A delay-line cancellation method for clutter attenuation and elimination of blind speed

Q. M. Alfred; T. Chakravarty; G. Singh; Salil K. Sanyal

doi:10.1007/s10762-006-9152-1

A delay-line cancellation method for clutter attenuation and elimination of blind speed

Q. M. Alfred, T. Chakravarty, G. Singh, Salil K. Sanyal

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

In this paper, a conceptual schematic for the search radar has been presented which offers clutter cancellation as well as blind speed elimination. It is assumed that the radar is performing conical scan in both azimuth and elevation. For such cases, strong clutter signals are likely to be intercepted from off-boresight angles. A pulse-to-pulse comparison method is presented where the radar transmits and receives SUM beam during the first pulse and DIFFERENCE beam in the second pulse. The detected voltages for the echoes received during the pulse intervals are subtracted from each other and the negative voltage at the output of subtractor is discarded. This result in a narrow beam pointed in the direction of angle of arrival. This method, in receive only mode, can also be used for calibration of large phased arrays.

Original language	English
Pages (from-to)	1529-1538
Number of pages	10
Journal	International Journal of Infrared and Millimeter Waves
Volume	27
Issue number	11
DOIs	https://doi.org/10.1007/s10762-006-9152-1
Publication status	Published - Nov 2006
Externally published	Yes

Keywords

Blind speed
Clutter
DIFFERENCE pattern
Delay line
SUM pattern

ASJC Scopus subject areas

Radiation
Atomic and Molecular Physics, and Optics
Instrumentation
Condensed Matter Physics
Physics and Astronomy (miscellaneous)
Electrical and Electronic Engineering

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10.1007/s10762-006-9152-1

Cite this

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title = "A delay-line cancellation method for clutter attenuation and elimination of blind speed",

abstract = "In this paper, a conceptual schematic for the search radar has been presented which offers clutter cancellation as well as blind speed elimination. It is assumed that the radar is performing conical scan in both azimuth and elevation. For such cases, strong clutter signals are likely to be intercepted from off-boresight angles. A pulse-to-pulse comparison method is presented where the radar transmits and receives SUM beam during the first pulse and DIFFERENCE beam in the second pulse. The detected voltages for the echoes received during the pulse intervals are subtracted from each other and the negative voltage at the output of subtractor is discarded. This result in a narrow beam pointed in the direction of angle of arrival. This method, in receive only mode, can also be used for calibration of large phased arrays.",

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author = "Alfred, {Q. M.} and T. Chakravarty and G. Singh and Sanyal, {Salil K.}",

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T1 - A delay-line cancellation method for clutter attenuation and elimination of blind speed

AU - Alfred, Q. M.

AU - Chakravarty, T.

AU - Singh, G.

AU - Sanyal, Salil K.

PY - 2006/11

Y1 - 2006/11

N2 - In this paper, a conceptual schematic for the search radar has been presented which offers clutter cancellation as well as blind speed elimination. It is assumed that the radar is performing conical scan in both azimuth and elevation. For such cases, strong clutter signals are likely to be intercepted from off-boresight angles. A pulse-to-pulse comparison method is presented where the radar transmits and receives SUM beam during the first pulse and DIFFERENCE beam in the second pulse. The detected voltages for the echoes received during the pulse intervals are subtracted from each other and the negative voltage at the output of subtractor is discarded. This result in a narrow beam pointed in the direction of angle of arrival. This method, in receive only mode, can also be used for calibration of large phased arrays.

AB - In this paper, a conceptual schematic for the search radar has been presented which offers clutter cancellation as well as blind speed elimination. It is assumed that the radar is performing conical scan in both azimuth and elevation. For such cases, strong clutter signals are likely to be intercepted from off-boresight angles. A pulse-to-pulse comparison method is presented where the radar transmits and receives SUM beam during the first pulse and DIFFERENCE beam in the second pulse. The detected voltages for the echoes received during the pulse intervals are subtracted from each other and the negative voltage at the output of subtractor is discarded. This result in a narrow beam pointed in the direction of angle of arrival. This method, in receive only mode, can also be used for calibration of large phased arrays.

KW - Blind speed

KW - Clutter

KW - DIFFERENCE pattern

KW - Delay line

KW - SUM pattern

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JO - International Journal of Infrared and Millimeter Waves

JF - International Journal of Infrared and Millimeter Waves

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A delay-line cancellation method for clutter attenuation and elimination of blind speed

Abstract

Keywords

ASJC Scopus subject areas

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