Patents Represented by Attorney, Agent or Law Firm Sharon K. Coleman
  • Patent number: 6823185
    Abstract: Authorized intercepts of communications in a satellite communications system (10) are performed, according to which a law enforcement agency (LEA) can request the intercept of communications to and/or from subscriber units (SUs). In one embodiment, an LEA intercept request causes an intercept order for a particular target SU (420, FIG. 6) to be transmitted to one or more satellites (411-413, FIG. 6), where the intercept order is stored in an intercept table (410). Any communications traffic involving the target SU results in an intercept by a satellite, which routes a copy of the intercepted communications to the requesting LEA, either directly or via an associated intercept facility (426, FIG. 8).
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: November 23, 2004
    Assignee: Motorola, Inc.
    Inventors: Erwin Perry Comer, William Henry Ruppert, Pamela Tam Carmony
  • Patent number: 6642894
    Abstract: An airborne repeater antenna array (70) in which beams transmitted from multiple antenna elements (80) of the array to form terrestrial communications. cells are shaped according to predetermined system parameters. At least one of airplane telemetry data (58) indicating an airplane flight pattern location, adjacent cellular system beam footprint data, and call distribution load within a terrestrial cell are received, and a complex gain is dynamically computed for each of the multiple antenna elements based on such data to thereby output a plurality of beams that form desired geographic communications coverage cells (100, 102, 104, 108).
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: November 4, 2003
    Assignee: Motorola, Inc.
    Inventors: Jonathan H. Gross, Duke E. Hanson, Thomas Peter Emmons, Jr., James W. Startup
  • Patent number: 6366775
    Abstract: A method and apparatus for acquiring satellite signals and subscriber unit signals utilizes broadcast beams (205) and acquisition beams (215) projected from a satellite (20). The broadcast beams (205) and acquisition beams (215) form broadcast acquisition beam pairs that are swept within the footprint (50) of the satellite (20) on the surface of the earth. Broadcast bursts are transmitted by the satellite (20) in the broadcast beams (205), and acquisition bursts broadcast by subscriber units (30) are received by the satellite (20) in acquisition beams (215).
    Type: Grant
    Filed: March 8, 1999
    Date of Patent: April 2, 2002
    Assignee: Motorola, Inc.
    Inventors: James W. Startup, Jim E. Helm, Shawn Wesley Hogberg
  • Patent number: 6301239
    Abstract: A multiple access and data channel scheme is presented for reducing network communication collisions and susceptibility to jamming signals in a distributed network to increase network connectivity and communication throughput. An order wire channel (202) is used to gain access to a data channel (204). To gain access to the data channel (204), a source radio sends a transmit probe (TXP) over the order wire channel (202) to the target radio. The target radio senses its environment and responds with a receive probe (RXP) which comprises data channel transmission parameters including the data channel frequency, transmit power, spread code, and transit timing to be used for the data transmission. Source radio moves to the data channel using the data channel transmission parameters specified by the receive probe (RXP) to communicate with the target radio. If a collision occurs of the order wire channel (202), the source radio retransmits the transmit probe after a random time period.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: October 9, 2001
    Assignee: Motorola, Inc.
    Inventors: Jeffery Scott Chuprun, Margaret Reed Ennis, David Michael Harrison
  • Patent number: 6301265
    Abstract: A system and method for determining operating parameters to control a communication rate for an adaptive rate communication system includes a transmitter (101) to transmit a signal (135) through a network (142) to a receiver (103). The receiver (103) determines operating parameters based on, among other things, packet information from a received signal (e.g., packet). The receiver conveys the operating parameters to the transmitter for use in subsequent communications from the transmitter (101) to the receiver (103).
    Type: Grant
    Filed: August 14, 1998
    Date of Patent: October 9, 2001
    Assignee: Motorola, Inc.
    Inventors: John Kleider, Bruce Alan Fette, William Michael Campbell, Cynthia Ann Jaskie
  • Patent number: 6226493
    Abstract: A geosynchronous satellite system (10) uses crosslinks (30) between geosynchronous satellites (16) which travel along the same ground path (18) or are located within a common orbital slot (32) in order to increase traffic-carrying capacity and decrease signal delays. The geosynchronous satellites (16) can have substantial angles of inclination to provide high quality coverage within a wide range of latitudes (40, 42). In addition, the orbits can be elliptical, resulting in concentrated network capacity in either the northern or southern hemisphere. For co-positioned satellites (171-174), orbit perturbations are introduced in order to eliminate crosslink blockage caused by intervening satellites (172, 173). Methods for deploying and operating the geosynchronous satellite system enable network capacity to be modified (708) and routing (804), crosslinks (1008), and handoffs (908) to be controlled.
    Type: Grant
    Filed: May 31, 1996
    Date of Patent: May 1, 2001
    Assignee: Motorola, Inc.
    Inventors: Raymond Joseph Leopold, Dennis Paul Diekelman
  • Patent number: 6177298
    Abstract: An ESD protection circuit (11) includes a low capacitance diode (26), a voltage divider, a trigger transistor (16), and an SCR. Reducing the capacitance associated with the diode (26) makes the ESD protection circuit particularly suitable for RF applications. To form a low capacitance diode, the parasitic junction capacitance of the diode (26) is hidden in a like-doped well; for example, an N+ cathode (54) of the diode (26) may be folded or formed partially in an N-well (53). Because the N-well (53) does not form a junction with the N+ cathode, the junction capacitance associated with the portion of the N+ well lying inside the N-well is hidden or canceled by the N-well (53), thereby reducing the overall capacitance of the diode (26).
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: January 23, 2001
    Assignee: Motorola, Inc.
    Inventor: John H. Quigley
  • Patent number: 6173176
    Abstract: A communication system (10) has multiple satellites (20) communicating with ground stations (30) and with base stations (40). The satellites (20) are in non-geosynchronous orbit around the earth (52). A first ground station (30) transmits a data packet to a satellite (20). The data packet includes a sector number which represents an area on the earth (52) where the destination ground station (31) is located. The satellite (20) transmits the data packet to another satellite (20) if the satellite (20) is not serving an area identified by the sector number. This step is repeated until the data packet reaches a most likely satellite (20) that is most likely to be serving the area identified by the sector number. The most likely satellite (20) transmits the data packet to the destination ground station (31) if it is still serving the area identified by the sector number.
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: January 9, 2001
    Assignee: Motorola, Inc.
    Inventors: William R. Worger, Craig Long
  • Patent number: 6160280
    Abstract: A field effect transistor structure which can serve as a low noise amplifier. The field effect transistor has a major surface and source and drain regions extending from the major surface into a body of semiconductor material. A channel region is formed in a portion of the body of semiconductor material separating the source and drain regions. The channel region has a first boundary perpendicular to the major and contiguous with the source region, a second boundary parallel to the first boundary and contiguous with the drain region, a third boundary perpendicular to the first boundary, and a fourth boundary parallel to the channel region. A first portion of the channel region is enclosed by a first border parallel to the first boundary of the channel region, a second border parallel to the second boundary of the channel region, a third boundary of the channel region, and the fourth boundary of the channel region.
    Type: Grant
    Filed: March 4, 1996
    Date of Patent: December 12, 2000
    Assignee: Motorola, Inc.
    Inventors: Fred H. Bonn, George B. Norris, John Michael Golio
  • Patent number: 6151308
    Abstract: A method and apparatus for communicating between wireless communication devices (120, 131, 140) uses a high-altitude communication platform (110) to provide an interface between the devices. The platform (110) enables multiple signals from multiple sources to be combined into one signal which is sent to a ground device (120). The ground device (120) can send a combined signal to the platform (110) which the platform (110) can then separate and send to multiple destinations. The platform (110) can be used as a bridge between satellites (1310, 1312) which are incapable of direct communication, thus enabling a fully connected network to exist without full coverage from satellites.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: November 21, 2000
    Assignee: Motorola, Inc.
    Inventors: Rodrigo Ibanez-Meier, Vijay Kapoor, Sergio Aguirre
  • Patent number: 6151344
    Abstract: Automatic power control of a semiconductor laser (12, 72) is achieved by monitoring the spontaneous lateral emissions from the semiconductor laser and adjusting the drive signal to the laser based on the detected emissions. A lateral detector (13, 73) generates a photocurrent from the spontaneous emissions. The detector signal (Ilat) is compared to a reference signal (Iref) and the difference is applied to the drive signal (Ilas) to alter or control the laser output. The magnitudes of the reference signal source and the drive signal source are determined and set based on the desired optical output power of the semiconductor laser measured at a series of temperatures.
    Type: Grant
    Filed: March 30, 1998
    Date of Patent: November 21, 2000
    Assignee: Motorola, Inc.
    Inventors: Philip Kiely, Paul R. Claisse
  • Patent number: 6101145
    Abstract: The occurrence of invalid data transitions on an output data bus (17) are reduced with an improved data sensing circuit (20). In a single block memory application, a self-controlled sense amplifier (21) eliminates the need for external timing control signals by triggering off the rail-to-rail voltage swings of a complementary bit line pair (BIT, BITB) of a memory array coupled to the inputs of the amplifier (21). Triggering off the bit lines (BIT, BITB) ensures that the amplifier (21) is not activated until valid data appears at its input, thereby preventing glitches on the output data bus (17) due to the amplifier (21) or associated latch (13). In a multiblock memory application, the data sensing circuit is further improved by eliminating invalid data transitions from appearing on the output data bus (17) through use of feedback.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: August 8, 2000
    Assignee: Motorola, Inc.
    Inventor: James W. Nicholes
  • Patent number: 6090151
    Abstract: A process (20) and design tool (62) are presented for the accurate prediction of design parameters (42) for components (38) of an integrated circuit (22) during the early stages of the design of that integrated circuit (22). These predicted design parameters (42) include pin count parameters (50), propagation delay parameters (52), layout area parameters (54), dynamic power parameters (56), static power parameters (58), and total power parameters (60). With these parameters, the designer interactively modifies the design prior to the layout and prototyping of the integrated circuit (22). The dynamic power parameters (56) and total power parameters (60) may be repetitively predicted with differing input items to establish a power usage pattern for the integrated circuit (22).
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: July 18, 2000
    Assignee: Motorola, Inc.
    Inventors: John B. Gehman, Kerry Lucille Johns-Vano, Colleen Kane Steward
  • Patent number: 6088214
    Abstract: An array (100) of voltage variable capacitors (110) is provided in which voltage variable capacitors (110) are fabricated with piezoelectric displacement devices (150). Voltage variable capacitors (110) have first plates (120) which are coupled to displacement devices (150). First plates (120) are dielectrically coupled to second plates (130). Displacement device (150) has a stack of metallic layers (154), voltage variable material blocks (152), and voltage supply terminals (170) and (180). Voltage differences are established across voltage variable material blocks (152) using voltage supply terminals (170) and (180). A voltage difference causes a voltage variable material layer to change thickness, and this causes first plate (120) to move relative to second plate (130). Voltage variable material is selected from a group of piezoelectric ceramics, which can include lead-titanate (PbTiO.sub.3), lead-zirconate (PbZrO.sub.3), barium-titanate (BaTiO.sub.3), and lead-zirconate-titanate (PbZr.sub.x Ti.sub.1-x O.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: July 11, 2000
    Assignee: Motorola, Inc.
    Inventors: Hugh Robert Malone, James R. Phillips, Donald W. Forst, Deborah Sue Dendy, Dean Lawrence Cook
  • Patent number: 6075484
    Abstract: A direction of arrival (DOA)-aided digital beamforming (DBF) subsystem (300 FIG. 3) is provided for mitigating interference and increasing the frequency reuse factor in communication systems. The DOA-aided DBF subsystem is used to accurately position beams and nulls in at least one antenna beam pattern. By accurately directing beams at desired locations and nulls at undesired locations, the DOA-aided DBF subsystem provides a more efficient processing of antenna beam patterns in communication systems. The DOA-aided DBF subsystem is used in geostationary satellites, non-geostationary satellites, and terrestrial communication devices. The DOA-aided DBF subsystem uses a unique algorithm to determine DOA information that allows more efficient beam management and allows more subscribers to be served, while saving spectrum and power.
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: June 13, 2000
    Assignee: Motorola, Inc.
    Inventors: Sam Mordochai Daniel, Stephen Chihhung Ma
  • Patent number: 5999567
    Abstract: Methods and apparatus for recovering a desired signal from a composite signal. In one method, sample-based information maximization techniques for blind deconvolution are utilized to learn a filter (22) which removes undesired dependencies from the composite signal. Entropy as an expectation over individual samples of the composite signal is maximized. In another method, dependencies of the composite signal are selectively removed by learning a first filter (42) that removes the desired dependencies and outputs a filtered signal. The filtered signal is used as the learning material for a second filter (44) such that the second filter learns to remove only the remaining dependencies (undesired dependencies) from the filtered signal. The composite signal is applied to the second filter (44) which thereby removes the undesired dependencies.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: December 7, 1999
    Assignee: Motorola, Inc.
    Inventor: Kari Torkkola
  • Patent number: 5994161
    Abstract: A non-zero temperature coefficient of offset (Tco) in a semiconductor device (5) is adjusted by reducing the amount of adhesive material used to secure a first structure to a second structure. An adhesive layer (14) used to secure a sensor die (11) to a constraint die (12) in a pressure sensor application is reduced in thickness and/or formed so that adhesive material does not completely cover the constraint die (12). The Tco is further adjusted by reducing the amount and/or patterning the adhesive layer (18) used to secure the sensor (10) to its package (16).
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: November 30, 1999
    Assignee: Motorola, Inc.
    Inventors: Gordon D. Bitko, Andrew C. McNeil, David J. Monk
  • Patent number: 5959966
    Abstract: Multiple digital radio signals transmitted simultaneously at the same frequency are separated and the source signals recovered using blind source separation techniques. RF signals are received at a communications station (20) and downconverted to baseband signals. Blind Source Separation (BSS) based processes are applied to the baseband signals prior to demodulation to recover the source signals. To recover the source signals, a probability density function (PDF) model of the baseband source signal is generated (step 12) and an adaptation equation produced in accordance with the particular PDF model and BSS process (step 14). Using the known PDFs provides quicker adaptation to dynamic conditions. A separation matrix is learned by applying the adaptation equation to the baseband signals (step 16) and applied to the baseband signals to recover the source signals (step 18).
    Type: Grant
    Filed: June 2, 1997
    Date of Patent: September 28, 1999
    Assignee: Motorola, Inc.
    Inventor: Kari Torkkola
  • Patent number: 5951893
    Abstract: Heater circuits (13) are placed in close proximity or integrated with connection points (12) of an integrated circuit. A connection point is an area where a wire bond or conductive bump is coupled for providing electrical interconnection external to an integrated circuit. Heater circuits (13) are polysilicon strips that form resistive heat elements. A DC voltage or a pulsed voltage is applied to the heater circuits (13) to generate a local heat at the connection points that can reach temperatures exceed 1000 degrees centigrade. The heat is localized to an area near the connection point to prevent damage to temperature sensitive material. The heater circuits (13) raise the temperature of the connection points (12) to increase bond strength of a wire bond or to reflow a conductive bump to adhere to a connection point of another substrate.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: September 14, 1999
    Assignee: Motorola, Inc.
    Inventors: Gordon Bitko, Gary O'Brien
  • Patent number: 5936390
    Abstract: A control circuit for controlling a current switch to provide current to a load circuit, includes a hysteresis trigger circuit arranged to selectively switch on the current switch in dependence upon a control signal. A transistor is arranged to selectively provide an operating current to the hysteresis trigger circuit in dependence upon the control signal. In this way operating current is only supplied to the hysteresis trigger circuit when the control signal is high, such that the load circuit does not draw current when the control signal is low.
    Type: Grant
    Filed: January 20, 1998
    Date of Patent: August 10, 1999
    Assignee: Motorola, Inc.
    Inventor: Thierry Sicard