Random binary modulated sensor

Details Random binary modulated sensor Random binary modulated sensor

1989-07-20

1994-08-09

Sotomayor, John B.

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

Return signal controls external device

Proximity fuze

342145, 102214, G01S 1332

Patent

active

053370520

ABSTRACT:
A random binary modulated sensor transmits a continuous wave r.f. signal ulated by a binary random bit pair code signal which is transmitted by an antenna. A return signal reflected from a target is received by the antenna. A receiver mixer modulates the return signal with the r.f. signal and a delay circuit delays the binary random bit pair code. A coorelator receives the modulated return signal and delayed binary random bit pair code for producing a doppler output signal. A separate r.f. path in which a portion of the modulated r.f. signal is variably attenuated and variably phase shifted is present to cancel noise signals generated by antenna mismatch in transmission.

REFERENCES:
patent: 3874296 (1975-04-01), Hedenark
patent: 4019185 (1977-04-01), Morgan
patent: 4059052 (1977-11-01), Karr
patent: 4219818 (1980-08-01), Mansur, Jr.
patent: 4238785 (1980-12-01), Hannigan
patent: 4604622 (1986-08-01), Delon et al.
patent: 4651647 (1987-03-01), Baker
patent: 5291202 (1994-03-01), McClintock

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