Communications: directive radio wave systems and devices (e.g., radar, radio navigation) inventions 06/06

20060139201 - Radio packet communication method: When a transmission rate of each of lines that transmit data simultaneously between two STAs by using a plurality of radio channels and/or MIMO can be set independently, one data frame is fragmented in accordance with the transmission rates of the respective lines so as to generate a plurality of...

20060139202 - Method for evaluating and controlling a radar installation: A method is disclosed for evaluating the terrain surrounding a radar site. The method comprises to calculate the radar horizon around a radar site from stored terrain elevation information. The information obtained can be used for controlling the scanning profile of the radar, by letting the radar scan above the...

20060139203 - Radar detector having function of hands-free device: The present invention relates to a radar detector having the function of a hands-free device, so that it is possible to talk over a mobile phone in a hands-free manner by connecting the mobile phone to the radar detector. The radar detector comprises a horn antenna 100; a signal-processing unit...

20060139204 - Object detection system and method of detecting object: An object detection system is provided with radar detection means (2), image detection means (3), and collating means (4). The collating means (4) detects a combination of an object detected by the radar detection means (2) and an object selected among those detected by the image detection means (3), which...

20060139205 - Method for controlling a radar antenna: A method is described for detecting an object with target radar. After the first detection of an object, the antenna is tilted. The original direction towards the object is restored by electronically steering the emitted beam. The beamsteering is obtained by changing the frequency of the emitted signal. Thus, the...

20060139206 - Velocity sensor and ground vehicle velocity sensor using the same: There is provided a highly accurate velocity sensor having a reduced detection error. A sensor circuit unit generates an electromagnetic wave and emits it from a transmission antenna. Furthermore, a reception antenna receives a reflection wave from the ground and a mixer mixes it with a local signal, thereby generating...

20060139207 - Non-blocking switch having carbon nanostructures and mach-zehnder interferometer: In embodiments of the present invention, a non-blocking quantum interference switch includes a segmented electron wave coupler that splits an electron wave and couples its two parts to two arms of a Mach Zehnder interferometer. A voltage may be applied to an interferometer gate electrode to change the phase of...

20060139208 - Gps.wifi terminal: A terminal, in particular a mobile terminal, comprises means for processing a positioning signal coming from a satellite positioning system, means for computing direct and inverse Fourier transforms, wireless communication means using OFDM modulation, and priority management means for assigning resources of the direct/inverse Fourier transform computation means either to...

20060132348 - Method for detecting the presence of radar signal emitters, an electronic support measures unit and a system for determining the position and identity of said emitters: A method for passively detecting the presence of radar signal emitters, in which an ESM unit receives radar signals with a number of antennas, each antenna covering a sector of the surrounding terrain. In order to conserve bandwidth, a technique is used, in which receiving channel is slit into a...

20060132349 - Radar detector with signal source location determination and filtering: A radar detector and location unit includes at least three sensors configured to detect a radar signal, at least three sensors being aligned in a non liner arrangement; a position receiver configured to determine a position of the radar detector; a data storage device configured to store data related to...

20060132350 - Short-range automotive radar transceiver: Automotive vehicle including a radar transceiver each including a heterodyne active IMPATT multiplier module arranged to receive a signal from a VCO, a first balance mixer arranged to receive a signal from a VCO, a second balance mixer arranged to receive a signal from a receive antenna and the IMPATT...

20060132351 - Method for measuring material level in a container using rfid tags: A level of liquid of pulverent solids in a container (or volume of a liquid in the absence of gravity) is detected by using radio frequency identification (RFID) tags or similar transponders located inside or outside the container. The interrogation signal and/or the return signal is attenuated by the material...

20060132352 - Near field location system and method: Near field signal properties are used to determine a location by utilizing two magnetic antennas arranged so that the null axes are perpendicular and lie in a plane of interest, such as the horizontal plane. The two antennas may be used as transmitting antennas or receiving antennas. The antennas may...

20060132353 - Apparatus for detecting direction of target using difference in phase of radio wave signals received through plural channels: An apparatus for detecting a direction of a target is provided. The apparatus transmits and receives radio waves through a plurality of transmission/reception channels causing a phase difference in signals to be received through the transmission/reception channels and calculates the direction based on the phase difference. The apparatus comprises a...

20060132354 - Method of detecting a target: A method for processing returns from a sensor, such as a radar system, in order to identify targets is provided. The method uses a track before detect routine to integrate data from several scans in order to give better discrimination. In running the track before detect routine however a number...

20060132355 - Radio frequency anechoic chamber with nonperturbing wireless signalling means: An anechoic chamber (100) is provided with a system for introducing wireless communication signals into the anechoic chamber (100) for establishing wireless signaling with equipment under test (122), without interfering with signals from the equipment under test (122) that are to be measured in the anechoic chamber (100). The system...

20060132356 - Method and device for determining the state of travel of a vehicle: A method and a device for determining the state of travel, whether stationary or moving along, of a vehicle. The method includes equipping at least one wheel (2) with a magnetic sensor (4) having an axis of maximum sensitivity, measuring a signal at the terminals of the magnetic sensor (4)...

20060132357 - System and technique for calibrating radar arrays: A system and technique for calibrating a plurality of radars provides a set of simultaneous equations derived from monostatic echo returns from a plurality of targets. A solution of the simultaneous equations provides relative position calibration factors and time delay calibration factors associated with the plurality of radars. The relative...

20060132358 - Determining a predicted performance of a navigation system: In one aspect, a method for determining a predicted performance of a navigation augmentation system includes determining a normal performance of the navigation augmentation system and determining a predicted performance of the navigation augmentation system based on determining the normal performance. In another aspect, a system for determining a predicted...

20060125679 - Image processing system for mounting to a vehicle: An image processing system to be mounted to a vehicle includes a radar adapted to measure distance and direction to an object based on reflected electromagnetic waves which are outputted to scan the exterior of the vehicle, an image-taking device such as a camera for obtaining an image, and an...

20060125680 - Method and system for detecting an object using a composite evidence grid: A method and system for detecting an object uses a composite evidence grid based on dual frequency sensing. A source transmits a laser transmission in a first zone. A detector receives a reflection of the laser transmission from an object in the first zone to determine laser observed data associated...

20060125681 - Indefinite materials: A compensating multi layer material includes two compensating layers adjacent to one another. A multi-layer embodiment of the invention produces subwavelength near-field focusing, but mitigates the thickness and loss limitations of the isotropic “perfect lens”. An antenna substrate comprises an indefinite material....

20060125682 - System and method for reducing a radar interference signal: A system and method are provided to reduce an interfering signal in a radar return signal for a frequency modulated continuous wave (FMCW) radar. Once the interfering signal is detected, an extent of the interfering signal is determined and the interfering signal is removed from the radar return signal. This...

20060125683 - Radar sensor and method for operating a radar sensor: In a radar sensor, a continuous microwave signal is passed through an RF switch which is periodically controlled by a pulse signal. The pulse signal is frequency modulated in such a way that the spectrum of the pulse signal is expanded without decorrelation occurring. Using this arrangement, the noise level...

20060125685 - Agps system using ntp server and method for determining the location of a terminal using a ntp server: Disclosed is a method for determining the location of a terminal in an AGPS system in a wireless LAN using AGPS data provided from a PDE (position determination entity) and time information provided from a NTP (network time protocol) server....

20060125684 - Reception of signals in a device comprising a transmitter: A device 1 comprises a communication system transmitter 30 for transmitting signals via a radio interface in a first frequency band. The device further comprises a receiver 10 for receiving signals via a radio interface in a second frequency band. The receiver 10 includes an attenuating component 13 for attenuating...

20060125686 - Technique for determining relative yaw using phase windup: A technique uses “phase windup” to determine relative yaw of a craft from a plurality circularly polarized signals transmitted from one or more transmission sources. A first difference in carrier phase measurements taken simultaneously at time t1 is determined for first and second circularly polarized signals from a given transmitting...

20060125687 - Distributed exciter in phased array: A wideband multi-signal distributed exciter system for use with a phased antenna array is disclosed. The system includes a multi-signal generator that is configured with a dual direct digital frequency synthesizer (DDS) core, and is capable of generating multi-polarization signals over a given frequency range (e.g., 50 to 500 MHz)...

20060125688 - Bit depth reduction for analog to digital conversion in global positioning system: Disclosed is a system and method for reducing a bit-depth requirement for an A/D converter in a GPS receiver having an antenna for receiving an analog input signal and a low noise amplifier for amplifying the input signal, comprising a filter for filtering about a bandwidth B the amplified signal;...

20060125689 - Interference cancellation in a receive diversity system: Systems and methods for employing substantial interference cancellation with a receive-diversity system are presented. A Coded Signal Processing Engine (“CSPE”) is communicatively coupled to each receiver chain of a receive-diversity system and is configured for substantially canceling one or more interfering signals from a digital baseband signal of one or...

20060125690 - Methods and apparatus for identifying asset location in communication networks: The location of unmodified wireless assets in a wireless communication network may be identified using time differences of arrivals of a communication sequence at different network receivers. Time-stamping devices may include correlator circuits in parallel with signal decoders to time-stamp communication sequences. Cellular wireless networks may be frequency-multiplexed to increase...

20060125691 - Radio frequency tags for use in a motion tracking system: Small radio frequency tags for use in a motion capture system include a power source, circuitry for generating radio frequency identification signals, an antenna for transmitting the signals, and means for automatically activating the tags so that the tags begin transmitting the signals including a tag identification code when a...

20060125692 - Systems and methods for geographic positioning using radio spectrum signatures: Methods, radios, components thereof, and other devices for localizing a geographic position of a radio receiver are provided. A current radio signature is obtained. The current radio signature comprises a plurality of measured signal qualities that collectively represent a frequency spectrum. Each measured signal quality in the plurality of measured...

20060125693 - Determining a position of at least one beacon in a location system: A position for a beacon in a location system is determined based on distances measured from positions in a local coordinate system for the location system and from intersection points of circles. The circles each have a center point of one of the positions in the local coordinate system and...

20060125694 - Location determination method and system for asset tracking devices: A method of determining a geographical location of an asset tracking device, includes searching, by the asset tracking device, for available location determination schemes at the geographical location, selecting one of the available location determination schemes, and determining coordinates of the geographical location using the selected location determination scheme. Some...

20060125695 - System and method for enhancing the accuracy of a location estimate: A method for enabling a system to enhance the accuracy of a location estimate modifies weights in a weight matrix associated with receiver station measurements in parallel with successive refinements of the location estimate. In a typical location estimation scenario, several receiving stations simultaneously derive measurements of a signal from...

20060114145 - Location identification: The location of a mobile terminal may be determined in response to signals received from a plurality of RFIDs. Information from a plurality of RFIDs for determining a location of a mobile terminal is received by the mobile terminal. The mobile terminal may maintain an in-range list that comprises all...

20060114146 - Multi-targeting method and multi-targeting sensor device for locating short-range target objects in terms of distance and angle: A multi-targeting method for locating short-range target objects in terms of distance and angle. The method includes the following steps: a) a characteristic signal is emitted by a transmitting antenna of a first sensor element; b) the reflected characteristic signal is received by at least two adjacent reception antennae of...

20060114147 - Calibration method, device and computer program: A method for calibrating parameters of sensor elements in a sensor array. The method comprises receiving an output signal of at least two sensor elements signal in reaction to an input signal from a signal source; estimating a cross-correlation between the output signals of at least two of said sensor...

20060114148 - Robust optimal shading scheme for adaptive beamforming with missing sensor elements: A new technique for re-computing shading parameters for low sidelobe levels for a radar or sonar system is disclosed. When some of the sensor elements become inoperative, remaining shading parameters are recomputed using a new constraint. This approach leads to an overall gain pattern that is superior compared to the...

20060114149 - Apparatus for controlling antenna in stratospheric platform and stratospheric platform system having the same: Provided is an antenna control apparatus for controlling an antenna mounted on a stratospheric platform of the stratospheric communication system. The apparatus includes a plurality of location signal receivers, each receiver being positioned at each of predefined different points of the stratospheric platform and receiving a location signal for the...

20060114150 - Method and apparatus for monitoring the integrity of satellite tracking data used by a remote receiver: A method and apparatus for monitoring the integrity of satellite tracking data used by a remote receiver is described. In one example, a first set of satellite tracking data is received at a server. Integrity data for a second set of satellite tracking data is generated using the first set...

20060114151 - Gps receiver: A GPS receiver calculates a position with as high accuracy as possible by appropriately setting a threshold of a reception level of the signal from each GPS satellite and a DOP threshold based on an interrelation between the satellites. A positioning calculator performs predetermined positioning calculation using a reception signal...

20060114152 - Method to eliminate pll lock-up during power up for high frequency synthesizer: A method and apparatus to eliminate PLL lock-up during power-up for a VCO. A method in accordance with the present invention comprises coupling a divider to a Voltage Controlled Oscillator (VCO) to create the feedback loop, and driving the divider with a signal, wherein the signal from the VCO is...

20060114153 - Culled satellite ephemeris information based on limiting a span of an inverted cone for locating satellite in-range determinations: Locating satellites (e.g., GPS) are culled into a sub-plurality based largely on dwell time within an inverted cone above a relevant site in communication with a wireless device. A first inverted cone having a first base angle is defined above a first site, a second inverted cone having a second...

20060114154 - Smart antenna, method and apparatus for adaptive beam forming: The present invention discloses a beam forming method for a smart antenna and a beam forming apparatus for a smart antenna. Said method comprises: implementing pre-multibeam processing and time delay aligning to array signals; calculating a suboptimum weight by means of a pilot frequency symbol; iteratively calculating an optimum weight...

20060114155 - Reduction of near ambiguities: The method is characterised in that a number of antenna elements (2′) are switched off or reduced during different times and that the corresponding radiation diagrams for the different times are added to each other such that a sum radiation diagram is produced. The invention also refers to an antenna...

20060114156 - Mobile satellite receiver system: A system includes a first antenna that is located on one side of a motor vehicle and a second antenna that is located on another side of the motor vehicle. The system includes a controller, a switch and a receiver. In response to a heading of the motor vehicle, the...

20060114157 - Precision geolocation system and method using a long baseline interferometer antenna system: A long baseline interferometer antenna system and method for determining the location of an emitter. The long baseline interferometer antenna system comprises a first antenna, a second antenna, an inertial navigation system, an antenna baseline measurement system, a multi-channel receiver and a processor. The first and second antenna elements are...

20060114158 - Wireless communication method and antenna system for determining direction of arrival information to form a three-dimensional beam used by a transceiver: A wireless communication method and antenna system for determining the direction of arrival (DOA) of received signals in azimuth and elevation, (i.e., in three dimensions), to form a beam for transmitting and receiving signals. The system includes two antenna arrays, each having a plurality of antenna elements, two first stage...