Scaler scoring system
AssigneeMotorola, Inc.
InventorsRichard L. Ward, Keith A. Olds
Life of this patent
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Abstract
A radar transceiver and communications transmitter mounted on a target for communicating video signals from the radar to a remote receiver which has associated therewith an FFT detector for detecting scoring encounters, and a computer or microprocessor which first analyzes the video signals to provide signals indicative of the Doppler frequency shift at a plurality of different times through the use of autoregressive spectral estimation and then computes a model projectile flight pattern, including miss distance and closing velocity, which flight pattern fits the computed Doppler frequency shifts at the plurality of different times.
Claims14
An improved scaler scoring system for indicating the miss distance of a projectile from a target, the scoring system comprising:
- a radar transceiver mounted on the target and situated to illuminate the projectile during at least a portion of a fly-by, the illumination providing in the transceiver a video signal including a Doppler frequency shift;
- communication means including at least a transmitter mounted on the target and a remote receiver, said transmitter being coupled to said radar transceiver for receiving the video signal and communicating the video signal to said remote receiver;
- first computing means coupled to said remote receiver for receiving the video signal, for providing signals indicative of the Doppler frequency shift at a plurality of different times during the illumination of the projectile, for providing a plurality of discrete points in time of a frequency spectrum of the video signal by overdetermined rational signal modeling, and for performing the overdetermined rational signal modeling by auto-regressive spectral estimation;
- and
- second computing means coupled to said first computing means for receiving the signals indicative of the Doppler frequency shift and for computing a model projectile flight pattern, including miss distance and projectile speed, which flight pattern would produce substantially similar Doppler frequency shifts at approximately the same plurality of different times.
An improved scaler scoring method providing an indication of the miss distance of a projectile from a target, said method comprising the steps of:
- transmitting an RF signal from the target so as to illuminate the projectile for at least a portion of a fly-by;
- receiving reflected RF signals from the projectile at the target, which reflected RF signals include a Doppler frequency shift produced by the relative speeds of the target and projectile;
- removing the RF signal from the reflected RF signal to provide a video signal including the Doppler frequency shift;
- transmitting the video signal to a receiver at a remote site;
- utilizing the video signal at the remote site to generate a plurality of signals indicative of the specific Doppler frequency shift at each of a plurality of different times during the illumination of the projectile through the use of overdetermined rational signal modeling techniques which include autoregressive spectral estimation;
- and
- utilizing the plurality of signals to compute a model projectile flight pattern, including miss distance, which flight pattern would produce substantially similar Doppler shifts at approximately the same plurality of different times.
Dependencies are inferred from the claim text.