Mitigation of Transient Doppler Artifacts in Airborne Pulse Doppler Radar

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Authors
  1. Hughes, S.J.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
The Defence Research Establishment Ottawa has developed a Digital Radar Receiver and Data Acquisition System as part of an experimental air-to-air surveillance radar that will be used to demonstrate an air-to-air surveillance capability for the Canadian Forces CP-140 Maritime Patrol Aircraft. This report presents an analysis of the radar return signal expected from a point target, and predicts the existence of transient Doppler artifacts associated with the leading and trailing edges of the radar pulses. A software simulation also produces transient Doppler artifacts, and experimental measurements of a simulated target signal confirm their existence. The magnitude of the artifact is significant when a wideband receiver is used, that is, when the system bandwidth is not small with respect to the radar intermediate frequency. The potential impact of the artifacts on radar performance is discussed, as are techniques to mitigate their deleterious effects.
Keywords
Digital signal processing;Quadrature data;Radar parameters;Quadrature demodulation;Digital demodulation;Coherent radar design
Report Number
DREO-TR-1999-125 — Technical Report
Date of publication
01 Dec 1999
Number of Pages
42
DSTKIM No
CA000537
CANDIS No
512536
Format(s):
Hardcopy;Document Image stored on Optical Disk

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