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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Abstract: Each transmitter is assigned a time-only pilot code, a frequency-only pilot code, or a time-frequency pilot code to use for pilot transmission. The pilot codes may be pseudo-random, orthogonal, and/or cyclic-shift codes. To obtain a channel estimate for a transmitter using a time-frequency pilot code composed of a time-only code and a frequency-only code, a receiver multiplies a set of received symbols for each symbol period with a set of code values for the frequency-only code to obtain a set of detected symbols and performs an IDFT on the set of detected symbols to obtain an initial impulse response estimate. The receiver performs code matching on multiple initial impulse response estimates derived for multiple symbol periods with the time-only code to obtain a final impulse response estimate for the desired transmitter. The receiver retains the first L channel taps and zeroes out remaining channel taps, where L is the expected channel length.

Abstract: A power amplifier develops a modulated high power signal by summing the outputs of multiple voltage controlled oscillators. A phase control circuit synchronizes the phase relationship of multiple voltage controlled oscillators. The voltage control oscillators provide amplitude modulation of an output signal of the voltage controlled oscillator by adjusting transconductance of amplification devices of the voltage controlled oscillator. Another embodiment of the power amplifier provides buffer circuits at the outputs of the voltage controlled oscillators. The gain or delay of the buffer circuits is varied to provide amplitude modulation of the power amplifier.

Abstract: An improved system for an interactive voice recognition system (400) includes a voice prompt generator (401) for generating voice prompt in a first frequency band (501). A speech detector (406) detects presence of speech energy in a second frequency band (502). The first and second frequency bands (501, 502) are essentially conjugate frequency bands. A voice data generator (412) generates voice data based on an output of the voice prompt generator (401) and audible speech of a voice response generator (402). A control signal (422) controls the voice prompt generator (401) based on whether the speech detector (406) detects presence of speech energy in the second frequency band (502). A back end (405) of the interactive voice recognition system (400) is configured to operate on an extracted front end voice feature based on whether the speech detector (406) detects presence of speech energy in the second frequency band (502).

Abstract: Techniques for “strapping” a primary conductor with a secondary conductor in an integrated circuit (IC). The IC includes a number of circuit elements interconnected by a secondary conductor through a number of vias disposed at a number of locations for coupling the circuit elements as an alternative to a primary conductor. The primary conductor is typically formed with a low loss metal (e.g., copper or copper alloy), and the secondary conductor is typically formed with a lossy metal (e.g., aluminum or aluminum alloy) relative to the low loss metal. The secondary conductor is strapped to the primary conductor by the vias, which may be disposed only at both ends or along the entire length of the secondary conductor. The secondary conductor is formed using design guidelines such that it provides the required electrical connectivity when the primary conductor is not present but minimally interferes with the RF performance of the primary conductor.

Abstract: A buffer structure for storing symbols received via a number of (e.g., physical or transport) channels. Each channel is associated with a particular time interval (e.g., a radio frame period or a transmission time interval (TTI)) over which the received symbols are processed (e.g., interleaved). The buffer structure includes a buffer and an address generator. The buffer is partitioned into a number of sections. One section is assigned to each channel being processed. Each section can be operated as a circular buffer. The address generator provides addresses for writing symbols to the assigned sections. If the buffer structure is used for the transport channels, the sections can be assigned to the transport channels based on the associated TTIs (e.g., in descending order of TTIs). For each coded composite transport channel (CCTrCH), the transport channels in the CCTrCH can be assigned to sections defined starting from a respective initial location (e.g.

Abstract: A speech signal is decoded by a vocoder and the reconstructed speech samples are provided to a decoded frame check unit. The decoded frame check unit examines the energy of the reconstructed speech and compares the energy of the reconstructed speech to a range of acceptable energy values. If the energy is not within the range of energy values, a frame erasure is declared and the decoded frame is prevented from being to the speaker in the telephone. In the exemplary implementation, the speech is reconstructed by a vocoder which includes a postfilter which in turn includes automatic gain control. The automatic gain control element of a post filter includes a means for measuring the energy of the decoded speech data. This measured energy is used by the decoded frame check unit to decide whether to provide the decoded data to the user or to declare a frame erasure. This implementation reduces the amount of additional hardware necessary to implement the present invention.

Abstract: A direct downconversion receiver architecture having a DC loop to remove DC offset from the signal components, a digital variable gain amplifier (DVGA) to provide a range of gains, an automatic gain control (AGC) loop to provide gain control for the DVGA and RF/analog circuitry, and a serial bus interface (SBI) unit to provide controls for the RF/analog circuitry via a serial bus. The DVGA may be advantageously designed and located as described herein. The operating mode of the VGA loop may be selected based on the operating mode of the DC loop, since these two loops interact with one another. The duration of time the DC loop is operated in an acquisition mode may be selected to be inversely proportional to the DC loop bandwidth in the acquisition mode. The controls for some or all of the RF/analog circuitry may be provided via the serial bus.

Abstract: An applet requiring a virtual machine is downloaded to a wireless device. A software platform on the device determines that a virtual machine is used by the applet during execution. Without additional user interaction, the virtual machine is downloaded to the wireless device. This allows those applets requiring a virtual machine to be used with devices that don't have the virtual machine already installed. Further embodiments include the dynamic loading of a system service when an application is being loaded that uses the system service. A unique identifier associated with the system service may be used to determine if determine if the system service is loaded.

Abstract: A system and method for automatically detecting a peripheral device in communication with a wireless device, such as a wireless telephone, and requesting a driver for the peripheral from a remote server via a wireless communications network. After the driver is received and installed, the wireless device checks automatically for availability of a new version of the driver from the remote server. If there is a new version, the new driver will be downloaded to the wireless handheld device.