Patents by Inventor Leonard Joseph Cimini, Jr.

Leonard Joseph Cimini, Jr. 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).

  • OFDM communication system and method having a reduced peak-to-average power ratio
    Patent number: 9628312
    Abstract: An OFDM system embeds sequence information in the transmitted signal that reduces peak average power ratio (PAP) with minimal impact on the overall system efficiency. A marker is embedded onto the transmitted information that is used to identify the combining (inversion) sequence at the receiver. In one embodiment, selected tones in a cluster are rotated when the corresponding phase factor rotates the cluster.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: April 18, 2017
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Leonard Joseph Cimini, Jr., Nelson Ray Sollenberger
  • Method and system for reduction of peak-to-average power ratio of transmission signals comprising overlapping waveforms
    Patent number: 9584353
    Abstract: The present invention provides a method and system for reducing the peak to average power ratio (PAP) of a signal with low computational complexity. According to one embodiment, the present invention is applied to reduce the PAP of an OFDM signal. According to an alternative embodiment, the present invention, is applied to reduce the PAP of a CDMA signal. Rather than seeking the optimum solution, which involves significant computational complexity, the present invention provides for a number of sub-optimal techniques for reducing the PAP of an OFDM signal but with much lower computational complexity.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: February 28, 2017
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Leonard Joseph Cimini, Jr., Nelson Ray Sollenberger
  • METHOD AND SYSTEM FOR REDUCTION OF PEAK- TO-AVERAGE POWER RATIO OF TRANSMISSION SIGNALS COMPRISING OVERLAPPING WAVEFORMS
    Publication number: 20150103815
    Abstract: The present invention provides a method and system for reducing the peak to average power ratio (PAP) of a signal with low computational complexity. According to one embodiment, the present invention is applied to reduce the PAP of an OFDM signal. According to an alternative embodiment, the present invention, is applied to reduce the PAP of a CDMA signal. Rather than seeking the optimum solution, which involves significant computational complexity, the present invention provides for a number of sub-optimal techniques for reducing the PAP of an OFDM signal but with much lower computational complexity.
    Type: Application
    Filed: December 19, 2014
    Publication date: April 16, 2015
    Inventors: Leonard Joseph Cimini, JR., Nelson Ray Sollenberger
  • Method and system for reduction of peak-to-average power ratio of transmission signals comprising overlapping waveforms
    Patent number: 8948808
    Abstract: The present invention provides a method and system for reducing the peak to average power ratio (PAP) of a signal with low computational complexity. According to one embodiment, the present invention is applied to reduce the PAP of an OFDM signal. According to an alternative embodiment, the present invention, is applied to reduce the PAP of a CDMA signal. Rather than seeking the optimum solution, which involves significant computational complexity, the present invention provides for a number of sub-optimal techniques for reducing the PAP of an OFDM signal but with much lower computational complexity.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: February 3, 2015
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Leonard Joseph Cimini, Jr., Nelson Ray Sollenberger
  • OFDM COMMUNICATION SYSTEM AND METHOD HAVING A REDUCED PEAK-TO-AVERAGE POWER RATIO
    Publication number: 20140314187
    Abstract: An OFDM system embeds sequence information in the transmitted signal that reduces peak average power ratio (PAP) with minimal impact on the overall system efficiency. A marker is embedded onto the transmitted information that is used to identify the combining (inversion) sequence at the receiver. In one embodiment, selected tones in a cluster are rotated when the corresponding phase factor rotates the cluster.
    Type: Application
    Filed: June 23, 2014
    Publication date: October 23, 2014
    Inventors: LEONARD JOSEPH CIMINI, JR., Nelson Ray Sollenberger
  • METHOD AND SYSTEM FOR REDUCTION OF PEAK-TO-AVERAGE POWER RATIO OF TRANSMISSION SIGNALS COMPRISING OVERLAPPING WAVEFORMS
    Publication number: 20140192924
    Abstract: The present invention provides a method and system for reducing the peak to average power ratio (PAP) of a signal with low computational complexity. According to one embodiment, the present invention is applied to reduce the PAP of an OFDM signal. According to an alternative embodiment, the present invention, is applied to reduce the PAP of a CDMA signal. Rather than seeking the optimum solution, which involves significant computational complexity, the present invention provides for a number of sub-optimal techniques for reducing the PAP of an OFDM signal but with much lower computational complexity.
    Type: Application
    Filed: March 10, 2014
    Publication date: July 10, 2014
    Applicant: AT&T Intellectual Property II, L.P.
    Inventors: LEONARD JOSEPH CIMINI, JR., Nelson Ray Sollenberger
  • OFDM communication system and method having a reduced peak-to-average power ratio
    Patent number: 8761191
    Abstract: An OFDM system embeds sequence information in the transmitted signal that reduces peak average power ratio (PAP) with minimal impact on the overall system efficiency. A marker is embedded onto the transmitted information that is used to identify the combining (inversion) sequence at the receiver. In one embodiment, selected tones in a cluster are rotated when the corresponding phase factor rotates the cluster.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: June 24, 2014
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Leonard Joseph Cimini, Jr., Nelson Ray Sollenberger
  • Method and system for reduction of peak-to-average power ratio of transmission signals comprising overlapping waveforms
    Patent number: 8670796
    Abstract: The present invention provides a method and system for reducing the peak to average power ratio (PAP) of a signal with low computational complexity. According to one embodiment, the present invention is applied to reduce the PAP of an OFDM signal. According to an alternative embodiment, the present invention, is applied to reduce the PAP of a CDMA signal. Rather than seeking the optimum solution, which involves significant computational complexity, the present invention provides for a number of sub-optimal techniques for reducing the PAP of an OFDM signal but with much lower computational complexity.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: March 11, 2014
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Leonard Joseph Cimini, Jr., Nelson Ray Sollenberger
  • Method and system for reduction of peak-to-average power ratio of transmission signals comprising overlapping waveforms
    Patent number: 8346292
    Abstract: The present invention provides a method and system for reducing the peak to average power ratio (PAP) of a signal with low computational complexity. According to one embodiment, the present invention is applied to reduce the PAP of an OFDM signal. According to an alternative embodiment, the present invention, is applied to reduce the PAP of a CDMA signal. Rather than seeking the optimum solution, which involves significant computational complexity, the present invention provides for a number of sub-optimal techniques for reducing the PAP of an OFDM signal but with much lower computational complexity.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: January 1, 2013
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Leonard Joseph Cimini, Jr., Nelson Ray Sollenberger
  • OFDM communication system and method having a reduced peak-to-average power ratio
    Patent number: 8335225
    Abstract: An OFDM system embeds sequence information in the transmitted signal that reduces peak average power ratio (PAP) with minimal impact on the overall system efficiency. A marker is embedded onto the transmitted information that is used to identify the combining (inversion) sequence at the receiver. In one embodiment, selected tones in a cluster are rotated when the corresponding phase factor rotates the cluster.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: December 18, 2012
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Leonard Joseph Cimini, Jr., Nelson Ray Sollenberger
  • METHOD AND SYSTEM FOR REDUCTION OF PEAK-TO-AVERAGE POWER RATIO OF TRANSMISSION SIGNALS COMPRISING OVERLAPPING WAVEFORMS
    Publication number: 20120099580
    Abstract: The present invention provides a method and system for reducing the peak to average power ratio (PAP) of a signal with low computational complexity. According to one embodiment, the present invention is applied to reduce the PAP of an OFDM signal. According to an alternative embodiment, the present invention, is applied to reduce the PAP of a CDMA signal. Rather than seeking the optimum solution, which involves significant computational complexity, the present invention provides for a number of sub-optimal techniques for reducing the PAP of an OFDM signal but with much lower computational complexity.
    Type: Application
    Filed: October 25, 2011
    Publication date: April 26, 2012
    Inventors: Leonard Joseph Cimini, JR., Nelson Ray Sollenberger
  • Adaptive MAC fragmentation and rate selection for 802.11 wireless networks
    Patent number: 8121103
    Abstract: A method for setting and adjusting MAC fragmentation threshold for IEEE 802.11 networks operating at different data rates is presented. The fragmentation threshold is adjusted based on throughput performance, delay constraints and hidden node influence.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: February 21, 2012
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Leonard Joseph Cimini, Jr., Zoran Kostic, Kin K Leung, Hujun Yin
  • OFDM COMMUNICATION SYSTEM AND METHOD HAVING A REDUCED PEAK-TO-AVERAGE POWER RATIO
    Publication number: 20110292985
    Abstract: An OFDM system embeds sequence information in the transmitted signal that reduces peak average power ratio (PAP) with minimal impact on the overall system efficiency. A marker is embedded onto the transmitted information that is used to identify the combining (inversion) sequence at the receiver. In one embodiment, selected tones in a cluster are rotated when the corresponding phase factor rotates the cluster.
    Type: Application
    Filed: August 8, 2011
    Publication date: December 1, 2011
    Inventors: Leonard Joseph Cimini, JR., Nelson Ray Sollenberger
  • Method and system for reduction of peak-to-average power ratio of transmission signals comprising overlapping waveforms
    Patent number: 8064853
    Abstract: The present invention provides a method and system for reducing the peak to average power ratio (PAP) of a signal with low computational complexity. According to one embodiment, the present invention is applied to reduce the PAP of an OFDM signal. According to an alternative embodiment, the present invention, is applied to reduce the PAP of a CDMA signal. Rather than seeking the optimum solution, which involves significant computational complexity, the present invention provides for a number of sub-optimal techniques for reducing the PAP of an OFDM signal but with much lower computational complexity. In particular, according to one embodiment utilizing the PTS approach, an iterative technique is used to assign phase factors to each of a set of partial transmit sequences from a set of possible phase factors. Experimental results using the iterative technique showed only a slight degradation (1 dB) from the optimal approach using the same number of subblocks and subcarriers.
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: November 22, 2011
    Inventors: Leonard Joseph Cimini, Jr., Nelson Ray Sollenberger
  • OFDM communication system and method having a reduced peak-to-average power ratio
    Patent number: 7995602
    Abstract: An OFDM system embeds sequence information in the transmitted signal that reduces peak average power ratio (PAP) with minimal impact on the overall system efficiency. A marker is embedded onto the transmitted information that is used to identify the combining (inversion) sequence at the receiver. In one embodiment, selected tones in a cluster are rotated when the corresponding phase factor rotates the cluster.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: August 9, 2011
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Leonard Joseph Cimini, Jr., Nelson Ray Sollenberger
  • Method for estimating time and frequency offset in an OFDM system
    Patent number: 7990839
    Abstract: A receiver that employs inherent characteristics of frequency domain representation of the data symbols. By computing a differential-in-frequency function across a large number of OFDM tones, robust estimates of time and frequency offset are obtained. The obtained time and frequency estimates provide control to sampling and frequency offset elements that are interposed between the reliever input and subsequent receiver stages.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: August 2, 2011
    Inventors: Leonard Joseph Cimini, Jr., Bruce Edwin McNair
  • Adaptive MAC fragmentation and rate selection for 802.11 wireless networks
    Publication number: 20110149770
    Abstract: A method for setting and adjusting MAC fragmentation threshold for IEEE 802.11 networks operating at different data rates is presented. The fragmentation threshold is adjusted based on throughput performance, delay constraints and hidden node influence.
    Type: Application
    Filed: February 18, 2011
    Publication date: June 23, 2011
    Inventors: Leonard Joseph Cimini, JR., Zoran Kostic, Kin K. Leung, Hujun Yin
  • Adaptive MAC fragmentation and rate selection for 802.11 wireless networks
    Patent number: 7894413
    Abstract: A method for setting and adjusting MAC fragmentation threshold for IEEE 802.11 networks operating at different data rates is presented. The fragmentation threshold is adjusted based on throughput performance, delay constraints and hidden node influence.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: February 22, 2011
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Leonard Joseph Cimini, Jr., Zoran Kostic, Kin K Leung, Hujun Yin
  • Packet shaping for mixed rate 802.11 wireless networks
    Patent number: 7769043
    Abstract: A method of shaping data packet transmissions by nodes in a wireless network is presented. Each node sets a maximum limit for MAC service data unit size based on data rate so that maximum transmission times for data packet transmissions by all of the nodes are approximately the same.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: August 3, 2010
    Assignee: AT&T Corp.
    Inventors: Leonard Joseph Cimini, Jr., Zoran Kostic, Kin K Leung, Hujun Yin
  • METHOD AND SYSTEM FOR REDUCTION OF PEAK-TO-AVERAGE POWER RATIO OF TRANSMISSION SIGNALS COMPRISING OVERLAPPING WAVEFORMS
    Publication number: 20100040089
    Abstract: The present invention provides a method and system for reducing the peak to average power ratio (PAP) of a signal with low computational complexity. According to one embodiment, the present invention is applied to reduce the PAP of an OFDM signal. According to an alternative embodiment, the present invention, is applied to reduce the PAP of a CDMA signal. Rather than seeking the optimum solution, which involves significant computational complexity, the present invention provides for a number of sub-optimal techniques for reducing the PAP of an OFDM signal but with much lower computational complexity. In particular, according to one embodiment utilizing the PTS approach, an iterative technique is used to assign phase factors to each of a set of partial transmit sequences from a set of possible phase factors. Experimental results using the iterative technique showed only a slight degradation (1 dB) from the optimal approach using the same number of subblocks and subcarriers.
    Type: Application
    Filed: October 23, 2009
    Publication date: February 18, 2010
    Inventors: LEONARD JOSEPH CIMINI, JR., Nelson Ray Sollenberger