Discrete source location by adaptive antenna techniques

Details Discrete source location by adaptive antenna techniques Discrete source location by adaptive antenna techniques

1985-06-12

1989-08-29

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Directive

Beacon or receiver

342443, 342445, 342376, 342192, 342158, G01S 502

Patent

active

048621803

ABSTRACT:
A signal processor for radar systems having phased array antenna structures. The processor determines the angle of arrival of the signal from a discrete energy source. The separate elements or output ports of the antenna structure are sampled to form a matrix of signal values. These values are converted into polynomial expressions consistent with one of the spectral estimating methods of maximum entropy, maximum likelihood, and thermal noise. The roots of the polynomial expressions are found and compared to the distance of the unit circle in a pole-zero diagram. Roots sufficiently close to the unit circle are selected as representative of the source signal peaks and the angular directions to such sources are determined by the corresponding angular location of the selected roots in the pole-zero diagram.

REFERENCES:
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patent: 4275399 (1981-06-01), Marom
Gabriel, Wm. F., "Spectral Analysis and Adaptive Array Superresolution Techniques," IEEE Proceedings, vol. 68, No. 6, Jun. 1980, pp. 654-666.

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