Abstract: A programmable gain attenuator (PGA) in particular to be used in a track-and-hold circuit is disclosed. The PGA is located in the feedback path around an operational amplifier. One tap switch is used to connect one PGA section to the output of the operational amplifier. The PGA section is capable of producing a multiplicity of different gain settings by using a multiplicity of secondary resistive devices in a voltage divider, wherein the resistive devices each can be independently coupled to a reference voltage.

Abstract: A system and method for removing impulsive noise from a digital signal are disclosed. The system and method determines either a neighborhood maximum and/or a neighborhood minimum for a pixel of interest. The intensity of the pixel of interest is then compared to the neighborhood maximum or the neighborhood minimum to determine whether the pixel of interest should be replaced.

Abstract: A memory system is provided comprising a memory controller, a level 1 (L1) cache including L1 tag memory and L1 data memory, a level 2 (L2) cache coupled to the L1 cache, the L2 cache including L2 tag memory having a plurality of L2 tag entries and a L2 data memory having a plurality of L2 data entries. The L2 tag entries are more than the L2 data entries. In response to receiving a tag and an associated data, if L2 tag entries having corresponding L2 data entries are unavailable and if a first tag in a first L2 tag entry with an associated first data in a first L2 data entry has a more recent or duplicate value of the first data in the L1 data memory, the memory controller moves the first tag to a second L2 tag entry that does not have a corresponding L2 data entry, vacates the first L2 tag entry and the first L2 data entry and stores the received tag in the first L2 tag entry and the received data in the first L2 data entry.

Abstract: Data packets transmitted over a wireless network are suppressed by hardware at the transmitting end and expanded on the receiving end. This conserves bandwidth as well as reduces the processing resource requirements in both the subscriber station and the base station. An extended header element is added to a data packet that is to be transmitted over the wireless network. The extended header element contains an index that is used along with an identifier to access a rule. The rule is used to determine which bytes are to be suppressed at the transmitter and expanded at the receiver.

Abstract: A method of handling data packets in a series of network switches includes receiving an incoming data packet at a data port of a first switch of the series of network switches. A module id bitmap of the incoming data packet is resolved and a bit corresponding to the first switch of the module id bitmap is examined to determine if the bit is set. A destination address of the incoming data packet is resolved when the corresponding bit is set and the incoming data packet is forwarded or dropped based on the destination address. When the corresponding bit is not set, the incoming data packet is forwarded to a next switch of the series of network switches. A network switch configured to allow for cascading of data packets is also disclosed.

Abstract: A method for generating a preamble of an Orthogonal Frequency Division Multiplexed (OFDM) data frame for a multiple input multiple output (MIMO) wireless communication includes determining at least one system condition preamble format parameter. When the system condition preamble format parameter satisfies a first preamble format parameter a preamble having a first preamble format is formed. When the system condition preamble format parameter satisfies a second preamble format parameter, a preamble having a second preamble format is formed. Further, when the system condition preamble format parameter satisfies a third preamble format parameter, a preamble having a third preamble format is formed. The first, second, and third preamble formats differ based upon their lengths, fields, and modulation formats of a high throughput signal field.

Abstract: A method and system are provided for synthesizing a corrupted frame output from a decoder including one or more predictive filters. The corrupted frame is representative of one segment of a decoded signal output from the decoder. The method comprises extrapolating a replacement frame based upon another segment of the decoded signal and substituting the replacement frame for the corrupted frame. Finally, the internal states of the filters are updated based upon the substituting.

Abstract: A communication network having at least one access point supports wireless communication among a plurality of wireless roaming devices via a first and a second wireless channel. The access point comprises a first and a second transceiver. The first and second transceivers operate on the first and second wireless channels, respectively. Each of the plurality of wireless roaming devices are capable of communicating on the first and second wireless channel. In one embodiment, the first wireless channel is used to exchange data, while the second channel is used to manage such exchanges as well as access to the first channel. In an alternate embodiment, both channels are used to support communication flow, however the first channel supports a protocol that is more deterministic than that of the second channel. Allocation of ones of the plurality of wireless roaming devices from one channel to the next may occur per direction from the access point.

Abstract: A system and method that provide dynamic reconfiguration of communication resources in a multi-transceiver configuration. Various aspects of the present invention may comprise communicating a first portion of a first communication using a plurality of transceivers. A determination may be made to reallocate at least one of the plurality of transceivers for a second communication. A second portion of the first communication may be communicated using the plurality of transceivers less the reallocated transceiver(s), and the second communication may be communicated using at least the reallocated transceiver(s). Various aspects of the present invention may also comprise communicating a first communication utilizing a first transceiver and a second communication utilizing a second transceiver. A determination may be made to utilize the first and second transceivers in a MIMO configuration to communicate next information.

Abstract: A communication network having at least one access point supports wireless communication among a plurality of wireless roaming devices via a first and a second wireless channel. The access point comprises a first and a second transceiver. The first and second transceivers operate on the first and second wireless channels, respectively. Each of the plurality of wireless roaming devices are capable of communicating on the first and second wireless channel. In one embodiment, the first wireless channel is used to exchange data, while the second channel is used to manage such exchanges as well as access to the first channel. In an alternate embodiment, both channels are used to support communication flow, however the first channel supports a protocol that is more deterministic than that of the second channel. Allocation of ones of the plurality of wireless roaming devices from one channel to the next may occur per direction from the access point.

Abstract: Systems and methods that cache are provided. In one example, a system may include a spatial cache system coupled to a processing unit and to a memory. The spatial cache system may be adapted to reduce the memory latency of the processing unit. The spatial cache system may be adapted to store prefetched blocks, each stored prefetched block including a plurality of cache lines. If a cache line requested by the processing unit resides in one of the stored prefetched blocks and does not reside in the processing unit, then the spatial cache system may be adapted to provide the processing unit with the requested cache line.

Abstract: Various example embodiments are disclosed. According to one example embodiment, an integrated circuit may include a mode block, a plurality of data blocks, and a reset node. The mode block may be configured to output a test mode signal, a scan mode signal, and a trigger signal based on a received data input. The plurality of data blocks may each include registers configured to store data, each of the plurality of data blocks being configured to write over at least some of the data stored in their respective registers in response to receiving a write-over instruction. The reset node may be configured to reset the registers based on receiving either a first reset input or a second reset input. The integrated circuit may be configured to enter a test mode, enter a scan mode, and exit the test mode.

Abstract: A self servo writing disk controller detects a plurality of spiral sync marks and a plurality of spiral bursts corresponding to one of a plurality of servo spirals from a read signal from the read/write head. A timing reference signal is generated based on timing of at least one of the plurality of the spiral sync marks. A position error signal is generated based on timing of at least one of the plurality of spiral sync marks and a magnitude of at least one of a plurality of spiral bursts. The timing reference signal and the position error signal are used by the disk drive for timing and positioning in self writing initial servo wedges to the disk.

Abstract: A system for adding a time stamp to transmission traffic on a wireless network comprises a front end processor that receives a packet from the network and generates a Start Of Frame pulse and a LENGTH field corresponding to a length of the packet. A time stamp generator generates a time stamp by sampling the system master time counter. A synchronizer receives the SOF pulse and the LENGTH field from the front end processor, and generates a control signal. A multiplexer inputs the packet from the front end processor, the control signal and the time stamp, and outputs a modified packet with a field in the packet replaced by the time stamp.

Abstract: A method and apparatus are provided for call setup in a communication network that comprises at least one mobile station to facilitate the hand-off of a wireless headset from a mobile station that has been docked to a landline base unit that includes a radio front end operable to communicate with the wireless headset. Generally, the embodiments of the invention include establishing a first voice path through at least one switching element between a calling party and a called party in a communication network where at least one of the called and calling parties is communicating with the mobile station or, more generally, with a wireless telephone. Thereafter, a first wireless headset communication link is established between the wireless telephone and the wireless headset unit.

Abstract: A wireless terminal displays its location and navigation information (map segment) on its display. The wireless terminal accesses a Global Positioning System (GPS) receiver of the wireless terminal to determine its location coordinates. The wireless terminal determines a maximum data size for navigation information to be downloaded. The wireless terminal sends a navigation information download request to a map server via a supporting wireless network infrastructure that includes the location coordinates and the maximum data size. The wireless terminal receives navigation information that has a data size no greater than the maximum data size and displays the navigation information on the display. The wireless terminal may display a map segment and an icon representing the wireless terminal at a location corresponding to the location coordinates of the wireless terminal with respect to the map segment. The wireless terminal may download a premises map from a premises map server.

Abstract: A power amplifier circuit including a first transistor, a second transistor, and a power control circuit. The first transistor includes a first input and a first output. The second transistor includes a second input coupled in series with the first output of the first transistor. The input circuit is coupled to the first input of the first transistor. The power control circuit is coupled to the second input of the second transistor. The control circuit includes a time delay circuit and a variable source.

Abstract: Methods, systems and computer program products for global address space management are described herein. A System on Chip (SOC) unit configured for a global address space is provided. The SOC includes an on-chip memory, a first controller and a second controller. The first controller is enabled to decode addresses that map to memory locations in the on-chip memory and the second controller is enabled to decode addresses that map to memory locations in an off-chip memory.

Abstract: Methods, systems, and apparatuses for circuit boards are provided herein. An electrically insulating material is formed over one or more traces on a circuit board. One or more further electrically conductive features are present on the circuit board. A layer of an electrically conductive material is formed over the one or more traces that is electrically isolated from the one or more traces by the electrically insulating material, and is in electrical contact with the one or more further electrically conductive features. The electrically conductive material confines magnetic and electric fields produced when the one or more traces conduct an alternating current. By confining the magnetic and electric field distributions in this manner, problems of interference and/or crosstalk with adjacent signal traces are reduced or eliminated.

Abstract: A system and method for global power management in a power over Ethernet (PoE) chassis. Power supply status signals indicative of an operating condition of a plurality of power supplies are provided to a plurality of power sourcing equipment (PSE) controller chips in a plurality of blades of a chassis system. Pre-configured combination logic within each of the PSE controller chips converts an indicated operational state of the plurality of power supplies into a powering decision for each of the ports served by the PSE controller chip. Global power management is also effected through the use of scaling factors for the various blades to ensure that the lowest priority powered port (LPPP) in a first blade does not have a lower priority than the highest priority non-powered port (HPNPP) in a second blade.