Abstract:
A read/write circuit for accessing chalcogenide non-volatile memory cells is disclosed. The read/write circuit includes a chalcogenide storage element, a voltage limiting circuit, a current-to-voltage converter, and a buffer circuit. The voltage limiting circuit, which is coupled to the chalcogenide storage element, ensures that voltages across the chalcogenide storage element will not exceed a predetermined value during a read operation. During a read operation, the current-to-voltage converter, which is coupled to the voltage limiting circuit, converts a current pulse read from the chalcogenide storage element to a voltage pulse. By sensing the voltage pulse from the current-to-voltage converter, the buffer circuit can determine a storage state of the chalcogenide storage element.
Abstract:
A multi-stage receiver and method for recovering a traffic signal embedded in at least one received signal. The multi-stage receiver includes a plurality of sequential detection stages for processing each received signal and providing successively better estimates of the traffic signal. The multi-stage receiver includes, for each received signal, a first processing stage and a second processing stage. The multi-stage receiver also includes a final processing stage connected to the second processing stages. Each first processing stage generates a first estimate of the traffic signal from the respective received signal and each second processing stage generates a set of energy values from the respective first estimate of the traffic signal and from the respective received signal. The final processing stage combines the set of energy values from each second processing stage and generates an improved estimate of the traffic signal. By employing multiple stages in the receiver, there is an improvement in successive estimates of the traffic signal.
Abstract:
The invention relates to methods and apparatus for Turbo Code interleavers for use with third generation code division multiple access (3G CDMA) data. The apparatus includes a memory for receiving and temporarily storing the data, a counter and a clock coupled to the memory and counter for synchronization. The apparatus also includes a table containing a addresses that are selected by the counter. A puncturing device coupled to the table discards addresses if they are greater than a frame size. A buffer is coupled to the memory and the clock. The memory is configured to retrieve data from the selected addresses which are not discarded and forward it to the buffer for output.
Abstract:
A method and apparatus for receiving orthogonal signals in a spread-spectrum communications system. A demodulator provides groups of de-spread samples of a processed received signal. The groups of de-spread samples are passed through an orthogonal code transformer to provide sequential transformer blocks. The blocks are buffered in sequences of 2 or 3. Then each buffered sequence is subjected to a summing, squaring and selection operation a to obtain a desired orthogonal code from each of the transformer blocks of the two or three transformer blocks.
Abstract:
A detector for detecting a traffic signal from a first demodulated signal is provided. The detector comprises a first stage for receiving the first demodulated signal and generating a first estimate of the traffic signal and a second stage connected to the first stage. The second stage receives the first demodulated signal and the first estimate of the traffic signal and generates a second estimate of the traffic signal from the first demodulated signal and the first estimate of the traffic signal. A method of detecting a traffic signal from a first demodulated signal is provided. The method comprises the steps of (a) generating an estimate of the traffic signal from the first demodulated signal using a first stage and (b) generating another estimate of the traffic signal from the first demodulated signal and the estimate of the traffic signal obtained from step (a) using a second stage.
Abstract:
A correlation arrangement comprises 2k correlators each for correlating a sub-block of k symbols of a sequence derived from a received signal of a wireless communications system with all 2k possible sequences of k binary symbols to produce a respective one of 2k correlator outputs. For PN (pseudo random noise) synchronization, for each of N candidate PN sequences, a sub-block of k binary symbols of the respective candidate PN sequence is used to select a respective one of the 2k correlator outputs as a correlation output for the sub-block, and the selected sub-block correlation outputs are accumulated for m sub-blocks to produce a correlation result for a correlation block of mk symbols. A maximum one of the N correlation results is detected and the candidate PN sequence providing this maximum is identified for PN synchronization. N, k, and m are integers. The arrangement reduces computation for large values of N and large correlation blocks.
Abstract:
Various systems and methods for implementing reputation management and intent-based security mechanisms are described herein. A system for implementing intent-driven security mechanisms, configured to: determine, based on a risk tolerance intent related to execution of an application on a compute node, whether execution of a software-implemented operator requires a trust evaluation; and in response to determining that the software-implemented operator requires the trust evaluation: obtain a reputation score of the software-implemented operator; determine a minimum reputation score from the risk tolerance intent; compare the reputation score of the software-implemented operator to the minimum reputation score; and reject or permit execution of the software-implemented operator based on the comparison
Abstract:
A disorder rock salt composition for use as a cathode active material. The stoichiometry of the lithium, niobium, oxygen, and transition metal components of the disordered rock salt is varied to improved performance in an electrochemical cell while substantially maintaining the disordered rock salt crystallographic structure.
Abstract:
Various innovations in media encoding are presented herein. In particular, the innovations can reduce the computational complexity of encoding by selectively skipping certain evaluation stages during encoding. For example, based on analysis of decisions made earlier in encoding or based on analysis of media to be encoded, an encoder can selectively skip evaluation of certain coding tools (such as residual coding or rate-distortion-optimized quantization), skip evaluation of certain values for parameters or settings (such as candidate unit sizes or transform sizes, or candidate partition patterns for motion compensation), and/or skip evaluation of certain coding modes (such as frequency transform skip mode) that are not expected to improve rate-distortion performance during encoding.