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PASSIVE RADAR UTILIZING SPACE-BORNE DIGITAL ELECTROMAGNETIC ILLUMINATORS
PASSIVE RADAR UTILIZING SPACE-BORNE DIGITAL ELECTROMAGNETIC ILLUMINATORS
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机译:无源雷达利用空间无界数字电磁照明器
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摘要
In a passive radar system a space-borne transmitter broadcasts wide-band digitally modulated signals over a region and illuminates the region. A receiver antenna is oriented to receive radiation from at least one portion of the region. The portion is an area viewed by the receiver antenna. A reference antenna is oriented toward the transmitter, the reference antenna receives a portion of the wide-band digitally modulated signal. A coherent processing time duration is selected based on: a radar cross-section of a target within the viewed area, a bandwidth of the wide-band digitally modulated signal, and the viewing angle of the receiver antenna. The received signal from the receiver antenna is coherently processed with a reference signal from the reference antenna, over a time interval greater than the coherent processing time duration.
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