Patents by Inventor Saeed S. Ghassemzadeh
Saeed S. Ghassemzadeh 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: 8767779Abstract: An arrangement for providing synchronization between a number of overlapping area access points within a wireless LAN utilizes an Ethernet cable connection to transmit synchronization signals from a centralized hub/switch to each of the access points connected to the cable. The synchronization signal takes the form of a direct sequence spread spectrum (DS-SS) signal. At each access point, a filter is used to recover the synchronization signal, allowing for the group of access points to share a common beacon signal and allowing frequency re-use among the access points.Type: GrantFiled: September 19, 2013Date of Patent: July 1, 2014Assignee: AT&T Intellectual Property II, L.P.Inventors: Robert Raymond Miller, II, Saeed S. Ghassemzadeh, John F. Murray
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Publication number: 20140094940Abstract: A method includes processing sensor data received from one or more sensors based on the one or more signatures to produce processed data and determining a mode of motion associated with a movement of a user based on the processed data.Type: ApplicationFiled: September 28, 2012Publication date: April 3, 2014Inventors: Saeed S. Ghassemzadeh, Lusheng Ji, Robert Raymond Miller, II, Behtash Babadi, Vahid Tarokh
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Patent number: 8687672Abstract: A technique for reducing interference between a direct-sequence ultra-wideband communications system and a narrowband communications system uses interference-rejecting spreading codes to reduce signal power in a frequency band associated with the narrowband communications system. A method of operating an ultra-wideband communications system includes applying an interference-rejecting spreading code to a signal for transmission. The interference-rejecting spreading code is configured to reduce power in a particular frequency band of a transmit or receive power spectral density associated with the ultra-wideband signal without substantially reducing power outside that particular frequency band of the transmit or receive power spectral density associated with the ultra-wideband signal.Type: GrantFiled: March 22, 2013Date of Patent: April 1, 2014Assignee: AT&T Intellectual Property I, L.P.Inventors: Saeed S. Ghassemzadeh, Jason Vincent Bellorado, Ashley B. Tarokh
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Publication number: 20140016674Abstract: An arrangement for providing synchronization between a number of overlapping area access points within a wireless LAN utilizes an Ethernet cable connection to transmit synchronization signals from a centralized hub/switch to each of the access points connected to the cable. The synchronization signal takes the form of a direct sequence spread spectrum (DS-SS) signal. At each access point, a filter is used to recover the synchronization signal, allowing for the group of access points to share a common beacon signal and allowing frequency re-use among the access points.Type: ApplicationFiled: September 19, 2013Publication date: January 16, 2014Applicant: AT&T Intellectual Property II, L.P. (formerly known as AT&T Corp.)Inventors: Saeed S. Ghassemzadeh, Robert Raymond Miller, John F. Murray
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Publication number: 20130343310Abstract: A transmit switched antenna system utilizes one of several antennas selection protocols combined with feedback from a receiving device to take advantage of time and space transmission for the same information. A transmit device transmits first information over a first subset of a set of antennas and receives and ACK or NAK from the receiver along with a channel quality indicator. If a NAK is received, the transmitter selects a next antenna subset for transmission, based on the antenna selection protocol utilized. One protocol randomly selects the next subset and does not require the channel quality indicator. Another protocol determines the next antenna subset based on channel quality history and a third protocol selects the next antennas subset based on expectation of retransmissions for different subsets.Type: ApplicationFiled: August 23, 2013Publication date: December 26, 2013Applicant: AT&T INTELLECTUAL PROPERTY I, LP.Inventors: Saeed S. Ghassemzadeh, Robert Raymond Miller II, Sang Joon Kim
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Publication number: 20130329542Abstract: An IS-OFDM system for ultra-wideband (UWB) wireless communications that suppresses narrow-band interference, comprising an in-premises base station (IBS) is described. The IBS further comprises an IS-OFDM transceiver for communicating with a plurality of in-premises terminals (ITs) without creating interference outside an in-premises perimeter. Further, a method for operating an IS-OFDM system for ultra-wideband (UWB) wireless communications that suppresses narrow-band interference and provides local area networking services, in-premises distribution of broadcast cable channels and in-premises wireless access and routing to external networks is described, without creating interference outside an in-premises perimeter.Type: ApplicationFiled: August 5, 2013Publication date: December 12, 2013Applicant: AT&T Intellectual Property II, L.P.Inventors: Diakoumis Parissis Gerakoulis, Saeed S. Ghassemzadeh
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Publication number: 20130324068Abstract: The present invention is a system for increasing Signal-to-Noise Ratio (SNR) in a wireless communication system comprising a plurality of antennas each antenna providing a signal, a device for selecting a subset of signals provided by the plurality of antennas, a maximum ratio combiner for summing the selected subset of signals provided by the plurality of antennas, and a decision device for measuring the selected subset of signals against a predefined threshold. The device for selecting the subset of signals is coupled to the plurality of antennas. The maximum ratio combiner is coupled to the selected subset of signals and the decision device for measuring the selected subset of signals against a predefined threshold. The decision device is coupled to the selecting device such that one selected signal of the selected subset of signals is replaced by an unused signal provided by the plurality of antennas.Type: ApplicationFiled: August 9, 2013Publication date: December 5, 2013Applicant: AT&T Intellectual Property II, LPInventors: Saeed S. Ghassemzadeh, Richard Henry Erving, Robert Raymond Miller, II, Christopher W. Rice
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Patent number: 8571072Abstract: An arrangement for providing synchronization between a number of overlapping area access points within a wireless LAN utilizes a Power over Ethernet (PoE) cable connection to transmit synchronization signals from a centralized hub/switch to each of the access points connected to the cable. The synchronization signal takes the form of a direct sequence spread spectrum (DS-SS) signal that is coupled onto the twisted pair used to provide the low voltage PoE signal to various powered devices. At each access point, a filter is used to remove the synchronization signal from the PoE transport, allowing for the group of access points to share a common beacon signal and allow for frequency re-use among the access points. The DS-SS signal is preferable created by a combination of a baseband signal and a set of separate pseudo noise (PN) sequences defining a precision phase (“pilot tone”) signal, a time mark (superframe/beacon) signal, and a time-of-day (real-time clock) signal.Type: GrantFiled: December 14, 2009Date of Patent: October 29, 2013Assignee: AT&T Intellectual Property II, L.P.Inventors: Saeed S. Ghassemzadeh, Robert Raymond Miller, II, John F. Murray
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Patent number: 8520625Abstract: A transmit switched antenna system utilizes one of several antennas selection protocols combined with feedback from a receiving device to take advantage of time and space transmission for the same information. A transmit device transmits first information over a first subset of a set of antennas and receives an ACK or NACK from the receiver along with a channel quality indicator. If a NACK is received, the transmitter selects a next antenna subset for transmission, based on the antenna selection protocol utilized. One protocol randomly selects the next subset and does not require the channel quality indicator. Another protocol determines the next antenna subset based on channel quality history, and a third protocol selects the next antenna subset based on expectation of retransmissions for different protocols.Type: GrantFiled: May 27, 2010Date of Patent: August 27, 2013Assignee: AT&T Intellctual Property I, L.P.Inventors: Saeed S. Ghassemzadeh, Robert R. Miller, Sang Joon Kim
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Patent number: 8509723Abstract: The present invention is a system for increasing Signal-to-Noise Ratio (SNR) in a wireless communication system comprising a plurality of antennas each antenna providing a signal, a device for selecting a subset of signals provided by the plurality of antennas, a maximum ratio combiner for summing the selected subset of signals provided by the plurality of antennas, and a decision device for measuring the selected subset of signals against a predefined threshold. The device for selecting the subset of signals is coupled to the plurality of antennas. The maximum ratio combiner is coupled to the selected subset of signals and the decision device for measuring the selected subset of signals against a predefined threshold. The decision device is coupled to the selecting device such that one selected signal of the selected subset of signals is replaced by an unused signal provided by the plurality of antennas.Type: GrantFiled: November 25, 2008Date of Patent: August 13, 2013Assignee: AT&T Intellectual Property II, LPInventors: Saeed S. Ghassemzadeh, Richard Henry Erving, Robert Raymond Miller, II, Christopher W. Rice
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Patent number: 8503287Abstract: An IS-OFDM system for ultra-wideband (UWB) wireless communications that suppresses narrow-band interference, comprising an in-premises base station (IBS) is described. The IBS further comprises an IS-OFDM transceiver for communicating with a plurality of in-premises terminals (ITs) without creating interference outside an in-premises perimeter. Further, a method for operating an IS-OFDM system for ultra-wideband (UWB) wireless communications that suppresses narrow-band interference and provides local area networking services, in-premises distribution of broadcast cable channels and in-premises wireless access and routing to external networks is described, without creating interference outside an in-premises perimeter.Type: GrantFiled: March 12, 2012Date of Patent: August 6, 2013Assignee: AT&T Intellectual Property II, L.P.Inventors: Diakoumis Parissis Gerakoulis, Saeed S. Ghassemzadeh
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Patent number: 8406278Abstract: A technique for reducing interference between a direct-sequence ultra-wideband communications system and a narrowband communications system uses interference-rejecting spreading codes to reduce signal power in a frequency band associated with the narrowband communications system. A method of operating an ultra-wideband communications system includes applying an interference-rejecting spreading code to a signal for transmission. The interference-rejecting spreading code is configured to reduce power in a particular frequency band of a transmit or receive power spectral density associated with the ultra-wideband signal without substantially reducing power outside that particular frequency band of the transmit or receive power spectral density associated with the ultra-wideband signal.Type: GrantFiled: November 20, 2009Date of Patent: March 26, 2013Assignee: AT&T Intellectual Property I, L.P.Inventors: Saeed S. Ghassemzadeh, Jason Vincent Bellorado, Ashley B. Tarokh
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Publication number: 20120170443Abstract: An IS-OFDM system for ultra-wideband (UWB) wireless communications that suppresses narrow-band interference, comprising an in-premises base station (IBS) is described. The IBS further comprises an IS-OFDM transceiver for communicating with a plurality of in-premises terminals (ITs) without creating interference outside an in-premises perimeter. Further, a method for operating an IS-OFDM system for ultra-wideband (UWB) wireless communications that suppresses narrow-band interference and provides local area networking services, in-premises distribution of broadcast cable channels and in-premises wireless access and routing to external networks is described, without creating interference outside an in-premises perimeter.Type: ApplicationFiled: March 12, 2012Publication date: July 5, 2012Inventors: Diakoumis Parissis Gerakoulis, Saeed S. Ghassemzadeh
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Publication number: 20120069768Abstract: A transmit switched antenna system utilizes one of several antennas selection protocols combined with feedback from a receiving device to take advantage of time and space transmission for the same information. A transmit device transmits first information over a first subset of a set of antennas and receives an ACK or NACK from the receiver along with a channel quality indicator. If a NACK is received, the transmitter selects a next antenna subset for transmission, based on the antenna selection protocol utilized. One protocol randomly selects the next subset and does not require the channel quality indicator. Another protocol determines the next antenna subset based on channel quality history, and a third protocol selects the next antenna subset based on expectation of retransmissions for different protocols.Type: ApplicationFiled: May 27, 2010Publication date: March 22, 2012Inventors: Saeed S. Ghassemzadeh, Robert R. Miller, Sang Joon Kim
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Patent number: 8134913Abstract: An IS-OFDM system for ultra-wideband (UWB) wireless communications that suppresses narrow-band interference, comprising an in-premises base station (IBS) is described. The IBS further comprises an IS-OFDM transceiver for communicating with a plurality of in-premises terminals (ITs) without creating interference outside an in-premises perimeter. Further, a method for operating an IS-OFDM system for ultra-wideband (UWB) wireless communications that suppresses narrow-band interference and provides local area networking services, in-premises distribution of broadcast cable channels and in-premises wireless access and routing to external networks is described, without creating interference outside an in-premises perimeter.Type: GrantFiled: December 13, 2006Date of Patent: March 13, 2012Assignee: AT&T Intellectual Property II, L.P.Inventors: Diakoumis Parissis Gerakoulis, Saeed S. Ghassemzadeh
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Publication number: 20100304681Abstract: A technique for reducing interference between a direct-sequence ultra-wideband communications system and a narrowband communications system uses interference-rejecting spreading codes to reduce signal power in a frequency band associated with the narrowband communications system. A method of operating an ultra-wideband communications system includes applying an interference-rejecting spreading code to a signal for transmission. The interference-rejecting spreading code is configured to reduce power in a particular frequency band of a transmit or receive power spectral density associated with the ultra-wideband signal without substantially reducing power outside that particular frequency band of the transmit or receive power spectral density associated with the ultra-wideband signal.Type: ApplicationFiled: November 20, 2009Publication date: December 2, 2010Inventors: Saeed S. Ghassemzadeh, Jason Vincent Bellorado, Ashley B. Tarokh
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Publication number: 20100091819Abstract: An arrangement for providing synchronization between a number of overlapping area access points within a wireless LAN utilizes a Power over Ethernet (PoE) cable connection to transmit synchronization signals from a centralized hub/switch to each of the access points connected to the cable. The synchronization signal takes the form of a direct sequence spread spectrum (DS-SS) signal that is coupled onto the twisted pair used to provide the low voltage PoE signal to various powered devices. At each access point, a filter is used to remove the synchronization signal from the PoE transport, allowing for the group of access points to share a common beacon signal and allow for frequency re-use among the access points. The DS-SS signal is preferable created by a combination of a baseband signal and a set of separate pseudo noise (PN) sequences defining a precision phase (“pilot tone”) signal, a time mark (superframe/beacon) signal, and a time-of-day (real-time clock) signal.Type: ApplicationFiled: December 14, 2009Publication date: April 15, 2010Inventors: Saeed S. Ghassemzadeh, Robert Raymond Miller, II, John F. Murray
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Patent number: 7656855Abstract: An arrangement for providing synchronization between a number of overlapping area access points within a wireless LAN utilizes a Power over Ethernet (PoE) cable connection to transmit synchronization signals from a centralized hub/switch to each of the access points connected to the cable. The synchronization signal takes the form of a direct sequence spread spectrum (DS-SS) signal that is coupled onto the twisted pair used to provide the low voltage PoE signal to various powered devices. At each access point, a filter is used to remove the synchronization signal from the PoE transport, allowing for the group of access points to share a common beacon signal and allow for frequency re-use among the access points. The DS-SS signal is preferable created by a combination of a baseband signal and a set of separate pseudo noise (PN) sequences defining a precision phase (“pilot tone”) signal, a time mark (superframe/beacon) signal, and a time-of-day (real-time clock) signal.Type: GrantFiled: August 16, 2006Date of Patent: February 2, 2010Assignee: AT&T Intellectual Property II, LPInventors: Saeed S. Ghassemzadeh, Robert Raymond Miller, II, John F. Murray
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Patent number: 7508749Abstract: The invention provides an apparatus and method for generating overspread orthogonal codes. Overspread orthogonal codes are generated code-multiplying orthogonal codes generated by any method and the overspread orthogonal code length is the product of the code lengths of the orthogonal codes that were code-multiplied. In a telecommunication application, for example, a communication signal is first spread by a first orthogonal code and then overspread by a second orthogonal code. The output of the overspreading process may be further overspread by a third orthogonal code and so on until a desired code length is obtained. Thus, orthogonal code lengths unobtainable by any of the known orthogonal code generators may be generated by overspreading using codes generated by any orthogonal code generator(s) to obtain a desired code length.Type: GrantFiled: February 26, 2004Date of Patent: March 24, 2009Assignee: AT&T Corp.Inventors: Diakoumis Parissis Gerakoulis, Saeed S. Ghassemzadeh
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Publication number: 20090075618Abstract: The present invention is a system for increasing Signal-to-Noise Ratio (SNR) in a wireless communication system comprising a plurality of antennas each antenna providing a signal, a device for selecting a subset of signals provided by the plurality of antennas, a maximum ratio combiner for summing the selected subset of signals provided by the plurality of antennas, and a decision device for measuring the selected subset of signals against a predefined threshold. The device for selecting the subset of signals is coupled to the plurality of antennas. The maximum ratio combiner is coupled to the selected subset of signals and the decision device for measuring the selected subset of signals against a predefined threshold. The decision device is coupled to the selecting device such that one selected signal of the selected subset of signals is replaced by an unused signal provided by the plurality of antennas.Type: ApplicationFiled: November 25, 2008Publication date: March 19, 2009Inventors: Saeed S. Ghassemzadeh, Richard Henry Erving, Robert Raymond Miller, II, Christopher W. Rice