scholarly journals Optical Interference Suppression Using MicroPhotonic RF Filter Structure

2004 ◽  
Author(s):  
Rong Zheng ◽  
Kamal E. Alameh ◽  
Zhenglin Wang
Keyword(s):  
Interference Suppression ◽  
Optical Interference ◽  
Rf Filter ◽  
Filter Structure

scholarly journals An Optical Interference Suppression Scheme for TCSPC Flash LiDAR Imagers

2019 ◽  
Vol 9 (11) ◽  
pp. 2206 ◽  
Author(s):  
Lucio Carrara ◽  
Adrian Fiergolski
Keyword(s):  
Interference Suppression ◽  
Time Of Flight ◽  
Integration Time ◽  
Maximum Deviation ◽  
Lidar Signal ◽  
Random Delay ◽  
Optical Interference ◽  
Worst Case ◽  
Flash Lidar ◽  
Autonomous Vehicle Navigation

This paper describes an optical interference suppression scheme that allows flash light detection and ranging (LiDAR) imagers to run safely and reliably in uncontrolled environments where multiple LiDARs are expected to operate concurrently. The issue of optical interference is a potential show-stopper for the adoption of flash LiDAR as a technology of choice in multi-user application fields such as automotive sensing and autonomous vehicle navigation. The relatively large emission angle and field of view of flash LiDAR imagers make them especially vulnerable to optical interference. This work illustrates how a time-correlated single-photon counting LiDAR can control the timing of its laser emission to reduce its statistical correlation to other modulated or pulsed light sources. This method is based on a variable random delay applied to the laser pulse generated by LiDAR and to the internal circuitry measuring the time-of-flight. The statistical properties of the pseudorandom sequence of delays determines the effectiveness of LiDAR resilience against unintentional and intentional optical interference. For basic multi-camera operation, a linear feedback shift register (LFSR) was used as a random delay generator, and the performance of the interference suppression was evaluated as a function of sequence length and integration time. Direct interference from an identical LiDAR emitter pointed at the same object was reduced up to 50 dB. Changing integration time between 10 ms and 100 ms showed a marginal impact on the performance of the suppression (less than 3 dB deviation). LiDAR signal integrity was characterized during suppression, obtaining a maximum relative deviation of the measured time-of-flight of 0.1%, and a maximum deviation of measurements spread (full-width half-maximum) of 3%. The LiDAR signal presented an expected worst-case reduction in intensity of 25%.

A combined forced-attention dichotic listening – Go/Nogo task to assess response inhibition and interference suppression: An auditory event-related potential investigation.

2019 ◽  
Vol 33 (8) ◽  
pp. 1136-1150
Author(s):  
Nathalie Bedoin ◽  
Raphaëlle Abadie ◽  
Jennifer Krzonowski ◽  
Emmanuel Ferragne ◽  
Agathe Marcastel
Keyword(s):  
Response Inhibition ◽  
Dichotic Listening ◽  
Interference Suppression ◽  
Event Related Potential ◽  
Auditory Event

New Approach for IIR Adaptive Lattice Filter Structure Using Simultaneous Perturbation Algorithm

2010 ◽  
Vol 130 (4) ◽  
pp. 422-429
Author(s):  
Jorge Ivan Medina Martinez ◽  
Kazushi Nakano ◽  
Kohji Higuchi
Keyword(s):  
New Approach ◽  
Lattice Filter ◽  
Filter Structure

Frequency-independent smart interference suppression for multi-standard transceivers

2012 ◽  
Author(s):  
Erwin J.G. Janssen ◽  
Dusan Milosevic ◽  
Peter G.M. Baltus ◽  
Arthur H.M. van Roermund ◽  
Hooman Habibi
Keyword(s):  
Interference Suppression ◽  
Frequency Independent
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