Patents Assigned to Integrated Systems
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Patent number: 7489937Abstract: A method and apparatus for detecting emitter movement. The method and apparatus generally include acquiring a measured signal characteristic corresponding to a signal emitted from an emitter, estimating a signal characteristic corresponding to the signal, and comparing the measured and estimated signal characteristics to determine if the emitter is moving. Such a configuration enables a rapid and accurate detection of emitter movement without requiring multiple measurements, complex systems, or time-consuming calculations.Type: GrantFiled: December 22, 2005Date of Patent: February 10, 2009Assignee: L-3 Communications Integrated Systems, L.P.Inventors: Hyo K. Chung, David L. Reid
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Patent number: 7487067Abstract: Provided is a method and system for signal-driven recovery of a digital pulse stream. The method includes receiving initial parameters including the base characteristics of a pulse signal, the characteristics including the maximum pulse interval. An incoming analog signal is converted to a digital signal and sampled a predetermined number of times at intervals greater than the maximum pulse interval to record a set of minimum signal values and a set of maximum signal values. Each set is averaged to provide an average minimum value and an average maximum value. Based on these values at least one threshold value is then determined, and the digital pulse stream is identified based on the threshold values. The method is repetitive, continually re-determining the threshold values so as to adapt to changes in the incoming signal. A system for performing the method is also provided.Type: GrantFiled: December 19, 2005Date of Patent: February 3, 2009Assignee: L-3 Integrated Systems CompanyInventor: Jerry W. Yancey
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Patent number: 7482782Abstract: A charge control system for lithium battery using pulse width modulation is provided, and it detects the existing voltage of the charging lithium battery by a voltage detector and passes this voltage value to a microprocessor preset in the hand-held apparatus. Thus, the microprocessor can decide the applicable charge stage and confirm the status of the charging battery depending on the different Voltage values in real time. Next, the microprocessor controls a control unit by a pulse width modulation signal to modulate the power-source, which comes from an adaptor, as a constant current or a constant voltage to charge the battery. Accordingly, the charge process is completed by repeating the voltage detection and the duty cycle modulation of the control unit.Type: GrantFiled: September 6, 2006Date of Patent: January 27, 2009Assignee: Integrated Systems Solution Corp.Inventors: Chih-Min Hsu, Dar-Cherng Su, Albert Chen, Cheng-Chieh Ku, Jui-Liang Wang, Charles Huang
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Publication number: 20090015479Abstract: Embodiments of the present invention provide a method and apparatus for all-polarization direction finding. The method and apparatus generally include acquiring measurements at least partially corresponding to an emitted signal and generated utilizing a blind signal extraction algorithm, forming an all-polarization cost function utilizing the acquired measurements, and determining an angle of arrival for the emitted signal utilizing the formed all-polarization cost function. Such a configuration enables angles of arrivals to be easily determined for signals having any polarization without using a multiple signal classification (MUSIC) algorithm.Type: ApplicationFiled: April 28, 2008Publication date: January 15, 2009Applicant: L-3 Communications Integrated Systems, L.P.Inventors: Steven D. Thornton, Dennis J. Close, Mark L. Kargel, Steven P. Stanners
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Patent number: 7474259Abstract: A traffic sensor is mounted at a fixed location to monitor multiple lanes of traffic. The traffic sensor (a) generates a programmable time-varying modulating signal; (b) generates a modulated microwave signal based on the programmable time-varying modulating signal; (c) radiates the modulated microwave signal in a radiation beam at an object; (d) provides a proportional calibration signal based on the modulated microwave signal; (e) measures parameters of the calibration signal, and (f) corrects the programmable time-varying modulating signal based on the parameters of the calibration signal.Type: GrantFiled: September 13, 2005Date of Patent: January 6, 2009Assignee: EIS Electronic Integrated Systems Inc.Inventor: Dan Manor
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Patent number: 7471245Abstract: Methods and apparatus operable to estimate the geolocation of a signal emitter. In some embodiments, the methods comprise acquiring collection data from a plurality of collector elements, computing a plurality of candidate geolocations from the acquired collection data, and applying a clustering analysis to the candidate geolocations to estimate the geolocation of the signal emitter.Type: GrantFiled: January 31, 2007Date of Patent: December 30, 2008Assignee: L3 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: 7456788Abstract: A method and apparatus for reducing geolocation ambiguity in signal tracking. The method and apparatus generally include acquiring a first and a second set of geolocations and comparing the sets to reduce ambiguous geolocations. Such a configuration enables accurate and rapid geolocation determination without requiring complex and time-consuming direction finding devices and methods.Type: GrantFiled: December 22, 2005Date of Patent: November 25, 2008Assignee: L-3 Communications Integrated Systems L.P.Inventors: Hyo K. Chung, David L. Reid
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Patent number: 7444454Abstract: Application Specific Integrated Circuit (“ASIC”) devices, such as Field Programmable Gate Arrays (“FPGAs”), may be interconnected using serial I/O connections, such as high speed multi-gigabit serial transceiver (“MGT”) connections. For example, serial I/O connections may be employed to interconnect a pair of ASICs to create a high bandwidth, low signal count connection, and in a manner so that any given pair of multiple ASIC devices on a single circuit card may communicate with each other through no more than one serial data communication link connection step. A reconfigurable hardware architecture (“RHA”) may be configured to include a communications infrastructure that uses a high-bandwidth packet router to establish standard communications protocols between multiple interfaces and/or multiple devices that may be present on a single circuit card. Additionally, a communications infrastructure may be established across multiple circuit cards.Type: GrantFiled: May 11, 2004Date of Patent: October 28, 2008Assignee: L-3 Communications Integrated Systems L.P.Inventors: Jerry W. Yancey, Yea Z. Kuo
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Patent number: 7444167Abstract: The present invention discloses a dual-band RF transceiver. The transceiver comprises a first module, used as the RF front-end of the dual-band transceiver and used for receiving and transmitting a first RF signal and a second RF signal; a second module, electrically connected to the first module, used as the IF IQ modulator/demodulator of the dual-band RF transceiver; a third module, electrically connected to the first and the second modules, used as the tripe-band phase-locked frequency synthesizer of the dual-band RF transceiver and used for providing a first local oscillating signal and a second local oscillating signal to the first module, and a third local oscillating signal to the second module. The dual-band RF transceiver according to the present invention realizes the dual-band triple-mode operation of IEEE802.11 a/b/g by a single dual-band RF module, and therefore the circuit size, power dissipation, component count, and cost can be dramatically reduced.Type: GrantFiled: June 10, 2005Date of Patent: October 28, 2008Assignees: Integrated System Solution Corp.Inventors: Sheng-Fuh Chang, Wen-Lin Chen, Cheng-Hua Tsai, Chin-Hung Chien, Hung-Cheng Chen, Shu-Fen Tang, Albert Chen
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Patent number: 7440753Abstract: A communication network switch system, comprising: a first phone number database accessed by a cable telephony network service provider; a second phone number database accessed by an internet service provider; a plurality of communication network switch devices conducting audio and/or data communications therebetween through a cable telephony network or an internet, the communication network switch devices switching audio and/or data communications between the cable telephony network or an internet telephony system and a short-range wireless communication network; and a plurality of mobile communication devices each of which including a long-range wireless network system transceiver module, a short-range wireless network system transceiver module and a switch device module.Type: GrantFiled: December 30, 2004Date of Patent: October 21, 2008Assignees: Integrated System Solution Corp.Inventors: Albert Chen, Keh-Lih Chiang
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Patent number: 7441158Abstract: A multi-platform script language interpreter designed for hardware debug is disclosed along with related methods. In part, the invention is configured to act as an embedded hardware debugging software tool for embedded hardware operating on platforms with internal hardware buses, such as platforms with VME buses. The present invention is applicable to a wide variety of buses and can be configured for use with desired buses through the addition of appropriate libraries.Type: GrantFiled: January 10, 2005Date of Patent: October 21, 2008Assignee: L-3 Communications Integrated Systems, L.P.Inventors: Michael R. Legako, Darren R. Berube, Jonathan R. Annillo
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Patent number: 7436910Abstract: Reconfigurable direct radio frequency (RF) bandpass sampling receivers are disclosed that utilize analog interpolation filters to improve performance. The addition of the analog interpolation filter to the bandpass sampling receiver allows the quantization clock to be de-coupled from the RF sampling clock. As such, the quantization can be performed at a much slower rate than the initial RF sampling allowing the final analog bandwidth to be much narrower than the bandwidth of the first stage filter located before the high-speed sampler. The combination of a tunable bandpass filter, tunable bandpass sample clock and analog interpolation filter followed by a further stage of sampling and quantization at a slower rate than the bandpass sample clocking, therefore, provides significant advantageous by de-coupling the quantization sample rate from the high-speed sample rate. If desired, the analog interpolation filter may also be tunable. Other variations and implementations are also described.Type: GrantFiled: October 10, 2006Date of Patent: October 14, 2008Assignee: L-3 Communications Integrated Systems, L.P.Inventors: Gerald L. Fudge, James E. Harvey, Mark A. Chivers, Sujit Ravindran
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Patent number: 7436912Abstract: Nyquist folded bandpass sampling receivers are disclosed that utilize wideband filters and modulated sampling clocks to identify received signals. In operation, multiple Nyquist zones are allowed to fold on top of each other during sampling. Because the RF sampling clock is modulated, separate frequency modulations can be induced within each Nyquist zone. The signals that are folded together from different Nyquist zones can then be identified and distinguished. In particular, when the Nyquist zones fold on top of each other, the different signals from different Nyquist zones can be separated and identified based on the fact that the added modulation is different for each Nyquist zone. Thus, by using one or more clock modulations to induce frequency modulations that are Nyquist zone dependent, multiple Nyquist zones can be aliased together while still allowing for signals from different Nyquist zones to be separated and identified. Other variations and implementations are also described.Type: GrantFiled: October 10, 2006Date of Patent: October 14, 2008Assignee: L-3 Communications Integrated Systems L.P.Inventors: Gerald L. Fudge, James E. Harvey, Mark A. Chivers, Sujit Ravindran
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Patent number: 7436911Abstract: Nyquist folded bandpass sampling receivers are disclosed that utilize narrow band filters in parallel with wideband filters to enhance reception of ultra wideband (UWB) pulses. The addition of the narrow band filter facilitates the reception of ultra wideband signal pulses and, therefore, extends the Nyquist folding bandpass sampling receiver to allow improved processing of ultra wideband (UWB) pulses. RF sampling circuitry utilizing a modulated sampling clock signal can then better capture UWB pulse signals.Type: GrantFiled: October 10, 2006Date of Patent: October 14, 2008Assignee: L-3 Communications Integrated Systems L.P.Inventors: Gerald L. Fudge, James E. Harvey, Mark A. Chivers, Sujit Ravindran
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Patent number: 7433296Abstract: A method and apparatus for detecting the transmitted mode and guard interval length. The mode detection is adopted by the DVB-T system to increase system flexibility and combat multi-path interference in the transmission environment, of the received OFDM signals by applying the concepts of down-sampling and correlation. The unique combination of down-sampling and correlation method requires far less memory than the traditional correlation methods. By comparing the indicators resulting from output of each correlation module, the transmitted mode and guard interval length are detected with much greater reliability.Type: GrantFiled: May 29, 2003Date of Patent: October 7, 2008Assignee: Silicon Integrated Systems Corp.Inventor: Yih-Ming Tsuie
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Patent number: 7426378Abstract: Multiple cochannel FM signals received, for example, in an overloaded signal environment may be separated using parallel interference cancellation techniques.Type: GrantFiled: April 5, 2005Date of Patent: September 16, 2008Assignee: L-3 Communications Integrated Systems, L.P.Inventor: Steven P. Stanners
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Patent number: 7426599Abstract: Application Specific Integrated Circuit (“ASIC”) devices, such as Field Programmable Gate Arrays (“FPGAs”), may be interconnected using serial I/O connections, such as high speed multi-gigabit serial transceiver (“MGT”) connections. For example, serial I/O connections may be employed to interconnect a pair of ASICs to create a high bandwidth, low signal count connection, and in a manner so that any given pair of multiple ASIC devices on a single circuit card may communicate with each other through no more than one serial data communication link connection step. A reconfigurable hardware architecture (“RHA”) may be configured to include a communications infrastructure that uses a high-bandwidth packet router to establish standard communications protocols between multiple interfaces and/or multiple devices that may be present on a single circuit card. Additionally, a communications infrastructure may be established across multiple circuit cards.Type: GrantFiled: September 28, 2006Date of Patent: September 16, 2008Assignee: L-3 Communications Integrated Systems L.P.Inventors: Jerry W. Yancey, Yea Z. Kuo
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Patent number: 7421600Abstract: A power-saving method of continuous display and effective cost in a system that includes memory directly accessed by a CPU and at least one display device within vertical blanking. The method includes the following steps: issuing a Power-saving related message; dropping the Power-saving related message, wherein a Power-saving related flag is not set; setting the Power-saving related flag; setting a VID/FID pending bit in the CPU, wherein the vertical blanking of the display/displays occurs and clearing the Power-saving related flag, wherein the Power-saving related flag is set, and executing a power saving process.Type: GrantFiled: July 29, 2005Date of Patent: September 2, 2008Assignee: Silicon Integrated Systems Corp.Inventor: Te-Lin Ping
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Patent number: 7414582Abstract: Embodiments of the present invention provide a method and apparatus for all-polarization direction finding. The method and apparatus generally include acquiring measurements at least partially corresponding to an emitted signal and generated utilizing a blind signal extraction algorithm, forming an all-polarization cost function utilizing the acquired measurements, and determining an angle of arrival for the emitted signal utilizing the formed all-polarization cost function. Such a configuration enables angles of arrivals to be easily determined for signals having any polarization without using a multiple signal classification (MUSIC) algorithm.Type: GrantFiled: March 3, 2006Date of Patent: August 19, 2008Assignee: L-3 Communications Integrated Systems L.P.Inventors: Steven D. Thornton, Dennis J. Close, Mark L. Kargel, Steven P. Stanners
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Patent number: 7411429Abstract: A system for clock-switching applied in the field of integrated circuits is described. A phase interpolator converts an input clock signal into a clock_A and a clock_B having a phase difference therebetween and transmitting the clock_A and the clock_B. A switch command unit connected to the phase interpolator receives either the clock_A or the clock_B serving as a triggering signal for triggering the switch command unit to transform an input switching signal into an output switching signal when the output switching signal is located in either a rising or a falling edge. A selecting device connected to the phase interpolator and the switch command unit, selects either clock_A or clock_B according to the output switching signal from the switch command unit to output a clock-switching signal composed of clock_A and clock_B.Type: GrantFiled: October 28, 2005Date of Patent: August 12, 2008Assignee: Silicon Integrated Systems Corp.Inventors: Chia-hao Yang, Tze-hsiang Chao