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Chaotic Detector to Identify Weak Signals in the Presence of Gaussian Noise

October 11 @ 11:30 am - 1:00 pm

IEEE Atlanta Communications Society Chapter presents:

Dr. John Shields of GTRI who will be giving a brief talk on Chaotic Detectors. Please register at


Brief Summary of the talk:

The detection of very weak signals in the presence of background noise is a challenge of significant
interest for many radar, sonar, and communications applications. Standard tools such as the Matched
Filter perform poorly when the signal-to-noise ratio (SNR) is less than about -10 or -20 dB. Therefore,
the detection of these low SNR signals requires the development of more sophisticated signal processing

The chaotic detector is a non-linear detector that is designed to couple to a weak signal of a given
frequency, while (in principle) remaining immune to the background noise. In particular, the non-linear
Duffing Equation, which describes the motion of a damped, driven harmonic oscillator, has proven to be
exceptionally well-suited to the detection of weak sinusoidal signals with SNR less than -30 dB.

This presentation will discuss the design, performance, and limitations of multiple implementations
of Duffing detectors.


Please email with further questions and see below for the event day instructions:


On the day of the event:

1. Lunch is served.

2. Parking is available in the parking deck next to the GTRI conference center building. Simply pull up in front of the gate and it should lift up. Please park in the visitor spaces available on the 2nd floor of the parking deck. For further assistance with parking, please email Reggie Ratcliff at


Speaker(s): Dr. John Shields,

250 14th St NW
Atlanta, Georgia


October 11
11:30 am - 1:00 pm