A New Method to Deploy and Control the Distributed Jamming against Phased-Array Radar

2013 ◽  
Vol 416-417 ◽  
pp. 817-821
Author(s):  
Xin Yu Wang ◽  
Jun He ◽  
Zhen Biao Hu ◽  
Kai Wang

Reasonable deployment and effective control can help the distributed jammers to function better. According to the counter-jamming theory of PAR, a new method is presented to deploy the distributed jammers which can provide the azimuth and distance of each jammer to enhance its jamming effects. After the jammers are located, computers are adopted to control the distributed jammers which should be turned on/off properly for suitable duration. The target detection probability under jamming condition is selected to evaluate the jamming effects, and the experiment results show that this method has steady jamming effects against PAR.

2013 ◽  
Vol 2013 ◽  
pp. 1-16 ◽  
Author(s):  
Xiaobin Qiu ◽  
Qin Xu ◽  
Chongjian Qiu ◽  
Kang Nai ◽  
Pengfei Zhang

The previous two-dimensional simple adjoint method for retrieving horizontal wind field from a time sequence of single-Doppler scans of reflectivity and/or radial velocity is further developed into a new method to retrieve both horizontal and vertical winds at high temporal and spatial resolutions. This new method performs two steps. First, the horizontal wind field is retrieved on the conical surface at each tilt (elevation angle) of radar scan. Second, the vertical velocity field is retrieved in a vertical cross-section along the radar beam with the horizontal velocity given from the first step. The method is applied to phased array radar (PAR) rapid scans of the storm winds and reflectivity in a strong microburst event and is shown to be able to retrieve the three-dimensional wind field around a targeted downdraft within the storm that subsequently produced a damaging microburst. The method is computationally very efficient and can be used for real-time applications with PAR rapid scans.


2017 ◽  
Vol 55 (10) ◽  
pp. 5899-5912 ◽  
Author(s):  
Mark E. Weber ◽  
John Y. N. Cho ◽  
Henry G. Thomas

Transmit/Receive (T/R) modules plays important role in advanced phased array radar system consists of array of antenna elements. In order to produce beam pattern for multiple radiating elements, the phase angle for each T/R module should be assigned with calculated value. When phase gradient is sent to T/R unit, phase values are calculated for array of elements associated with them. The paper presents a beam steering control system architecture consists of Graphical user interface, group controller with scalable T/R control unit (TRCU) having two hexa decagon T/R module controllers (HTRMCs) and control logic unit for parallel data flow. Calculation of 6 bit phase value from the phase gradient carried out using FPGA. Also, use of logic core and quantization of phase values are discussed. The paper also reports the area factor for the proposed architecture


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