Did You Know...
...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7317916 | Stratospheric-based communication system for mobile users using additional phased array elements for interference rejection A communication system has a stratospheric platform with a payload controller and a phased array antenna having a plurality of main array elements for generating a plurality of communication beams and a plurality of auxiliary elements for canceling interference betw... | 01/08/2008 |
| 7289389 | Resolving directional information in sonar arrays The invention concerns the resolution of directional information in sonar arrays. In particular it concerns a method for resolving such directional information, which may be useful in hydrographic surveys. The method comprises the steps of receiving a block of senso... | 10/30/2007 |
| 7283101 | Antenna element, feed probe; dielectric spacer, antenna and method of communicating with a plurality of devices A multiband base station antenna for communicating with a plurality of terrestrial mobile devices is described. The antenna including one or modules, each module including a low frequency ring element; and a high frequency dipole element superposed with the low freq... | 10/16/2007 |
| 7231151 | Cosite interference rejection system using an optical approach A cosite interference rejection system allows cancellation of large interfering signals with an optical cancellation subsystem. The rejection system includes an interference subsystem coupled to a transmit system, where the interference subsystem weights a sampled t... | 06/12/2007 |
| 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 part of a transmit signal is supplied to respective channels on the rece... | 05/01/2007 |
| 7206561 | Radio equipment A radio equipment, wherein an attenuator (10) is inserted between antennas (91, 92) and a radio module (2), and output and input sensitivities are raised and lowered simultaneously so as to keep the balance of a radio covering range with an inpu... | 04/17/2007 |
| 7190746 | Multiple lobe dot product detector for M-code GPS receivers A positioning system receiver is disclosed. The positioning system receiver includes an antenna for receiving radio frequency (RF) signals. The positioning system receiver also includes a radio frequency front end system configured to convert the received RF signals... | 03/13/2007 |
| 7183974 | Methods and apparatus for increasing the effective resolving power of array antennas Methods and apparatus for improving the effective resolving power of an array antenna are described that are not limited by the physical characteristics of the array. In an array with M elements, up to M−1 directional vectors may be selected, preferably at angles ... | 02/27/2007 |
| 7158773 | Noise reduction device and wireless LAN base station apparatus using the device A wireless LAN base station is provided with a noise signal scanning antenna separately from a wireless signal reception antenna. An attenuation circuit section attenuates the received signal from the noise scanning antenna according to an attenuation factor from an... | 01/02/2007 |
| 7130663 | Adaptive beam forming using a feedback signal Transmitting apparatus (10) for transmitting a transmission signal to a receiving apparatus (12) is described. The transmitting apparatus (10) comprises means (30, 32, 34) for transmitting to the receiving apparatus a plurality of transmi... | 10/31/2006 |
| 7127218 | Scanning antenna diversity system for FM radio for vehicles A scanning antenna diversity system for mobile FM radio having an antenna system with controllable logic switch, wherein a different high-frequency reception signal is passed to a receiver. An IF signal turns on a diversity processor, which switches the logic switch... | 10/24/2006 |
| 7126526 | Phased null radar A method for reducing the interference between a source transmitting pulses and equipments having nominal bandwidths which are outside the nominal bandwidth of the transmitted pulses, but which respond to sideband energy of the pulses. Phase perturbations are applie... | 10/24/2006 |
| 7117018 | Array beamforming with wide nulls A method and implementation of wireless communication are disclosed in which wireless signals are exchanged between at least one remote client and a directional antenna array associated with a wireless network, wherein the directional antenna array includes a plural... | 10/03/2006 |
| 7103384 | Apparatus and method for forming a forward link transmission beam of a smart antenna in a mobile communication system A method and apparatus for a base station including an antenna array calculates a direction of a weight vector of a transmission beam to maximize in-phase component power for a common channel signal in a transmission channel signal for transmission to a mobile stati... | 09/05/2006 |
| 7095358 | Technique for cancellation of elevated clutter for the detection of fixed and ground moving targets under trees A target is detected under a forest canopy or other elevated clutter where the target is obscured by the elevated clutter. Radar returns reflected from the target on the surface, combined with those from the elevated clutter are digitized. Motion compensation is per... | 08/22/2006 |
| 7039099 | Demodulation apparatus and demodulation method for mobile communication A path timing comparing section compares correlation peak values and their path timings detected from a delay profile with correlation peak values and their path timings assigned to fingers in the previous cycle. If a path timing determining section determines from ... | 05/02/2006 |
| 7019692 | System and method for narrowband pre-detection signal processing for passive coherent location applications A system and method for narrowband pre-detection signal processing in passive coherent location applications is disclosed. A receiving subsystem receives a reference signal and a target signal from an uncontrolled transmitter. The target signal is reflected from a t... | 03/28/2006 |
| 7010055 | System implementing closed loop transmit diversity and method thereof A method of and apparatus for adapting an antenna array for closed loop transmit diversity, the method comprising: receiving an adapting signal corresponding to an antenna array weighting pattern for a time period; demodulating the adapting signal to provide a symbo... | 03/07/2006 |
| 6970722 | Array beamforming with wide nulls A method and implementation of wireless communication are disclosed in which wireless signals are exchanged between at least one remote client and a directional antenna array associated with a wireless network, wherein the directional antenna array includes a plural... | 11/29/2005 |
| 6937183 | Object detecting method and object detector Beams are irradiated in three directions by switching an irradiation direction of a mainlobe of an antenna by stages, and an echo is received from a detection object obtained in the mainlobe or a sidelobe in each irradiation direction. Then, reflection power intensi... | 08/30/2005 |
| 6653969 | Dispersive jammer cancellation Generating a secondary beam (11) slightly offset from the main data collection beam (9) and obtaining hot clutter reference to be used in a conventional side lobe jammer processing algorithm (31). Advantage is taken of the typical geometries of a standoff... | 11/25/2003 |
| 6639551 | Method of interference cancellation based on smart antenna This invention discloses an interference cancellation method based on smart antenna, which can solve various interference in mobile communication systems such as multipath propagation, etc., while using smart antenna. The invention includes the steps of: ... | 10/28/2003 |
| 6473596 | Close proximity transmitter interference limiting A weaker signal receiving system inclusive of stronger nearby-sourced interference signal cancellation capability. Stronger interference signal cancellation is accomplished by actively canceling or subtracting from the received signal an intermediate sign... | 10/29/2002 |
| 6404821 | Digital beamformer for receiving a first number of information signals using a second number of antenna array elements A digital beamforming network for transmitting a first number of digital information signal using a second number of antenna array elements is disclosed. Assemblers are used for assembling one information bit selected from each of the information signals ... | 06/11/2002 |
| 6397083 | Bootstrapped, piecewise-asymptotic directivity pattern control mechanism setting weighting coefficients of phased array antenna Weighting coefficients for a phased array antenna are iteratively refined to optimal values by a `bootstrapped` process that starts with a coarse set of weighting coefficients, to which received signals are subjected, to produce a first set of signal esti... | 05/28/2002 |
| 6297772 | Predicting coherent sidelobe canceller A system for instrumenting time sampled predicting interference suppression, particularly in a side-lobe canceller system. Main and auxiliary channel signals are supplied to a canceller loop where correlating weights are sampled just prior to a radar puls... | 10/02/2001 |
| 6226531 | High capacity broadband cellular/PCS base station using a phased array antenna A high capacity broadband base station employs a wideband radio and phased array processing subsystem. This phased array antenna subsystem contains multiple sets or pairs of alternating receive only and transmit/receive elements distributed in a two dimen... | 05/01/2001 |
| 6188915 | Bootstrapped, piecewise-asymptotic directivity pattern control mechanism setting weighting coefficients of phased array antenna Weighting coefficients for a phased array antenna are iteratively refined to optimal values by a `bootstrapped` process that starts with a coarse set of weighting coefficients, to which received signals are subjected, to produce a first set of signal esti... | 02/13/2001 |
| 6166689 | Adaptive beamformer with beam mainlobe maintenance An adaptive beamformer and signal processor for sonar and other signal receptor arrays, in which beamforming is accomplished by correlation feedback loops providing matched weighting across the array. To constrain the adaptive beamformer thus comprised ag... | 12/26/2000 |
| 6061016 | Method for the attenuation of the clutter coming from the reflection lobes of a radar antenna The disclosed method uses the ancillary antennas of a radar, and consists in determining the positions of the phase centers of these ancillary antennas, compensating for the difference in optical path between the reflection lobe of the processed channel a... | 05/09/2000 |
| 5952965 | Adaptive main beam nulling using array antenna auxiliary patterns Without use of separate auxiliary antennas, adaptive nulling automatically reduces jamming or other interference affecting a radar or IFF system. A primary beam forming network utilizes four-port directional coupler devices, each having an ancillary port ... | 09/14/1999 |
| 5694133 | Adaptive direction finding system This invention relates to automatic direction finding methods and systems for an electromagnetic or acoustic signal source by utilizing the concept of adaptive nulling of a narrow or wideband signal received by one sensor from the same signal received by ... | 12/02/1997 |
| 5502448 | Method and means for short pulse interference rejection A radar interference circuit which rejects both continuous noise and shorulse interference signals. A plurality of omni-directional antennas are placed around the main directional radar antenna and connected in differing sets to a plurality of canceller ... | 03/26/1996 |
| 5493307 | Maximal deversity combining interference cancellation using sub-array processors and respective delay elements A sidelobe canceler includes a main antenna, an array of sub-antennas, a subtractor having a first input connected to the main antenna, a main-array processor and M sub-array processors. The main-array processor multiplies the outputs of the sub-antennas ... | 02/20/1996 |
| 5442365 | Technique for processing interference-contaminated radar energy A technique for improving sidelobe canceller performance by blocking the canceller output signal upon sensing reduced main channel interference accompanied by an increased sidelobe canceller output. Two signal processing networks form the difference betwe... | 08/15/1995 |
| 5371506 | Simultaneous multibeam approach for cancelling multiple mainlobe jammers while preserving monopulse angle estimation accuracy on mainlobe targets An improvement in monopulse radar achieves nulling of multiple mainlobe jammers while maintaining the angle measurement accuracy of the monopulse ratio by using multiple simultaneous beams, thereby obtaining the additional degrees of freedom necessary for... | 12/06/1994 |
| 5369412 | Sidelobe cancellation and diversity reception using a single array of auxiliary antennas In a sidelobe canceller, a main channel multiplier (11) operates on the baseband output signal of a main antenna (10) with a weight signal to produce a weighted main channel signal. The baseband output signals of auxiliary antennas (161 ~16 | 11/29/1994 |
| 5363104 | Jamming signal cancellation system Improved radar system performance in a jamming environment is achieved by detecting the AM difference frequency produced by the beating of the desired radar signal with the jamming signal and applying same to one input of a balanced modulator while simult... | 11/08/1994 |
| 5361074 | Mainlobe canceller system An interference suppression system for cancelling undesired signals recei through the mainlobe of an antenna as well as its sidelobes. The interference suppression system has a main channel input having high gain for receiving desired signals and undesir... | 11/01/1994 |
| 5361073 | Determination of jammer range and azimuth by use of a coherent side lobe canceller system An improved countermeasure detection system and technique for determining e range and azimuth of a noise jammer in a radar environment. A signal limiter is inserted into the output loops of a conventional multi-loop side-lobe canceller system such that th... | 11/01/1994 |
