Minimum radar cross section bounds for passive radar responsive tags

Bidigare, Patrick; Stevens, T.; Correll, Bill; Beauvais, Michel

doi:10.1109/acssc.2004.1399392

Cited by 4 publications

(5 citation statements)

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“…However, if the two targets are at least ct/2 apart, then as the pulse trailing edge strikes the first target the leading edge will start to return from target 2, and two distinct returned pulses will be produced. [13]Thus, dR should be greater or equal to ct/2. And since the radar bandwidth B is equal to 1/t, then ∆R = c τ / 2=c / 2B (4)…”

Section: Mathematical Expression For the Design Of The System 31 Radar Range And Cross Rangementioning

confidence: 99%

Distinction of Closely Spaced Targets using Pseudo Resolution Technique

Agarwal¹,

Bhaskar²,

Bera³

2012

IJCA

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The radar range resolution depends on signal bandwidth thereby detection of multiple closely spaced scattered points depends on bandwidth. To resolve this method of pseudo resolution is introduced which exploits the bandwidth allocation and increases the resolution of the overlapping scattered point (target/multipath). This resolution can be achieved by increasing the bandwidth of the received signal at receiver by stuffing zeros in between the samples received. This is why such bandwidth allocation is referred to as virtual bandwidth. The entire method is called Pseudo resolution.

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Section: Mathematical Expression For the Design Of The System 31 Radar Range And Cross Rangementioning

confidence: 99%

Distinction of Closely Spaced Targets using Pseudo Resolution Technique

Agarwal¹,

Bhaskar²,

Bera³

2012

IJCA

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“…The remaining parameters in (4) were set based on typical system values, 4,7 and are listed along with a summary of the other parameters in Table 1. The radar cross section value of σ 0 = −28 dB corresponds to a minimal reflectivity observed in an urban setting 8 (e.g., pavement, asphalt).…”

Section: Clutter-to-noise Ratiomentioning

confidence: 99%

System analysis of a short range SAR repeater

Rigling

2006

SPIE Proceedings

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Emerging wide-area synthetic aperture radar (SAR) system concepts call for a single data collection platform to orbit a large (e.g, 20 km) spot at a nominal range of 40 km. The large standoff distance and desire for fine resolution, coupled with a need for persistent real-time sensing, pose a significant challenge in terms of clutter-tonoise ratio (CNR) performance and data processing. Increased CNR and reduced processing load can be achieved by decreasing the range of the SAR system and the size of the area of interest. Employing multiple cooperating SAR systems allows the same overall coverage area to be maintained with a patchwork of SAR footprints. This paper analyzes a high-level system architecture, for multiple SAR systems, that provides uninterrupted coverage over a wide area. System analysis includes eclipsing diagrams, CNR performance and mutual interference issues.

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“…Modeling natural backscattering as a complex circular Gaussian random variable and assuming a uniform phase distribution for the tag, the probability density expressions derived in [20] may be used. False alarm rate P FA determines threshold τ , beyond which the presence of a tag is declared.…”

Section: B Taggingmentioning

confidence: 99%

“…In SAR imagery detection, P FA = 10 −8 is often chosen. For P D = 0.95, the following equations were derived in [20] …”

Section: B Taggingmentioning

confidence: 99%

“…Considering ERS parameters, NEσ 0 = −21 dB and δ gr = δ az = 30 m, and E[G d ] = 1 dB from Table III. Assuming a representative terrain backscattering of σ 0 = −10 dB, a σ 2 tag ≥ 27 dBm 2 is obtained from (20), a specification that can be met by modern transponders [21]. Code length has an impact on the code synchronization procedure, the success of which ensures the availability of a detection statistic.…”

Section: B Taggingmentioning

confidence: 99%

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Signal Processing Issues for the Exploitation of Pulse-to-Pulse Encoding SAR Transponders

Boncori

Schiavon

2008

IEEE Trans. Geosci. Remote Sensing

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Abstract-Synthetic aperture radar signal processing issues related to the exploitation of a pulse-to-pulse encoding transponder using pseudorandom codes discussed analytically. Namely the focusing algorithm, the code synchronization procedure and the properties of the code induced gain against non-encoding point scatterers and distributed ones. A time-domain processing algorithm and a code synchronization procedure are proposed and validated on simulated data and on a European Remote Sensing Satellite-2 data set containing prototypes of such a device. The interaction of the transponder signal with terrain backscattering is analyzed by deriving parameters that are useful for performance assessment. These are related to the relevant parameters in radiometric calibration, interferometric applications, and tagging.

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Minimum radar cross section bounds for passive radar responsive tags

Cited by 4 publications

References 0 publications

Distinction of Closely Spaced Targets using Pseudo Resolution Technique

Distinction of Closely Spaced Targets using Pseudo Resolution Technique

System analysis of a short range SAR repeater

Signal Processing Issues for the Exploitation of Pulse-to-Pulse Encoding SAR Transponders

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