| Patent application number | Description | Published |
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| 20090129454 | RATE SELECTION WITH MARGIN SHARING - Rate selection with margin sharing in a system with independent data stream rates is presented. Signal-to-Noise Ratio (SNR) estimates are obtained for each stream. Rates are selected for the streams based on the SNR estimates, such that at least one data stream has an SNR margin below a threshold, each remaining data stream has an SNR margin above a respective threshold, and the total SNR margin for all streams is above a total threshold. For rate selection with margin sharing with a vector-quantized rate set, SNR estimates are obtained for usable transmission channels. The total SNR margin is determined for each rate combination based on the estimates. Each rate combination is associated with a specific number of data streams to transmit, a specific rate for each data stream, and a specific overall throughput. The combination with the highest overall throughput and non-negative total SNR margin is selected. | 05-21-2009 |
| 20090190565 | ACQUISITION OF TIMING INFORMATION IN WIRELESS COMMUNICATION SYSTEMS - A method for identifying a reference point in time in a wireless communication system includes: receiving a first repeated sequence of symbols; receiving a second repeated sequence of symbols; performing an autocorrelation between the first and second sequences of symbols; and identifying as the reference point in time an autocorrelation null between the first and second repeated sequences of symbols. Apparatus for identifying a reference point in time in a wireless communication system includes: means for receiving a first repeated sequence of symbols; means for receiving a second repeated sequence of symbols; means for performing an autocorrelation between the first and second sequences of symbols; and means for identifying as the reference point in time an autocorrelation null between the first and second repeated sequences of symbols. | 07-30-2009 |
| 20100020757 | RESOURCE ALLOCATION FOR MIMO-OFDM COMMUNICATION SYSTEMS - Techniques to schedule terminals for data transmission on the downlink and/or uplink in a MIMO-OFDM system based on the spatial and/or frequency “signatures” of the terminals. A scheduler forms one or more sets of terminals for possible (downlink or uplink) data transmission for each of a number of frequency bands. One or more sub-hypotheses may further be formed for each hypothesis, with each sub-hypothesis corresponding to (1) specific assignments of transmit antennas to the terminal(s) in the hypothesis (for the downlink) or (2) a specific order for processing the uplink data transmissions from the terminal(s) (for the uplink). The performance of each sub-hypothesis is then evaluated (e.g., based on one or more performance metrics). One sub-hypothesis is then selected for each frequency band based on the evaluated performance, and the one or more terminals in each selected sub-hypothesis are then scheduled for data transmission on the corresponding frequency band. | 01-28-2010 |
| 20100067401 | METHODS AND SYSTEMS FOR TRANSMISSION MODE SELECTION IN A MULTI CHANNEL COMMUNICATION SYSTEM - Techniques to select a suitable transmission mode for a data transmission in a multi channel communication system with multiple spatial channels having varying SNRs are presented in this disclosure. For certain embodiments, a closed-loop technique may be applied, in which back-off factors used to calculate an effective SNR value fed back to a transmitter are adjusted. An open-loop rate control scheme is also presented in which a transmitter may select a data rate and number of streams based on whether transmitted packets are received in error at a receiver. | 03-18-2010 |
| 20100166100 | MULTIPLE-INPUT, MULTIPLE-OUTPUT (MIMO) SYSTEMS WITH MULTIPLE TRANSMISSION MODES - Techniques to transmit data on a number of transmission channels in a multi-channel communication system using multiple transmission schemes requiring less channel-state information (CSI). These schemes may include a partial-CSI transmission scheme that transmits a single data stream on each transmit antenna selected for use and a “beam-forming” transmission scheme that allocates all transmit power to a single transmission channel having the best performance. Each transmission scheme may provide good or near-optimum performance for a specific range of operating conditions (or operating SNRs). These multiple transmission schemes may then be combined in a piece-wise fashion to form a “multi-mode” transmission scheme that covers the full range of operating conditions supported by the MIMO system. The specific transmission scheme to be used for data transmission at any given moment would then be dependent on the specific operating condition experienced by the system at that moment. | 07-01-2010 |
| Patent application number | Description | Published |
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| 20090327943 | IDENTIFYING APPLICATION PROGRAM THREATS THROUGH STRUCTURAL ANALYSIS - Identifying threats to an information system by analyzing a structural representation of the information system. In some embodiments, a data flow diagram corresponding to the information system is analyzed based on predefined criteria. Potential threats to elements of the data flow diagram are identified based on the predefined criteria. The threats are prioritized and provided to a user for further testing. In an embodiment, the user performs fuzz testing of application programs in the information system based on the prioritized threats. | 12-31-2009 |
| 20090327971 | INFORMATIONAL ELEMENTS IN THREAT MODELS - Excluding selected elements in a data flow diagram from a threat model. The selected elements are marked as informational. An automated threat modeling system generates a threat model report for the elements in the data flow diagram except for the elements marked as informational. Excluding the informational elements from the threat model and threat model report reduces the complexity of the threat analysis and enables a modeler to focus the threat model on elements of interest. | 12-31-2009 |
| 20090328223 | EVALUATING THE EFFECTIVENESS OF A THREAT MODEL - Evaluating a threat model for structural validity and descriptive completeness. A threat modeling application provides a progress factor or other overall score associated with the structural validity and descriptive completeness of the threat model being evaluated. The structural validity is evaluated based on a data flow diagram associated with the threat model. The descriptive completeness is evaluated by reviewing descriptions of threat types in the threat model. The progress factor encourages modelers to provide effective models to a model reviewer, thus saving time for the model reviewer. | 12-31-2009 |
| 20100293618 | RUNTIME ANALYSIS OF SOFTWARE PRIVACY ISSUES - An application may watch to see if information passes a defined trust barrier. If defined information passes a defined trust barrier, an alert may be issued. The alert may include informing a developer of the specific code section that triggered the alert. | 11-18-2010 |
