Patents by Inventor Ivan Djordjevic

Ivan Djordjevic 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).

  • Patent number: 11876565
    Abstract: The present disclosure is directed to systems and methods of providing the next generation of quantum enabled cyber security systems. Such systems include a quantum network of satellites that will provide global coverage. The quantum satellite network includes quantum subnetworks comprised of LEO satellites. Some of these LEO satellite-based quantum subnetworks are connected to a subnetwork of MEO satellites. The MEO satellite subnetworks may then be interconnected to the global network of GEO satellites. The LEO/MEO satellites may also be used to interconnect terrestrial quantum networks. Each quantum communication subnetwork may be based on the cluster state concept.
    Type: Grant
    Filed: July 14, 2021
    Date of Patent: January 16, 2024
    Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventor: Ivan Djordjevic
  • Publication number: 20230155689
    Abstract: The present disclosure is directed to systems and methods of providing the next generation of quantum enabled cyber security systems. Such systems include a quantum network of satellites that will provide global coverage. The quantum satellite network includes quantum subnetworks comprised of LEO satellites. Some of these LEO satellite-based quantum subnetworks are connected to a subnetwork of MEO satellites. The MEO satellite subnetworks may then be interconnected to the global network of GEO satellites. The LEO/MEO satellites may also be used to interconnect terrestrial quantum networks. Each quantum communication subnetwork may be based on the cluster state concept.
    Type: Application
    Filed: July 14, 2021
    Publication date: May 18, 2023
    Inventor: Ivan Djordjevic
  • Patent number: 11489622
    Abstract: A controller to communications between a baseband unit (BBU) and a remote radio head (RRH) in a mobile fronthaul (MFH) network. The controller to initialize a pseudorandom seeding in the BBU and RRH and to cause the BBU and RRH to generate a pair of matching pseudorandom bit sequences (PRBS) to enable the BBU and RRH to synchronize communications therebetween; to select a wavelength and to select a route, through the MFH network, to enable the BBU and RRH to communicate using the selected wavelength and route; to select an error correction code and a modulation format for communications between the BBU and RRH; to encode one or more parameters of a physical layer in the MFH network into the PRBS; and to monitor a data stream between the BBU and RRH to determine if a bit error rate has changed for each frame of the data stream.
    Type: Grant
    Filed: June 12, 2021
    Date of Patent: November 1, 2022
    Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventors: Ivan Djordjevic, Houman Rastegarfar, Mingwei Yang
  • Patent number: 11406731
    Abstract: According to the present disclosure, a bioadhesive formulation is provided. The bioadhesive formulation comprises a polycaprolactone dendrimer having a dendrimer core and a plurality of polycaprolactone chains extending from the dendrimer core, wherein at least one of the polycaprolactone chains has an end which is covalently attached with a diazirine, and wherein the diazirine converts to a carbene or a diazoalkyl when a stimulant is applied to the bioadhesive formulation. Methods of forming the bioadhesive formulation are also provided. The bioadhesive could be used in (i) the prevention of thrombosis from tissue fixation and/or (ii) the relief of discomfort and/or pain during and/or after surgery. Preferably, the bioadhesive formulation further comprises a hygroscopic additive, an antithrombotic agent, and/or an anaesthetic agent.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: August 9, 2022
    Assignee: NANYANG TECHNOLOGICAL UNIVERSITY
    Inventors: Terry W. J. Steele, Ivan Djordjevic
  • Publication number: 20220014362
    Abstract: The present disclosure is directed to systems and methods of providing a secure quantum key distribution cryptosystem in which the quantum key data is exchanged between Alice and Bob using a quantum channel and the parity bits associated with the quantum key data are encrypted using a post-quantum computing (PQC) encryption method and communicated between Alice and Bob using a public channel.
    Type: Application
    Filed: July 12, 2021
    Publication date: January 13, 2022
    Inventor: Ivan Djordjevic
  • Publication number: 20210391943
    Abstract: In one embodiment the present disclosure provides a controller to control uplink and downlink communications between at least one baseband unit (BBU) and at least one remote radio head (RRH) in a mobile fronthaul (MFH) network, the controller includes pseudorandom seed generating circuitry to initialize a pseudorandom seeding in the at least one BBU and at least one RRH and to cause the at least one BBU and at least one RRH to generate a pair of matching pseudorandom bit sequences (PRBS), the matching PRBS to enable the at least one BBU and at least one RRH to synchronize communications therebetween; wavelength and route assignment circuitry to select a wavelength and to select a route, through the MFH network, to enable the at least one BBU and at least one RRH to communicate using the selected wavelength and route; error code and modulation format selection circuitry to select an error correction code and a modulation format for communications between the at least one BBU and at least one RRH; transmission
    Type: Application
    Filed: June 12, 2021
    Publication date: December 16, 2021
    Inventors: Ivan Djordjevic, Houman Rastegarfar, Mingwei Yang
  • Publication number: 20200282102
    Abstract: According to the present disclosure, a bioadhesive formulation is provided. The bioadhesive formulation comprises a polycaprolactone dendrimer having a dendrimer core and a plurality of polycaprolactone chains extending from the dendrimer core, wherein at least one of the polycaprolactone chains has an end which is covalently attached with a diazirine, and wherein the diazirine converts to a carbene or a diazoalkyl when a stimulant is applied to the bioadhesive formulation. Methods of forming the bioadhesive formulation are also provided. The bioadhesive could be used in (i) the prevention of thrombosis from tissue fixation and/or (ii) the relief of discomfort and/or pain during and/or after surgery. Preferably, the bioadhesive formulation further comprises a hygroscopic additive, an antithrombotic agent, and/or an anaesthetic agent.
    Type: Application
    Filed: September 6, 2018
    Publication date: September 10, 2020
    Inventors: Terry W. J. STEELE, Ivan DJORDJEVIC
  • Patent number: 10574448
    Abstract: Systems and methods for quantum key distribution using orbital angular momentum (OAM)-modes-enabled secure multidimensional coded modulation. The quantum key distribution including symbols of a raw key across subcarriers and multiplexing the subcarriers to form an electrical carrier. Then optically modulating the electrical carrier with an electro-optical modulator using an optical signal. The optically modulated electrical carrier is then imposed on a pre-determined OAM mode using an optical OAM multiplexer, attenuated, and transmitted across a quantum channel. A receiver then receives the transmitted signal and demultiplexes it with an optical OAM demultiplexer to extract projections. The projections then undergo optical-to-electrical conversion using a coherent optical detector with an optical signal from a local oscillator. A resulting estimated electrical carrier is then demultiplexed into subcarriers.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: February 25, 2020
    Assignee: NEC Corporation
    Inventors: Ivan Djordjevic, Ting Wang, Shaoliang Zhang
  • Patent number: 10574447
    Abstract: Systems and methods for orbital angular momentum (OAM)-based multidimensional wireless communication. The OAM-based multidimensional wireless communication is preformed with a transmitter for generating an RF modulated signal carrying a data sequence. Further included is an OAM antenna array including OAM antenna elements, each of which includes an azimuthal phase shifter and an antenna element. The azimuthal phase shifter shifts an azimuthal phase term of a wavefront generated by the antenna element such that the OAM antenna element imposes the multidimensional modulated signal on a pre-determined OAM mode of a carrier signal corresponding to the azimuthal phase term.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: February 25, 2020
    Assignee: NEC Corporation
    Inventors: Ivan Djordjevic, Ting Wang, Shaoliang Zhang
  • Patent number: 10476599
    Abstract: A method for optical communication includes combining jointly source coding with LDPC channel coding into a nonuniform signalling by mapping low-complexity variable-length prefix codes onto a constellation; and performing arbitrary nonuniform signalling, where information bits and parity bits are transmitted with different modulation schemes.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: November 12, 2019
    Assignee: NEC Corporation
    Inventors: Ting Wang, Ivan Djordjevic
  • Patent number: 10333618
    Abstract: Aspects of the present disclosure describe systems, methods, and structures for physical layer security using hybrid free-space optical and terahertz transmission technologies that advantageously overcome atmospheric characteristics that infirmed the prior art.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: June 25, 2019
    Assignee: NEC Corporation
    Inventors: Ivan Djordjevic, Shaoliang Zhang, Ting Wang
  • Patent number: 10291318
    Abstract: Aspects of the present disclosure describe physical layer security in optical communications wherein Bessel modes are employed and significantly outperform conventional schemes with respect to secrecy and advantageously benefit from atmospheric turbulence effects with beam splitting attacks.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: May 14, 2019
    Assignee: NEC Corporation
    Inventors: Ivan Djordjevic, Shaoliang Zhang, Ting Wang
  • Patent number: 10205591
    Abstract: Systems and methods for orbital angular momentum (OAM)-based multidimensional signaling with multiple-input-multiple-output (MIMO). The wireless communication is achieved using a transmitter including a plurality of orthogonal pulse shapers of a multidimensional modulator, the plurality of orthogonal pulse shapers generating a multidimensional modulated signal by imposing one or more data sequences on corresponding mutually orthogonal filter impulse responses derived from multiple orthogonal basis functions including Slepian sequences. An OAM antenna array including OAM antenna elements is used such that each of the OAM antenna elements includes an azimuthal phase shifter for shifting an azimuthal phase term of a wavefront generated by an antenna element such that the OAM antenna elements impose the multidimensional modulated signal on pre-determined OAM modes of a carrier signal corresponding to the azimuthal phase term.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: February 12, 2019
    Assignee: NEC Corporation
    Inventors: Ivan Djordjevic, Ting Wang, Shaoliang Zhang
  • Publication number: 20190007134
    Abstract: Aspects of the present disclosure describe physical layer security in optical communications wherein Bessel modes are employed and significantly outperform conventional schemes with respect to secrecy and advantageously benefit from atmospheric turbulence effects with beam splitting attacks.
    Type: Application
    Filed: April 27, 2018
    Publication date: January 3, 2019
    Inventors: Ivan DJORDJEVIC, Shaoliang ZHANG, Ting WANG
  • Publication number: 20190007137
    Abstract: Aspects of the present disclosure describe systems, methods, and structures for physical layer security using hybrid free-space optical and terahertz transmission technologies that advantageously overcome atmospheric characteristics that infirmed the prior art.
    Type: Application
    Filed: April 27, 2018
    Publication date: January 3, 2019
    Inventors: Ivan DJORDJEVIC, Shaoliang ZHANG, Ting WANG
  • Publication number: 20180234236
    Abstract: Systems and methods for quantum key distribution using orbital angular momentum (OAM)-modes-enabled secure multidimensional coded modulation. The quantum key distribution including symbols of a raw key across subcarriers and multiplexing the subcarriers to form an electrical carrier. Then optically modulating the electrical carrier with an electro-optical modulator using an optical signal. The optically modulated electrical carrier is then imposed on a pre-determined OAM mode using an optical OAM multiplexer, attenuated, and transmitted across a quantum channel. A receiver then receives the transmitted signal and demultiplexes it with an optical OAM demultiplexer to extract projections. The projections then undergo optical-to-electrical conversion using a coherent optical detector with an optical signal from a local oscillator. A resulting estimated electrical carrier is then demultiplexed into subcarriers.
    Type: Application
    Filed: February 15, 2018
    Publication date: August 16, 2018
    Inventors: Ivan Djordjevic, Ting Wang, Shaoliang Zhang
  • Publication number: 20180234285
    Abstract: Systems and methods for orbital angular momentum (OAM)-based multidimensional wireless communication. The OAM-based multidimensional wireless communication is preformed with a transmitter for generating an RF modulated signal carrying a data sequence. Further included is an OAM antenna array including OAM antenna elements, each of which includes an azimuthal phase shifter and an antenna element. The azimuthal phase shifter shifts an azimuthal phase term of a wavefront generated by the antenna element such that the OAM antenna element imposes the multidimensional modulated signal on a pre-determined OAM mode of a carrier signal corresponding to the azimuthal phase term.
    Type: Application
    Filed: February 15, 2018
    Publication date: August 16, 2018
    Inventors: Ivan Djordjevic, Ting Wang, Shaoliang Zhang
  • Publication number: 20180234139
    Abstract: Systems and methods for orbital angular momentum (OAM)-based multidimensional signaling with multiple-input-multiple-output (MIMO). The wireless communication is achieved using a transmitter including a plurality of orthogonal pulse shapers of a multidimensional modulator, the plurality of orthogonal pulse shapers generating a multidimensional modulated signal by imposing one or more data sequences on corresponding mutually orthogonal filter impulse responses derived from multiple orthogonal basis functions including Slepian sequences. An OAM antenna array including OAM antenna elements is used such that each of the OAM antenna elements includes an azimuthal phase shifter for shifting an azimuthal phase term of a wavefront generated by an antenna element such that the OAM antenna elements impose the multidimensional modulated signal on pre-determined OAM modes of a carrier signal corresponding to the azimuthal phase term.
    Type: Application
    Filed: February 15, 2018
    Publication date: August 16, 2018
    Inventors: Ivan Djordjevic, Ting Wang, Shaoliang Zhang
  • Publication number: 20180091225
    Abstract: A method for optical communication includes combining jointly source coding with LDPC channel coding into a nonuniform signalling by mapping low-complexity variable-length prefix codes onto a constellation; and performing arbitrary nonuniform signalling, where information bits and parity bits are transmitted with different modulation schemes.
    Type: Application
    Filed: April 10, 2017
    Publication date: March 29, 2018
    Inventors: Ting Wang, Ivan Djordjevic
  • Patent number: 9742526
    Abstract: A method to process applicable to coherent optical channels with either linear or nonlinear phase noise includes: splitting a received sequence of data into clusters of points according to a cumulative log-likelihood function from constellation obtained in a previous iteration; generating new constellation points by calculating a center of mass of the clusters of points; repeating until convergence or until a predetermined number of iterations has been reached to determine a signal constellation; and transmitting signals over the coherent optical channels with nonlinear phase noise using the disclosed signal constellation and LDPC-coded modulation concepts.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: August 22, 2017
    Assignee: NEC Corporation
    Inventors: Ivan Djordjevic, Ting Wang