Patents Assigned to Qualcomm Inc.
  • Patent number: 9705653
    Abstract: A wireless communication network distributes resources for a Physical Downlink Control CHannel (PDCCH) over multiple carriers in accordance with a constraint that limits a number of blind decoding actions required by user equipment (UE). Distribution can entail segregating UE-specific and common search spaces to different monitored carriers. Distribution can entail segregating aggregation levels to different monitored carriers. Distribution can entail segregating a number of decoding candidates for a given aggregation level to different monitored carriers. The distribution can be orthogonal or non-orthogonal, and can be UE-based or per cell-based. The distribution can be static, semi-static or hop with time.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: July 11, 2017
    Assignee: QUALCOMM Inc.
    Inventors: Wanshi Chen, Jelena M. Damnjanovic, Juan Montojo, Sai Yiu Duncan Ho
  • Patent number: 9678329
    Abstract: This disclosure provides systems, methods and apparatus for provided masked structures on an embossed substrate. In one aspect, these masked structures may be reflected facets for use as part of a frontlight film. In another aspect, these masked structures may be masked wiring for use as part of a capacitive touchscreen array. In one aspect, the structures may have a discrete mask formed thereon, while in other aspects, these structures may have self-masking attributes, and may include an interferometric black mask.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: June 13, 2017
    Assignee: QUALCOMM Inc.
    Inventors: Robert L Holman, Kristopher A Lavery, Ming-Hau Tung
  • Patent number: 9673782
    Abstract: Certain aspects of the present disclosure provide methods and apparatus for calibrating a tunable active filter. One example apparatus is a filter circuit that generally includes a tunable active filter comprising at least one amplifier and a first feedback path coupled between an input and an output of the at least one amplifier, the first feedback path comprising at least one switch; and an amplitude limiter coupled to the tunable active filter and comprising at least one transistor disposed in a second feedback path coupled between the input and the output of the at least one amplifier.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: June 6, 2017
    Assignee: QUALCOMM Inc.
    Inventors: Shuja Andrabi, Rahul Karmaker
  • Patent number: 9673952
    Abstract: Techniques for supporting communication for different user equipments (UEs) on different system bandwidths are described. In one design, a base station transmits first control information to support communication for at least one first UE on a first system bandwidth and transmits second control information to support communication for at least one second UE on a second system bandwidth, which overlaps the first system bandwidth. The base station transmits data to the first and second UEs on the first and second system bandwidths, respectively. In one design, the base station receives third control information from the first UE(s) and fourth control information from the second UE(s) on a third system bandwidth. The base station receives data from the first UE(s) on the third system bandwidth and receives data from the second UE(s) on a fourth system bandwidth, which overlaps the third system bandwidth.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: June 6, 2017
    Assignee: QUALCOMM Inc.
    Inventors: Wanshi Chen, Peter Gaal, Juan Montojo, Ravi Palanki
  • Patent number: 9668204
    Abstract: The disclosure relates to a collaborative demand-based dual-mode Wi-Fi network control framework that may optimize wireless power and performance on wireless devices that may support multiple Wi-Fi networking technologies. In particular, a high performance Wi-Fi link may be reserved to services or applications that have substantial quality of service (QoS) requirements and conventional Wi-Fi links may be utilized to transfer data for services or applications that have typical performance requirements. For example, bandwidth requirements associated with forward traffic may be measured according to sizes and latency requirements associated with the forward traffic and the appropriate Wi-Fi networking mode may be controlled according to the forward traffic bandwidth requirements in combination with the average bandwidth and average retransmission rate associated with the conventional Wi-Fi links, among other factors.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: May 30, 2017
    Assignee: QUALCOMM Inc.
    Inventors: Khosro Mohammad Rabii, Vijay Naicker Subramaniam, Shivakumar Balasubramanyam, Fawad Shaukat
  • Patent number: 9664496
    Abstract: A method of determining the length of a cable coupled to a transceiver of a network device includes transmitting a first series of pulses of a first pulse width onto a cable, receiving reflections of the first series of pulses, transmitting a second series of pulses of a second pulse width onto the cable, and receiving reflections of the second series of pulses. The second pulse width is wider than the first pulse width. It is determined whether the reflections of the first series of pulses satisfy a criterion. The length of the cable is calculated using either the reflections of the first series of pulses or the reflections of the second series of pulses, based at least in part on whether the reflections of the first series of pulses satisfy the criterion.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: May 30, 2017
    Assignee: QUALCOMM Inc.
    Inventors: Yanyan Zhang, Xiabing Liu
  • Patent number: 9668265
    Abstract: Techniques for mitigating interference in a wireless communication network are described. A terminal may desire to communicate with a weaker serving base station and may observe high interference from a strong interfering base station. The two base stations may be asynchronous and have different frame timing. In an aspect, high interference may be mitigated by having the interfering base station reserve downlink and/or uplink resources. The interfering base station may transmit at a low power level or not at all on the reserved downlink resources to reduce interference to the terminal. Terminals served by the interfering base station may transmit at a low power level or not at all on the reserved uplink resources to reduce interference at the serving base station. The terminal may then be able to communicate with the serving base station.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: May 30, 2017
    Assignee: QUALCOMM Inc.
    Inventors: Ravi Palanki, Aamod D. Khandekar, Avneesh Agrawal
  • Patent number: 9628309
    Abstract: A method performed by a wireless device includes receiving a first signal that contains one or more modulated symbols and determining a signal strength of the first signal. The method also includes adjusting a remembrance factor based on the signal strength of the first signal and demodulating the one or more modulated symbols based on the first signal and based on a number of previously demodulated symbols. The number of previously demodulated symbols utilized in the demodulation is based on the remembrance factor.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: April 18, 2017
    Assignee: QUALCOMM Inc.
    Inventors: Le Nguyen Luong, Yoshiro Fukuoka
  • Patent number: 9312835
    Abstract: A power control device can generate control signals to control operation of power sources. Additional control signals control operation of load switches that can be connected to the power sources to provide secondary sources of power. The load switches can be turned in a gradual manner at rates that depend on the power sources to which they are connected. The outputs of the load switches can be monitored for overvoltage and undervoltage conditions relative to the power sources to which they are connected.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: April 12, 2016
    Assignee: QUALCOMM, Inc
    Inventors: Crown Sen Shieh, Abid Hussain, Thomas J O'Brien
  • Patent number: 9252661
    Abstract: Exemplary embodiments are directed to a power controller. A method may include comparing a summation voltage comprising a sum of an amplified error voltage and a reference voltage with an estimated voltage to generate a comparator output signal. The method may also include generating a gate drive signal from the comparator output signal and filtering a signal coupled to a power stage to generate the estimated voltage.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: February 2, 2016
    Assignee: QUALCOMM Inc.
    Inventors: Zeljko Grbo, Aleksandar Prodic, Francesco Carobolante
  • Patent number: 9160376
    Abstract: The present disclosure includes programmable stabilization circuits and methods. In one embodiment, a power amplifier in a wireless transmitter includes a transistor comprising a gate, a source, and a drain. Feedback from the drain to the gate is modified dynamically to stabilize the amplifier under changing operating conditions. In one embodiment, a series RC circuit is configured between the drain the gate and the RC circuit value is adjusted based on different power supply voltage modes.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: October 13, 2015
    Assignee: QUALCOMM, Inc.
    Inventor: Antonino Scuderi
  • Patent number: 9124231
    Abstract: Techniques for reducing ringing arising from L-C coupling in a boost converter circuit during a transition from a boost ON state to a boost OFF state. In an aspect, during an OFF state of the boost converter circuit, the size of the high-side switch coupling a boost inductor to the load is gradually increased over time. In this manner, the on-resistance of the high-side switch is decreased from a first value to a second (lower) value over time, which advantageously reduces ringing (due to high quality factor or Q) when initially entering the OFF state, while maintaining low conduction losses during the remainder of the OFF state. Further techniques are provided for implementing the high-side switch as a plurality of parallel-coupled transistors.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: September 1, 2015
    Assignee: QUALCOMM, Inc.
    Inventors: Song S Shi, Pengfei Li, Lennart Karl-Axel Mathe
  • Patent number: 9052886
    Abstract: Circuitry in an adapter, such as a power supply, can provide power at a desired voltage level to a portable device. The circuitry may assert one of several electrical configurations on the cabling that electrically connects the portable device to the external device to indicate to the external device a desired voltage level.
    Type: Grant
    Filed: April 14, 2014
    Date of Patent: June 9, 2015
    Assignee: QUALCOMM, Inc.
    Inventors: Shadi Hawawini, Georgios Konstantinos Paparrizos
  • Publication number: 20130328634
    Abstract: A method in a mobile communication device includes: measuring a first temperature associated with a crystal configured to provide a reference signal having a frequency; measuring a second temperature associated with a component that is coupled to the crystal by an electrically and thermally conductive line; and compensating, based upon the measuring of the first and second temperatures, for a change in the frequency of the reference signal of the crystal.
    Type: Application
    Filed: June 28, 2012
    Publication date: December 12, 2013
    Applicant: QUALCOMM INC.
    Inventors: Daniel Fred Filipovic, Vishal Agarwal
  • Patent number: 8259565
    Abstract: This disclosure is directed to techniques for video call setup in a mobile video telephony network. In general, the call setup techniques reduce call setup delays by preemptively retransmitting NSRP packets before expiration of the timeout period ordinarily required for receipt of an NSRP ACK packet from the remote terminal. The retransmitted NSRP packets may be retransmitted during idle periods in which the modem layer in the sending mobile terminal has received no other data for transmission of the remote mobile terminal, thereby taking advantage of idle bandwidth. Multiplex data received by the modem can be locally buffered at the modem layer for retransmission. In this manner, retransmission does not require regeneration of the original call setup messages nor multiplexing. Instead, the previously generated and multiplexed data is buffered at the modem layer for retransmission to reduce processing overhead within the mobile terminal.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: September 4, 2012
    Assignee: QUALCOMM Inc.
    Inventors: Tao Yang, Nischal Abrol
  • Patent number: 8023489
    Abstract: Systems and methods for burden sharing in satellite based communication systems are disclosed. One or more users in a satellite based communication system may experience signal degradation or signal fading that can occur for an extended period of time, such as when the fade is due to rain fade. The system can improve a communication link with a particular user by varying the data rate. The data rate can be varied by reducing a coding rate to compensate for low signal quality. In a time multiplexed communication system where multiple users time multiplex the available communication bandwidth, the system can concurrently adjust a time allocated to a user based in part on the coding rate. The time allocated to a user can be increased for decreased coding rates in order to maintain a substantially stable symbol rate to the user for each time multiplex cycle of users.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: September 20, 2011
    Assignee: Qualcomm, Inc.
    Inventor: Leonard Norman Schiff
  • Patent number: 8014749
    Abstract: A method and apparatus for transmitting Preferred Control Channel Cycle Attributes in a wireless communication system comprising generating a 8 bit Length field, a 8 bit AttributeID field, a 1 bit PreferredControlChannelCycleEnabled field, a 0 or 15 bits PreferredControlChannelCycle field, a 1 bit PreferredQuickPageEnabled field, a 0 or 15 bits PreferredRQuickPage field, a 1 bit PreferredPagingCarrierEnabled field, a 7 bits PreferredPagingCarrier field and a 0 or 7 bits Reserved field, wherein the Length field indicates the length of the complex attribute in octets and the length of the Reserved field is such that the attribute value is octet aligned; and transmitting the Preferred control channel cycle attribute over an OFDM communication link.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: September 6, 2011
    Assignee: Qualcomm, Inc.
    Inventor: Rajat Prakash
  • Patent number: 7991094
    Abstract: A method for transmitting a timing correction message in a wireless communication system, the method comprising, Generating the timing correction message comprising a 8-bit MessageID field and a 2-bit NumSectors field wherein, the NumSectors field indicates the number of sector records in the message and a 16 bit TimingCorrection field wherein, the TimingCorrection indicates the timing correction on the sector and last 15 bits indicate the magnitude of timing correction in units of ? chips and transmitting the timing correction message over a communication link.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: August 2, 2011
    Assignee: Qualcomm, Inc.
    Inventors: Ravi Palanki, Aamod Khandekar
  • Patent number: 7881739
    Abstract: A method and apparatus for adaptively controlling the power level of transmissions from a remote station by determining the velocity of the remote station. A general classification of the velocity of the remote station can be used to selectively implement a closed loop power control scheme. Power level parameters are used to determine velocity. In accordance with a classification of stationary, low speed, or high speed, the closed loop power control is selectively operated. Velocity can be determined by either the base station or the remote station through various methods. One method is the use of power control bits and/or average power to determine level crossings and excursion times.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: February 1, 2011
    Assignee: Qualcomm, Inc.
    Inventors: Sandip Sarkar, Yu-Cheun Jou
  • Publication number: 20110009066
    Abstract: A method and apparatus for providing uplink signal-to-noise ratio (SNR) estimation in a wireless communication system. A first signal is received over a first channel and a second signal is received over a second channel, where the second signal is received at a higher signal power level than said first signal. A signal-to-noise ratio (SNR) of the second signal is measured, and the SNR of the first signal is determined based at least in part upon the measured SNR of the second signal.
    Type: Application
    Filed: September 17, 2010
    Publication date: January 13, 2011
    Applicant: QUALCOMM, INC.
    Inventor: Durga P. Malladi