Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Missile or spacecraft guidance
Reexamination Certificate
2006-12-19
2006-12-19
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Missile or spacecraft guidance
C342S027000, C342S028000, C342S061000, C342S063000, C342S067000, C342S118000, C342S145000, C342S146000, C342S147000, C342S175000, C342S189000, C342S195000, C342S196000, C244S003100, C375S130000, C089S001110, C370S203000, C370S208000, C370S210000
Reexamination Certificate
active
07151478
ABSTRACT:
In some pseudo-orthogonal waveform embodiments, a radar system transmits pseudo-orthogonal waveforms and performs multiple correlations on a combined single receiver channel signal. In some quadratic polyphase waveform embodiments, a radar system may simultaneously transmit frequency separated versions of a single quadratic polyphase waveform on a plurality of transmit antennas, combine the return signal from each antenna into a combined time-domain signal, and perform a Fourier transformation on the combined time-domain signal to locate a target. The radar system may identify a target, such as sniper's bullet, incoming projectile, rocket-propelled grenade (RPG) or a mortar shell. In some embodiments, the system may estimate the target's trajectory to intercept the target. In some embodiments, the system may estimate the target's trajectory and may further extrapolate the target's trajectory to locate the target's source, such as the sniper.
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H. Jafarkhani et al., “Pseudo Orthogonal Designs as Space-Time Block Codes”; No publisher given; no publication place given; no date given.
Adams Vinh N.
Dwelly Wesley H.
Alkov Leonard A.
Finn Thomas J.
Raytheon Company
Vick Karl A.
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