Noise rejection using variable-height timing-window technique for pulse signals with variable S/N ratio

This paper proposes a novel technique, known as the variable-height timing window (TW), for rejecting noise in an active source detection system. The basic principle of a TW and a methodology of using a microprocessor to dynamically adjust the height of the TW are presented. This variable-height TW...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2006-04, Vol.55 (2), p.666-674
Main Authors: Zhaoqing Wang, Bo Chen, Cheng, H.H., Shaw, B.D., Palen, J., Ping Feng
Format: Article
Language:English
Subjects:
Aerospace engineering
Laser noise
Laser-based detector
microprocessor control
Microprocessors
Noise cancellation
noise rejection
pulse-signal detection
Road transportation
Road vehicles
Signal to noise ratio
Timing
timing window (TW)
Vehicle detection
Working environment noise
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Summary:This paper proposes a novel technique, known as the variable-height timing window (TW), for rejecting noise in an active source detection system. The basic principle of a TW and a methodology of using a microprocessor to dynamically adjust the height of the TW are presented. This variable-height TW technique has been applied to a laser-based detection system (LBDS) for detecting vehicle information on highways. Field-test results of the LBDS showed that the adaptive nature of the proposed TW approach can effectively reject various types of noise under different environmental conditions. This variable-height TW technique can also be used to remove out-of-window noise and suppress the effect of in-window noise in various field environments in which the signal/noise (S/N) ratio is variable.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2006.870329