Signal-acquisition system for a circular array

Details Signal-acquisition system for a circular array Signal-acquisition system for a circular array

1984-12-21

1987-03-31

Blum, Theodore M.

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

Directive

Beacon or receiver

342378, 342 22, 364827, 364516, 364726, 324 77B, G01S 504, G01S 316, G06G 719

Patent

active

046546677

ABSTRACT:
A signal-acquisition system (10) for a circular antenna array (12) includes a two-dimensional compressive receiver (18) that performs a two-dimensional Fourier transformation in time and position on the outputs of the array. Each of the outputs of the compressive receiver (18) is fed to input ports of several processing units (24), which multiply them by an appropriate time-dependent function. The resultant modified signals are then processed by Butler matrices (30) that together have a matrix of output ports (32). Each output port is associated with a different combination of azimuth and elevation angles. A signal source at given azimuth and elevation angles with respect to the array (12) causes its greatest response in the output port (32) associated with those angles.

REFERENCES:
patent: 4035804 (1977-07-01), Overbury
patent: 4084148 (1978-04-01), Koshikawa
patent: 4166980 (1979-09-01), Apostolos et al.
patent: 4180814 (1979-12-01), Barton
patent: 4244037 (1981-01-01), Jelks
patent: 4254417 (1981-03-01), Speiser
patent: 4305159 (1981-12-01), Stromswold et al.
patent: 4332016 (1982-05-01), Berntsen

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