Patents Assigned to Integrated Systems
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Publication number: 20090324205Abstract: Systems and methods for determining the occurrences of pulses for implementing a pulse count monitoring method for driving a brushed DC motor driven by a pulse width modulated (PWM) driving current. The method comprises acquiring the driving current signal; performing peak detection on the acquired signal; identifying the largest peaks and thus determining the occurrence of pulses. The peak detect is implemented by fast peak detection or diode peak detection operable to detect appropriate peak widths as determined by the chosen PWM frequency, duty cycle and PWM pulse height.Type: ApplicationFiled: February 25, 2009Publication date: December 31, 2009Applicant: MELEXIS NV Microelectronic Integrated SystemsInventors: Marc Lambrechts, Jerome Degois
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Patent number: 7626546Abstract: Systems and methods for detection and geolocation of multiple emitters that are emitting RF signal energy on a common frequency, and that may be implemented to separate, geolocate, and/or determine the number of emitters (e.g., radio users) emitting on a common RF frequency. Real-time signal qualification processing may be employed to continuously monitor and collect incoming receiver tuner data for signal activity and ignore irrelevant noise data. Each set of data blocks from an emitter transmission signal may be defined as an emission cluster, and a set of time difference of arrival (TDOA)/frequency difference of arrival (FDOA) pairs may be computed for each emission cluster with each TDOA/FDOA pair yielding a geolocation result. A statistical qualification method may be used to produce a final geolocation answer from each set of emission cluster geolocation results, and a geolocation error ellipse computed for the final geolocation answer of each emission cluster.Type: GrantFiled: September 27, 2007Date of Patent: December 1, 2009Assignee: L-3 Communications Integrated Systems L.P.Inventors: Hyo K. Chung, Phuong H. Le, John M. Parker, David L. Reid, Mark A. Robertson
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Patent number: 7623591Abstract: A diversity receiver includes N number of Fourier transform circuits, N number of channel estimators, N number of match filters, N number of soft demappers, a combination/selection unit, and a channel decoder. The diversity receiver merges the square of the absolute value of estimate channel frequency response and transmission data into a demodulation signal and then outputs the demodulation signal by means of the match filter.Type: GrantFiled: June 30, 2006Date of Patent: November 24, 2009Assignee: Silicon Integrated Systems Corp.Inventors: Ya-Ti Tseng, Wen-Sheng Hou
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Patent number: 7603656Abstract: Methods and systems for modeling concurrent behavior in a sequential programming environment using sequential-execution languages to describe and model multiple different processes which are running simultaneously.Type: GrantFiled: January 14, 2005Date of Patent: October 13, 2009Assignee: L-3 Communications Integrated Systems L.P.Inventors: Yea Zong Kuo, Jerry W. Yancey
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Patent number: 7603095Abstract: The present invention provides a way of hysteretic switching for efficiently reducing the heavy switching between two adjacent coarse intervals. The present invention disposes a number of fine intervals to cover a range which is larger than the length of one coarse interval. Each coarse interval comprises some extra fine intervals which are exceeded the boundary of the coarse intervals in one side. The heavy switching will be postponed until the extra fine intervals are used up. In the meantime, the fine calibration unit records the number of extra fine interval which be used. An extra-boundary value will be recorded in the fine calibration unit for determining an initial fine interval in another coarse interval if the heavy switching occurs. It should be noted that the extra-boundary value could be a positive or minus value corresponding to which a forward coarse interval or a backward coarse interval the reference signal drifts into.Type: GrantFiled: February 17, 2006Date of Patent: October 13, 2009Assignee: Silicon Integrated Systems Corp.Inventors: Chia-hao Yang, Chia-jung Liu
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Publication number: 20090241643Abstract: Tire pressure monitoring system for a vehicle includes sensor units mounted in each tire of the vehicle, each sensor unit being operable to output an RF signal indicative of the pressure in the tire in which it is mounted; a pair of communicator units for receiving signals from said sensor units, said pair of communicator units being provided at different locations on the vehicle; and a control unit connected to said communicator units wherein said control unit is operable to determine which sensor unit is associated with which tire by monitoring the strength of the RF signal received from each respective sensor unit by each communicator unit.Type: ApplicationFiled: September 15, 2006Publication date: October 1, 2009Applicant: Melexis NV Microelectronic Integrated SystemsInventor: Dirk Leman
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Patent number: 7593472Abstract: System performance in wireless communication is improved by increasing diversity in time, space and frequency. In OFDM-based MIMO systems in which the number of antennas M is greater then the number of simultaneously transmitted OFDM symbols N, circulation transmissions according to the present invention improve signal diversity. In symbol-based circulation transmission, N antennas are chosen from the M available antennas to transmit the N OFDM symbols. In subcarrier-based circulation transmission, M output OFDM symbols are composed from the QAM-mappled samples of the N input OFDM symbols. These M output OFDM symbols are then transmitted from the M antennas simultaneously.Type: GrantFiled: October 6, 2005Date of Patent: September 22, 2009Assignee: Integrated System Solution Corp.Inventors: Jeng-Hong Chen, Pansop Kim
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Patent number: 7590209Abstract: A system for identifying phase transitions in phase-shift keying signals and frequency transitions in frequency-shift keying signals broadly comprises a memory and a computing element capable of: selecting a portion of the signal to analyze, wherein the signal comprises a plurality of data samples; applying a transform to the signal to obtain a frequency spectrum; determining a maximum frequency spectrum corresponding to a carrier frequency; determining a starting approximation value of a slope of the phase transition; calculating a bounded limit of slopes within which to search for the phase transition; selecting a plurality of lines, calculating a sum for the data samples associated with each of the lines; and based on the sum for the data samples, identifying a line that corresponds to a location of the phase transition.Type: GrantFiled: December 30, 2005Date of Patent: September 15, 2009Assignee: L3 Communications Integrated Systems L.P.Inventor: Stephen Ha
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Publication number: 20090228628Abstract: An architecture for providing data communication between a plurality of field-programmable gate arrays (FPGAS) and a multi-channel data bus comprises a plurality of FPGAs, a switching element, and a multi-channel data bus. Each FPGA includes a multi-channel endpoint component to enable communication with at least a portion of the multi-channel data bus. The switching element couples each FPGA endpoint component with the multi-channel data bus, allowing communication between the FPGA endpoint components and the data bus such that every channel of the data bus is coupled to a channel of an FPGA endpoint component.Type: ApplicationFiled: March 6, 2008Publication date: September 10, 2009Applicant: L3 Communications Integrated Systems, L.P.Inventor: Matthew R. Standfield
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Patent number: 7587441Abstract: Systems and methods for providing a weighted overlap and add (WOLA) architecture and/or for providing polyphase WOLA FFT processing that may be employed, for example, for separation or channelization of closely-spaced frequencies of an input signal. A WOLA architecture that may be implemented as first-in-first-out (FIFO) cores in an FPGA or ASIC device. The FIFO cores may be pre-existing (e.g., provided as free FIFO cores in a commercial off the shelf (COTS) FPGA device) or may be custom-programmed into a custom ASIC device.Type: GrantFiled: June 29, 2005Date of Patent: September 8, 2009Assignee: L-3 Communications Integrated Systems L.P.Inventors: Jerry W. Yancey, Yea Z. Kuo
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Publication number: 20090207056Abstract: A method of resampling a digital signal involves serially receiving a plurality of samples of said digital signal and applying a plurality of filter coefficients to a first subset of the plurality of samples to generate a first plurality of intermediate results and to a second subset of the samples to generate a second plurality of intermediate results. The first plurality of intermediate results is accumulated to generate a first resampled value, and the second plurality of intermediate results is accumulated to generate a second resampled value. Upon receipt, each signal sample may be used to update each of a plurality of running accumulation values and then discarded before receipt of a next signal sample. Furthermore, multiple signals may be resampled concurrently using a single filter path by multiplexing circuit components, such as memory blocks.Type: ApplicationFiled: April 20, 2009Publication date: August 20, 2009Applicant: L3 Communications Integrated Systems, L.P.Inventor: Scott Fornero
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Patent number: 7561077Abstract: A method of resampling a digital signal involves serially receiving a plurality of samples of said digital signal and applying a plurality of filter coefficients to a first subset of the plurality of samples to generate a first plurality of intermediate results and to a second subset of the samples to generate a second plurality of intermediate results. The first plurality of intermediate results is accumulated to generate a first resampled value, and the second plurality of intermediate results is accumulated to generate a second resampled value. Upon receipt, each signal sample may be used to update each of a plurality of running accumulation values and then discarded before receipt of a next signal sample. Furthermore, multiple signals may be resampled concurrently using a single filter path by multiplexing circuit components, such as memory blocks.Type: GrantFiled: December 28, 2007Date of Patent: July 14, 2009Assignee: L3 Communications Integrated Systems, L.P.Inventor: Scott Fornero
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Publication number: 20090175181Abstract: The present invention discloses an effective apparatus and method to measure the received signal quality for digital communication systems by measuring error vector measurement (EVM) with embedded EVM measurement block in receivers. The distinction of the present invention is that the EVMSIG and the EVMDATA are measured in the receiver for the SIGNAL fields and DATA fields, respectively. EVMSIG is a good indicator for one spatial stream and EVMDATA is a good indicator for current multiple streams. The receiver determines the optimum number of spatial data streams for feedback to the transmitter based on the combinations of EVMSIG and EVMDATA with or without other algorithms such as analysis on periodically requested sounding packet. The receiver also determines the optimum modulation and coding schemes for feedback based on the EVM measurements.Type: ApplicationFiled: January 8, 2008Publication date: July 9, 2009Applicant: Integrated System Solution Corp.Inventors: Pansop KIM, Jeng-Hong Chen
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Publication number: 20090178043Abstract: A computing architecture comprises a plurality of processing elements to perform data processing calculations, a plurality of memory elements to store the data processing results, and a reconfigurable interconnect network to couple the processing elements to the memory elements. The reconfigurable interconnect network includes a switching element, a control element, a plurality of processor interface units, a plurality of memory interface units, and a plurality of application control units. In various embodiments, the processing elements and the interconnect network may be implemented in a field-programmable gate array.Type: ApplicationFiled: January 3, 2008Publication date: July 9, 2009Applicant: L3 Communications Integrated Systems, L.P.Inventors: Deepak Prasanna, Matthew Pascal DeLaquil
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Publication number: 20090175158Abstract: A data coding/decoding system for use with a plurality of users includes an encoder, a transmitter, a receiver, and a decoder. The encoder encodes data to be transmitted over a shared physical transmission medium using an orthogonal or convolution code associated with a receiving user. The transmitter transmits the encoded data. Generally, data may be transmitted simultaneously by a plurality of users. The receiver receives a stream of encoded data and forwards it to the decoder, which decodes it based on the orthogonal or convolution code of the receiving user.Type: ApplicationFiled: January 3, 2008Publication date: July 9, 2009Applicant: L3 Communications Integrated Systems, L.P.Inventor: Kenneth Shamburger
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Patent number: 7555834Abstract: Methods of manufacture of interconnection devices that include using a non-forming process to manufacture a plurality of compression contacts, each compression contact including a cantilevered beam portion that is tapered along its length, and disposing each of the plurality of contacts within a respective cavity in a substantially planar carrier housing lying in a plane defined by x and y axes, the housing having an upper surface and a lower surface, each cavity extending between the upper and lower surfaces of the housing substantially along a z axis, each contact being loosely retained within its respective cavity such that an entirety of the contact in a compressed state has at least some freedom of movement along the x and y axes.Type: GrantFiled: December 5, 2006Date of Patent: July 7, 2009Assignee: Integrated System Technologies, LLCInventor: Michael N. Perugini
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Patent number: 7558536Abstract: A sensor for obtaining vehicular traffic data is described. The sensor includes a housing having a front surface. The sensor also includes an antenna plate having an antenna ground surface and a radiating surface. The antenna plate is disposed within the housing for transmitting radiation to a vehicle through the front surface and for receiving the radiation reflected back from the vehicle through the front surface. A transceiver circuit plate is disposed within the housing for electrically driving the antenna plate. The transceiver circuit plate has a component side for supporting circuit components and a circuit ground side for grounding the circuit components. The antenna ground surface is between the radiating surface and the transceiver circuit plate. A processor unit drives and processes electrical signals from the transceiver circuit plate to obtain vehicular traffic data.Type: GrantFiled: July 18, 2005Date of Patent: July 7, 2009Assignee: EIS Electronic Integrated Systems, Inc.Inventor: Dan Manor
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Patent number: 7556206Abstract: Embodiments of the present invention provide a temperature compensating circuit. The circuit generally includes a clock element operable to provide an adjustable clock signal, a buffer element coupled with an analog-to-digital converter and operable to receive the adjustable clock signal, a temperature sensor operable to sense a temperature, and a logic element coupled with the clock element and the temperature sensor. The logic element is operable to acquire the temperature from the temperature sensor and adjust the clock signal based upon the acquired ambient temperature. Such a configuration compensates for temperature variations and reduces system complexity and required component space, thereby providing a compact and efficient design.Type: GrantFiled: January 30, 2006Date of Patent: July 7, 2009Assignee: L3 Communications Integrated Systems, L.P.Inventor: Mark A. Chivers
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Publication number: 20090169095Abstract: A system and method for illuminating an object in preparation for three-dimensional rendering includes a projection device configured to project at least three two-dimensional structured light patterns onto a 3-dimensional object. At least two cameras detect light reflected by the object in response to the at least three structured light patterns. Each structured light pattern varies in intensity in a first dimension and is constant in a second dimension. A single line along the first dimension of a given structured light pattern is created from a superposition of three or more component triangular waveforms. Each component triangular waveform has an amplitude, a periodicity (frequency), and a phase shift which is implemented as a pixel shift. Each component triangular waveform may be subject to one or more waveshaping operations prior to being summed with the remaining component triangular waveforms. The summed waveform itself may also be subject to waveshaping operations.Type: ApplicationFiled: January 2, 2008Publication date: July 2, 2009Applicant: Spatial Integrated Systems, Inc.Inventors: Ping Zhuang, Leslie Ray Elkins
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Patent number: 7554557Abstract: An image compression device includes a floating-point texture-loading unit, a shader, a RGB to YCrCb compressor, and a parameter adjusting unit. The floating-point texture-loading unit receives raw image data that includes N number of RGB pixels. The shader receives the raw image data and shades the N number of RGB pixels. The RGB to YCrCb compressor receives the shaded image data and calculates the brightness/chroma value of each of the RGB pixels, wherein the chroma value of the RGB pixel having the smallest brightness value among all the RGB pixels is selected as a common chroma value for all the RGB pixels. The parameter adjusting unit receives and adjusts N number of brightness values of the RGB pixels and the common chroma value and stores them in a form of compressed image data into a memory.Type: GrantFiled: March 28, 2006Date of Patent: June 30, 2009Assignee: Silicon Integrated Systems Corp.Inventor: Hung Wei Wu