| 摘要 |
A pulse-doppler radar tracking system is disclosed employing four filter channels for tracking range, velocity, azimuth and elevation. Each channel is mechanized in a Kalman filter form by a stored program in a digital computer. The range channel estimates target range, RTPR, range rate, VTPV and acceleration aTPV from one of many received signal frequency spectra at multiples of the pulse repetition frequency (PRF). Once error in the range rate estimate, VTPR, is within a velocity corresponding to lambda PRF/4, the velocity channel is reinitialized in its estimate of target velocity, VTPV, with a corrected velocity computed from the less accurate but unambiguous estimate of velocity, VTPR, and the ambiguous estimate of velocity, VTPV.
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