Abstract: An adaptive receiver is disclosed for optimally receiving and processing signals. The receiver utilizes one or more memory blocks to store groups of incoming symbols. The groups of symbols are processed by a channel estimation subsystem to determine channel characteristics. The receiver determines the appropriate demodulation and decoding strategy to implement based on the determined channel characteristics. The receiver includes a plurality of demodulation and decoding schemes, one of which is selected based on the results of a channel estimation analysis.

Abstract: A system and method for communicating with a second communication system utilizing a plurality of antennas. Various aspects of the present invention may comprise determining whether communicating with the second communication system utilizing a plurality of antennas in a first configuration, which comprises a beam-forming configuration, is preferable to utilizing a plurality of antennas in a second configuration, which comprises a MIMO or MISO configuration. If it is determined that the first configuration is preferable to the second configuration, the communication system may be configured to communicate with the second communication system by utilizing at least a portion of the plurality of antennas in the first configuration. If it is determined that the second configuration is preferable to the first configuration, then the communication system may be configured to communicate with the second communication system by utilizing at least a portion of the plurality of antennas in the second configuration.

Abstract: A method and apparatus are disclosed for adaptively selecting a deblocking filter used in video de-blocking. Determinations are made as to whether each of a set of spatially adjacent video blocks is inter-coded or intra-coded and whether each of said adjacent video blocks is field-coded or frame-coded. A deblocking filter is selected (an interlace deblocking filter or a frame deblocking filter) based on the determinations. The selected deblocking filter is used to filter across a boundary between adjacent video blocks.

Abstract: In a normalization process, overflow occurring in limited size registers, holding the alpha or beta values in a map decoder, may be overcome by subtracting a constant value from all of the alpha or beta values when they reach a limit. Because subtracting a constant value may slow down the computation, detection of a constant value may occur on one decoding cycle and normalization on the succeeding decoding cycle. A multiplexor type circuit can be used to direct either zeros, in the normalization case, or a most significant bit(s), in computations without normalization, into the register holding the alpha or beta values. To minimize the impact on the computation by the normalization process, the multiplexor circuit can be set by the previous decoder cycle so that the computation does not have to wait for the multiplexor to be set to normalization or normal computation.

Abstract: A process of controlling a flow of data in a wireless network providing wireless access to the wireless network by wireless devices is disclosed. Data is received from a wireless device by a network device, through one access point of a plurality of access points in communication with the network device, indicating a client identifier for the wireless device. The client identifier is forwarded to an authentication server and the network device mediated authentication of the wireless device with the authentication server. Thereafter, data packets received from portions of the wireless network and from the plurality of access points are evaluated and the received data packets are passed to portions of the wireless network and to the plurality of access points, based on the evaluation of the received data packets. In addition, the network device periodically polls for a status of the wireless device from the access point.

Abstract: A system and method for authenticating a powered device attached to a power sourcing equipment for power provisioning such as power over Ethernet (PoE) enabled device communicating with a PoE enabled switch. Powered devices such as computing devices, security cameras, VoIP phones, wireless access points, or the like, can be detected by a PoE switch upon connection. Power applied to the powered device is restricted until information received from the powered device is authenticated.

Abstract: Provided is a communications interface system. The communications interface system includes one or more protocol modules configured to include interface protocols that facilitate direct communication between a switching subsystem, a physical layer subsystem, and a Power over Ethernet subsystem. The protocol modules are connectable to a communications bus, the direct communication occurring across the communications bus in accordance with the protocols.

Abstract: A system and method for collecting power management parameters in a computing device for power over Ethernet (PoE). Computing devices such as portable computers can include a collection component that is responsible for gathering power management information from various parts of the computing device. The collected power management information can then be sent to a LAN on motherboard device for use in a PoE allocation scheme.

Abstract: A method determines RW head radial position relative to tracks within a magnetic data disc. This involves sensing both a S-burst signal and a P-burst signal with the RW head. The S-burst signal and P-burst signal are associated with a two-burst servo pattern on the magnetic disc. The S-burst pattern has a phase that remains constant radially across tracks within the magnetic disc. The P-burst has a second phase that rotates radially across tracks within the magnetic disc. By determining a phase difference between a sensed S-burst signal and P-burst signal, it is possible to determine the RW head radial position relative to the tracks on the magnetic disc.

Abstract: A system and method for operating system power management in a computing device for power over Ethernet (PoE). Computing devices such as portable computers or embedded devices having an operating system (OS) can leverage power management features in an OS. Power management state information such as user parameters, computing device parameters, application parameters, IT parameters, network parameters, etc. can be used to generate power requests that are acted upon by power sourcing equipment.

Abstract: Information bit puncturing for turbo coding with parameter selectable rate matching tailored to lower Eb/No without degrading BLER (Block Error Rate) performance. A means is presented herein by which puncturing is performed to each of three bit sequences from a turbo encoder (i.e., the systematic bits or information bits within an block to be turbo encoded, the parity bits output from a first constituent encoder, and the parity bits output from a second constituent encoder). The number of bit punctured from each of the parity bits output from the first constituent encoder and the parity bits output from the second constituent encoder need not be the same number of bits. The manner in which puncturing may be performed can be adaptive and/or changeable, in that, first puncturing parameters may be employed at a first time and second puncturing parameters may be employed at a second time, etc.

Abstract: A method for communicating data includes equalizing received data to reduce channel related distortion in the received data. A clock having frequency and/or phase fixed relative to the equalized data is extracted from the equalized data. The extracted clock is used to clock a retimer to generate recovered data.

Abstract: Multi-dimensional space Gray code maps for multi-dimensional phase modulation as applied to LDPC (Low Density Parity Check) coded modulation. A novel approach is provided within LDPC coded modulation communication systems that employ multi-dimensional phase modulation, using m-D (multi-dimensional) Gray code maps, to provide for improved performance when compared to communication systems employing 1-D (single-dimensional) Gray code maps. This approach can generate all possible m-D Gray code maps for a 2m-D M PSK modulation system. For example, all of the 2-D Gray code maps may be generated for a communication system using 4-D 8 PSK modulation system (where m=2, and M=8). A variety decoding processing approaches may be employed to perform LDPC coded modulation decoding of multi-dimensional space Gray code mapped signals. The slightly increased decoding complexity (when compared to decoding 1-D Gray code mapped signals) is the computation of symbol metrics and their decomposition to bit metrics.

Abstract: A controller is disclosed that can be used in controlling a drive device of a disk drive, or other systems, in the presence of sinusoidal disturbances. The controller includes a calibration module that generates a plurality of reference states for a reference region of a disk of the disk drive. An initialization state generation module generates a plurality of initialization states for at least one other region of the disk as a function of the plurality of reference states, a displacement between the other regions of the disk and the reference region of the disk, and a reference state transition matrix. A control module generates a control signal for the drive device based on the plurality of initialization states.

Abstract: Methods and systems for fast calibration to cancel phase feedthrough are disclosed and may comprise individually activating each of n binary-weighted cells utilizing a control signal in a power amplifier driver (PAD) and measuring the output signal, or offset, in response to a null signal applied to an input of each binary-weighted cell. This offset may be fed back, summed, and adjusted until the measured PAD output may be minimized. This calibrated offset may cancel phase feedthrough of the PAD, and the calibrated offset for each binary-weighted cell may be stored in a lookup table. The control signal may also be utilized for controlling the output power of the PAD by activating appropriate binary-weighted cells. For each of the 2n output powers, a calibrated offset is calculated utilizing a weighted sum of the stored offsets for the activated binary-weighted cells.

Abstract: Distributing clock signals within an electronic device may comprise determining a status of at least one gate that controls flow of a clock signal to at least one device coupled to the gate. One or more of the gates may be controlled based on this determined status and it may be determined whether the devices coupled to the gate are active or inactive. One or more gates that control the flow of the clock signal to the device may be turned OFF if the device is inactive. The status of one or more of the gates may be read from one or more registers mapped to the gates. One or more gates that control one or more active devices may be prevented from being deactivated based on the determined status of the gates. A current hardware setting of a gate may be overridden via software control.

Abstract: A sigma delta (??) analog to digital converter (ADC) that compensates for the adverse effects associated with the time delay introduced by delay circuitry of the feedback loop. This ?? ADC includes a first summing stage, first integrator, second summing stage, second integrator, quantizer, and feedback loop. The second integrator has associated with it a feed forward pass operable to reduce negative effects of delay circuitry within the feed back loop. Feedback loop includes delay circuitry and a number of digital to analog converters. The feed forward path that reduces the effects of the delay includes a resistance within the second or additional integrator. This allows the adverse effects of the time delays associated, which may lead to circuit instability or meta-stability, to be reduced or eliminated.

Abstract: An image data decompression apparatus for decoding blocks of motion compensated non-intra coded data uses a memory (14) storing reference picture data. A decoding processor (12) decodes a current block of a generated picture using lines of previously decoded image data from the memory (14) that are selected in dependence upon a motion vector (V1) for the current block. In order to improve access efficiency to the memory (14) the decoding processor (12) concatenates fetches into bursts for different sections of lines of previously decoded data that lie within a predetermined range within the memory addresses of the memory (14).

Abstract: A system and method for applying Power over Ethernet (PoE) to portable computing devices. Portable computing devices such as portable computers have unstable power profiles due to the wide variability in tasks that are undertaken by users. This unstable power profile makes it difficult for power source equipment (PSE) in a PoE system to effectively manage powering of those devices. In one embodiment, PoE power is used to augment a reservoir of charge (e.g., battery) that has a stable power profile. The reservoir of charge provides a charge buffer such that a PSE need not match the swings in power demands by electronic circuitry in the portable computing device.

Abstract: A one-time programmable device includes a controller, a protection system, a static storage element and a latch, which can be referred to as a latch-based one-time programmable (OTP) element. In one example, the static storage element includes a thin gate-oxide that acts as a resistance element, which, depending on whether its blown, sets the latch into one of two states.