Multiple correlator reference processor

Details Multiple correlator reference processor Multiple correlator reference processor

1979-05-03

1981-08-11

Gruber, Felix D.

Boots, shoes, and leggings

364517, 364728, 364819, 367125, 367901, G06F 1520, G06G 719, G01S 386

Patent

active

042837677

ABSTRACT:
A signal processor for use with an array of antenna elements comprises a plurality of pairs of receiver channels which receive signals from respective halves of the array. The component of the signals resulting from noise, such as the noise generated within the ocean, is substantially decorrelated between the respective halves of the array, while a component of the signal obtained from a source of a desired signal is coherent between the two halves of the array. The signals in each pair of channels are translated to intermediate frequencies by mixing the signals with reference signals of differing frequencies in each of the respective pairs of channels. The translated signals in each pair of channels are then multiplied together to produce a signal of substantially constant amplitude which is suitable for detection, or for a bearing deviation indication. Output signals of the respective multipliers are summed together and passed through a low pass filter having a pass band approximately equal to the reciprocal of the anticipated dwell time of the signal source within the beam width of the array of antenna elements. The uncorrelated noise results in an alternating component in the products of the respective multipliers which are substantially cancelled in the summing and filtering to produce a higher signal-to-noise ratio.

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patent: 4034376 (1977-07-01), Barton
patent: 4041494 (1977-08-01), Ewen et al.
patent: 4090147 (1978-05-01), Seidel

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