Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Reexamination Certificate
2009-05-26
2011-12-06
Tarcza, Thomas (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
C342S463000
Reexamination Certificate
active
08072383
ABSTRACT:
A multicarrier modulation position determination method that includes deploying at least one known receiver with a known location and a second receiver with an unknown location. At least two signals of opportunity with different locations are obtained by both the receiver and the second receiver. The signals having a plurality of block data, the block data having block boundaries. The block boundaries including a beginning block boundary and an end block boundary. The block data further including a cyclic prefix at the beginning block boundary. Acquiring a plurality of data samples for at least a portion of the block data and correlating the attained signal of opportunity between the receivers. The correlating process includes the calculation of a time difference of arrival between the known receiver and the second receiver. The time difference of arrival is calculated by aligning the block boundaries and computing a single scalar statistical feature associated with each block. The location of the second receiver is calculated by using a plurality of single scalar statistical features.
REFERENCES:
patent: 6094168 (2000-07-01), Duffett-Smith et al.
patent: 6492945 (2002-12-01), Counselman et al.
J.S. Velotta, “Navigation Using Orthogonal Frequency Division Multiplexed Signals of Opportunity” Master's thesis, Air Force Institute of Technology, Wright-Patterson AFB, OH, Sep. 2007.
K.A. Fisher, “The navigation potential of signals of opportunity-based time difference of arrival measurements” Ph.D. dissertation, Air Force Inst of Technology, Wright-Patterson AFB, OH, Mar. 2005.
Martin, R.K.; Velotta, J.S.; Raquet, J.F.; “Bandwidth Efficient Cooperative TDOA Computation for Multicarrier Signals of Opportunity”, IEEE Transactions on Signal Processing, vol. 57, Issue 6, 2009.
Martin, R.K.; Velotta, J.S.; Raquet, J.F.; “Multicarrier Modulation as a Navigation Signal of Opportunity”, 2008 IEEE Aerospace Conference, 2008.
Martin Richard K.
Raquet John F.
Velotta Jamie S.
AFMCLO-JAZ
Figer Charles
Galt Cassie
Tarcza Thomas
The United States of America as represented by the Secretary of
LandOfFree
Navigation and position determination with a multicarrier... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Navigation and position determination with a multicarrier..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Navigation and position determination with a multicarrier... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4269824