Communications: directive radio wave systems and devices (e.g. – Air traffic control – Secondary surveilance radar
Reexamination Certificate
2011-05-03
2011-05-03
Sotomayor, John B (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Air traffic control
Secondary surveilance radar
C342S040000, C342S039000, C342S032000
Reexamination Certificate
active
07936300
ABSTRACT:
The processing method according to the invention is a method of processing replies from targets interrogated by a surveillance radar according to a mode S interrogation of all the targets present in the receiving lobe of the radar, whereby the different targets present in the receiving lobe of the radar are interrogated at least once, the set of the mode S reply signals received for this lobe are collected after each interrogation, a reply detection processing operation is performed for each target and errors are detected and, if necessary, corrected then the corresponding blips are extracted, and this method is characterized in that said signal quality detection and determination processing operation consists in forming a synthetic message with the set of replies to each interrogation for each target, establishing, for each bit of the message, the value and the quality of this bit and performing the error detection and correction using this synthetic message, and the three variables Σ, Δ and monopulse of all the failed replies from the same target are exploited to construct the synthetic message.This processing operation is useful in highly polluted electromagnetic environments where the existing methods are inadequate: the same target may be asked the question again for reasons other than a reply failure.
REFERENCES:
patent: 5063386 (1991-11-01), Bourdeau et al.
patent: 5182563 (1993-01-01), Blinchikoff et al.
patent: 5220329 (1993-06-01), Verbeke et al.
patent: 5317317 (1994-05-01), Billaud et al.
patent: 5341139 (1994-08-01), Billaud et al.
patent: 5406288 (1995-04-01), Billaud et al.
patent: 5432517 (1995-07-01), Billaud et al.
patent: 5455586 (1995-10-01), Barbier et al.
patent: 5528244 (1996-06-01), Schwab
patent: 5825322 (1998-10-01), Capozoli
patent: 5835059 (1998-11-01), Nadel et al.
patent: 6856274 (2005-02-01), Johnson
patent: 7408497 (2008-08-01), Billaud et al.
patent: 7471235 (2008-12-01), Ootomo et al.
patent: 2004/0046687 (2004-03-01), LaFrey et al.
patent: 2005/0156777 (2005-07-01), King et al.
patent: 2006/0119502 (2006-06-01), Ootomo et al.
patent: 2007/0252750 (2007-11-01), Jean et al.
patent: 2008/0231493 (2008-09-01), Billaud et al.
patent: 2008/0238758 (2008-10-01), Billaud et al.
patent: 2010/0026553 (2010-02-01), Billaud
patent: 0 426 543 (1991-05-01), None
patent: 0 577 480 (1994-01-01), None
patent: 1 316 817 (2003-06-01), None
patent: 1 635 189 (2006-03-01), None
patent: 1 640 743 (2006-03-01), None
patent: 2 860 882 (2005-04-01), None
patent: WO 2005/085898 (2005-09-01), None
Gaspare Galati et al., “Decoding Techniques for SSR Mode S Signals in High Traffic Environment”, Radar Conference, Oct. 2005, pp. 399-402.
Shi-Yi Chen et al., “Error Correcting Cyclic Redundancy Checks based on Confidence Declaration”, 6thInternational Conference on ITS Telecommunications Proceedings, Jun. 2006, pp. 511-514.
W. Harman et al., “Techniques for Improved Reception of 1090 MHZ ADS-B Signals”, Digital Avionics Systems Conference, Oct. 1998, pp. G25-1-G25-9, vol. 2, The AIAA/IEEE/SAE, Bellevue WA, USA.
Baker & Hostetler LLP
Sotomayor John B
Thales
LandOfFree
Method for reducing multipath propagation effects during the... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for reducing multipath propagation effects during the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for reducing multipath propagation effects during the... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2628304