Communications: directive radio wave systems and devices (e.g. – Testing or calibrating of radar system – By monitoring
Patent
1997-10-10
2000-03-14
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Testing or calibrating of radar system
By monitoring
342378, G01S 1300
Patent
active
060378980
ABSTRACT:
A method operating in a communications station for calibrating the communications station, the communications station including an antenna array of antenna elements, each having associated with it and included in a transmit apparatus chain and a receiver apparatus chain. The method comprises transmitting a prescribed signal from each antenna element using the transmit apparatus chain associated with the antenna element while receiving the transmitted signal in receiver apparatus chains not associated with the antenna. Calibration factors for each antenna element are determined as dependent on the associated transmit apparatus chain and receiver apparatus chain transfer functions using the prescribed signal and each of the signals received during transmissions. A communications station also is described which includes: an antenna array of a plurality of elements, each antenna element having associated with it and included in a transmit apparatus chain and a receiver apparatus chain; transmitting means configured to transmit a prescribed signal from each antenna element while receiving the transmitted signal in at least one receiver apparatus chain not associated with the transmitting antenna element; a memory coupled to the receiver apparatus chains for storing the signals received during the transmissions of the prescribed signals; and a signal processor coupled to the memory and configured to determine calibration factors for each antenna element, the calibration factors for a particular antenna element based on the transmit apparatus chain and receiver apparatus chain transfer functions of the transmit and receiver apparatus chains, respectively, that are associated with the particular antenna element.
REFERENCES:
patent: 5274844 (1993-12-01), Harrison et al.
patent: 5530449 (1996-06-01), Wachs et al.
patent: 5543801 (1996-08-01), Shawyer
patent: 5546090 (1996-08-01), Roy, III et al.
PCT Search Report on PCT application PCT/US98/25364 mailed on May 11, 1999.
Barratt Craig H.
Farzaneh Farhad
Parish David M.
ArrayComm, Inc.
Blum Theodore M.
Rosenfeld Dov
Woodward Henry K.
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