Shaping the spectrum of random-phase radar waveforms
| DWPI Title: Operating method for radar system involves transmitting pulse signal having waveform that is based upon randomized sequence of chips, in which signal transmitted from transceiver of the radar system |
| Abstract: The various technologies presented herein relate to generation of a desired waveform profile in the form of a spectrum of apparently random noise (e.g., white noise or colored noise), but with precise spectral characteristics. Hence, a waveform profile that could be readily determined (e.g., by a spoofing system) is effectively obscured. Obscuration is achieved by dividing the waveform into a series of chips, each with an assigned frequency, wherein the sequence of chips are subsequently randomized. Randomization can be a function of the application of a key to the chip sequence. During processing of the echo pulse, a copy of the randomized transmitted pulse is recovered or regenerated against which the received echo is correlated. Hence, with the echo energy range-compressed in this manner, it is possible to generate a radar image with precise impulse response. |
| Use: Operating method for radar system (claimed). |
| Advantage: Enables to regenerate the same chip sequence for comparison to the received echoes, and furthermore, it is possible to determine any deviation in the reflected pulse from the transmitted waveform and hence identify artifacts in the reflected pulse to facilitate generation of a radar image. |
| Novelty: The operating method involves assigning, at the processing component, sample frequencies of the waveform spectrum profile to a set of chips, configuring, at the processing component, an order of chips in the set of chips based upon a randomization key to form a randomized sequence of chips, and transmitting a pulse signal having a waveform that is based upon the randomized sequence of chips, the signal transmitted from a transceiver of the radar system. |
| Filed: 12/11/2013 |
| Application Number: US14102928A |
| Tech ID: SD 12432.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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