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Class Information
Number: 342/194
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > With particular circuit > Complex signal (in phase and quadrature)
Description: Subject matter including receiver circuit means to separate returned radar signals into "in phase" and quadrature" components.










Patents under this class:
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Patent Number Title Of Patent Date Issued
4876489 Signal processing Oct. 24, 1989
4866449 Multichannel alignment system Sep. 12, 1989
4855747 Method of target imaging and identification Aug. 8, 1989
4851853 Signal source distortion compensator Jul. 25, 1989
4837578 Apparatus and method for range detection using the analytic signal identified from the received signal Jun. 6, 1989
4833479 Digital poly-phase pulse compressor May. 23, 1989
4812849 Nonquadrature correction circuit Mar. 14, 1989
4801939 High-speed data compressor/decompressor for synthetic aperture radar Jan. 31, 1989
4800388 Apparatus for measuring pulse compression ratio Jan. 24, 1989
4783660 Signal source distortion compensator Nov. 8, 1988
4772889 Device for calculating a discrete fourier transform and its application to pulse compression in a radar system Sep. 20, 1988
4768035 Coherent radar digital data collector and sampling technique for noncoherent transmitter radars Aug. 30, 1988
4760398 Methods and apparatus for determining the differential sideband power of radar signals Jul. 26, 1988
4731612 Method and apparatus for eliminating short pulses in a doppler radar Mar. 15, 1988
4730189 Pulse Doppler radar with variable pulse repetition frequency Mar. 8, 1988
4723125 Device for calculating a discrete moving window transform and application thereof to a radar system Feb. 2, 1988
4719466 Adaptive radar signal processor for the detection of useful echo and the cancellation of clutter Jan. 12, 1988
4717916 High resolution imaging doppler interferometer Jan. 5, 1988
4713666 Method of processing the sum and difference signals of a radar of the monopulse type for estimating the parasite phase introduced between these signals by the ultrahigh frequency formation cir Dec. 15, 1987
4712109 Device for the identification of undesirable echoes in radar systems Dec. 8, 1987
4710772 Log magnitude pulse interference detection for a radar system Dec. 1, 1987
4694298 Adaptive, fault-tolerant narrowband filterbank Sep. 15, 1987
4673941 Digital pulse compression filter Jun. 16, 1987
4670755 Pulse radar apparatus Jun. 2, 1987
4667200 Pulse radar apparatus May. 19, 1987
4660042 Cancellation system for transmitter interference with nearby receiver Apr. 21, 1987
4649395 Pulse radar apparatus Mar. 10, 1987
4647874 Doppler signal processing circuitry Mar. 3, 1987
4646095 Method of resolving closely spaced targets Feb. 24, 1987
4644356 Bistatic coherent radar receiving system Feb. 17, 1987
4635060 Coherent-on-receive radar with prephase correction circuit Jan. 6, 1987
4635059 Vehicle mounted Doppler radar system Jan. 6, 1987
4618863 Continuous wave radar with ranging capability Oct. 21, 1986
4616228 System for suppressing unwanted long-range and/or second-time-around radar echoes Oct. 7, 1986
4616229 System and method of compensating a doppler processor for input unbalance and an unbalance measuring sensor for use therein Oct. 7, 1986
4608567 Fast envelope detector with bias compensation Aug. 26, 1986
4600925 Vector phase angle change distribution processor Jul. 15, 1986
4591857 Programmable LFM signal processor May. 27, 1986
4586044 Clutter positioning for electronically agile multi-beam radars Apr. 29, 1986
4554548 Side-lobe suppressing unit for a pulse radar apparatus Nov. 19, 1985
4547775 Frequency agile imaging radar with error frequency correction Oct. 15, 1985
4538149 Frequency agile magnetron imaging radar Aug. 27, 1985
4536764 Method of counting multiple targets in the post detection processing of a radar Aug. 20, 1985
4532515 Angle of arrival measurements for two unresolved sources Jul. 30, 1985
4524361 Radar systems employing two kinds of pulses Jun. 18, 1985
4521779 Pulse compression system Jun. 4, 1985
4513383 Separation of communication signals in an adaptive antenna array Apr. 23, 1985
4504833 Synthetic pulse radar system and method Mar. 12, 1985
4499467 Doppler radar sets with target direction sensing capability Feb. 12, 1985
4489319 Detector with variance sensitivity Dec. 18, 1984

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