Patents Represented by Attorney, Agent or Law Firm Lalita P. Williams
  • Patent number: 6895033
    Abstract: A first sequence state storage module (20) periodically stores a present state (22) of a long code generator (30). Following a restoration of power after a power cut condition, or following the termination of any other interruption of the generation of the long code, a sequence recovery module (50) then provides an updated present state (36). The updated present state (36) is based upon a stored present state (24) and a time value (52) that is reset whenever the present state (22) of the long code or other sequence is stored and that is available even when the long code or other sequence is interrupted.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: May 17, 2005
    Assignee: Motorola Inc.
    Inventors: Brian Storm, Scott Alan Steele, Jeremy Jacobson, Richard Koss, William P. Alberth, Jr., Sabrina Bahadori
  • Patent number: 6631127
    Abstract: A method 600 of selecting an ARQ method for retransmitting a data frame based on an accumulated signal to noise ratio (SNR) of systematic bits in the data frame at a receiving unit 508. The sending unit 500 tracks the accumulated SNR of systematic bits by using channel SNR measurement reports sent by the receiving unit 508. The method utilizes Chase combining of re-transmitted systematic bits (via Partial incremental redundancy transmissions) until the accumulated SNR of the systematic bits has reached a suitable value, and then switches to sending only parity bits (via Full incremental redundancy) in retransmissions. In addition, the method alters the allocation of resources, such as code power, to provide only that necessary for successful decoding of the transmitted frame. The sending unit 500 informs the receiving unit 508 of the type of transmission, number of the transmission and/or resource allocation associated with the data frame.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: October 7, 2003
    Assignee: Motorola, Inc,
    Inventors: Mansoor Ahmed, Kamyar Rohani, Kevin M. Laird
  • Patent number: 6529748
    Abstract: Method and apparatus for transmitting handshaking signals between two peer devices using only two signal lines. The apparatus is symmetrical in that either peer device uses substantially the same signals and logic states to rouse the other. Only two handshaking signals are defined, but each handshaking signal has a dual meaning that is determined by various intermediate logic states in each peer device. Thus, the same signal that is generated by peer device A and sent to peer device B to tell peer device B that peer device A is awake and ready to receive a data transmission, is also generated by peer device A and transmitted to peer device B to request peer device B to wake up.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: March 4, 2003
    Assignee: Motorola, Inc.
    Inventor: John David Bruner
  • Patent number: 6460612
    Abstract: A heat pipe and method that utilizes a multi-layered shape memory alloy (SMA) as the wick structure. Each layer has a different transformation temperature. The inner layer of the SMA begins contracting first when heat is applied along the surface of the heat pipe. The contraction reduces the effective capillary radius rc of the wick, thereby maintaining or increasing the capillary pumping pressure and thus the ability to remove heat. As the temperature of the heat pipe continues to rise, the outer layer begins contracting to reduce the capillary radius further. As a result, the local pumping pressure is maintained or even increased to accommodate higher local heat flux and remove the heat to prevent “dry-out.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: October 8, 2002
    Assignee: Motorola, Inc.
    Inventors: Maninder S. Sehmbey, James P. Chen
  • Patent number: 6442389
    Abstract: A communication system via the aid of a mobile station (195) and a computing device (150) determines value of an offset factor. Mobile station (195) measures a pilot signal strength transmitted from one of the base stations (160, 170, 180), changes value of the measured pilot signal strength according to the value of the offset factor, and reports the changed pilot signal strength in substitute of the pilot signal strength to one of the base station responsible for transmission of the pilot signal. Upon satisfactory performance, offset factor, at the base station, modifies the values of a common set of parameters that includes a threshold add and threshold comp to be used subsequently for all mobile stations.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: August 27, 2002
    Assignee: Motorola, Inc.
    Inventor: Rodney Edward Marcum
  • Patent number: 6415252
    Abstract: Bits are allocated to short-term repetition information for unvoiced input signals. Stated differently, more bits are allocated for pitch information during unvoiced input speech than in the prior art. The improved method and apparatus in an encoder (300) and decoder (700) result in improved consistency of amplitude pulses compared to prior art methods which indicates improved stability due to increased search resolution. Also, the improved method and apparatus result in higher energy compared to prior art methods which indicates that the synthesized waveform matches the target waveform more closely, resulting in a higher fixed codebook (FCB) gain.
    Type: Grant
    Filed: May 28, 1998
    Date of Patent: July 2, 2002
    Assignee: Motorola, Inc.
    Inventors: Weimin Peng, James Patrick Ashley
  • Patent number: 6396890
    Abstract: A frequency synthesizer of the phase locked loop type and particularly useful for frequency hopping applications includes means (8) for achieving fast frequency and phase lock. In one embodiment the synthesizer is steered to a new frequency value by a DAC 10 which controls a VCO (5) input voltage. Subsequently, the phase of the synthesizer output is locked to that of the reference frequency oscillator (1) by resetting the feedback frequency divider (6) at the point in time when a rising edge of the reference frequency is detected. In a second embodiment, rapid frequency and phase lock is achieved by resetting the feedback frequency divider (6) on every rising edge of the reference frequency while the feedback loop is disabled, until the detected phase difference between the reference frequency and the divided VCO frequency reaches a minimum value.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: May 28, 2002
    Assignee: Motorola, Inc.
    Inventor: Neil William Ashley Turner
  • Patent number: 6389285
    Abstract: A self-adaptive handover determination device (5) functions by taking into account by how much a handover threshold is exceeded based on a received quality or signal strength measurement. Averaged signal measurements are compared (7) with a first threshold (8) and those exceeding it are summed (9) and further compared (10) with a second threshold (11) which sets the handover trigger level. The invention has the advantages of a reduced call drop rate and of enabling a fast handover when the communication's link suffers a rapid deterioration in quality.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: May 14, 2002
    Assignee: Motorola, Inc.
    Inventors: Javier Escamilla, Javier Munoz Vidal, Pedro Guerediaga Escribano
  • Patent number: 6366880
    Abstract: A noise suppression system implemented in communication system provides an improved level of quality during severe signal-to-noise ratio (SNR) conditions. The noise suppression system, inter alia, incorporates a frequency domain comb-filtering (289) technique which supplements a traditional spectral noise suppression method. The invention includes a real cepstrum generator (285) for an input signal (285) G(k) to produce a likely voiced speech pitch lag component and converting a result to frequency domain to obtain a comb-filter function (290) C(k), applying input signal (291) G(k) to comb-filter function (290) C(k), and equalizing the energies of the corresponding pre and post filtered subbands, to produce a signal (293) G″(k) to be used for noise suppression. This prevents high frequency components from being unnecessarily attenuated, thereby reducing muffling effects of prior art comb-filters.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: April 2, 2002
    Assignee: Motorola, Inc.
    Inventor: James Patrick Ashley
  • Patent number: 6347140
    Abstract: In a communication system (100), a first echo return loss through communication system (100) associated with a first call connection between a caller (111) and a first caller (114) is estimated. A second echo return loss associated with a second call connection between caller (111) and a second caller (112) is estimated. The call connection may be switching from the first call connection to the second call connection after estimating the first echo return loss, and from the second call connection to the first call connection after estimating the second echo return loss. Echo generated in the first call connection is cancelled based on at least the first echo return loss by an echo canceller in communication system (100) after switching from the second call connection to the first call connection.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: February 12, 2002
    Assignee: Motorola, Inc.
    Inventors: Mansour Tahernezhaadi, Michael J. Kirk
  • Patent number: 6347228
    Abstract: Apparatus for determining the location of a subscriber unit (1) in a mobile telecommunications network, and particularly in a GSM cellular network, includes the provision of several receiver stations (4, 5, 6) positioned at separate known locations within each cell. Each of the receiver stations (4, 5, 6), which are synchronised by means of an on-board GPS receiver (10), measures the time of arrival of a message transmitted from the subscriber unit (1). The time of arrival measurements recorded by each receiver station (4, 5, 6) are then transmitted to a base transceiver station (2) for computation of the subscriber unit's location relative to the receiver stations. The apparatus can provide a reasonably accurate means for location with a low susceptibility to interference.
    Type: Grant
    Filed: June 8, 1999
    Date of Patent: February 12, 2002
    Assignee: Motorola, Inc.
    Inventors: Brendan Patrick Ludden, Luis Lopes
  • Patent number: 6320477
    Abstract: An energy coupler (10) includes a movably adjustable energy coupling sleeve (16), and a coupling transmission line (18) operatively coupled to the movably adjustable energy coupling sleeve (16) to provide adjustable coefficient coupling with a transmission line (14), such as a coaxial transmission line. In one embodiment, the movably adjustable energy coupling sleeve (16) is configured to rotatably move to provide selectable energy coupling with the coaxial transmission line (14).
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: November 20, 2001
    Assignee: Motorola, Inc.
    Inventors: Robert D. Lithgow, Hong Gan, Miles Tusa
  • Patent number: 6321073
    Abstract: An automatic gain control apparatus (106) and method for a radiotelephone receiver employs stored inverse transfer function data (400) of the radiotelephone receiver and a gain estimation circuit (200). The gain estimation circuit (200) estimates the input power of received signal (103) and determines a required gain based on a nonlinear portion of the inverse transfer function data (400) of the radiotelephone receiver to provide an improved dynamic range of the receiver. The apparatus and method performs convergence within one iteration to perform fast gain control. In addition, if desired, a DC offset compensation circuit, such as a feedforward DC offset compensation circuit (202), compensates the digital representation of the input signal for use by the gain estimation circuit (200).
    Type: Grant
    Filed: January 31, 2000
    Date of Patent: November 20, 2001
    Assignee: Motorola, Inc.
    Inventors: Yuda Y. Luz, Ariel Luzzatto, Dean E. Thorson
  • Patent number: 6317087
    Abstract: An antenna detent and latching mechanism (300) for coupling to a radiotelephone and mating with a radiotelephone antenna stem (200) is provided. The antenna detent and latching mechanism (300) includes a bottom plate (380) for mounting the mechanism in the radiotelephone, a bearing plate (360) coupled to the bottom plate, a detent follower (373) coupled to the bearing plate (360) and engaging a plurality of detents (366, 368, 370) in the bearing plate (360), and a detent spring (374) coupled to the detent follower (373) and providing force against the detent follower (373). The detent spring (374) is preferably a substantially flat leaf spring. The detent follower (373) preferably has a plurality of detent spring contact surfaces (377, 378). The detent spring (374) may be supplemented with additional detent springs (375).
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: November 13, 2001
    Assignee: Motorola, Inc.
    Inventors: John Chip Laugal, Kenneth John Roback, Fredrick C. Becker
  • Patent number: 6307846
    Abstract: The method operates in a wireless communication system (100) that includes a paging channel (202) and a plurality of quick paging channels (204). A plurality of paging channel time slots (206) are defined within the paging channel, and a plurality of quick paging channel time slots (208) are defined within the quick paging channels. The method includes determining paging indicators (210) in a quick paging channel time slot; determining if there is a time collision (304) between paging indicators that would be set on different quick paging channels; selecting a message associated with one of the paging indicators involved in the time collision; and canceling the selected message, or rescheduling the selected message such that the message is sent in a subsequent paging channel time slot.
    Type: Grant
    Filed: February 24, 2000
    Date of Patent: October 23, 2001
    Assignee: Motorola, Inc.
    Inventor: William Daniel Willey
  • Patent number: 6298082
    Abstract: In a method for producing antenna element signals for transmitting a serial traffic channel from a plurality of elements in an antenna array, data in the serial traffic channel is converted to data in two or more parallel traffic channels. Thereafter, data in the two or more parallel traffic channels are spread with different spreading codes to produce spread traffic signals. The spread traffic signals are combined to produce combined signals, which are each modified according to adaptive array weights to produce element signals. A pilot signal is then added to at least one of the element signals to produce two or more antenna element signals.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: October 2, 2001
    Assignee: Motorola, Inc.
    Inventor: Robert Mark Harrison
  • Patent number: 6286032
    Abstract: A communication network (100) includes a first server (124) and a second server, such as any of the servers (121-23), connected via a common network (101). First server (124) owns a record data (180) associated with at least one process running for serving a client device (174.) The second server keeps a copy of the record data. First server (124) performs a Hashing function over record data (180) to produce a first Hash value. The second server similarly performs the same or similar Hashing function over the copy of the record data to produce a second Hash value. First server (124) sends the first Hash value to the second server for comparison. If the first Hash value fails to match to the second Hash value, a latest copy of the record data (180) is sent from first server (124) to the second server upon request.
    Type: Grant
    Filed: October 5, 1999
    Date of Patent: September 4, 2001
    Assignee: Motorola, Inc.
    Inventors: Lewis B. Oberlander, Randall R. Stewart, Qiaobing Xie
  • Patent number: 6278879
    Abstract: The method includes receiving (402) at the base station a handover indication associated with a first mobile communication unit. Based on the handover indication, a desired handover power level for the first mobile communication unit is determined (404). Based on the desired handover power level, a communication link is established with the first mobile communication unit at an actual power level. A difference between the desired handover power level and the actual power level is calculated (406), and based on the difference, a transmit power of the base station is determined.
    Type: Grant
    Filed: September 22, 1998
    Date of Patent: August 21, 2001
    Assignee: Motorola, Inc.
    Inventors: Gary E. Western, Dennis Gilliland, Florentino Orda
  • Patent number: 6259491
    Abstract: A touchscreen (126) for assembly onto a liquid crystal display module (119) in a wireless communication device (103). The touchscreen is comprised of a front laminant pet film (127), a chemically strengthened glass panel (129), an optically clear acrylic adhesive (131) and a rear laminant pet film (133). The rear laminant pet film (133) greatly increases the strength and durability of the touchscreen (126) and eliminates the need for a protective lens over the display module of the wireless communication device (103).
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: July 10, 2001
    Assignee: Motorola, Inc.
    Inventors: Christine Ann Ekedahl, Robert Stinauer
  • Patent number: D466497
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: December 3, 2002
    Assignee: Motorola, Inc.
    Inventors: Harold Levern Wikel, Huy Phoung Nguyen