Investigation of a joint I/Q demodulation/pulse compression scheme for radar applications

2017 ◽  
Author(s):  
Hamza Bouhedjeur ◽  
Kamal Tourche ◽  
Ali Abbadi ◽  
Med Laid Bencheikh ◽  
Boualem Magaz
Keyword(s):  
Pulse Compression ◽  
Compression Scheme ◽  
Radar Applications

scholarly journals Generation of sub-two-cycle CEP-stable optical pulses at 3.5 μm by multiple-plate pulse compression for high-harmonic generation in crystals

2019 ◽  
Vol 205 ◽  
pp. 01006
Author(s):  
Xia Peiyu ◽  
Lu Faming ◽  
Ishii Nobuhisa ◽  
Kanai Teruto ◽  
Itatani Jiro
Keyword(s):  
Harmonic Generation ◽  
Pulse Compression ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
Optical Pulses ◽  
Compression Scheme ◽  
Mid Infrared

Multiple-plate pulse compression of femtosecond mid-infrared pulses is demonstrated using YAG and Si windows. With this robust compression scheme, we produce sub-two-cycle, CEP-stable optical pulses and observe CEP-dependent high harmonic generation in crystals.

Possibility of X-ray pulse compression using an asymmetric or inclined double-crystal monochromator

2013 ◽  
Vol 20 (4) ◽  
pp. 550-554 ◽  
Author(s):  
Jaromir Hrdý ◽  
Peter Oberta
Keyword(s):  
Laser Pulse ◽  
Free Electron ◽  
Free Electron Laser ◽  
Pulse Compression ◽  
Compact Scheme ◽  
Mutual Distance ◽  
Compression Scheme ◽  
Double Crystal ◽  
X Ray ◽  
Double Crystal Monochromator

It is shown theoretically that the asymmetric or inclined double-crystal X-ray monochromator may be used for X-ray pulse compression if the pulse is properly chirped. By adjusting the mutual distance of the two asymmetric or inclined crystals it should be possible to achieve even a sub-femtosecond compression of a chirped free-electron laser pulse. The smalld-spacing of the crystal enables a more compact scheme compared with the currently used grating compression scheme. The asymmetric cut of the crystal enables the acceptance of a larger bandwidth. The inclined cut has larger tunability.

Computer simulation for an ultra-low range sidelobe pulse compression scheme

1998 ◽  
Vol 15 (2) ◽  
pp. 116-124
Author(s):  
Guangzheng Yang ◽  
Xiangyu Yang ◽  
Lijuan Xu
Keyword(s):  
Computer Simulation ◽  
Pulse Compression ◽  
Compression Scheme

scholarly journals 1280-MHz Active Array Radar Wind Profiler for Lower Atmosphere: System Description and Data Validation

2012 ◽  
Vol 29 (10) ◽  
pp. 1455-1470 ◽  
Author(s):  
P. Srinivasulu ◽  
P. Yasodha ◽  
P. Kamaraj ◽  
T. N. Rao ◽  
A. Jayaraman ◽  
...  
Keyword(s):  
Pulse Compression ◽  
Signal To Noise Ratio ◽  
Beam Steering ◽  
Intermediate Frequency ◽  
Lower Atmosphere ◽  
Beam Forming ◽  
Wind Profiler ◽  
Compression Scheme ◽  
System Description ◽  
Peak Output Power

Abstract An L-band radar wind profiler was established at National Atmospheric Research Laboratory, Gadanki, India (13.5°N, 79.2°E), to provide continuous high-resolution wind measurements in the lower atmosphere. This system utilizes a fully active array and passive beam-forming network. It operates at 1280 MHz with peak output power of 1.2 kW. The active array comprises a 16 × 16 array of microstrip patch antenna elements fed by dedicated solid-state transceiver modules. A 2D modified Butler beam-forming network is employed to feed the active array. The combination of active array and passive beam-forming network results in enhanced signal-to-noise ratio and simple beam steering. This system also comprises a direct intermediate frequency (IF) digital receiver and pulse compression scheme, which result in more flexibility and enhanced height coverage. The scientific objectives of this profiler are to study the atmospheric boundary layer dynamics and precipitation. Observations made by this profiler have been validated using a collocated GPS sonde. This paper presents the detailed system description, including sample observations for clear-air and precipitation cases.

scholarly journals Parallel implementation of pulse compression method on a multi-core digital signal processor

2020 ◽  
Vol 10 (6) ◽  
pp. 6541
Author(s):  
Abdessamad Klilou ◽  
Assia Arsalane
Keyword(s):  
Real Time ◽  
Digital Signal Processor ◽  
Pulse Compression ◽  
Parallel Implementation ◽  
Digital Signal ◽  
Compression Algorithm ◽  
Software Interface ◽  
Processing Power ◽  
Radar Applications ◽  
Signal Processor

Pulse compression algorithm is widely used in radar applications. It requires a huge processing power in order to be executed in real time. Therefore, its processing must be distributed along multiple processing units. The present paper proposes a real time platform based on the multi-core digital signal processor (DSP) C6678 from Texas Instruments (TI). The objective of this paper is the optimization of the parallel implementation of pulse compression algorithm over the eight cores of the C6678 DSP. Two parallelization approaches were implemented. The first approach is based on the open multi processing (OpenMP) programming interface, which is a software interface that helps to execute different sections of a program on a multi core processor. The second approach is an optimized method that we have proposed in order to distribute the processing and to synchronize the eight cores of the C6678 DSP. The proposed method gives the best performance. Indeed, a parallel efficiency of 94% was obtained when the eight cores were activated.

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