Patents by Inventor Graham M. Avis

Graham M. Avis 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: 6954470
    Abstract: A system and method for wireless communication between a plurality of subscriber units and a base station, the base station communicating information signals from an originating source to a destination subscriber unit over a channel at an assigned one of a plurality of frequencies using repetitive time frames, each said time frame comprising a sequence of time slots. The channel is defined as having the same one or more time slots from the sequence of time slots in one or more of the time frames. The base station includes a central processing unit capable of assigning a duration of time for the information signals being sent to the destination subscriber unit. The duration equals the duration of one or more time slots in the same frame. The central processing unit maintains a memory of which time slots of each time frame have been assigned and provides the time slot assignment, and therefore channel assignment, by consulting said memory.
    Type: Grant
    Filed: May 14, 2002
    Date of Patent: October 11, 2005
    Assignee: InterDigital Technology Corporation
    Inventors: Eric Paneth, Mark J. Handzel, Steven Allan Morley, Graham M. Avis
  • Patent number: 6842440
    Abstract: A system and method for wireless communication between a plurality of subscriber units and a base station, the base station communicating information signals from an originating source to a destination subscriber unit over a channel at an assigned one of a plurality of frequencies using repetitive time frames, each said time frame comprising a sequence of time slots. The channel is defined as having the same one or more time slots from the sequence of time slots in one or more of the time frames. The base station includes a central processing unit capable of assigning a duration of time for the information signals being sent to the destination subscriber unit. The duration equals the duration of one or more time slots in the same frame. The central processing unit maintains a memory of which time slots of each time frame have been assigned and provides the time slot assignment, and therefore channel assignment, by consulting said memory.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: January 11, 2005
    Assignee: InterDigital Technology Corporation
    Inventors: Eric Paneth, Mark J. Handzel, Steven Allan Morley, Graham M. Avis
  • Patent number: 6771667
    Abstract: A subscriber unit synchronizes to a control channel. An assigned frequency and time slot is transmitted on the control channel to the subscriber unit. The subscriber unit is moved from the control channel to the assigned frequency and time slot. Voice information is received at the subscriber unit. The voice information is digitized and compressed to a lower bit rate. The voice information is transmitted together with an associated control channel from the subscriber unit.
    Type: Grant
    Filed: February 26, 2003
    Date of Patent: August 3, 2004
    Assignee: InterDigital Technology Corporation
    Inventors: Eric Paneth, Mark J. Handzel, Steven Allan Morley, Graham M. Avis
  • Publication number: 20030185167
    Abstract: A subscriber unit synchronizes to a control channel. An assigned frequency and time slot is transmitted on the control channel to the subscriber unit. The subscriber unit is moved from the control channel to the assigned frequency and time slot. Voice information is received at the subscriber unit. The voice information is digitized and compressed to a lower bit rate. The voice information is transmitted together with an associated control channel from the subscriber unit.
    Type: Application
    Filed: February 26, 2003
    Publication date: October 2, 2003
    Applicant: InterDigital Technology Corporation
    Inventors: Eric Paneth, Mark J. Handzel, Steven Allan Morley, Graham M. Avis
  • Publication number: 20030142646
    Abstract: A system and method for wireless communication between a plurality of subscriber units and a base station, the base station communicating information signals from an originating source to a destination subscriber unit over a channel at an assigned one of a plurality of frequencies using repetitive time frames, each said time frame comprising a sequence of time slots. The channel is defined as having the same one or more time slots from the sequence of time slots in one or more of the time frames. The base station includes a central processing unit capable of assigning a duration of time for the information signals being sent to the destination subscriber unit. The duration equals the duration of one or more time slots in the same frame. The central processing unit maintains a memory of which time slots of each time frame have been assigned and provides the time slot assignment, and therefore channel assignment, by consulting said memory.
    Type: Application
    Filed: April 25, 2002
    Publication date: July 31, 2003
    Applicant: InterDigital Technology Corporation
    Inventors: Eric Paneth, Mark J. Handzel, Steven Allan Morley, Graham M. Avis
  • Publication number: 20030067895
    Abstract: A system and method for wireless communication between a plurality of subscriber units and a base station, the base station communicating information signals from an originating source to a destination subscriber unit over a channel at an assigned one of a plurality of frequencies using repetitive time frames, each said time frame comprising a sequence of time slots. The channel is defined as having the same one or more time slots from the sequence of time slots in one or more of the time frames. The base station includes a central processing unit capable of assigning a duration of time for the information signals being sent to the destination subscriber unit. The duration equals the duration of one or more time slots in the same frame. The central processing unit maintains a memory of which time slots of each time frame have been assigned and provides the time slot assignment, and therefore channel assignment, by consulting said memory.
    Type: Application
    Filed: May 14, 2002
    Publication date: April 10, 2003
    Applicant: InterDigital Technology Corporation
    Inventors: Eric Paneth, Mark J. Handzel, Steven Allan Morley, Graham M. Avis
  • Patent number: 6393002
    Abstract: A digital telephone system for processing a plurality of information signals received in parallel over telephone lines from a public network exchange which are then transmitted in parallel over a plurality of radio frequency (RF) channels to a plurality of mobile subscriber units, each capable of receiving on any of those RF channels, includes an exchange, signal compressors, a multiplexer, a transmitter and a central processing unit. The central processing unit is responsive to a received connection request signal by providing an assignment signal indicating a slot and an RF channel to be used for the respective information signal. The central processing unit maintains a memory of which slots and which RF channels are so assigned and consults the memory upon receipt of the connection request signal and then provides the assignment signal that establishes the utilization of one of the slots at one of the RF channels that is not assigned to another information signal.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: May 21, 2002
    Assignee: InterDigital Technology Corporation
    Inventors: Eric Paneth, Mark J. Handzel, Steven Allan Morley, Graham M. Avis
  • Publication number: 20020021679
    Abstract: A digital telephone system for processing a plurality of information signals received in parallel over telephone lines from a public network exchange which are then transmitted in parallel over a plurality of radio frequency (RF) channels to a plurality of mobile subscriber units, each capable of receiving on any of those RF channels, includes an exchange, signal compressors, a multiplexer, a transmitter and a central processing unit. The central processing unit is responsive to a received connection request signal by providing an assignment signal indicating a slot and an RF channel to be used for the respective information signal. The central processing unit maintains a memory of which slots and which RF channels are so assigned and consults the memory upon receipt of the connection request signal and then provides the assignment signal that establishes the utilization of one of the slots at one of the RF channels that is not assigned to another information signal.
    Type: Application
    Filed: August 6, 2001
    Publication date: February 21, 2002
    Applicant: InterDigital Technology Corporation
    Inventors: Eric Paneth, Mark J. Handzel, Steven Allan Morley, Graham M. Avis
  • Patent number: 6282180
    Abstract: A telecommunication system for processing a plurality of simultaneous bidirectional communications includes a primary station and at least one secondary station using wireless transmissions over one of a plurality of available RF carrier frequencies. Each carrier frequency has an associated predetermined bandwidth which is designed to accommodate one analog voice signal therein and each carrier frequency contains a plurality of time slots. Each bidirectional communication includes transmit (TX) and receive (RX) information signals.
    Type: Grant
    Filed: November 4, 1999
    Date of Patent: August 28, 2001
    Assignee: InterDigital Technology Corporation
    Inventors: Eric Paneth, Mark J. Handzel, Steven Allan Morley, Graham M. Avis
  • Patent number: 6014374
    Abstract: A telecommunication system for processing a plurality of simultaneous bidirectional communications includes a primary station and at least one secondary station using wireless transmissions over one of a plurality of available RF carrier frequencies. Each carrier frequency has an associated predetermined bandwidth which is designed to accommodate one analog voice signal therein and each carrier frequency contains a plurality of time slots. Each bidirectional communication includes transmit (TX) and receive (RX) information signals.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: January 11, 2000
    Assignee: InterDigital Technology Corporation
    Inventors: Eric Paneth, Mark J. Handzel, Steven Allan Morley, Graham M. Avis
  • Patent number: 5842137
    Abstract: A subscriber unit for a wireless digital telephone system is disclosed. An equalizer for receiving I and Q samples is disclosed which is in the form. The I and Q samples are complex sample pairs provided at a frequency. The equalizer receives a training signal in the form of complex I and Q sample pairs. A training signal is affected by undesirable characteristics that might be present in the I and Q samples. A comparator compares the actual input training signal with the desired output to obtain a set of weighting coefficients for the equalizer to produce the desired output. A frequency correction circuit provides a corrected frequency signal for the frequency of the sample pairs from the weighting coefficients.
    Type: Grant
    Filed: June 22, 1994
    Date of Patent: November 24, 1998
    Assignee: InterDigital Technology Corporation
    Inventors: David N. Critchlow, Graham M. Avis, Sandra J. K. Earlam, Karle J. Johnson, Bruce A. Smetana, Gregory L. Westling, Eric Paneth, Moshe Yehushua
  • Patent number: 5734678
    Abstract: A terrestrial Rf telephone system provides a plurality of voice signal channels on a plurality of forward direction carrier frequencies, each carrier frequency having an associated predetermined bandwidth which is designed to accommodate one analog voice signal, and each carrier frequency containing a plurality of slots. The system includes a base station having a plurality of circuit paths for receiving a plurality of forward direction digitized voice signals; a plurality of compressors for compressing the voice signals; a processor for assigning each of the compressed voice signals onto a dynamically assigned frequency/slot; a plurality of channel controllers, each for sequentially combining the compressed digitized voice signals into a single transmit channel bit stream, with each compressed voice signal occupying a respective repetitive sequential time slot in the transmit channel bit stream; and a plurality of modulators for modulating the carrier frequencies.
    Type: Grant
    Filed: October 2, 1996
    Date of Patent: March 31, 1998
    Assignee: InterDigital Technology Corporation
    Inventors: Eric Paneth, Mark J. Handzel, Steven Allan Morley, Graham M. Avis
  • Patent number: 5687194
    Abstract: A system for the wireless transmission of multiple information signals utilizing digital time division circuits between a base station and a plurality of subscriber stations. The subscriber stations may be fixed or movable. The number of time division circuits is determined by the transmission quality of the signals. The base station is interconnected with an external information network, which may be analog and/or digital. The information signals are selected from the group consisting of voice, data, facsimile, video, computer and instrumentation signals. The modulation level of the signals and the power applied to the system are adjusted in accordance with signal error detection in the system. The system is provided with spatial diversity by using a plurality of antennas selectively spaced from each other to provide relatively high signal reception despite signal fading. The base station operates over a plurality of RF channel pairs.
    Type: Grant
    Filed: April 22, 1993
    Date of Patent: November 11, 1997
    Assignee: InterDigital Technology Corporation
    Inventors: Eric Paneth, Mark J. Handzel, Steven Allan Morley, Graham M. Avis
  • Patent number: 5657358
    Abstract: A toll quality terrestrial wireless digital multiple access terrestrial communication system is disclosed having a base station in communication with telephone lines and with mobile subscriber stations. The system comprises a switching matrix at the base station and set-up means at the subscriber stations. Means are provided for a periodic exchange of information during the course of communication operation concerning the present status for the connection between the base station and a subscriber station, the link quality, power, and timing adjustment thereof and providing adjustment to the subscriber station based thereupon. Base station and subscriber station apparatus are also disclosed including means for periodically exchanging information during the course of communication operation concerning the present status for the connection between the base station and a subscriber station, the link quality, power, and timing adjustment thereof and providing adjustment to the subscriber station based thereupon.
    Type: Grant
    Filed: April 22, 1993
    Date of Patent: August 12, 1997
    Assignee: InterDigital Technology Corporation
    Inventors: Eric Panech, Mark J. Handzel, Steven Allan Morley, Graham M. Avis
  • Patent number: 5325396
    Abstract: A subscriber unit for wireless communication with a base station in a wireless subscriber communication system includes a FIR chip, a DIF (digital intermediate frequency) chip, a single processor chip and a radio. The processor chip transcodes a digital voice input signal to provide digital input symbols; demodulates an output signal received from the base station to provide digital output symbols; and synthesizes a digital voice output signal from the digital output symbols. The FIR chip FIR filters the digital input symbols and generates timing signals for timing the transcoding and synthesizing operations in the processor chip. The DIF chip digitally synthesizes a digital intermediate frequency signal by direct digital synthesis (DDS) and modulates the digital intermediate frequency signal with the filtered input symbols to provide a modulated intermediate frequency input signal. The radio further processes the modulated input signal for transmission to the base station.
    Type: Grant
    Filed: September 4, 1992
    Date of Patent: June 28, 1994
    Assignee: InterDigital Technology Corporation
    Inventors: David N. Critchlow, Moshe Yehushua, Graham M. Avis, Wade L. Heimbigner, Karle J. Johnson, George A. Wiley
  • Patent number: 5168507
    Abstract: A digital wireless subscriber telephone unit for wireless communication with a base station. An IF is used within the subscriber unit and base station which is combined with a carrier signal generated by a synthesizer for RF transmission between stations. In intervals between actuation of the system, a training mode is used wherein a known training signal is compared with a known values to produce correction coefficients to compensate for undesirable variations in timing and/or frequency, these constants being stored for use in correcting actual received signals. During demodulation, the modulated digital signals are fed to the modem processor in the form of time multiplexed I and Q samples and are demultiplexed. The demultiplexed I and Q samples are fed to an equalizer and frequency correction circuit for minimization of errors for production of a frequency correction signal based upon the correction coefficients which is used to correct any errors in the timing and frequency of the system.
    Type: Grant
    Filed: November 9, 1989
    Date of Patent: December 1, 1992
    Assignee: International Mobile Machines Corporation
    Inventors: David N. Critchlow, Graham M. Avis, Sandra J. K. Earlam, Karle J. Johnson, Bruce A. Smetana, Gregory L. Westling, Eric Paneth, Moshe Yehushua
  • Patent number: 5159705
    Abstract: A frequency synthesizer that generates two output signals at a set frequency apart from each other and in synchronization with each other. The output frequency is selected by a microprocessor and the set frequency difference between the two output signals is determined by a frequency divider and a voltage controlled oscillator.
    Type: Grant
    Filed: March 13, 1992
    Date of Patent: October 27, 1992
    Assignee: International Mobile Machines Corporation
    Inventors: David N. Critchlow, Graham M. Avis, Sandra J. K. Earlam, Karle J. Johnson, Bruce A. Smetana
  • Patent number: 5146473
    Abstract: A subscriber unit for wireless communication with a base station in a wireless subscriber communication system includes a FIR chip, a DIF (digital intermediate frequency) chip, a single processor chip and a radio. The processor chip transcodes a digital voice input signal to provide digital input symbols; demodulates an output signal received from the base station to provide digital output symbols; and synthesizes a digital voice output signal from the digital output symbols. The FIR chip FIR filters the digital input symbols and generates timing signals for timing the transcoding and synthesizing operations in the processor chip. The DIF chip digitally synthesizes a digital intermediate frequency signal by direct digital synthesis (DDS) and modulates the digital intermediate frequency signal with the filtered input symbols to provide a modulated intermediate frequency input signal. The radio further processes the modulated input signal for transmission to the base station.
    Type: Grant
    Filed: February 20, 1991
    Date of Patent: September 8, 1992
    Assignee: International Mobile Machines Corporation
    Inventors: David N. Critchlow, Moshe Yehushua, Graham M. Avis, Wade L. Heimbigner, Karle J. Johnson
  • Patent number: 5121391
    Abstract: A system for the wireless transmission of multiple information signals utilizing digital time division circuits between a base station and a plurality of subscriber stations. The subscriber stations may be fixed or movable. The number of time division circuits is determined by the transmission quality of the signals. The base station is interconnected with an external information network, which may be analong and/or digital. The information signals are selected from the group consisting of voice, data, facsimile, video, computer and instrumentation signals. The modulation level of the the signals and the power applied to the system are adjusted in accordance with the signal error detection in the system. The system is provided with spatial diversity by using a plurality of antennas selectively spaced from each other to provide relatively high signal reception despite signal fading. The base station operates over a plurality of RF channel pairs.
    Type: Grant
    Filed: November 20, 1989
    Date of Patent: June 9, 1992
    Assignee: International Mobile Machines
    Inventors: Eric Paneth, Mark J. Handzel, Steven A. Morley, Graham M. Avis
  • Patent number: 5119375
    Abstract: A system and method for the wireless transmission of information signals between a base station and a plurality of subscriber stations.
    Type: Grant
    Filed: December 27, 1990
    Date of Patent: June 2, 1992
    Assignee: International Mobile Machines Corp.
    Inventors: Eric Paneth, Mark J. Handzel, Steven A. Morley, Graham M. Avis