Class / Patent application number | Description | Number of patent applications / Date published |
714796000 | Branch metric calculation | 8 |
20090024907 | CRC SYNDROME GENERATION FOR MULTIPLE DATA INPUT WIDTHS - A sequence of cyclic redundancy check syndromes can be produced based on a received sequence of sets of parallel data wherein different ones of the sets can have respectively different parallel data widths. Some of the syndromes are produced based on respectively corresponding ones of the sets that each have a first parallel data width. At least one of the syndromes is produced based on a corresponding at least one of the sets that has a second parallel data width that is less than the first parallel data width. The last syndrome of the sequence of syndromes corresponds to all of the data in the received sequence of sets. | 01-22-2009 |
20090132897 | Reduced State Soft Output Processing - An approach to reducing processing of soft output is disclosed. Candidate sequences of bits can be compared to soft output decisions to reduce at least one of the candidate sequences. Branch metric calculations can be performed for remaining candidate sequences and a most likely path can be selected from the remaining candidate sequences. | 05-21-2009 |
20090217142 | Rate control adaptable communications - Rate control adaptable communications. A common trellis is employed at both ends of a communication system (in an encoder and decoder) to code and decode data at different rates. The encoding employs a single encoder whose output bits may be selectively punctured to support multiple modulations (constellations and mappings) according to a rate control sequence. A single decoder is operable to decode each of the various rates at which the data is encoded by the encoder. The rate control sequence may include a number of rate controls arranged in a period that is repeated during encoding and decoding. Either one or both of the encoder and decoder may adaptively select a new rate control sequence based on a variety of operational parameters including operating conditions of the communication system, a change in signal to noise ratio (SNR), etc. | 08-27-2009 |
20100031130 | FORWARD ERROR CORRECTION (FEC) AND VARIABLE LENGTH CODE (VLC) JOINT DECODING - A method for decoding is provided. The method comprises the step of: using information known to a channel decoder to determine a path between two data points, whereby reducing error or bad data effects. | 02-04-2010 |
20100281348 | CALIBRATION METHOD AND CIRCUIT FOR AN ADD-COMPARE-SELECT LOOP - One embodiment of the invention features a programmable gain stage in analog update circuitry to overcome the accuracy limitation of the circuit gain and the maintenance of small finite number of possible sequence estimates. | 11-04-2010 |
20110072335 | BRANCH-METRIC CALIBRATION USING VARYING BANDWIDTH VALUES - In one embodiment, a signal processing receiver has a branch-metric calibration (BMC) unit that receives (i) sets of four hard-decision bits from a channel detector and (ii) a noise estimate. The BMC unit has two or more update blocks (e.g., tap-weight update and/or bias-compensation blocks) that generate updated parameters used by a branch-metric unit of the channel detector to improve channel detection. The two or more update blocks generate the updated parameters based on (i) the sets of four hard-decision bits, (ii) the noise estimate, and (iii) bandwidth values. The bandwidth values for at least two of the two or more update blocks are selected such that they are different from one another. Selecting different bandwidth values may reduce the bit-error rate for the receiver over the bit-error rate that may be achieved by selecting the bandwidth values to be the same as one another. | 03-24-2011 |
20130124948 | Method for Obtaining a Set of Path Metrics and Equalizer for a Receiver for Digital Data - This invention relates to methods for obtaining a bin number of path metrics. When performing such methods, a histogram is provided, which composes a bin number of values, a maximum value and a tail region left or right of the maximum value. A bin number of path metrics is obtained from said values. According to an embodiment a local extremum is removed from said tail region. According to another embodiment the tail region is forced to be convex. According to a further embodiment a maximum metric difference between neighboring metrics is ensured. | 05-16-2013 |
20140351677 | MINIMUM CUT SET EVALUATION SYSTEM, MINIMUM CUT SET CALCULATION METHOD, AND PROGRAM - The present invention is a minimum cut set calculation system for calculating minimum cut sets of a fault tree with binary decision diagram (BDD), comprising: subtracting means for, from one of two sub-BDDs of an input BDD, removing redundant paths included in the other sub-BDD using a recursive function comprised of a recursive case and a base case, wherein said subtracting means comprises equivalence removing means for, when said two sub-BDDs are equivalent, outputting a terminal node | 11-27-2014 |