System and method for detection and tracking of targets
AssigneeAltratek, Inc.
InventorsOrhan Arikan, Ahmet Kemal Ozdemir
Life of this patent
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Abstract
System and method for detection and tracking of targets, which in a preferred embodiment is based on the use of fractional Fourier transformation of time-domain signals to compute projections of the auto and cross ambiguity functions along arbitrary line segments. The efficient computational algorithms of the preferred embodiment are used to detect the position and estimate the velocity of signals, such as those encountered by active or passive sensor systems. Various applications of the proposed algorithm in the analysis of time-frequency domain signals are also disclosed.
Claims30
A method for generating data for locating reflecting objects, comprising the steps of:
- receiving signals r(t) reflected from at least one object;
- processing the received signals and signals s(t) transmitted to the at least one object to compute a 1-dimensional projection of the cross ambiguity function associated with the received and transmitted signals;
- and
- estimating a signal delay and Doppler shift associated with the at least one object from the computed projection.
A system for generating data for locating reflecting objects, comprising:
- means for receiving signals r(t) reflected from at least one object;
- means for processing the received signals r(t) and signals s(t) transmitted to the at least one object to compute a 1-dimensional projection of the cross ambiguity function associated with the received and transmitted signals;
- and
- means for estimating a signal delay and Doppler shift associated with the at least one object from the computed projection.
A software program product stored on a computer readable medium, adapted for execution by a digital computer, comprising:
- a software program module on said medium, which causes said computer to process digitized signals r(t) carrying information about properties of at least one object and to compute a 1-D projection along arbitrary line of an ambiguity function associated with the digitized signals;
- and
- a software program module on said medium, which causes said computer to estimate a signal delay and Doppler shift associated with the at least one object from the computed projection.
Dependencies are inferred from the claim text.