Study on radar target imaging and velocity measurement simultaneously based on step frequency waveforms

Yuan, Haiwen; Zhang, Cheng; Shu-liang, Wen; Peng, Jun

doi:10.1109/apsar.2007.4418637

Cited by 7 publications

(4 citation statements)

References 1 publication

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“…With respect to other Doppler range compensation techniques [13,14] that require an implementation of special modulation patterns, this technique can be used with any SFCW radar. On the other hand, the main disadvantage is probably the possible deterioration of the corrected image, as mentioned before.…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, since 1999, Gill [12] correctly identified the range shift due to the Doppler effect in step-frequency radars without proposing a specific technique for correcting/compensating it. The standard approach for compensating the Doppler effect is to transmit a positive and a negative sweep in rapid succession [13]. The Doppler shift has an opposite effect in the two sweeps and so it can be removed.…”

Section: Introductionmentioning

confidence: 99%

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A Doppler Range Compensation for Step-Frequency Continuous-Wave Radar for Detecting Small UAV

Pieraccini

Miccinesi

Rojhani

2019

Sensors

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Step-frequency continuous-wave (SFCW) modulation can have a role in the detection of small unmanned aerial vehicles (UAV) at short range (less than 1–2 km). In this paper, the theory of SFCW range detection is reviewed, and a specific method for correcting the possible range shift due to the Doppler effect is devised. The proposed method was tested in a controlled experimental set-up, where a free-falling target (i.e., a corner reflector) was correctly detected by an SFCW radar. This method was finally applied in field for short-range detection of a small UAV.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Doppler Range Compensation for Step-Frequency Continuous-Wave Radar for Detecting Small UAV

Pieraccini

Miccinesi

Rojhani

2019

Sensors

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“…LIU and PAN -5 of 14 According to the above analysis, the target echo sampling signal after motion compensation can be expressed as follows:…”

Section: Wave Positionmentioning

confidence: 99%

“…In ref. [14], a two-frame SF signal is used to measure the velocity. By combining the positive and negative SF signals, both the velocity measurement accuracy and the speed measurement range are considered, but this requires more echo data and uses more storage space.…”

Section: Introductionmentioning

confidence: 99%

Research on a forward‐looking scanning imaging algorithm for a high‐speed radar platform

Liu

Pan

2023

IET Signal Processing

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The range and azimuth information of a target can be obtained after coherent pulse accumulation of the traditional multiframe stepped‐frequency (SF) synthesis wideband echo and spectrum analysis, and high‐resolution two‐dimensional imaging of the target can be achieved. However, the accumulation of a certain number of pulses requires a long beam dwell time, which cannot meet real‐time imaging requirements for high‐speed radar moving platforms. To solve the above problems, a scanning imaging mode is proposed by combining forward‐looking imaging and scanning imaging, and a target echo signal model with the structure of scanning stepped‐frequency is constructed. The SF pulses are grouped and transmitted according to the scanning order, and the echo pulses are sorted and reorganised. After the timing compensation and range Doppler coupling compensation are completed, the target is located and projected. The proposed imaging mode can achieve high‐resolution scanning forward‐looking imaging and can basically attain an azimuth resolution of approximately 0.1° within the forward‐looking scanning range. This imaging mode has higher real‐time performance and a larger target imaging range than the traditional methods. Moreover, the simulation results showed good performance via the scanning imaging method.

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Application of two-dimensional time-domain correlation method to stepped-frequency radar motion compensation

Zuo

Zhu

Zhao

et al. 2009

2009 2nd Asian-Pacific Conference on Synthetic Aperture Radar

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Study on radar target imaging and velocity measurement simultaneously based on step frequency waveforms

Cited by 7 publications

References 1 publication

A Doppler Range Compensation for Step-Frequency Continuous-Wave Radar for Detecting Small UAV

A Doppler Range Compensation for Step-Frequency Continuous-Wave Radar for Detecting Small UAV

Research on a forward‐looking scanning imaging algorithm for a high‐speed radar platform

Application of two-dimensional time-domain correlation method to stepped-frequency radar motion compensation

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