초록 ▼

A radar having a multiplicity of receive beams stacked in elevation and a target height extractor especially for use therein are disclosed. In operation, a set of range sweeps corresponding to an azimuth scan of the stacked receive beams across a detected target is established. A range cell interval

A radar having a multiplicity of receive beams stacked in elevation and a target height extractor especially for use therein are disclosed. In operation, a set of range sweeps corresponding to an azimuth scan of the stacked receive beams across a detected target is established. A range cell interval corresponding to the detected target is estimated for each range sweep of the set. A target range measurement is computed from a set of estimated range intervals. Only the radar receive beam echo information corresponding to the estimated range cell interval for each range sweep of the established set is used by the height extractor to compute a corresponding set of elevation angles. A target elevation angle is formed as the weighted average of this computed set. Only one height computation is performed for each established set of range sweeps based on a function of factors including the computed target elevation angle and computed range measurement of the corresponding established set of range sweeps.

대표청구항 ▼

A radar for detecting a target and computing measurements thereof, said radar including: an antenna assembly for generating a multiplicity of receive beams stacked in elevation; a transmitter for driving said antenna assembly to transmit radar pulses at a pulse repetition frequency (PRF) and with a

A radar for detecting a target and computing measurements thereof, said radar including: an antenna assembly for generating a multiplicity of receive beams stacked in elevation; a transmitter for driving said antenna assembly to transmit radar pulses at a pulse repetition frequency (PRF) and with a desired elevation coverage to illuminate targets within said stacked receive beams, the interpulse periods of said pulsed transmissions constituting range sweeps of said radar, said radar being operative to scan said pulsed transmissions and associated receive beams in azimuth and to receive echo pulses within the range sweeps as said stacked receive beams scan past objects in said elevation coverage; an echo pulse conditioning channel for each receive beam, each channel comprising: first means for discriminating between target and non-target echo pulses to generate a first signal over a range interval in a range sweep corresponding to an identified target echo pulse; second means for generating second signals in each range sweep from corresponding echo pulses which are identified as potential targets; and third means for extracting the amplitudes from the received echo pulses and generating third signals representative thereof; and computing means comprising: means for establishing a set of range sweeps in azimuth for a common identified target in accordance with said correspondingly generated first signals; means for computing a target range measurement for said common identified target of said established set of range sweeps; means for computing a target elevation angle for said commonly identified target of each range sweep of said established set based on a function of said correspondingly generated first, second and third signals associated therewith; means for weighting each computed elevation angle of said range sweep set; means for combining said set of weighted elevation angles to form a composite elevation angle for said range sweep set; and means for computing a height measurement for said identified target of said established set of range sweeps based on factors including said formed composite elevation angle and computed target range measurement thereof.