Radar
AssigneeThorn EMI Electronics Limited
InventorRoger Voles
Life of this patent
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Abstract
A radar for a terminally-guided sub-munition is capable of differentiating between spatial depositions of target scatterers and clutter. The radar frequency f is swept, in stepwise manner, over a frequency range F, the frequency of 2N successive batches of M pulses being incremented in steps of f = F 2 N . To minimise variability of hybrid spectrum with relative target velocity, v, a duplexer transmits the 2 NM pulses with a monotonic frequency sequence derived from control circuit and the returns being reordered.
Claims8
A non-coherent pulsed radar comprising means for transmitting none-coherent radar pulses in successive groups and for receiving corresponding returns, the pulses in each group being transmitted in accordance with a respective monotonic sequence of frequencies, each said sequence being different from at least one other sequence,
- transformation means to derive from said returns a plurality of transformation signals representing a distribution of pairs of scatterers, which comprise target and or clutter, as a function of their differential range,
- means to order said returns in accordance with a single monotonic sequence of said transmitted frequencies before they are passed to said transformation means,
- and comparison means for comparing the power in a selected one or a selected group of differential range cells with a threshold value thereby to enable detection of a target.
Dependencies are inferred from the claim text.