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7623062 |
System and method for target detection with a radar antenna
A system and method for controlling a radar antenna are provided. The method includes generating a first single beam antenna pattern, generating a second single beam antenna pattern and...
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7620094 |
Spread spectrum clock generator
Disclosed is a spread spectrum clock generator which includes: a first delay control type oscillator that variably controls an oscillation period at a control period interval according to a control...
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7606294 |
Channel quality estimation method and receiving apparatus
Channel quality can be detected accurately in a wireless transmission system such as an HSDPA method. In the case of estimating a channel quality of a signal transmitted by a Code Division...
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7586992 |
Apparatus and method for channel estimation and cyclic prefix reconstruction in an OFDM-STBC mobile communication system
An apparatus and method for channel estimation and CP reconstruction in an OFDM-STBC mobile communication system are provided. An ISI canceller cancels ISI signal components from first and second...
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7586972 |
Code division multiple access enhanced capacity system
A code division multiple access (CDMA) communication system using spread spectrum signaling over a communication bandwidth uses two different signal spectra generated using two different respective...
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7580444 |
Frequency hopping communication system
The invention provides an adaptive frequency hopping spread-spectrum (FHSS) transmission system and method, which efficiently utilizes available transmission bandwidth, whilst providing robustness...
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7555029 |
Method for decoding a plurality of standard radio waves and standard radio wave receiver
A method and a standard radio wave receiver for receiving a plurality of standard radio waves respectively having signal configurations in accordance with respective specifications which define...
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7551665 |
Ultra wideband receiver architecture using high order Gaussian pulses and method of operation
An ultra wideband (UWB) receiver system operable to process a high order Gaussian pulse includes an integrator group, a correlator circuit and a comparator circuit. The integrator group includes an...
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7519097 |
Spread-signal multiplexing circuit
The invention relates to a spread-signal multiplexing circuit for frequency-multiplexing a plurality of spread signals that were generated in parallel according to the SSMA scheme. An object of the...
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7508863 |
Method of processing multi-path signals
In the method of processing signals, multi-path signals are received, channel estimates for the received multi-path signals are determined, and a combining operation is applied to the multi-path...
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7505506 |
System and method for generating single sideband, constant envelope, spread spectrum signals with multiple spreading codes
A method of generating a composite signal includes the steps of: (a) generating a plurality of sub-carriers, each sub-carrier having a different frequency position in a frequency spectrum; (b)...
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7372897 |
Portable information communication terminal, program, and recording medium
The number of times for averaging operation for averaging a correlation value of a received signal and a reference signal is properly controlled. When the correlation value is not averaged, since a...
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7352800 |
Method of partial parallel interference cancellation
A method of Partial Parallel Interference Cancellation (PPIC) is provided for recursively eliminating the Multiple Access Interference from a received signal. Such method is to use a recursion way...
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7340277 |
Adaptive antenna for controlling the weighting on a plurality of antenna elements
An optical subscriber system according to the present invention has an adaptive antenna having a plurality of antenna elements, for controlling the weighting on the antenna elements thereby to...
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7292179 |
Instantaneous passive range finding
A method and apparatus for use in determining the range in a single time sample from a platform to a target are disclosed. The method includes receiving radiation emanating from the target at two...
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7212152 |
Monopulse radar system
The present invention provides that a monopulse radar system to correct an amplitude error and a phase error developed between receiving channels and improve the accuracy of a detected angle. A...
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7038620 |
Warped plane phased array monopulse radar antenna
A phased array, phase-amplitude monopulse antenna arrangement for ground, shipboard or airborne radar systems. The phased array antenna is systematically warped and projects partially overlapping,...
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7035651 |
Process and devices for determining the radio reception direction in a mobile communications network
A process is proposed for determining the radio reception direction on the downlink at a radio base station location, comprising a plurality of radio coverage areas, in a mobile communications...
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6717543 |
Radar device for object self-protection
In regard to radar guidance of a launch container ( 15 ) for fragmentation projectiles ( 16 ) for defending against an attacking missile ( 12 ), from the object ( 11 ) to be protected, the present...
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6712140 |
3rd borehole radar antenna and algorithm, method and apparatus for subsurface surveys
The invention relates to a borehole radar tool comprising, in a housing ( 2 ) a transmitting antenna and a receiving antenna both of which comprise, near the housing wall ( 2 ), a dipole antenna (...
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6603422 |
Ground penetrating radar incorporating a real-time multi-target direction finding capability
The Ground Penetrating Radar (GPR) system introduced in this application provides data from an underground medium of the same caliber as that provided by conventional radars in air or space...
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6498582 |
Radio frequency receiving circuit having a passive monopulse comparator
A passive MMIC monopulse comparator includes a plurality of lumped element hybrids having pi and T filter structures. In one embodiment, a first hybrid receives first and second downcoverted...
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6316934 |
System for three dimensional positioning and tracking
A system for monitoring of the position of at least one portion of an object. The system includes a plurality of transmitters operative to transmit alternating magnetic fields within a...
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6211813 |
Compact monopulse source for a focal feed reflector antenna
A monopulse source for a focal feed antenna including at least two waveguides machined in a metal flange supporting a microwave transmission and reception circuit of the antenna, and a dielectric...
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6195035 |
Cylindrical monopulse
A monopulse antenna system comprising an inner antenna and an outer antenna disposed symmetrically about a central axis of symmetry. A central aperture is located at the axis of symmetry through...
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6150975 |
Divergence measurement antenna for single-pulse radar
A divergence measurement antenna for single-pulse radars comprises at least two radiant panels. With their beams having the same center of phase, they are oriented differently. A monotonic function...
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6100841 |
Radio frequency receiving circuit
A compact RF monopulse receiver circuit having a relatively low noise figure which is particularly useful for operation in the millimeter wave frequency range is described. The compact monopulse...
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5914684 |
Electromagnetic transducer system with integrated circuit card adapter
An apparatus according to various aspects of the present invention is configured to collect and/or emit electromagnetic waves, particularly microwaves. In one embodiment, a transducer system...
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5847675 |
Radar with a wide instantaneous angular field and a high instantaneous angular resolution in particular for a missile homing head
This radar with a wide instantaneous angular field and a high instantaneous angular resolution, in particular for a missile homing head, includes essentially: a transmitting antenna with a...
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5815112 |
Planar array antenna and phase-comparison monopulse radar system
A planar array antenna comprises a plurality of antenna elements disposed in a predetermined matrix pattern. Feeders extend from a feed to the antenna elements. High-frequency switches...
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5784022 |
Process and amplitude or phase monopulse radar device for locating flying objects
The process and the corresponding phase or amplitude-single pulse radar device are used to locate a first and possibly a second target (TT1, TT2) detected by the radar beam from the direction x1,...
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5754140 |
Beam sharpened, low sidelobe antenna system
A beam sharpened, low sidelobe antenna is obtained by segmenting the antenna to provide two sub-antennas, one of which is arranged as an interferometer. The output signals of the two antennas are...
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5731783 |
Method and apparatus for estimating radar signal polarisation
This invention relates to a method and apparatus by which a coarse estimate of radar signal polarisation can be obtained. An array comprises at least three differently directed detectors. The...
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5612702 |
Dual-plane monopulse antenna
A planar edge-slotted and end-fed traveling wave antenna is designed for monopulse operation, with an odd array of parallel elements interleaved with an even array of parallel elements. The even...
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5594448 |
Highly accurate RF-ID positioning system
A balanced receive antenna circuit configuration determines an accurate position of a transponder within the antenna field pattern of the reader antenna. The balanced receive antenna configuration...
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5574461 |
Radar apparatus for connecting to a gun
A radar apparatus provided with a Cassegrain antenna to be mounted on the barrel of a gun. The Cassegrain antenna is of the polarization twist type with a flat adjustable mirror being used to...
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5493303 |
Monopulse transceiver
A dual channel monopulse transceiver is described for use at millimeter wavelengths and for the detection of targets for vehicle collision avoidance. A microstrip antenna is located on one side of...
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5459668 |
Method and apparatus for signal analysis employing a virtual cross-correlation computer
The invention includes an arrangement of actual sensors in an antenna array with a computation of higher-order statistics to provide virtual second order statistics corresponding to virtual...
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5329285 |
Dually polarized monopulse feed using an orthogonal polarization coupler in a multimode waveguide
A dually polarized monopulse feed system for processing radar signal information from a target so the target may be identified and tracked includes a symmetrical multimode input waveguide, a...
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5283588 |
Monopulse tracking apparatus
A monopulse tracking apparatus comprises first to fourth electromagnetic horns disposed symmetrically to each other in an azimuthal direction and elevation direction in a 2×2 matrix state, a first...
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5274384 |
Antenna beamformer
An antenna beamformer is provided for coupling to a circular antenna aperture comprising a plurality of vertical beamformers and four horizontal beamformers coupled to the vertical beamformers so...
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5270718 |
Method and apparatus for tracking targets from direct and multipath reflected radar signals
A method and apparatus to determine angles θ 1 and θ 2 between paths of two sets of reflected radar waves and a radar boresight utilizes the electrical angles β 1 or β 2 and two successive...
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5255004 |
Linear array dual polarization for roll compensation
A planar array of linearly polarized antenna elements, each element tilted so that its polarization orientation is disposed at an angle with respect to the array vertical axis so that array...
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5233359 |
Low difference pattern sidelobe pattern circuit
An antenna distribution network for an antenna array which provides independent sum and difference aperture excitations and enables a reduction in the difference channel radiation sidelobe levels....
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5184136 |
Pulse radar and components therefor
A pulse radar for operation at 94 GHz and higher frequencies is shown to include an antenna, a diplexer and first detector that are each optically fed so that radio frequency signals may be, when...
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5128682 |
Directional transmit/receive system for electromagnetic radiation with reduced switching
A transmit/receive system for electromagnetic radiation, particularly radar, employs an array of active transmit/receive (T/R) modules. Only a portion of the modules are actuated to transmit or...
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5066959 |
Mode coupler for monopulse applications having H.sub.01 mode extracting means
A mode coupler for monopulse applications in an antenna feed system which is used for obtaining angle deviations in azimuth and elevation, and which has a main wave guide in which a plurality of...
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5036332 |
Multi-mode feed system for a monopulse antenna
A monopulse antenna feed system utilizing multiple modes within the feed. A TEM mode and two TE° 11 modes that are orthogonal and in phase quadrature are utilized in the antenna feed system to...
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4983977 |
Architecture for monopulse active aperture arrays
An architecture for a monopulse, active aperture array is provided which functions as a high precision error compensation system correcting both the Sum and the Difference beams simultaneously. The...
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4965732 |
Methods and arrangements for signal reception and parameter estimation
The invention described herein relates generally to the field of signal processing for signal reception and parameter estimation. The invention has many applications such as frequency estimation...
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