Communications: directive radio wave systems and devices (e.g. – Testing or calibrating of radar system – By monitoring
Patent
1995-04-07
1996-09-03
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Testing or calibrating of radar system
By monitoring
342377, G01S 740
Patent
active
055527914
ABSTRACT:
An apparatus and method for calibrating a plurality of sensors having a predetermined spatial distribution. The method according to the invention herein can include the steps of transmitting a first calibration signal in a first direction through a transmission medium to at least one of the sensors; receiving from the sensor a first portion of the first calibration signal through the transmission medium; determining at least one first calibration signal parameter from the first calibration signal and the first portion according to a first predetermined method; transmitting a second calibration signal in a second direction through the transmission medium to the sensor; receiving from the sensor a second portion of the second calibration signal through the transmission medium; determining at least one second calibration signal parameter from the second calibration signal and the second portion according to a second predetermined method; and determining at least one calibration parameter from the first calibration signal parameter and the second calibration signal according to a third predetermined method. The first predetermined method can include determining a first transfer ratio of the first calibration signal to the first portion; the second predetermined method can include determining a second transfer ratio of the second calibration signal to the second portion; the third predetermined method can include determining a product of the second transfer ratio and the first transfer ratio; and the fourth predetermined method can include determining a transfer ratio of the reference calibration parameter and a test calibration parameter.
REFERENCES:
patent: 5117239 (1992-05-01), Riza
patent: 5307073 (1994-04-01), Riza
patent: 5374935 (1994-12-01), Forrest
patent: 5461389 (1995-10-01), Dean
Hans Steyskal and John F. Rose, Digital Beamforming for Radar Systems, Microwave Journal, Jan., 1989 at 121-123, 125, 128-132, 134-135, 136.
Northrop Grumman Corporation
Sotomayor John B.
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