Phase coherent radar system using fast frequency agile waveform synthesis
March 22, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDual frequency transmission apparatus for frequency-agile radar systems utilizing MTI techniques High resolution microwave seeker Pulsed coherent doppler radar with frequency agility Airborne frequency-modulation radar and its application to a missile homing head Method of operating an agile beam coherent radar Millimeter wave length guidance system Frequency agile synthetic aperture radar Pulse radar and components therefor Pulse radar and components therefor All weather tactical strike system (AWTSS) and method of operation InventorsAssigneeApplicationNo. 620363 filed on 03/22/1996US Classes:342/202, For pulse modulation342/62, Missile or spacecraft guidance342/97, With automatic lock-on342/131, Combined with pulse modulation (e.g., frequency agile)342/137, With variable pulse repetition frequency (PRF) or pulse width342/140, With azimuth and elevation determination342/188, With polarization342/194, Complex signal (in phase and quadrature)342/196Fast fourier transform (FFT)ExaminersPrimary: Sotomayor, John B.Attorney, Agent or FirmInternational ClassesG01S 007/292G01S 013/72 AbstractA radar system in which a frequency agile synthesizer is used to provide rapid frequency shifts and in which measures are taken to maintain phase coherency. The system is fully coherent such that all signals are derived from a common source and are capable of high pulse repetition rates in excess of 1 MHz. There are no inherent transmit duty cycle restrictions and the system is able to transmit complex phase and frequency modulated waveforms. A frequency interleaving scheme is used to resolve range ambiguities at high pulse repetition frequencies and the use of a complementary phase coding scheme allows a high range resolution processing with the transmitted waveforms.Field of SearchFor pulse modulationMissile or spacecraft guidance Automatic target detection With automatic lock-on Combined with pulse modulation (e.g., frequency agile) With variable pulse repetition frequency (PRF) or pulse width With azimuth and elevation determination Off boresight Digital With polarization Complex signal (in phase and quadrature) Digital processing Fast fourier transform (FFT) Combined with pulse modulation With noise reduction | |
