Patents Assigned to Shared Spectrum Company
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Patent number: 8731474Abstract: Methods and systems for dynamic spectrum access (DSA) in a wireless network are provided. A DSA-enabled device may sense spectrum use in a region and, based on the detected spectrum use, select one or more communication channels for use. The devices also may detect one or more other DSA-enabled devices with which they can form DSA networks. A DSA network may monitor spectrum use by cooperative and non-cooperative devices, to dynamically select one or more channels to use for communication while avoiding or reducing interference with other devices. A man-made noise rejection sub-system is used to permit signal detection while maintaining a low false alarm rate.Type: GrantFiled: May 25, 2012Date of Patent: May 20, 2014Assignee: Shared Spectrum CompanyInventors: Mark Allen McHenry, Karl Steadman, Tugba Erpek, Ajitha Painumkal
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Patent number: 8559301Abstract: Methods for using a detector to monitor and detect channel occupancy are disclosed. The detector resides on a station within a network using a framed format having a periodic time structure. When non-cooperative transmissions are detected by the network, the detector assesses the availability of a backup channel enabling migration of the network. The backup channel serves to allow the network to migrate transparently when the current channel becomes unavailable. The backup channel, however, could be occupied by another network that results in the migrating network interfering with the network already using the backup channel. Thus, the detector detects active transmission sources on the backup channel to determine whether the backup channel is occupied. Methods for using the detector include scheduling detection intervals asynchronously. The asynchronous detection uses offsets from a reference point within a frame.Type: GrantFiled: September 9, 2011Date of Patent: October 15, 2013Assignee: Shared Spectrum CompanyInventors: Mark A. McHenry, Dmitry Dain, Jevgenijs Livsics, Karl Steadman, Olga Ritterbush
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Publication number: 20130028111Abstract: Systems and methods for configuring a network of radios for dynamic spectrum access are described. A network radio can include hardware and/or software modules for detecting a radio environment and negotiating common communications channels with a plurality of other radios in the network. Network radio behavior can be defined by a plurality of predefined policies which are used in combination with the information about the radio environment to select common operating parameters.Type: ApplicationFiled: May 2, 2012Publication date: January 31, 2013Applicant: SHARED SPECTRUM COMPANYInventors: Dmitry DAIN, Igor BAZAROV, Jevgenijs LIVSICS, Mark A. MCHENRY
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Patent number: 8326313Abstract: Methods and systems for dynamic spectrum access (DSA) in a wireless network are provided. A DSA-enabled device may sense spectrum use in a region and, based on the detected spectrum use, select one or more communication channels for use. The devices also may detect one or more other DSA-enabled devices with which they can form DSA networks. A DSA network may monitor spectrum use by cooperative and non-cooperative devices, to dynamically select one or more channels to use for communication while avoiding or reducing interference with other devices.Type: GrantFiled: August 14, 2009Date of Patent: December 4, 2012Assignee: Shared Spectrum CompanyInventors: Mark Allen McHenry, Igor Anatoly Bazarov, Dmitry Dain, Jevgenijs Livsics, Filip Perich, Olga K. Ritterbush, Karl N. Steadman
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Publication number: 20120302190Abstract: Methods and systems for dynamic spectrum access (DSA) in a wireless network are provided. A DSA-enabled device may sense spectrum use in a region and, based on the detected spectrum use, select one or more communication channels for use. The devices also may detect one or more other DSA-enabled devices with which they can form DSA networks. A DSA network may monitor spectrum use by cooperative and non-cooperative devices, to dynamically select one or more channels to use for communication while avoiding or reducing interference with other devices. A man-made noise rejection sub-system is used to permit signal detection while maintaining a low false alarm rate.Type: ApplicationFiled: May 25, 2012Publication date: November 29, 2012Applicant: Shared Spectrum CompanyInventor: Mark Allen McHenry
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Publication number: 20120201330Abstract: An RF power amplifier architecture minimizes spurious emissions by breaking the transmitted signal into narrow spectrum sub-bands, amplifying each separately, and then combining the signals for transmission purposes.Type: ApplicationFiled: April 20, 2012Publication date: August 9, 2012Applicant: SHARED SPECTRUM COMPANYInventor: Mark Allen McHenry
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Patent number: 8184653Abstract: Systems and methods for configuring a network of radios for dynamic spectrum access are described. A network radio can include hardware and/or software modules for detecting a radio environment and negotiating common communications channels with a plurality of other radios in the network. Network radio behavior can be defined by a plurality of predefined policies which are used in combination with the information about the radio environment to select common operating parameters.Type: GrantFiled: August 15, 2007Date of Patent: May 22, 2012Assignee: Shared Spectrum CompanyInventors: Dmitry Dain, Igor Bazarov, Jevgenijs Livsics, Mark A. McHenry
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Patent number: 8184678Abstract: An RF power amplifier architecture minimizes spurious emissions by breaking the transmitted signal into narrow spectrum sub-bands, amplifying each separately, and then combining the signals for transmission purposes.Type: GrantFiled: July 11, 2008Date of Patent: May 22, 2012Assignee: Shared Spectrum CompanyInventor: Mark Allen McHenry
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Patent number: 8155649Abstract: Methods and systems for dynamic spectrum access (DSA) in a wireless network are provided. A DSA-enabled device may sense spectrum use in a region and, based on the detected spectrum use, select one or more communication channels for use. The devices also may detect one or more other DSA-enabled devices with which they can form DSA networks. A DSA network may monitor spectrum use by cooperative and non-cooperative devices, to dynamically select one or more channels to use for communication while avoiding or reducing interference with other devices.Type: GrantFiled: August 14, 2009Date of Patent: April 10, 2012Assignee: Shared Spectrum CompanyInventors: Mark Allen McHenry, Igor Bazarov, Dmitry Dain, Jevgenijs Livsics, Olga K. Ritterbush, Karl N. Steadman
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Publication number: 20120072986Abstract: A method for classifying a signal is disclosed. The method can be used by a station or stations within a network to classify the signal as non-cooperative (NC) or a target signal. The method performs classification over channels within a frequency spectrum. The percentage of power above a first threshold is computed for a channel. Based on the percentage, a signal is classified as a narrowband signal. If the percentage indicates the absence of a narrowband signal, then a lower second threshold is applied to confirm the absence according to the percentage of power above the second threshold. The signal is classified as a narrowband signal or pre-classified as a wideband signal based on the percentage. Pre-classified wideband signals are classified as a wideband NC signal or target signal using spectrum masks.Type: ApplicationFiled: November 1, 2011Publication date: March 22, 2012Applicant: Shared Spectrum CompanyInventors: Eugene Livsics, Mark A. McHenry, Dmitry Dain, Karl Steadman, Olga Ritterbush
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Publication number: 20110319031Abstract: Methods for using a detector to monitor and detect channel occupancy are disclosed. The detector resides on a station within a network using a framed format having a periodic time structure. When non-cooperative transmissions are detected by the network, the detector assesses the availability of a backup channel enabling migration of the network. The backup channel serves to allow the network to migrate transparently when the current channel becomes unavailable. The backup channel, however, could be occupied by another network that results in the migrating network interfering with the network already using the backup channel. Thus, the detector detects active transmission sources on the backup channel to determine whether the backup channel is occupied. Methods for using the detector include scheduling detection intervals asynchronously. The asynchronous detection uses offsets from a reference point within a frame.Type: ApplicationFiled: September 9, 2011Publication date: December 29, 2011Applicant: Shared Spectrum CompanyInventors: Mark A. McHenry, Dmitry Dain, Jevgenijs Livsics, Karl Steadman, Olga Ritterbush
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Patent number: 8064840Abstract: A method and transceiver for determining spectrum availability within a give area is disclosed. The given area includes cells in a grid. A belief evaluator receives a measurement from a signal and assigns an instantaneous belief indicator, an instantaneous disbelief indicator and an instantaneous ignorance indicator based on a detection threshold and the power level of the measurement. The indicators quantify the probability of a presence of a transmitter within the grid cell. A belief accumulator uses the instantaneous indicators along with accumulated belief, disbelief and ignorance indicators from previous measurements to determine cumulative belief, disbelief and ignorance indicators. The accumulated belief, disbelief and ignorance indicators are the results of previous measurements and belief/disbelief/ignorance determinations for the grid cell. An allocator indicates the status of the grid cell and whether a spectrum is available.Type: GrantFiled: June 18, 2009Date of Patent: November 22, 2011Assignee: Shared Spectrum CompanyInventors: Mark Allen McHenry, Alexe E. Leu
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Patent number: 8055204Abstract: A method for classifying a signal is disclosed. The method can be used by a station or stations within a network to classify the signal as non-cooperative (NC) or a target signal. The method performs classification over channels within a frequency spectrum. The percentage of power above a first threshold is computed for a channel. Based on the percentage, a signal is classified as a narrowband signal. If the percentage indicates the absence of a narrowband signal, then a lower second threshold is applied to confirm the absence according to the percentage of power above the second threshold. The signal is classified as a narrowband signal or pre-classified as a wideband signal based on the percentage. Pre-classified wideband signals are classified as a wideband NC signal or target signal using spectrum masks.Type: GrantFiled: August 15, 2007Date of Patent: November 8, 2011Assignee: Shared Spectrum CompanyInventors: Eugene Livsics, Mark A. McHenry, Dmitry Dain, Karl Steadman, Olga Ritterbush
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Patent number: 8027249Abstract: Methods for using a detector to monitor and detect channel occupancy are disclosed. The detector resides on a station within a network using a framed format having a periodic time structure. When non-cooperative transmissions are detected by the network, the detector assesses the availability of a backup channel enabling migration of the network. The backup channel serves to allow the network to migrate transparently when the current channel becomes unavailable. The backup channel, however, could be occupied by another network that results in the migrating network interfering with the network already using the backup channel. Thus, the detector detects active transmission sources on the backup channel to determine whether the backup channel is occupied. Methods for using the detector include scheduling detection intervals asynchronously. The asynchronous detection uses offsets from a reference point within a frame.Type: GrantFiled: October 18, 2006Date of Patent: September 27, 2011Assignee: Shared Spectrum CompanyInventors: Mark A. McHenry, Dmitry Dain, Jevgenijs Livsics, Karl Steadman, Olga Ritterbush
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Publication number: 20100173586Abstract: Methods and systems for dynamic spectrum access (DSA) in a wireless network are provided. A DSA-enabled device may sense spectrum use in a region and, based on the detected spectrum use, select one or more communication channels for use. The devices also may detect one or more other DSA-enabled devices with which they can form DSA networks. A DSA network may monitor spectrum use by cooperative and non-cooperative devices, to dynamically select one or more channels to use for communication while avoiding or reducing interference with other devices.Type: ApplicationFiled: August 14, 2009Publication date: July 8, 2010Applicant: Shared Spectrum CompanyInventors: Mark Allen McHenry, Igor Anatoly Bazarov, Jevgenijs Livsics, Filip Perich, Olga K. Ritterbush, Kari N. Steadman
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Publication number: 20100105332Abstract: Methods and systems for dynamic spectrum access (DSA) in a wireless network are provided. A DSA-enabled device may sense spectrum use in a region and, based on the detected spectrum use, select one or more communication channels for use. The devices also may detect one or more other DSA-enabled devices with which they can form DSA networks. A DSA network may monitor spectrum use by cooperative and non-cooperative devices, to dynamically select one or more channels to use for communication while avoiding or reducing interference with other devices.Type: ApplicationFiled: August 14, 2009Publication date: April 29, 2010Applicant: Shared Spectrum CompanyInventors: Mark Allen McHenry, Igor Anatoly Bazarov, Dmitry Dain, Jevgenijs Livsics, Filip Perich, Olga K. Ritterbush, Karl N. Steadman
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Publication number: 20100097952Abstract: Methods and systems for dynamic spectrum access (DSA) in a wireless network are provided. A DSA-enabled device may sense spectrum use in a region and, based on the detected spectrum use, select one or more communication channels for use. The devices also may detect one or more other DSA-enabled devices with which they can form DSA networks. A DSA network may monitor spectrum use by cooperative and non-cooperative devices, to dynamically select one or more channels to use for communication while avoiding or reducing interference with other devices.Type: ApplicationFiled: August 14, 2009Publication date: April 22, 2010Applicant: Shared Spectrum CompanyInventors: Mark Allen McHenry, Igor Bazarov, Dmitry Dain, Jevgenijs Livsics, Olga K. Ritterbush, Karl N. Steadman
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Patent number: RE43066Abstract: A communications system network that enables secondary use of spectrum on a non-interference basis is disclosed. Each secondary transceiver measures the background spectrum. The system uses a modulation method to measure the background signals that eliminates self-generated interference and also identifies the secondary signal to all primary users via on/off amplitude modulation, allowing easy resolution of interference claims. The system uses high-processing gain probe waveforms that enable propagation measurements to be made with minimal interference to the primary users. The system measures background signals and identifies the types of nearby receivers and modifies the local frequency assignments to minimize interference caused by a secondary system due to non-linear mixing interference and interference caused by out-of-band transmitted signals (phase noise, harmonics, and spurs).Type: GrantFiled: December 2, 2008Date of Patent: January 3, 2012Assignee: Shared Spectrum CompanyInventor: Mark Allen McHenry
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Patent number: RE44237Abstract: A communications system network that enables secondary use of spectrum on a non-interference basis is disclosed. Each secondary transceiver measures the background spectrum. The system uses a modulation method to measure the background signals that eliminates self-generated interference and also identifies the secondary signal to all primary users via on/off amplitude modulation, allowing easy resolution of interference claims. The system uses high-processing gain probe waveforms that enable propagation measurements to be made with minimal interference to the primary users. The system measures background signals and identifies the types of nearby receivers and modifies the local frequency assignments to minimize interference caused by a secondary system due to non-linear mixing interference and interference caused by out-of-band transmitted signals (phase noise, harmonics, and spurs).Type: GrantFiled: November 12, 2010Date of Patent: May 21, 2013Assignee: Shared Spectrum CompanyInventor: Mark Allen McHenry
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Patent number: RE44492Abstract: A communications system network that enables secondary use of spectrum on a non-interference basis is disclosed. Each secondary transceiver measures the background spectrum. The system uses a modulation method to measure the background signals that eliminates self-generated interference and also identifies the secondary signal to all primary users via on/off amplitude modulation, allowing easy resolution of interference claims. The system uses high-processing gain probe waveforms that enable propagation measurements to be made with minimal interference to the primary users. The system measures background signals and identifies the types of nearby receivers and modifies the local frequency assignments to minimize interference caused by a secondary system due to non-linear mixing interference and interference caused by out-of-band transmitted signals (phase noise, harmonics, and spurs).Type: GrantFiled: April 19, 2011Date of Patent: September 10, 2013Assignee: Shared Spectrum CompanyInventor: Mark Allen McHenry