s):  
Vincent Billault ◽  
Vicente Duran ◽  
Carlos R. Fernandez-Pousa ◽  
Vincent Crozatier ◽  
Hugues Guillet de Chatellus
Keyword(s):  
Pulse Compression ◽  
Laser Ranging ◽  
All Optical ◽  
Coherent Pulse ◽  
Frequency Shifting

Laser ranging with analog all-optical coherent pulse compression using a frequency shifting loop

2021 ◽  
Author(s):  
Vincent Billault ◽  
Vicente Durán ◽  
Carlos R. Fernandez-Pousa ◽  
Vincent Crozatier ◽  
Loïc Morvan ◽  
...  
Keyword(s):  
Pulse Compression ◽  
Laser Ranging ◽  
All Optical ◽  
Coherent Pulse ◽  
Frequency Shifting

scholarly journals All-optical coherent pulse compression for dynamic laser ranging using an acousto-optic dual comb

2021 ◽  
Author(s):  
Hughes Guillet de Chatellus ◽  
Vincent BILLAULT ◽  
Vincent Crozatier ◽  
Vicente Durán ◽  
Carlos Fernandez-Pousa ◽  
...  
Keyword(s):  
Pulse Compression ◽  
Laser Ranging ◽  
All Optical ◽  
Coherent Pulse

Laser ranging with analog all-optical coherent pulse compression

2019 ◽  
Author(s):  
Hugues Guillet de Chatellus ◽  
Vicente Duran-Bosch ◽  
Juan Clement ◽  
Carlos R. Fernandez-Pousa
Keyword(s):  
Pulse Compression ◽  
Laser Ranging ◽  
All Optical ◽  
Coherent Pulse

scholarly journals Coherent Pulse-Compression Lidar Based on 90-Degree Optical Hybrid

Sensors ◽  
2019 ◽  
Vol 19 (20) ◽  
pp. 4570 ◽  
Author(s):  
Jing Yang ◽  
Bin Zhao ◽  
Bo Liu
Keyword(s):  
Phase Difference ◽  
Amplitude Modulation ◽  
Detection Probability ◽  
Pulse Compression ◽  
Random Phase ◽  
Local Oscillator ◽  
Chirp Signal ◽  
Lidar System ◽  
Coherent Pulse

A coherent pulse-compression lidar system based on a 90-degree optical hybrid is demonstrated in this paper. In amplitude modulation (AM) mode, the returned RF chirp signal will be influenced by a random phase difference between local oscillator and echo light, causing fluctuations in the ranging results, and as a result the detection probability is small. By using the 90-degree optical hybrid, two orthogonal complementary signals are obtained to stabilize the result so as to increase the detection probability. We performed an experiment to measure the distance of a white printed wall which is about 65 m away from the system. The detection probability increased from 65% to 99.88%, and the precision is improved from 0.42 m to 0.27 m.

High-Resolution Low-Sidelobe Laser Ranging Based on Incoherent Pulse Compression

2012 ◽  
Vol 24 (23) ◽  
pp. 2119-2121 ◽  
Author(s):  
Daniel Kravitz ◽  
Daniel Grodensky ◽  
Nadav Levanon ◽  
Avi Zadok
Keyword(s):  
High Resolution ◽  
Pulse Compression ◽  
Laser Ranging ◽  
Low Sidelobe

scholarly journals Countering a Self-protection Frequency-shifting Jamming against LFM Pulse Compression Radars

2017 ◽  
Vol 63 (2) ◽  
pp. 145-150 ◽  
Author(s):  
S. Baher Safa Hanbali ◽  
Radwan Kastantin
Keyword(s):  
Pulse Compression ◽  
Radar Signal ◽  
True Target ◽  
Processing Gain ◽  
Before And After ◽  
A New Technique ◽  
Small Change ◽  
Pulse Compression Radar ◽  
Self Protection ◽  
Frequency Shifting

Abstract the well-known range-Doppler coupling property of the LFM (Linear Frequency Modulation) pulse compression radar makes it more vulnerable to repeater jammer that shifts radar signal in the frequency domain before retransmitting it back to the radar. The repeater jammer, in this case, benefits from the pulse compression processing gain of the radar receiver, and generates many false targets that appear before and after the true target. Therefore, the radar cannot distinguish between the true target and the false ones. In this paper, we present a new technique to counter frequency shifting repeater jammers. The proposed technique is based on introducing a small change in the sweep bandwidth of LFM waveform. The effectiveness of the proposed technique is justified by mathematical analysis and demonstrated by simulation.

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