Method and apparatus for controlling the false alarm rate of a r

Details Method and apparatus for controlling the false alarm rate of a r Method and apparatus for controlling the false alarm rate of a r

1995-03-28

1996-01-30

Lobo, Ian J.

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

Return signal controls radar system

Receiver

342 91, 367 98, G01S 734, G01S 1500

Patent

active

054883776

ABSTRACT:
A method and apparatus for controlling the false alarm rate of a receiver which detects each received signal having a power level greater than a predetermined threshold level which is received within a predetermined detection interval. The receiver is adapted to receive signals in response to source signals having a predetermined transmission period. The signals detected within each transmission period can include an initial signal and a plurality of excess signals received subsequent to the initial signal. The total number of detected signals and the number of excess signals received within the predetermined detection interval are counted and a ratio therebetween is determined. Based upon the ratio of the total number of signals to the number of excess signals, the relationship between the power level of the received signals and the threshold level is adjusted in order to control the false alarm rate of the receiver. In one embodiment, the threshold level is adjusted based upon the ratio of the total number of received signals to the total number of excess signals. In another embodiment, the amplification or attenuation of the received signals is adjusted in response to the ratio of the total number of received signals to the total number of excess signals.

REFERENCES:
patent: 4489319 (1984-12-01), Hansen
patent: 4586043 (1986-04-01), Wolf
patent: 5337251 (1994-08-01), Pastor

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