Abstract: Methods and apparatus for improved electrical, mechanical and thermal performance of stacked IC packages are described. An IC package comprises a substrate, a first die, a second die, and an interposer with an opening in a first surface of the interposer configured to accommodate the first die. The first IC die is attached a first surface of the substrate. The interposer is mounted on the first surface of the substrate such that the first IC die is placed within the opening in the interposer. The second die is mounted on a second surface of the interposer. Wire bonds couple bond pads on the first surfaces of IC die are coupled to the first surface of the substrate. A mold compound encapsulates the first IC die, the second IC die, the interposer and the wire bonds.

Abstract: Aggregated fragment acknowledgement in a LAN. A transmitter sends a data packet to a receiver. The receiver then constructs an AFAF and sends that AFAF back to a transmitter. The transmitter is then able to determine the success and/or failure, in full or in part, of the transmission of the data packet to the receiver. A very precise granularity, or resolution, of the success of the transmission may be achieved on a per fragment basis. Bandwidth savings may also be achieved. When no resolution on a fragment basis is required, then that level of resolution is not employed. The resolution of the fragment basis may be adaptively employed when required to notify the transmitter of the status of one or more fragments within a data packet.

Abstract: A packet voice transceiver adapted to reside at a first end of a communication network and to send an ingress communication signal comprising voice packets to, and receive an egress communication signal comprising voice packets from, a second packet voice transceiver residing at a second end of the communication network. The packet voice transceiver includes a far-end echo canceller that reduces echo that is present in the egress communication signal. The far-end communicates with other functional components of the transceiver system and cancels echo or refrains from canceling echo based on the activity of the other functional components.

Abstract: A system of switches having a memory/command bus having a first interface, a second interface and a third interface. A memory is connected to the third interface of the memory/command bus. The memory has a first memory address. A first switch monitors the memory/command bus and interprets information written to the first memory address as proxy information. The first switch is connected to the first interface of the memory/command bus. The second switch monitors the memory/command bus and interprets information written to the first memory address as proxy information. The second switch is connected to the second interface of the memory/command bus.

Abstract: A radio frequency (RF) integrated circuit (IC) includes a local oscillation module, analog radio receiver, analog radio transmitter, digital receiver module, digital transmitter module, and digital optimization module. The local oscillation module is operably coupled to produce at least one local oscillation. The analog radio receiver is operably coupled to directly convert inbound RF signals into inbound low intermediate frequency signals based on the local oscillation. The digital receiver module is operably coupled to process the inbound low IF signals in accordance with one of a plurality of radio transceiving standards to produce inbound data. The digital transmitter is operably coupled to produce an outbound low intermediate frequency signal by processing outbound data in accordance with the one of the plurality of radio transceiving standards. The analog radio transmitter is operably coupled to directly convert the outbound low IF signals into outbound RF signals based on the local oscillation.

Abstract: Quasi error free method and system are presented for encoding and decoding information using turbo codes as an inner code in conjunction with an algebraic outer code linked by an interleaver. This combination of outer algebraic code and turbo inner code linked by an interleaver, which has a guaranteed minimum Depth between symbols output from the interleaver, can produce a quasi error free performance in systems utilizing Turbo-Codes without an increase in bandwidth.

Abstract: A method of presenting a selected portion of graphical images within a wireless terminal that includes receiving an original graphical image, having a source resolution, to be presented on a display screen. The native pixel resolution of the display screen may differ from that of the original graphical image. A complex decimation pattern when applied to the selected portion of the image allows the selected portion of the original graphical image to be resized from the source resolution to a decimated resolution operable to be displayed within the native resolution of the display screen. Decimated pixels need not be further processed to reduce the processing requirements imposed on the system processor. Operations normally associated with the decimated portions of the image may be offloaded from the processing module to improve system efficiency.

Abstract: A method for an antenna architecture may comprise receiving at a first radio frequency integrated circuit (RFIC) integrated within a mobile terminal, first signals via at least a first antenna, where the first signals may comprise signals within a 2100 MHz band. Second signals may be received at a second RFIC integrated within the mobile terminal via at least one of the first antenna and at least one other antenna, where the second signals may comprise signals within at least one of an 1800 MHz band and a 900 MHz band. Third signals may be received at at least a third RFIC integrated within the mobile terminal via at least one of the first antenna and at least one other antenna, where the third signals may comprise VHF/UHF broadcast signals within at least one of a DVB broadcast band, an ATSC broadcast band and an ISDB broadcast band.

Abstract: An RF mixer includes a plurality of submixers coupled to a single input transistor pair and a single tail current source. An input LO signal is divided into multiple individual waveforms, each having a different phase. The phase differences are even in that the phase difference between any two time-adjacent individual waveforms is approximately equal to the phase difference between any other two time-adjacent individual waveforms. The submixers are appropriately scaled so that the individual waveforms, when summed, create a piecewise linear LO signal. The submixers also combine the individual waveforms with an input baseband signal to produce an output signal or to produce a baseband signal from an input mixed signal. In order to reduce noise in the system, only one submixer is active at any time. Further, polarities of some individual waveforms are reversed so that to avoid signal cancellation when by combining waveforms of opposite polarities.

Abstract: A hand held radio host includes circuitry for selectively providing power to radiating transceiver elements and non-radiating application elements according to a plurality of power modes of operation to achieve desired effects and in a way that saves power and extends battery life. In one embodiment of the invention, the hand held host operates in one of three modes. In a full power mode, any selected application element as well as all transceiver elements are powered on at the same time. Thus, for example, a cell phone module, a wireless personal access network module, a wireless local area network module and one of a pager/short message service message module may all be powered on at the same time to receive corresponding messages, calls, data sessions, etc. At the same time that all of the transceiver elements are powered on, any selected application element receives power.

Abstract: A communications transceiver includes a baseband processor, a receiver section, and a transmitter section that includes a power amplifier. The receiver and transmitter sections communicatively couple to the baseband processor. In a calibration operation, the baseband processor produces a test signal to the transmitter section. Further, the baseband processor causes each of a plurality of power amplifier bias settings to be applied to the power amplifier. For each of the plurality of power amplifier bias settings, the power amplifier produces an amplified test signal, the receiver section couples back a portion of the amplified test signal to the baseband processor, and the baseband processor produces a characterization of the amplified test signal respective. Based upon a plurality of characterizations of the amplified test signal and respective power amplifier bias settings, the baseband processor determines power amplifier bias control settings.

Abstract: A quantizer is described for use in a flash analog to digital converter (ADC), which may be implemented as part of an integrated wireless transceiver or other highly integrated electrical circuit. The quantizer may be configured to operate within such a flash ADC in an accurate manner within a desired voltage range, while minimizing factors that may otherwise lead to errors in the analog-to-digital conversion process. For example, a comparator of the quantizer may be used that has properties that are particularly well-suited for such an environment, where such properties may include, for example, a relatively low input referred offset voltage that is associated with a preamplifier of the comparator.

Abstract: A method for parallel concatenated (Turbo) encoding and decoding. Turbo encoders receive a sequence of input data tuples and encode them. The input sequence may correspond to a sequence of an original data source, or to an already coded data sequence such as provided by a Reed-Soloman encoder. A turbo encoder generally comprises two or more encoders separated by one or more interleavers. The input data tuples may be interleaved using a modulo scheme in which the interleaving is according to some method (such as block or random interleaving) with the added stipulation that the input tuples may be interleaved only to interleaved positions having the same modulo-N (where N is an integer) as they have in the input data sequence. If all the input tuples are encoded by all encoders then output tuples can be chosen sequentially from the encoders and no tuples will be missed.

Abstract: A system and method for the aggregation of multimedia information storage via a broadband access gateway is disclosed. Information about storage resources accessible to a broadband access gateway may be collected and used in selecting storage capacity used for storing multimedia information such as, for example, streaming video, broadcast video, digitized video, digitized audio, text, and digitized images. The gateway may manage storage and retrieval of the multimedia information based upon user defined criteria and characteristics of the available storage resources. Multimedia information may be parsed for storage across multiple storage resources, and the location and nature of the storage resources used for storage of multimedia information items may be unknown to the user. Storage services accessible via a broadband connection may also be used as storage resources.

Abstract: A balancing/unbalancing (balun) structure for operating at frequency f1 includes a microstrip printed circuit board (PCB). A balun on the PCB includes two input ports are coupled to a differential signal. An isolated port is connected to ground through a matched resistance. An output port is coupled to a single-ended signal corresponding to the differential signal. A plurality of traces on the PCB connect the two input ports, the load connection port and a tap point to the output port. A f2 rejection filter on the PCB is wrapped around the balun and includes a first folded element with a transmission length of ?2/4 and connected to the output port. A second folded element has a transmission length of ?2/4 and connected to the tap point. A third folded element connects the tap point to the output port and has a transmission length of ?2/4.

Abstract: In RF transceivers, a method and system for a second order input intercept point (IIP2) correction are provided. A DC offset sensor may detect DC offset voltages produced by blocker signals in “I” and “Q” signal component paths in an RF receiver. The DC offset sensor may generate control signals which may be utilized by a first and second injection circuits to generate DC offset currents that compensate for the DC offset voltages in the signal component paths. An injection circuit may utilize current drivers to generate binary weighted currents which may be added together to produce a DC offset current. The polarity of the DC offset current and the selection of which current drivers to use may be determined by the control signals. A calibration voltage may also be utilized to correct or adjust the gain in the injection circuit.

Abstract: A communications system, having a combination Reed-Solomon encoder and a Turbo-Code encoder Data frame configuration which may be changed to accommodate embedded submarkers of known value are embedded in with the data order to aid synchronization in the receiver system, by providing strings of known symbols. The string of known symbols may be the same as the symbols within a training header that appears at the beginning of a data frame. Frame parameters may be tailored to individual users and may be controlled by information pertaining to receivers, such as bit error rate, of the receiver. Additional headers may be interspersed within the data in order to assist in receiver synchronization. Frames of data may be acquired quickly by a receiver by having a string of symbols representing the phase offset between successive header symbols in the header training sequence in order to determine the carrier offset.

Abstract: The present invention is directed toward a method and apparatus for detecting collisions on a shared access network. In accordance with the present invention, two or more RF modulated signals having a plurality of different phase states are transmitted to a central controller, wherein two or more of the transmitted signals collide at the central controller. The collision detection system then determines a characteristic of the collision signal, such as the absolute value of the peak amplitude of the collision signal. The collision detection system then compares the characteristic with a plurality of thresholds and determines the number of RF modulated signals that collided as a function of the comparison. The method for detecting collisions may further include monitoring a plurality of collision events to determine a characteristic, such as the absolute value of the peak amplitude of the collision signal, of each of the collision events.

Abstract: A voice data and RF integrated circuit (IC) includes an RF transmitter that generates a transmit signal contemporaneously containing both outbound realtime data and outbound non-realtime data. The integrated circuit optionally includes an RF receiver that contemporaneously generates both outbound realtime data and outbound non-realtime data from a received signal.

Abstract: A voice, data and RF integrated circuit (IC) includes a first radio frequency (RF) receiver section coupled to receive a first inbound RF signal over a first range of frequencies and generate a first amplified RF signal, wherein the first inbound RF signal includes a desired RF signal and an undesired signal. A second RF receiver section is coupled to receive a second inbound RF signal over a second range of frequencies that is different from the first range of frequencies and generate a second amplified RF signal, wherein the second inbound RF signal includes the undesired signal. A first RF cancellation module provides the desired RF signal while attenuating the undesired signal.