Invention Grant
- Patent Title: Radar with PRF alteration on receive
- Patent Title (中): 雷达与PRF改变接收
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Application No.: US12702664Application Date: 2010-02-09
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Publication No.: US08305256B1Publication Date: 2012-11-06
- Inventor: Arul Manickam , Gregory P. Fonder
- Applicant: Arul Manickam , Gregory P. Fonder
- Applicant Address: US MD Bethesda
- Assignee: Lockheed Martin Corporation
- Current Assignee: Lockheed Martin Corporation
- Current Assignee Address: US MD Bethesda
- Agency: Howard IP Law Group, P.C.
- Main IPC: G01S13/58
- IPC: G01S13/58

Abstract:
A radar system achieves unambiguous target range at a given PRI, in conjunction with unambiguous Doppler, by transmitting CW-LFM pulses and then separating the return signal into subpulses, without requiring any modifications to the transmit waveform. The CW-LFM pulses may be contiguous. The return signals are bandpass-filtered to generate the subpulses, and downconverted to a common frequency such as baseband. Each downconverted subpulse is matched-filtered to the FM slope, and the resulting matched-filtered subpulses are time-aligned. The time-aligned subpulses are Doppler-filtered to determine target velocity.
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