Method and apparatus for determination of range and direction for a multiple tone phased array radar in a multipath environment
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorPaul D. Fiore
Life of this patent
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Abstract
A system and method combine multiple data streams in an efficient and optimal manner, based on new techniques, to determine range, relative angle and velocity with respect to a point of reference. Embodiments of the present invention take advantage of the multiple data streams to provide improved performance when the data is contaminated with environmental and system noise. Embodiments of the present invention may be applied to data output from different target estimation systems, including radar, sonar, ultrasonic and laser systems. In addition, embodiments of the present invention may be implemented in systems with multiple tones and multiple antennas, and generally work in multipath environments.
Claims13
A method for determining range and angle of arrival, comprising:
- receiving reflected signals from a target at multiple frequencies by multiple antennas;
- calculating a Fourier transform on the reflected signals;
- storing in memory the Fourier transform results in an array of bins associated with each frequency and antenna;
- determining the peak bin;
- and
- calculating a range and angle of arrival with reference to the target based on the identity of the peak bin and a MUSIC pseudospectrum.
A system for determining range and angle of arrival, comprising:
- a transmitter capable of transmitting multiple frequencies at a target;
- a receiving antenna comprising multiple antenna components that receives transmitted signals reflected off of a target;
- and
- a signal processor, the signal processor calculating a Fourier transform on the reflected signals, storing in memory the Fourier transform results in an array of bins associated with each frequency and antenna, determining the peak bin and calculating a range and angle of arrival with reference to the target based on the identity of the peak bin and a MUSIC pseudospectrum.
Dependencies are inferred from the claim text.