Development of digital RF memory based target echo simulator for Doppler RADARS

Chakravarti, Madhumita; Daggula, Rajender

doi:10.1109/aemc.2009.5430576

Cited by 9 publications

(5 citation statements)

References 1 publication

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“…The range simulation is performed by delaying the radar‐transmitted RF signal proportional to the range

\tau =2\ast R\unicode{x02215}c

, 2 where traditional options include Acousto‐Optic variable delay line, 3 fiber optical delay line, 4 coaxial delay line, 5 Surface Acoustic Wave delay lines, 6 DRFM techniques, 7 and so forth. In the Acousto‐Optic delay line, an RF‐input signal is converted to an acoustic wave using a transducer, and it is sent through an Acousto‐Optic interaction medium 3 .…”

Section: Introductionmentioning

confidence: 99%

High‐speed, high‐resolution methodology for portable universal radar target‐echo simulator

Daggula

Bevara

Kamal³

et al. 2022

Micro & Optical Tech Letters

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In this paper, digital parallelization and fractional delay-based novel methods are proposed for the realization of high bandwidth, high-resolution Ku-band radar target simulator with 2.5 GHz intermediate frequency. High bandwidth waveform from radar is sampled by high-speed Analog to Digital Converter, and samples are parallelized in Field Programmable Gate Array (FPGA) to work at the nominal clock frequency. In Digital RF Memory-based target simulator, for finer range resolution, the FPGA clock frequency needs to be increased, which leads to increased system design complexity. The finer range resolution is accomplished without altering the system clock frequency using variable fractional delay filters and the digital parallelization methodology is proposed in this paper. The maximum target range that can be simulated is 20 km. As a result, memory requirements, computational complexity, and power dissipation are reduced. Finally, simulation and implementation results are presented.

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“…The range simulation is performed by delaying the radar‐transmitted RF signal proportional to the range

\tau =2\ast R\unicode{x02215}c

Section: Introductionmentioning

confidence: 99%

High‐speed, high‐resolution methodology for portable universal radar target‐echo simulator

Daggula

Bevara

Kamal³

et al. 2022

Micro & Optical Tech Letters

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“…Compared with analog simulator, digital simulator is more flexible and easy to be generalized. Based on digital radio-frequency memory (DRFM) technique, in [3] the authors presented a RF target echo simulator, which picks up the RF signal from the radar transmitter and modulates the signal as required. In [4] a stepped frequency echo simulator was realized by employing direct digital synthesizer (DDS) and FPGA, which greatly simplified the task of programming and thus shortened the development time accordingly.…”

Section: Introductionmentioning

confidence: 99%

Radar echo simulation capability incorporated into signal processor

Hong

Jiang

et al. 2013

IET International Radar Conference 2013

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Time and costs are of great concern for designing a simulator. It's not always wise to introduce an extra simulator to debug and test a signal processing system. In this paper, considering the characteristics of the signal processor, we propose a novel method of incorporating radar echo simulation capability into the signal processor with no extra hardware resource needed. Detailed mathematical modelling of the exact radar echo is first presented. Then the design of echo simulation function is elaborated. Taking into account the very short development time, the experimental results are very satisfying.

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“…The simulative target generator picks up radar transmitting signals and re-transmits them with variable parameters to the radar. The major parameters of the radar signals, such as the apparent range, velocity, and atmospheric attenuation, are adjusted [4]～ [6]. The generator can normally simulate a point air target as well as clutter and jamming signals.…”

Section: ⅰ Introductionmentioning

confidence: 99%

Development of Frequency Discriminated Simulative Target Generator Based on DRFM for Radar System Performance Evaluation

Chung¹,

Kim²,

Bae³

et al. 2011

Journal of electromagnetic engineering and science

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Simulative target generators are needed for testing and calibrating various radar systems. The generator in this study discriminates the transmitting frequency from a radar and simulates parameters like target range, range rate, and atmospheric attenuation using the digital RF memory technique. The simulative target echo is then sent to the radar for testing and evaluation. This paper proposes a novel architecture for controlling the digital RF memory so it continually writes ADC data to the memory and reads it for the DAC with increasing one step address in order to control the delay of target range in a simple way. The target echo is programmed according to various preprogrammed scenarios and is generated in real time using a wireless local area network (LAN). To analyze the detected and generated target information easily, the system times for the radar and simulative target generator are synchronized using a global positioning system (GPS).

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Development of digital RF memory based target echo simulator for Doppler RADARS

Cited by 9 publications

References 1 publication

High‐speed, high‐resolution methodology for portable universal radar target‐echo simulator

High‐speed, high‐resolution methodology for portable universal radar target‐echo simulator

Radar echo simulation capability incorporated into signal processor

Development of Frequency Discriminated Simulative Target Generator Based on DRFM for Radar System Performance Evaluation

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