Patent ID: 8508404

Claim:
A munition with a passive height-of-burst (HOB) fuze system comprising: a munition; a HOB system, operatively attached to the munition, for producing a HOB signal for the munition at a desired HOB, the system comprising: GPS signal acquisition and demodulation circuitry for acquiring direct and reflected GPS signals for a particular GPS satellite and demodulating the direct and reflected GPS signals to respectively produce a direct pseudo-random code and a reflected pseudo-random code; correlation circuitry for producing a correlation signal indicative of the correlation between the direct pseudo-random code delayed by a period of time related to the desired HOB and the reflected pseudo-random code; and HOB detection circuitry for processing the correlation signal to determine when the munition is at or near a desired HOB and, if at or near the desired height, produce an HOB signal.