Patents by Inventor Sudhir Aggarwal
Sudhir Aggarwal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8465424Abstract: A method and apparatus is disclosed herein for monitoring vital signs using a health monitor embedded into a mobile device. In one embodiment, the apparatus comprises a mobile device having an embedded health monitor to take measurements of vital signs of an individual, to determine vital sign parameters from the measurements, and to transfer the vital sign parameters; and a computing system communicably coupled to the mobile device to store the vital sign parameters and to perform trend analysis on stored vital sign parameters and to provide feedback to the user or user specified persons and generate alarms.Type: GrantFiled: March 24, 2008Date of Patent: June 18, 2013Assignee: Sudhir AggarwalInventor: Sudhir Aggarwal
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Patent number: 8020029Abstract: The invention includes a method and apparatus for attempting to synchronize delivery of information at a plurality of receiving systems. The method includes generating, at a sending system, a plurality of current messages adapted for rendering an asset within an application space of a respective plurality of receiving systems, determining an accumulated export error for each of the receiving systems, transmitting the current messages toward the respective receiving systems in a manner adapted to reduce the accumulated export errors. The accumulated export error for a receiving system includes an estimated current message export error for a current message generated by the sending system for the receiving system and an accumulated previous message export error for at least one previous message generated by the sending system for the receiving system.Type: GrantFiled: October 10, 2006Date of Patent: September 13, 2011Assignees: Alcatel Lucent, Florida State University Research FoundationInventors: Sudhir Aggarwal, Hemant Banavar, Sarit Mukherjee, Sampath Rangarajan
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Patent number: 7889751Abstract: A transmitter, a receiver, and a transceiver for use in a wireless communication system are disclosed. In one embodiment, the radio frequency (RF) transmitter comprises a first parallel-to-serial converter to convert first parallel data corresponding to a I quadrature baseband signal component into a first set of serial data bits, a second parallel-to-serial converter to convert second parallel data corresponding to a Q quadrature baseband signal component into a second set of serial data bits, and one or more stages having a first XOR gate coupled to a gate terminal of a first transistor and a second XOR gate coupled to a gate terminal of second transistor. The first XOR gate has a pair of inputs coupled to the first set of serial data bits and a first clock (e.g.Type: GrantFiled: March 6, 2007Date of Patent: February 15, 2011Inventor: Sudhir Aggarwal
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Patent number: 7826549Abstract: A method and apparatus is disclosed herein for transmitting data wirelessly.Type: GrantFiled: November 2, 2006Date of Patent: November 2, 2010Inventor: Sudhir Aggarwal
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Patent number: 7650163Abstract: In an impedance matching circuit for a multi-band radio frequency device, a first radio frequency signal in a first sub-band of a multi-band radio frequency signal is selectively outputted. Further, a second radio frequency signal in a second sub-band of the multi-band radio frequency signal is selectively outputted. Selective outputting is done through partly shared and partly non-shared reactive elements, without the need to switch reactive elements.Type: GrantFiled: October 5, 2005Date of Patent: January 19, 2010Assignee: NXP B.V.Inventors: Sudhir Aggarwal, Matthias Locher
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Publication number: 20090240118Abstract: A method and apparatus is disclosed herein for monitoring vital signs using a health monitor embedded into a mobile device. In one embodiment, the apparatus comprises a mobile device having an embedded health monitor to take measurements of vital signs of an individual, to determine vital sign parameters from the measurements, and to transfer the vital sign parameters; and a computing system communicably coupled to the mobile device to store the vital sign parameters and to perform trend analysis on stored vital sign parameters and to provide feedback to the user or user specified persons and generate alarms.Type: ApplicationFiled: March 24, 2008Publication date: September 24, 2009Inventor: Sudhir Aggarwal
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Patent number: 7506370Abstract: Security and mobility overlay architecture (SAMOA) includes security management and secure transport functions for fixed or mobile security subscriber units (SSUs). SSUs within SAMOA are authenticated, authorized, and provided with shared session keys by the security management function. The keys allow each SSU to communicate with the secure transport network, which provides secure connections to other SSUs. Because shared-key, rather than public-key session keys are preferably used, the problems associated with public-key certificate authorities and hierarchies are avoided. The security management function and the secure transport network can be layered efficiently on top of existing Internet protocol (IP) networks and are thus applicable to a wide range of systems that support IP, including 3G wireless, wireless LANs (e.g., 802.11x), wired LANs, and dial-up networks.Type: GrantFiled: May 2, 2003Date of Patent: March 17, 2009Assignee: Alcatel-Lucent USA Inc.Inventor: Sudhir Aggarwal
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Publication number: 20080219378Abstract: A transmitter, a receiver, and a transceiver for use in a wireless communication system are disclosed. In one embodiment, the radio frequency (RF) transmitter comprises a first parallel-to-serial converter to convert first parallel data corresponding to a I quadrature baseband signal component into a first set of serial data bits, a second parallel-to-serial converter to convert second parallel data corresponding to a Q quadrature baseband signal component into a second set of serial data bits, and one or more stages having a first NOR gate coupled to a first transistor and a second NOR gate coupled to a second transistor. The first XOR gate has a pair of inputs coupled to the first set of serial data bits and a first clock (e.g., an I clock) that corresponds to the I quadrature baseband signal component, and has a first output coupled to drive the first transistor, while the second XOR gate has a pair of inputs coupled to the second set of serial data bits and a second clock (e.g.Type: ApplicationFiled: March 6, 2007Publication date: September 11, 2008Inventor: Sudhir Aggarwal
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Publication number: 20070220363Abstract: The invention includes a method and apparatus for attempting to synchronize delivery of information at a plurality of receiving systems. The method includes generating, at a sending system, a plurality of current messages adapted for rendering an asset within an application space of a respective plurality of receiving systems, determining an accumulated export error for each of the receiving systems, transmitting the current messages toward the respective receiving systems in a manner adapted to reduce the accumulated export errors. The accumulated export error for a receiving system includes an estimated current message export error for a current message generated by the sending system for the receiving system and an accumulated previous message export error for at least one previous message generated by the sending system for the receiving system.Type: ApplicationFiled: October 10, 2006Publication date: September 20, 2007Inventors: Sudhir Aggarwal, Hemant Banavar, Sarit Mukherjee, Sampath Rangarajan
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Publication number: 20070198658Abstract: The invention includes a method and apparatus for synchronizing an asset within application space. The method includes receiving asset information comprising an original position of the asset within application space on a sending system and a trajectory of the asset within application space on the sending system, and determining an updated position adapted for placing the asset within application space on a receiving system, wherein the updated position is determined using the original position, the trajectory, and an expected propagation delay from the sending system to the receiving system. The expected propagation delay between the sending and receiving systems is determined by one or more network proxies. The original position and trajectory of the asset may be received in a data structure which may be modified to include the updated position for use by the receiving system in placing the asset within application space on the receiving system.Type: ApplicationFiled: October 10, 2006Publication date: August 23, 2007Inventors: Sudhir Aggarwal, Hemant Banavar, Sarit Mukherjee, Sampath Rangarajan
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Patent number: 7259629Abstract: A variable-impedance device is placed in parallel with the input to a variable-gain amplifier, and is controlled so as to provide a substantially constant load impedance to a source. Preferably, the variable-impedance device includes a diode with a variable bias current. This diode bias current is adjusted inversely with the amplifier bias current, such that the parallel sum of the two input path impedances remains approximately constant across a wide range of gain. This variable gain amplifier system is particularly well suited for use in a wireless transmitter, or cellular telephone.Type: GrantFiled: August 8, 2003Date of Patent: August 21, 2007Assignee: NXP, B.V.Inventors: William Redman-White, Sudhir Aggarwal
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Publication number: 20060030282Abstract: In an impedance matching circuit for a multi-band radio frequency device, a first radio frequency signal in a first sub-band of a multi-band radio frequency signal is selectively outputted. Further, a second radio frequency signal in a second sub-band of the multi-band radio frequency signal is selectively outputted. Selective outputting is done through partly shared and partly non-shared reactive elements, without the need to switch reactive elements.Type: ApplicationFiled: October 5, 2005Publication date: February 9, 2006Inventors: Sudhir Aggarwal, Matthias Locher
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Patent number: 6985698Abstract: In an impedance matching circuit for a multi-band radio frequency device, a first radio frequency signal in a first sub-band of a multi-band radio frequency signal is selectively outputted. Further, a second radio frequency signal in a second sub-band of the multi-band radio frequency signal is selectively outputted. Selective outputting is done through partly shared and partly non-shared reactive elements, without the need to switch reactive elements.Type: GrantFiled: November 14, 2001Date of Patent: January 10, 2006Assignee: Koninklijke Philips Electronics N.V.Inventors: Sudhir Aggarwal, Matthias Locher
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Publication number: 20050242881Abstract: A variable-impedance device is placed in parallel with the input to a variable-gain amplifier, and is controlled so as to provide a substantially constant load impedance to a source. Preferably, the variable-impedance device includes a diode with a variable bias current. This diode bias current is adjusted inversely with the amplifier bias current, such that the parallel sum of the two input path impedances remains approximately constant across a wide range of gain. This variable gain amplifier system is particularly well suited for use in a wireless transmitter, or cellular telephone.Type: ApplicationFiled: August 8, 2003Publication date: November 3, 2005Inventors: William Redman-White, Sudhir Aggarwal
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Publication number: 20040221154Abstract: Security and mobility overlay architecture (SAMOA) includes security management and secure transport functions for fixed or mobile security subscriber units (SSUs). SSUs within SAMOA are authenticated, authorized, and provided with shared session keys by the security management function. The keys allow each SSU to communicate with the secure transport network, which provides secure connections to other SSUs. Because shared-key, rather than public-key session keys are preferably used, the problems associated with public-key certificate authorities and hierarchies are avoided. The security management function and the secure transport network can be layered efficiently on top of existing Internet protocol (IP) networks and are thus applicable to a wide range of systems that support IP, including 3G wireless, wireless LANs (e.g., 802.11x), wired LANs, and dial-up networks.Type: ApplicationFiled: May 2, 2003Publication date: November 4, 2004Inventor: Sudhir Aggarwal
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Patent number: 6717921Abstract: In a multicast network, a method is employed for selecting a low cost multicast conference tree subject to an end-to-end delay constraint for transmissions between any two nodes in the tree that terminate conference participants. The method employs a constrained minimum cost Steiner tree selection technique that integrates facilities costs and a delay constraint into a single objective function to be minimized as the tree is incrementally configured. The method also incorporates a unique path delay metric (delta diameter) that indicates the effect on end-to-end delay resulting from the incremental addition of a next node to the Steiner tree.Type: GrantFiled: May 17, 2000Date of Patent: April 6, 2004Assignee: Lucent Technologies Inc.Inventors: Sudhir Aggarwal, Arun N Netravali, Krishan K Sabnani
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Publication number: 20030092388Abstract: In an impedance matching circuit for a multi-band radio frequency device, a first radio frequency signal in a first sub-band of a multi-band radio frequency signal is selectively outputted. Further, a second radio frequency signal in a second sub-band of the multi-band radio frequency signal is selectively outputted. Selective outputting is done through partly shared and partly non-shared reactive elements, without the need to switch reactive elements.Type: ApplicationFiled: November 14, 2001Publication date: May 15, 2003Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Sudhir Aggarwal, Matthias Locher
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Patent number: 6563375Abstract: According to a particular example application, the present invention is embodied in the form of first and second current-steering sections arranged to steer a differential current input signal. Each of the first and second current-steering sections is current driven via differential current paths. The first current-steering section configured and arranged to source current and thereby drive the second current-steering section. Another aspect of the invention employs stacked Gilbert cells, as described above, to form a variable gain amplifier (“VGA”) circuit that achieves a large dynamic range, a wide frequency response and improved linearity, while consuming relatively low amounts of power.Type: GrantFiled: October 16, 2000Date of Patent: May 13, 2003Assignee: Koninklijke Philips Electronics N.V.Inventors: Abolfazl Khosrowbeygi, Sudhir Aggarwal
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Patent number: 6154463Abstract: A system and method for multicast conferencing and online discussion groups using a periodically determined a close-to-optimal Steiner spanning tree. Both the system and method are suitable for stationary and/or mobile group members.Type: GrantFiled: August 26, 1997Date of Patent: November 28, 2000Assignee: Lucent Technologies, Inc.Inventors: Sudhir Aggarwal, Sanjoy Paul