Patents Represented by Attorney, Agent or Law Firm Steven G. Parmelee
  • Method for controlling the scheduling of multiple access to communication resources
    Patent number: 5142533
    Abstract: A method of providing a communication unit (10) access to a shared communication resource. In the communication unit, a clock (123) is maintained, and the unit detects the time when an inhibit period on the shared communication resource begins, and the time at which it concludes. When access to the shared communication resource is desired, the unit attempts to access the communication resource based on the time at which access was desired, as well as the times at which a detected inhibit condition began and concluded. A virtual time clock runs only during non-inhibit periods. Access to the communication resource is then based on when the virtual time clock equals the desired access time.
    Type: Grant
    Filed: March 28, 1991
    Date of Patent: August 25, 1992
    Assignee: Motorola, Inc.
    Inventors: Kenneth J. Crisler, Michael L. Needham
  • Data capable radio communication console
    Patent number: 5142693
    Abstract: A communication control console having both data and voice capability. Data signalling as transmitted on a voice channel is converted into an internally compatible format, regardless of the original signalling type, for use by the console. Conversely, data messages originating from the console are converted from the internal format to the appropriate external signalling format.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: August 25, 1992
    Assignee: Motorola, Inc.
    Inventors: Linda A. Hanks, Gerald R. Drobka, Gregory A. Dertz
  • Convolutional decoder using soft-decision decoding with channel state information
    Patent number: 5134635
    Abstract: A convolutional decoder which assigns bit metrics to at least one bit of a symbol in a multilevel system. This decoder uses soft-decision Viterbi decoding with channel state information of a convolutionally-encoded communication transmitted using multilevel modulation.
    Type: Grant
    Filed: July 30, 1990
    Date of Patent: July 28, 1992
    Assignee: Motorola, Inc.
    Inventors: Daehyoung Hong, Steven C. Jasper, Mark R. Poulin
  • Communication console station with priority queuing
    Patent number: 5134652
    Abstract: A communication console station links a plurality of communication resources (101, 103, and 105) for use by an operator. Incoming calls are placed in an incoming-call queue (207), calls on hold are placed in a holding queue (209), and all available communication resources are placed in a resource queue (211) The operator presses a single button (303, 305, or 307) to obtain the top resource from the associated queue (207, 209, or 211), which lists resources according to a predetermined priority.
    Type: Grant
    Filed: August 23, 1991
    Date of Patent: July 28, 1992
    Assignee: Motorola, Inc.
    Inventors: Allan G. Brown, Joseph DiFonzo, Daniel C. Sullivan, Peggy K. Matson, Sheree Johnson
  • Phase locked loop frequency synthesizer with DC data modulation capability
    Patent number: 5130676
    Abstract: A phase locked loop frequency synthesizer with DC data modulation capability is described. This synthesizer includes an arrangement for detecting one of a plurality of FSK data levels (61), generating a corresponding predetermined compensation signal (71) and utilizing the compensation signal to substantially continuously compensate the frequency synthesizer for normal response to the detected data modulation level.
    Type: Grant
    Filed: September 6, 1991
    Date of Patent: July 14, 1992
    Assignee: Motorola, Inc.
    Inventor: Leslie D. Mutz
  • Speech quality improvement for voice coders and synthesizers
    Patent number: 5127054
    Abstract: A harmonic signal is created from a limited spectral representation of a voice signal. The harmonic signal is combined with the at least a portion of the limited delayed spectral signal to provide a reconstructed speech signal having perceptually improved audio quality.
    Type: Grant
    Filed: October 22, 1990
    Date of Patent: June 30, 1992
    Assignee: Motorola, Inc.
    Inventors: Daehyoung Hong, Michael D. Kotzin, Anthony P. van den Heuvel
  • All-digital quadrature modulator
    Patent number: 5121412
    Abstract: A CPFSK quadrature modulator (300) is disclosed utilizing an all-digital implementation. The serial data input signal (20 ) is formatted into parallel overlapping bits using a shift register (202), an up/down counter (206), and an interpolation counter (204) and applied as address lines to in-phase and quadrature-phase memories (208, 210). A multiple of the bit clock is used to address carrier generation ROMs (216, 218). The carrier signal is then modulated by the in-phase and quadrature-phase data signals (212, 214, 222), converted to an analog signal by a D/A converter (250), and low pass filtered (254) to generate the analog output signal (255). A single ROM (440) is utilized to implement all the look-up tables, multipliers, and adder. The all-digital implementation allows for precise control of the modulation index to h.dbd.0.5.+-.0.05 percent over time, temperature, power levels, etc.
    Type: Grant
    Filed: January 3, 1989
    Date of Patent: June 9, 1992
    Assignee: Motorola, Inc.
    Inventor: David E. Borth
  • Directional antenna arrangement method for simulcast broadcasting
    Patent number: 5117503
    Abstract: A method of configuring directional antennas to more fully radiate a geographic region serviced by a simulcast radio system can reduce the number of omni-directional antennas used by prior art methods. Directional antennas having significant differences between frontal and rearward radiated signal levels are used to provide large signal amplitude differences when signal phase differences in the simulcast coverage area become appreciable.
    Type: Grant
    Filed: October 2, 1989
    Date of Patent: May 26, 1992
    Assignee: Motorola, Inc.
    Inventor: Carl B. Olson
  • Sideband receiver with pilot lock
    Patent number: 5109531
    Abstract: A sideband receiver that locks to a pilot component of a received signal. The pilot component is down-converted and then up-converted prior to phase comparing the pilot component information to provide a lock function. The receiver architecture allows monolithic integration of the receiver on a single integrated circuit (401).
    Type: Grant
    Filed: February 28, 1989
    Date of Patent: April 28, 1992
    Assignee: Motorola, Inc.
    Inventor: Joseph P. Heck
  • Wide area trunked channel busy override
    Patent number: 5101502
    Abstract: A typical multi-site trunked communication system comprises communication units that are arranged into talk groups, communication resources distributed among communication sites, and a communication resource allocator. In such a system, a methodology is incorporated that allows communication units to override communication site busy conditions, where the communication site busy conditions prohibits placement of group calls until all communication sites have an available communication resource. The communication site busy condition may be overridden by a communication unit by initiating a busy override signal. Once the busy override signal is initiated, the communication resource allocator allocates, in each site, a communication resource to the communication group of the requesting communication unit.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: March 31, 1992
    Assignee: Motorola, Inc.
    Inventors: William A. Felderman, Daniel J. McDonald, Thaddeus A. Kozlowski
  • Intersystem group call communication system and method
    Patent number: 5095529
    Abstract: Communication systems having dedicated communication resources are provided with receivers that monitor the communication resources of other communication systems, and roamers are preregistered in non-home systems. Using this infrastructure, a group call can be sourced in one system and relayed to roamers located in other systems.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: March 10, 1992
    Assignee: Motorola, Inc.
    Inventors: Richard A. Comroe, Arun Sobti
  • Key management system
    Patent number: 5093860
    Abstract: This key management system effectively solves the key distribution problems of distance, time, operator error, and security risk by transferring encryption keys with appropriate system information between a key management controller (101) and a remote keyloader (109). The keyloader (109) is then coupled to a communication device to transfer (327) the keys and receive (329) identification information from the communication device. The keyloader (109) then sends (323) the information to the key management controller (101) that controls the distribution of the encryption keys and collection of the communication device identifications.
    Type: Grant
    Filed: September 27, 1990
    Date of Patent: March 3, 1992
    Assignee: Motorola, Inc.
    Inventors: Kurt W. Steinbrenner, Michael W. Bright
  • Communication system network
    Patent number: 5093829
    Abstract: The present invention discloses a communication system network that comprises a plurality of communication systems and a processing multiplexer. The communication systems, which may be either conventional communication systems and/or trunked communication systems, transmit digitized audio signals and communication system data to the processing multiplexer. Based on signal destination data, which is part of the communication system data, the processing multiplexer processes the digitized signals and routes the resultant signals to the appropriate signal destinations of the communication systems.
    Type: Grant
    Filed: July 3, 1990
    Date of Patent: March 3, 1992
    Assignee: Motorola, Inc.
    Inventor: John W. Maher
  • Trunked communication system scanning method and apparatus
    Patent number: 5093926
    Abstract: A communication unit having a dynamic control resource scan list utilizes the scan list to more effectively roam from the current trunked communication system to other trunked communication systems. The scan list contains control resource information of trunked communication systems, where the control resource information is the control resources of the system and the features offered by that system.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: March 3, 1992
    Assignee: Motorola, Inc.
    Inventor: Michael D. Sasuta
  • Programmable array logic self-checking system
    Patent number: 5090015
    Abstract: A self checking electronically erasable programmable array logic (EEPAL) that comprises an input receiver, a programmable array, an error detection code storage array, an error detection circuitry, and error signalling circuitry is disclosed. The self checking EEPAL verifies the storage integrity of each cell within the programmable array during the programming of the EEPAL, after completion of programming the EEPAL, and prior to executing the algorithm stored in the EEPAL.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: February 18, 1992
    Assignee: Motorola, Inc.
    Inventors: Ezzat A. Dabbish, Larry C. Puhl, William L. Brendle
  • Knowledge based radio
    Patent number: 5081707
    Abstract: A knowledge based radio that monitors changed operating parameters and environmental conditions, and that selectively varies operating parameters of the radio in response to rules. The rules can be varied over time by the radio based upon the monitored response of the user to various environmental conditions.
    Type: Grant
    Filed: August 8, 1989
    Date of Patent: January 14, 1992
    Assignee: Motorola, Inc.
    Inventors: Eric R. Schorman, Charles W. Bethards
  • Method and means for damping modes of piezoelectric vibrators
    Patent number: 5078834
    Abstract: A method and arrangement for providing damping of undesired modes of piezoelectric vibrators is disclosed that eliminates the tedious and often inaccurate methods of known mass-loading techniques. Instead, the arrangement relies on physically altering a controlled amount of the piezoelectric material located at a predetermined point to effect the selective damping needed to minimize the undesired responses and to minimally interfere with the desired mode of operation.
    Type: Grant
    Filed: May 4, 1989
    Date of Patent: January 7, 1992
    Assignee: Motorola, Inc.
    Inventor: Robert S. Witte
  • Encapsulated field emission device
    Patent number: 5079476
    Abstract: A solid state field emission device having a cathode that is peripherally disposed about the anode and axially displaced with respect thereto. The device itself is encapsulated, readily manufacturable, and has comparable operating properties, vis-a-vis one another when manufactured in quantity.
    Type: Grant
    Filed: February 9, 1990
    Date of Patent: January 7, 1992
    Assignee: Motorola, Inc.
    Inventor: Robert C. Kane
  • Imaging identification method for a communication system
    Patent number: 5073927
    Abstract: In a communication system wherein subscriber units and dispatch consoles are equipped with a display device and an image storage device. By having the communication unit so equipped, the operator of a communication unit can readily identify an operator of a transmitting communication unit by displaying an image of the transmitting communication unit throughout the call.
    Type: Grant
    Filed: August 29, 1989
    Date of Patent: December 17, 1991
    Assignee: Motorola, Inc.
    Inventor: Gary W. Grube
  • Combined alpha-numeric keyboard and display module for a communication system or similar article
    Patent number: D327057
    Type: Grant
    Filed: June 25, 1990
    Date of Patent: June 16, 1992
    Assignee: Motorola, Inc.
    Inventor: Richard H. Gosch