Narrow band correlator and noise cancellor

Details Narrow band correlator and noise cancellor Narrow band correlator and noise cancellor

1978-10-06

1990-08-07

Barron, Jr., Gilberto

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

Directive

Utilizing correlation techniques

367901, 328167, G01S 7292, H04B 110

Patent

active

049471775

ABSTRACT:
A narrow band noise cancellor and signal correllator which obtains an increased signal to noise ratio of a received signal from a multi sensor array; the resulting output signal is at double the input frequency. A pair of narrow band similar input signals are added, and subtracted, and the resulting signals are multiplied together. The positive and negative product terms of the signal are separated and the positive term inverted, and the resulting separated signals are individually added with the squared representation of one of the input signals. The resulting added signals are summed and the sum is passed through a narrow band filter having its center frequency at double the input frequency.

REFERENCES:
patent: 3299362 (1967-01-01), Sandberg
patent: 4008439 (1977-02-01), Schroeder

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