Patents Represented by Attorney, Agent or Law Firm Donald C. Kordich
  • Patent number: 6718170
    Abstract: Microprocessor resources controlling a searching process and other functions in a wireless remote unit are allocated to maintain the link while allowing sufficient microprocessor resources to be allocated to other remote unit functions. A current search rate limit is increase if the microprocessor is not overloaded and the current search rate limit is less than an higher upper limit. The current search rate limit is decreased if the microprocessor is overloaded and the current search rate limit is greater than a lower upper limit. The priority of other tasks is adjusted if the microprocessor is overloaded and the current search rate limit is equal to the lower upper limit.
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: April 6, 2004
    Assignee: Qualcomm Incorporated
    Inventor: Robbin D. Hughes
  • Patent number: 6559809
    Abstract: Embodiments of a planar antenna suitable for use with a portable device for wireless communications are described. One such embodiment includes a microstrip line coupled to a radiating poise on one side of a circuit board, and a ground plane coupled to a structure on the other side of the circuit board that functions as a coplanar waveguide having an effective length of one quarter-wavelength. A further implementation includes a transformer portion configured and arranged to match the impedance of an RF signal source to the antenna driving impedance.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: May 6, 2003
    Assignee: Qualcomm Incorporated
    Inventors: Alireza H. Mohammadian, Ernest T. Ozaki, Patrick J. Conner
  • Patent number: 6160799
    Abstract: An apparatus (100) maintains a Pilot Set in a digital communication system that utilizes Code Division Multiple Access. The apparatus comprises a logic and control circuit (113) for providing instructions to a searcher receiver (109). The searcher receiver, in response to the instructions, sequentially scans active pilots, then candidate pilots, and then pre-candidate pilots. The scan of the pre-candidate pilots continues until all but a predetermined number of pre-candidate pilots have been promoted or demoted. Then the searcher receiver alternately scans the predetermined number of pre-candidate pilots and the neighbor pilots. The searcher receiver terminates alternate scans of the predetermined number of pre-candidate pilots and the neighbor pilots when a one of the neighbor pilots is promoted, and resumes the scan of the pre-candidate pilots.
    Type: Grant
    Filed: September 6, 1996
    Date of Patent: December 12, 2000
    Assignee: Motorola, Inc.
    Inventors: David J. Krause, Brian D. Storm, William F. Taranowski, Michael A. Eberhardt
  • Patent number: 6052595
    Abstract: A system for choosing a communication having an ACRE 117, a radiotelephone 101 and a cordless base station 115. The cordless base station 115 connected to the ACRE 117 by a wireline network 111 and receiving a message authorizing the use of a subset of channels. The cordless base station 115 determining which of the set of channels meets a channel quality criteria and only communicating over a channel, to the radiotelephone 101, if the channel meets the channel quality criteria and is authorized.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: April 18, 2000
    Assignee: Motorola, Inc.
    Inventors: Michael J. Schellinger, Robert F. D'Avello
  • Patent number: 6052592
    Abstract: A call routing system includes an authorization and call routing equipment (ACRE) 117, a cordless base station 115 connected by a wireline network 111 having caller identification. The cordless base station 115 initiates a call to the ACRE 117, which receives the cordless base station's 115 telephone number. The ACRE 117 then uses the telephone number for routing subsequent telephone calls to the cordless base station 115. The cordless base station 115 can receive and store caller indentification information and transmit this information to a radiotelephone 101.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: April 18, 2000
    Assignee: Motorola, Inc.
    Inventors: Michael J. Schellinger, Robert F. D'Avello
  • Patent number: 6041241
    Abstract: A wireless communication device (100) comprises a battery (103) for providing power to the circuitry of wireless communication device (100). Optionally, power can be provided by an external power source, such as an automobile's cigarette lighter, via a plug (115). A power-availability circuit (101) determines an amount of available power from either source. A microprocessor (105) determines a new slot cycle index according to the amount of available power, and wireless communication device (100) is controlled according to the new slot cycle index.
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: March 21, 2000
    Assignee: Motorola, Inc.
    Inventor: William Daniel Willey
  • Patent number: 5987012
    Abstract: A wireless communication device (100) can be handed off while operating in the slotted mode of a CDMA system. The wireless communication device (100) stores, prior to entering slotted mode, an Active Set including at least one active pilot and a Neighbor Set including a plurality of neighbor pilots. At least one receiver searcher (109) scans the at least one active pilot and at least one of the plurality of neighbor pilots prior to an assigned slot. A logic and control circuit (113) includes in the Active Set, prior to the assigned slot, at least two pilots of the at least one active pilot and the at least one of the plurality of neighbor pilots scanned prior the assigned slot. At least two of a plurality of receiver fingers (107) simultaneously monitor the Paging Channels of the at least two pilots during the assigned slot.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: November 16, 1999
    Assignee: Motorola, Inc.
    Inventors: Eugene J. Bruckert, Richard J. Vilmur
  • Patent number: 5974042
    Abstract: A radiotelephone (121) employs a service detection circuit (125) comprising at least one chip-rate detector (109) that measures the energy of the autocorrelation of a received composite CDMA signal and employs a different time delay for each measurement of the energy. A threshold detection circuit (127) combines the measured energies and determines that service is available if the combined energies exceeds a threshold, and determines service is unavailable otherwise. The chip-rate detectors (109) can be coupled in parallel to provide simultaneous measurements of the energy of the autocorrelation of the received composite CDMA signal, or a single chip-rate detector (109) can serially measure the energy of the autocorrelation of the received composite CDMA signal.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: October 26, 1999
    Assignee: Motorola, Inc.
    Inventors: Colin D. Frank, Jennifer A. Honkisz, Brian D. Storm
  • Patent number: 5920550
    Abstract: A wireless communication device (100) continues to measure pilot signal strengths while in the System Access State (220) and provides at least one of the current measured pilot signal strengths to the base station in each access probe (210). A base station (102) receives the current information on pilot signal strengths (305; 320) and the system specifies the base stations for soft handoff according to the current measured pilot signal strengths (315; 340).
    Type: Grant
    Filed: October 11, 1996
    Date of Patent: July 6, 1999
    Assignee: Motorola, Inc.
    Inventor: William Daniel Willey
  • Patent number: 5920549
    Abstract: A wireless communication device (100) can be handed off while operating in the slotted mode of a CDMA system. The wireless communication device comprises a receiver searcher (109) that measures the signal strength of an active pilot prior to the assigned slot and at least one of a plurality of neighbor pilots during an assigned slot. Receiver fingers (107) demodulate a Paging Channel of the active pilot during an assigned slot and can also determine signal strength of pilots simultaneously with the receiver searcher. A Hot Neighbor List is used to prioritize the order in which neighbor pilots are scanned. A logic and control circuit (113) determines if neighbor pilots should be scanned beyond the assigned slot, if the Hot Neighbor List should be modified, and if the wireless communication device should be handed off to another pilot.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: July 6, 1999
    Assignee: Motorola, Inc.
    Inventors: Eugene J. Bruckert, Richard J. Vilmur
  • Patent number: 5889768
    Abstract: A wireless communication device 100 acquires a pilot channel before an assigned slot when the wireless communication device is operating in the slotted mode of a CDMA system. The wireless communication device comprises a searcher receiver 107 that determines the short-term average pilot strength of active and neighbor pilot channels. Finger receivers 107 determine the long-term average pilot strength of the active and neighbor pilot channels. A logic and control circuit 113 assigns the finger receivers to the pilot channels according to their short-term average pilot strength, determines if the long-term average pilot strength of a neighbor channel is greater than the active pilot channel's pilot strength, and determines to hand off to the neighbor pilot channel with the greater long-term average pilot strength. Moreover, an early detection correlation length can be dynamically adjusted according to the pilot strength of the active pilot channel to shorten the pilot acquisition process.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: March 30, 1999
    Assignee: Motorola, Inc.
    Inventors: Brian D. Storm, David J. Krause
  • Patent number: 5878075
    Abstract: An augmenting circuit (153) augments an embedded PN sequence of 2.sup.N -1 chips generated by an N-bit LSSR (111) to provide an augmented PN sequence of 2.sup.N chips and an augmented PN sequence of 2.sup.N chips shifted by D chips. The augmenting circuit comprises a N-bit counter (123) that counts a plurality of clock bits. The N-bit counter provides a pre-carry signal that changes state when the counter's index equals a predetermined value and provides a value of the N-k most-significant-bits (MSB) of the index. A logic circuit (107,119) receives the plurality of clock bits and responds to the pre-carry signal to gate the plurality of clock bits. A comparator (135) receives the value of the N-k MSB and a threshold value to output a select signal that controls a multiplexer (139).
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: March 2, 1999
    Assignee: Motorola, Inc.
    Inventors: Colin D. Frank, Fuyun Ling
  • Patent number: 5867127
    Abstract: A wireless communication device (20) provides a matching state between a radio circuit (28) and an antenna assembly (26) in both its retracted and extended positions, and does so with an elegant design that increases reliability and manufacturability by reducing the number and complexity of components and moving mechanical parts. A matching circuit (30), which is reconfigured according to a switch (32) that is responsive to the antenna's position, provides the matching states. Furthermore, the switch (32) can be integrally formed as part of a feed terminal (36), the feed terminal (36) and a ground terminal (38) can hold the antenna in position, and the ground terminal (38) can hold a guiding tube (52). Alternatively, the switch (32) can include a diode (102) and a sensor. The sensor is a rod (46) of the antenna assembly that makes and breaks an electrical path between the feed terminal and the ground terminal to change the state of the diode.
    Type: Grant
    Filed: September 11, 1997
    Date of Patent: February 2, 1999
    Assignee: Motorola, Inc.
    Inventors: Gregory R. Black, Jason D. Millard, Richard J. Dombrowski
  • Patent number: 5854785
    Abstract: A wireless communication device (100) provides for soft handoff in a communication system employing CDMA by providing information on pilot identities to the base station represented by the active pilot in the access probe (215), and possibly in successive access probes. The system infrastructure allocates base stations according to the pilot identities (310) and transmits messages over the Paging Channels of the base station of the active pilot and neighboring base stations represented by the pilot identities (315). Thus, the wireless communication device can simultaneously demodulate the Paging Channel of multiple base stations while in the System Access State of CDMA.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: December 29, 1998
    Assignee: Motorola, Inc.
    Inventor: William Daniel Willey
  • Patent number: 5848072
    Abstract: A data-transmission system (100) including a master device (101) and at least one slave device (105) communicates messages having an address (1503, 1505) and data (1100) from the slave device (105) to the master device (101). The address (1503, 1505) is communicated synchronously and the data (1100) is communicated asynchronously. Furthermore, the address (1503, 1505) determines the control information and timing signal transmitted by the master device (101) to the slave devices (105-N).
    Type: Grant
    Filed: August 10, 1995
    Date of Patent: December 8, 1998
    Assignee: Motorola, Inc.
    Inventors: Mark E. Prill, Robert K. Krolopp
  • Patent number: 5812093
    Abstract: A retractable antenna assembly provides a substantially matched antenna impedance to a matching circuit (712) of a radiotelephone (200) whether the retractable antenna assembly is in the extended position or the retracted position. In one embodiment parts (304, 312) of a capacitor (714) are integrally formed on an upper portion of the retractable antenna assembly (206) such that when in the retracted position the capacitor (714) contributes to the overall antenna impedance. In another embodiment a capacitor (1302) is integrally formed on the lower portion of the retractable antenna assembly (900).
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: September 22, 1998
    Assignee: Motorola, Inc.
    Inventors: David C. Thompson, Jin D. Kim, Jon J. Powles
  • Patent number: 5701244
    Abstract: An uninterruptible power supply (UPS) (100) has a housing (111) that supports the major electrical components of the UPS (100), i.e., a transformer circuit (207), a switching circuit (217), and a battery (209). Furthermore, a connector (107;115;117) affixed to the housing (111 ) is capable of removably affixing the UPS (100) to an alternating-current (AC) outlet (102).
    Type: Grant
    Filed: October 26, 1995
    Date of Patent: December 23, 1997
    Assignee: Motorola, Inc.
    Inventors: Steven C. Emmert, Louis J. Lundell, Michael P. Murray
  • Patent number: D384662
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: October 7, 1997
    Assignee: Motorola, Inc.
    Inventors: Albert L. Nagele, Leonid Soren, Michael P. McAndrews, Chris A. Murzanski
  • Patent number: D393470
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: April 14, 1998
    Assignee: Motorola, Inc.
    Inventors: Albert L. Nagele, Chris A. Murzanski
  • Patent number: D397337
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: August 25, 1998
    Assignee: Motorola, Inc.
    Inventors: Phillip E. Lindeman, Steven M. Mina, Thomas E. Paulick