Eric WALTON, et al.
Random Noise Radar
26 June 2006
New Radar is Undetectable, Inventor Claims
by LiveScience Staff
A new radar system is virtually undetectable because its signal resembles random noise, according to researchers at Ohio State University.
The radar could be of use to the military and law enforcement, the scientists said today.
The radar uses a very low-intensity signal across a wide range of frequencies, so a TV or radio tuned to any one frequency would interpret the radar signal as a very weak form of static.
"Almost all radio receivers in the world are designed to eliminate random noise, so that they can clearly receive the signal they're looking for," said Eric Walton, who led the work. "Radio receivers could search for this radar signal and they wouldn't find it. It also won't interfere with TV, radio, or other communication signals."
To put it another way, the bandwidth of the new device is thousands of times broader than the signals it might otherwise interfere with, Walton explained.
Like traditional radar, the "noise" radar detects an object by bouncing a radio signal off it and detecting the rebound.
The new radar can be tuned to penetrate solid walls, just as a TV signal does. The military could use it to spot enemy soldiers inside a building, or police could catch speeding drivers without setting off their radar detectors.
Walton, whose team is filing for a patent on the device, said the components cost less than $100.
Vehicle Obstacle Warning Radar
WALTON Eric K.; CHEN, Chi-Chih
Applicant: UNIV OHIO
EC: G01S7/35B; G01S13/32; (+1) IPC: G01S13/93; G01S7/28; G01S7/35 (+10)
[PDF Format: ]
Radar System Using RF Noise
Classification:- international: G01S13/08; G01S7/35; G01S13/34; G01S13/02; G01S13/93; G01S13/00; G01S7/02;- european: G01S7/35; G01S13/34F
Application number: US20050076424 20050308
Priority number(s): US20050076424 20050308; US20030355627 20030131
Also published as: WO2005003810 // US6864834 // US2004150555
Abstract: A radar system that utilizes predetermined, pseudorandom, or random waveforms that may be substantially matched to the impulse response of the radar and any surrounding clutter such that the signal-to-clutter ratio may be optimized and/or such that specific targets may be identified and/or classified.
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