Patents Represented by Attorney Russell B. Miller
  • Patent number: 5982315
    Abstract: A bandpass .SIGMA..DELTA. DC utilizing either a single-loop or a MASH architecture wherein the resonators are implemented as either a delay cell resonator, a delay cell based resonator, a Forward-Euler resonator, or a two-path interleaved resonator. The resonator can be synthesized with analog circuit techniques such as active-RC, gm-C, MOSFET-C, switched capacitor, or switched current. The switched capacitor or switched current circuits can be designed using single-sampling, double-sampling, or multi-sampling circuits. The non-stringent requirement of a .SIGMA..DELTA. ADC using switched capacitor circuits allows the ADC to be implemented in a CMOS process to minimize cost and reduce power consumption. Double-sampling circuits provide improved matching and improved tolerance to sampling clock jitter. In particular, a bandpass MASH 4-4 .SIGMA..DELTA. ADC provides a simulated signal-to-noise ratio of 85 dB at an oversampling ratio of 32 for a CDMA application. The bandpass .SIGMA..DELTA.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: November 9, 1999
    Assignee: QUALCOMM Incorporated
    Inventors: Seyfollah S. Bazarjani, Saed G. Younis
  • Patent number: 5983099
    Abstract: In a push-to-talk dispatch system, a method and apparatus for providing an accelerated response to a push-to-talk origination message. A first base station allocates a first set of equipment to support a push-to-talk connection. A first system controller allocates a second set of equipment to support the push-to-talk connection. Upon receipt of a push-to-talk origination message from a first remote unit, the first base station transmits an immediate response to the first remote unit, instructing it to communicate through the first set of equipment and the second set of allocated equipment.
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: November 9, 1999
    Assignee: Qualcomm Incorporated
    Inventors: Yu-Dong Yao, Matthew S. Grob, Eric J. Levken, Katherine W. White
  • Patent number: 5983383
    Abstract: In a concatenated code data, correctly decoded code words from a block decoder is utilized to improve the performance of the convolutional decoder. A code word can sometimes be correctly decoded prior to receipt of all the symbols for the code word. Early decoding of the code word allows for the correct recreation of the entire code word, even the symbols which have not yet been received. The entire corrected code word is used by the convolutional decoder to eliminate branches the trellis, thus improving decoding of prior data bits and future data bits in the trellis. The chain back distance of the convolutional decoder can also be made shorter based on the knowledge that some of the received code words have been correctly decoded. Finally, the parity symbols which have not yet been received for the correctly decoded code word can be eliminated from transmission to improve the overall transmission rate.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: November 9, 1999
    Assignee: Qualcom Incorporated
    Inventor: Jack K. Wolf
  • Patent number: 5982760
    Abstract: The present invention provides a method and apparatus for providing improved power control in a closed-loop communication system. A base station monitors a quality of a feedback link between it and a mobile station under a variety of methods. When a quality of the feedback link becomes unacceptable, the base station and the mobile station enter into an alternative mode of operation, adjusting from a fast power control feedback mode (with a high bandwidth feedback channel and low power control delay), to a slow power control feedback mode (with a low bandwidth feedback channel or a long power control delay). The mobile station adjusts a rate or content of power control messages it feeds back to the base station under a variety of methods. Under this alternative mode, the mobile station increases a power of its feedback signals. Additionally, if the mobile station is in a soft handoff condition, it similarly increases a power of its feedback signals.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: November 9, 1999
    Assignee: Qualcomm Inc.
    Inventor: Tao Chen
  • Patent number: 5978413
    Abstract: A method and system incorporating the use of interference cancellation during synchronized demodulation of a code division multiple access (CDMA) signal is described. A wireless communications receiver uses synchronized demodulation techniques to estimate the data contained in multiple orthogonal sub-channels of multiple CDMA signals. In response to these estimates an ideal waveform is constructed for each CDMA signal. These ideal waveforms are subtracted from the original signal received to form an interference-cancelled version of the original signal which is used when demodulating individual orthogonal sub-channels.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: November 2, 1999
    Inventor: Paul E. Bender
  • Patent number: 5978679
    Abstract: A novel and improved method and apparatus for switching the radio interface layer of a wireless telephone call from code division multiple access (CDMA) cellular to GSM time division multiple access (TDMA) cellular during the course of that telephone call or other communication is described. In accordance with one embodiment of the invention, a set of base stations operating in accordance with the GSM standard generate pilot beacons signals in accordance with CDMA technology. During a phone call, a subscriber unit detects CDMA pilot signals, and notifies a base station controller when CDMA pilot signals are detected and the strength at which they are received. The base station controller identifies CDMA pilot signals from CDMA pilot beacon, and initiates a CDMA to GSM handover via the generation of a set of signaling messages which instruct the subscriber unit and receiving GSM infrastructure equipment to prepare for the switching of the radio interface layer.
    Type: Grant
    Filed: February 23, 1996
    Date of Patent: November 2, 1999
    Assignee: QUALCOMM Inc.
    Inventor: Daniel H. Agre
  • Patent number: 5974041
    Abstract: An amplifier circuit for providing an amplified signal in response to an input signal. The amplifier circuit includes an input network for applying the input signal to a selected at least one of a plurality of amplifier stages. An output network is provided for coupling the amplified signal from the selected at least one amplifier stage. The appropriate amplifier stage is selected by a control circuit in response to a desired power value of the amplified signal. By selectively activating only the amplifier stage(s) that are necessary to provide the desired level of output power, increased DC efficiency can be accomplished in applications that require an amplifier which operates linearly over a wide dynamic range.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: October 26, 1999
    Assignee: Qualcomm Incorporated
    Inventors: Richard K. Kornfeld, Charles E. Wheatley, III, Richard J. Camarillo, Katherine W. White
  • Patent number: 5974356
    Abstract: A system and method for determining a route of travel and associated mileage of a vehicle is disclosed. The system records a vehicle's identification number, location, and odometer mileage transmitted via satellite to a fixed station. The location data is provided to a processor which determines an estimated route of travel by said vehicle using a routing program. The estimated route is comprised of a plurality of position segments, each position segment having a corresponding mileage and average expected speed. The route of travel may be checked for accuracy by comparing the estimated route mileage to the odometer mileage. If a significant difference is found, a diagnostic procedure is performed which attempts to correct the mismatch by evaluating alternate routes of travel. If the alternative route mileage agrees with the actual odometer miles within a predetermined threshold, the new route and associated mileage is used as the "true" route taken by the vehicle.
    Type: Grant
    Filed: October 15, 1997
    Date of Patent: October 26, 1999
    Assignee: Qualcomm Incorporated
    Inventors: Thomas F. Doyle, Mark Bauckman, Dennis Harlow
  • Patent number: 5970413
    Abstract: A method for determining the position of a mobile station within a cellular telephone system having a plurality of cells. Voice information signals are transmitted between a first base station transmitter and a mobile station on a transmission channel. Thereafter, transmissions from the first base station transmitter of voice information signals on the transmission channel are ceased for a predetermined period of time. During the predetermined period of time when transmissions of voice information signals from the first base station transmitter have ceased on the transmission channel, the mobile station makes positional measurements. The position of the mobile station is determined in accordance with the positional measurements.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: October 19, 1999
    Assignee: Qualcomm Incorporated
    Inventor: Klein S. Gilhousen
  • Patent number: 5966652
    Abstract: A system uses conventional text messaging capabilities of cellular telephone systems to embed one or more call-back telephone numbers. A start delimiter is used to separate a text data portion corresponding to the call-back telephone number from the text message. A termination delimiter may be used to indicate the end of the text data portion corresponding to the call-back telephone number. Multiple text data portions, corresponding to multiple call-back telephone numbers, may be inserted using multiple start delimiters and termination delimiters. A text parser in the cellular telephone searches the text message for the start delimiter and extracts the text data portion corresponding to the call-back telephone number. The cellular telephone user selects a desired call-back telephone number, which may be placed in a dialing queue for simplified communications between the cellular telephone and a destination corresponding to the selected call-back telephone number.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: October 12, 1999
    Assignee: QUALCOMM Incorporated
    Inventors: Michael T. Coad, Jason B. Kenagy
  • Patent number: 5963867
    Abstract: A method and apparatus for providing network planning information in an interactive manner is described. A user selects a planning tool and inputs a selection point. If a line of sight cursor tool has been selected, a set of points on a display are set indicating a line of sight exists from those points to the selected point. If a path loss cursor tool has been selected a set of points on a display are set indicating a path loss to the selection point less than a certain threshold. Alternatively, a set of point on the display are set to various colors or shades indicating a range of path loss amounts to the selected point. In the preferred embodiment the invention incorporates the use of a computer system.
    Type: Grant
    Filed: August 16, 1995
    Date of Patent: October 5, 1999
    Assignee: Qualcomm Inc.
    Inventors: Matthew C. Reynolds, Sheila M. Reynolds
  • Patent number: 5960361
    Abstract: A base station of the cellular telephone forward link power control system transmits frames initially at a high default transmit power level, then decreases the power level incrementally until either a frame erasure is detected, triggering an immediate sharp increase in transmission power, or until a predetermined period of time has elapsed, after which the base station performs a fast downward move in the transmit power level. The fast downward move constitutes a sharp reduction in the transmit power level. In one example, the fast downward move is performed if one hundred consecutive frames are successfully transmitted without a frame erasure. By providing the fast downward move in transmit power, the power transmitted is decreased on the average. In particular, the fast downward move allows the amount of transmit power to be reduced significantly in circumstances where slow incremental decreases in power would result in excess power being employed. Method and apparatus embodiments are disclosed.
    Type: Grant
    Filed: October 22, 1996
    Date of Patent: September 28, 1999
    Assignee: Qualcomm Incorporated
    Inventor: Tao Chen
  • Patent number: 5959583
    Abstract: A novel and improved antenna adapter for interfacing a portable radiotelephone 200 with test equipment is disclosed. In a preferred embodiment, the adapter assembly comprises an RF connector 104 at one end of an elongated conductor 102 which connects directly to the radiotelephone's 200 antenna port, replacing the normal antenna assembly. The elongated conductor 102 makes electrical contact with an external ground 204 of the battery charging ports at the bottom of the radiotelephone 200 at another end. The RF connector 104 may be impedance-matched to minimize RF signal attenuation when connected to the RF test equipment. In an exemplary embodiment, the RF connector 104 comprises a 50.OMEGA. impedance-matched SMA connector.
    Type: Grant
    Filed: June 11, 1997
    Date of Patent: September 28, 1999
    Assignee: Qualcomm Incorporated
    Inventor: Thomas J. Funk
  • Patent number: 5960362
    Abstract: A method and apparatus to provide access to a dispatch system is disclosed. A communications manager (40) grants an exclusive system talker privilege to one remote unit (10) in the system at a time. After a remote unit (10) requests and is designated as the exclusive system talker, no other remote unit (20, 22) may transmit for a first pre-determined amount of time. After the first pre-determined time has elapsed, any other remote unit (20, 22) may request the exclusive system talker privilege and become the exclusive system talker. The exclusive system talker privilege is revoked by the communications manager (40) to any remote unit who retains the exclusive system talker privilege for more than a second pre-determined amount of time. The exclusive system talker privilege is also revoked upon the release of a push-to-talk button on a remote unit (10).
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: September 28, 1999
    Assignee: Qualcomm Incorporated
    Inventors: Matthew S. Grob, Yu-Dong Yao, Eric J. Lekven
  • Patent number: 5956651
    Abstract: The cellular telephone interface system has the capability to automatically choose between AMPS and CDMA cellular transmission protocols for data transmissions. The cellular telephone interface system includes a PC-modem card, such as a PCMCIA card, for interconnecting the cellular telephone to a data source, such as a laptop computer, portable facsimile machine, or the like. The cellular telephone is capable of transmission in accordance with either AMPS or CDMA transmission protocols. For AMPS, the PC-modem card converts data signals received from the data source into PCM signals for forwarding to the cellular telephone. The cellular telephone converts the PCM signals into AMPS formatted signals for transmission to a local cellular base station. For CDMA transmission, the PC-modem card converts the data signals received from the data source into RS-232E signals for transmission to the cellular telephone.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: September 21, 1999
    Assignee: Qualcomm Incorporated
    Inventors: James J. Willkie, Marc S. Phillips, David B. Doan
  • Patent number: 5956683
    Abstract: A voice recognition system having a feature extraction apparatus is located in a remote station. The feature extraction apparatus extracts features from an input speech frame and then provides the extracted features to a central processing station. In the central processing station, the features are provided to a word decoder which determines the syntax of the input speech frame.
    Type: Grant
    Filed: April 4, 1996
    Date of Patent: September 21, 1999
    Assignee: QUALCOMM Incorporated
    Inventors: Paul E. Jacobs, Chienchung Chang
  • Patent number: 5956673
    Abstract: A first remote vocoder receives analog voice and produces packetized vocoder data which is transmitted over a wireless link. A first local vocoder receives the packetized vocoder data from the wireless link. The first local vocoder converts the packetized data to a multibit PCM output. The first local vocoder also adds a detection code to one of the least significant bits (LSB) of the PCM output. The first local vocoder passes the PCM signal to the PSTN from the second end user. The first local vocoder also receives PCM input over the PSTN. The first local vocoder constantly monitors the least significant bit of the PCM input for a detection code indicating that a second local vocoder is connected at the receiving end. If the first local vocoder detects the detection code from the second local vocoder, it begins to substitute packetized data and a redundancy check for a second one of the LSB's of the outgoing PCM. The first local vocoder also begins to monitor the second one of the LSB's of the incoming PCM.
    Type: Grant
    Filed: January 25, 1995
    Date of Patent: September 21, 1999
    Inventors: Lindsay A. Weaver, Jr., S. Katherine Lam, William Gardner, Paul Jacobs
  • Patent number: 5953674
    Abstract: A portable communications device and accessory system which provides full-duplex asynchronous communications between a portable communication device and external accessories over a synchronous digital interface. The system includes a digital signal processor for generating a first synchronous digital voice signal, a UART for generating a first asynchronous data signal, and a microprocessor for generating a synchronous control command signal. The system further includes a first multiplexer for multiplexing the first synchronous digital voice signal and the first asynchronous data signal and the synchronous control command signal onto an interface line. The interface line couples the communication device to the at least one external accessory.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: September 14, 1999
    Assignee: Qualcomm Incorporated
    Inventor: James A. Hutchison, IV
  • Patent number: 5953648
    Abstract: In a mobile telephone that includes an internal voltage controlled crystal oscillator clock, a clock error compensation system is provided that dynamically determines and compensates for clock error during periods in which the mobile telephone is asleep. The system drives the control voltage of the clock to one of the clock's voltage limits, at which limit the sleep error of the clock can be expected to occur. This expected sleep error is then added to the number of clocking pulses which, in the absence of any clock error, would correspond to the length of the desired sleep period, to generate a corrected internal time. At the end of the sleep period as determined by the corrected internal time, the mobile telephone reacquires a system timing signal that represents actual system time, and the corrected internal time is then compared to the system time.
    Type: Grant
    Filed: August 13, 1996
    Date of Patent: September 14, 1999
    Assignee: Qualcomm Incorporated
    Inventors: James A. Hutchison, IV, Robbin D. Hughes
  • Patent number: D413857
    Type: Grant
    Filed: April 29, 1998
    Date of Patent: September 14, 1999
    Assignee: Qualcomm Incorporated
    Inventors: Paul Peterzell, Ty R. Aberle, James D. Brownlie, David J. Buckley, Marland Chow, David J. Ross, Paul E. Bradley, John W. Lai, John Lake, Linda P. Mai, Rodney H. Monson