NATIONAL ICT AUSTRALIA LIMITED Patent applications |
Patent application number | Title | Published |
20160078317 | IMAGE CLUSTERING FOR ESTIMATION OF ILLUMINATION SPECTRA - This disclosure concerns processing of electronic images, such as hyperspectral or multispectral images. A processor performs a method for estimating an illumination spectrum of an image which defines an input spectrum for each point of the image. The processor determines for each point of a first set of points a measure of variation in relation to the input spectrum of that point. The processor then selects one point from the first set based on the measure of variation. The processor determines a cluster of points based on the input spectrum of the selected point and determines an estimate for the illumination spectrum based on the input spectra of points in the cluster. Since the processor selects a point based on the measure of variation and then determines a cluster based on that point, it performs better than using other methods where the cluster is determined based on a random starting point, for example. | 03-17-2016 |
20150357817 | CONTROLLING OPERATION OF POWER CONSUMING DEVICES IN AN ELECTRICAL GRID - The present invention generally relates to load control in an electrical grid ( | 12-10-2015 |
20150352364 | NEUROPROSTHETIC STIMULATION - The present disclosure relates to a method for determining stimulation parameters for a neuroprosthetic device performed by a processor of the device. Based on (i) a desired spatial pattern of neural activity, the processor determines stimulation parameters for an array of electrodes of the neuroprosthetic device. The processor determines the stimulation parameters such that a difference between (i) the desired spatial pattern of neural activity and (ii) an estimated spatial pattern of neural activity is optimised. The estimated spatial pattern of neural activity is an estimate of a response of a target neural tissue to being stimulated by the neuroprosthetic device based on the stimulation parameters. This method allows higher resolution stimulation and allows electrode arrays with higher electrode density to be usefully employed. | 12-10-2015 |
20150310349 | BAYESIAN NONPARAMETRIC METHOD FOR INFRASTRUCTURE FAILURE PREDICTION - The present invention generally relates to failure prediction of an infrastructure ( | 10-29-2015 |
20140282636 | Mobile Content Delivery System with Recommendation-Based Pre-Fetching - This invention relates to the prefetching of content items, for example, prefetching of videos, to make the content items accessible from a local data store ( | 09-18-2014 |
20140250232 | DISASTER RECOVERY FAILOVER IN CLOUD COMPUTING - This disclosure relates to creating a resource and for configuring a resource ( | 09-04-2014 |
20140214331 | COMPUTER-IMPLEMENTED METHOD AND SYSTEM FOR DETECTING INTERACTING DNA LOCI - A computer method of detecting interacting DNA loci by constructing a contingency table from samples of a first trait and samples of a second trait. The samples of the first and second trait are associated with one of a plurality of genotype calls, each relating to an interaction between multiple DNA loci. The contingency table includes frequencies of each genotype call in the samples. Based on the contingency table, measuring the association between the plurality of genotype calls and the first and second traits. Classifying the genotype calls into a first group that is statistically associated with the first trait and a second group that is statistically associated with the second trait. | 07-31-2014 |
20140094885 | ELECTRODE AND A FEEDTHROUGH FOR MEDICAL DEVICE APPLICATIONS - The present disclosure provides an electrode and an feedthrough for an implantable medical device. In one embodiment, the implantable electrode and the implantable feedthrough both comprise electrically insulating diamond material and electrically conductive diamond material that form an interface. Further, the present disclosure provides method for fabricating the implantable electrode and the feedthrough. | 04-03-2014 |
20140044348 | IMAGE QUALITY ASSESSMENT - This disclosure concerns image quality assessment. In particular, there is described a computer implemented method, software, and computer for assessing the quality of an image. For example but not limited to, quality of the image of a face indicates the suitability of the image for use in face recognition. The invention comprises determining ( | 02-13-2014 |
20130202214 | SHAPE AND PHOTOMETRIC INVARIANTS RECOVERY FROM POLARISATION IMAGES - The disclosure concerns processing of electronic images, such as hyperspectral, or multispectral images. In particular, but is not limited to, a method, software and computer for estimating shape information or a photometric invariant of a location of image of a scene. The image data ( | 08-08-2013 |
20130138652 | AUTOMATIC IDENTITY ENROLMENT - Biometric computer systems are systems which use one or biometric identifiers to enroll, verify or identify a person. This disclosure concerns the automatic enrolment of people into biometric systems. Aspects include methods, computer systems, software and biometric systems. A first biometric identifier (i.e. face) and a second biometric identifier (e.g. iris) is captured ( | 05-30-2013 |
20130132331 | PERFORMANCE EVALUATION OF A CLASSIFIER - A computer-implemented method for evaluating performance of a classifier, the method comprising: (a) comparing labels determined by the classifier with corresponding known labels; and (b) based on the comparison, estimating a probability of observing an equal or better precision at a given recall with random ordering of the labels determined by the classifier. This disclosure also concerns a computer program and a computer system for evaluating performance of a classifier. | 05-23-2013 |
20130074051 | TRACKING AND ANALYSIS OF USAGE OF A SOFTWARE PRODUCT - A method for tracking and analysing usage of a software product, comprising: (a) collecting data relating to usage of instances of the software product from multiple user devices, wherein the user devices each execute an instance of the software product instrumented to capture the data, and the collected data includes data relating to (i) features of the software product invoked on the user devices, and one or more of: (ii) any errors occurred during the use of the software product and (iii) user feedback indicating satisfaction or dissatisfaction on the software product regardless of whether an error has occurred; and (b) analysing the collected data to determine at least one sequence of the features that is likely to lead to an error and/or a sequence of the features that is likely to lead to user satisfaction or dissatisfaction of the software product for facilitating enhancement of the software product. | 03-21-2013 |
20130045696 | SWITCHING GATES MIXER - This invention concerns a sub-harmonic homodyne mixer suitable for operation at the millimetre waveband (MMW); for instance the 60 GHz RF radio band. The mixer comprises: A first pair of transistors connected together with common source and common drain, and having an input port across their gates to receive the in-phase voltage signal from a local oscillator. A second pair of transistors also connected together with common source and common drain, and having an input port across their gates to receive the quadrature voltage signal from the local oscillator. Wherein, an input voltage port is defined directly across the common sources of the first and second pairs of transistors, and an output voltage port is defined between the common drains of the first pair of transistors and the common drains of the second pair of transistors. According to another aspect the present invention is a transceiver comprising a mixer according to the first aspect. | 02-21-2013 |
20130036093 | Reliable Writing of Database Log Data - The invention concerns reliable writing of database log data, In particular, the invention concerns a computer system, methods and software to enable database log data to be written to recoverable storage in a reliable way. There is provided a computer system ( | 02-07-2013 |
20120319319 | FORMING FEEDTHROUGHS FOR HERMETICALLY SEALED HOUSINGS USING TWO-MATERIAL POWDER INJECTION MOLDING - Methods of forming a feedthrough using a mold that defines a cavity when closed and includes one or more cores configured to move in and out of the mold cavity. The methods include injecting non-electrically conductive powder injection molding (PIM) feedstock into the mold cavity to form an insulative body around a portion of each of the cores disposed in the mold cavity, removing each of the cores from the insulative body to form one or more core cavities in the insulative body, injecting electrically conductive PIM feedstock into the core cavities to form one or more conductors in the core cavities, respectively, and sintering the insulative body and the conductors to form the feedthrough. | 12-20-2012 |
20120306128 | METHODS FOR FORMING FEEDTHROUGHS FOR HERMETICALLY SEALED HOUSINGS USING POWDER INJECTION MOLDING - Methods of forming feedthroughs for hermetically sealed housings using powder injection molding, including positioning a plurality of separate electrically conductive elements in a mold, injecting non-electrically conductive powder injection molding (PIM) feedstock into the mold to form a plurality of insulative bodies around the conductive elements, sintering the insulative bodies to form the plurality of feedthroughs physically connected to one another via the conductive elements; and severing the conductive elements between neighboring insulative bodies. | 12-06-2012 |
20120282577 | MEASURING COGNITIVE LOAD - A computer implemented method for measuring a person's cognitive load comprises initially receiving | 11-08-2012 |
20120257690 | ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) - A method for improving noise performance in a Radio Frequency (RF) transmitter that makes use of Orthogonal Frequency Division Multiplexing (OFDM). The method • comprising the steps of: receiving a stream of digital data symbols in the form of symbol vectors, for RF transmission after multiplexing onto a subset of a set of sub-carriers according to OFDM and transforming each received symbol vector to the time domain; generating a first time domain cancellation vector from a basis vector that has the same dimensionality as the symbol vectors. In the frequency domain the basis vector has substantially zero value in each of the first subset of sub-carriers of the symbol vector and in the time domain the difference between a first element of the basis vector having the highest value and a second element of the basis vector having the next highest value is maximised. The method also comprises processing each symbol vector by subtracting the first cancellation vector from it to produce a modified symbol vector having reduced Peak-to-Average Power Ratio (PAPR) and then iteratively generating a new cancellation vector using the modified symbol vector, and producing a new symbol vector have reduced Peak-to-Average Power Ratio (PAPR). Other aspects include software for performing the method, an RF transmitter for transmitting OFDM with improved noise performance characteristics, and an OFDM signal with improved noise performance characteristics. | 10-11-2012 |
20120212594 | Object Tracking for Artificial Vision - This invention concerns the tracking of objects in video data for artificial vision; for instance for a bionic eye. More particularly, the invention concerns a vision enhancement apparatus for a vision-impaired user. In other aspects, the invention concerns a method for enhancing vision and software to perform the method. The image processor operates to process video data representing images of a scene. Automatically detect and track a user selected object, such as a face, in the images. And, automatically modify the video data, by reserving a user selected area of the displayed images for displaying the tracked object as a separate video tile within the scene. The separate video tile remains in the selected area despite movement of the camera relative to the scene, or movement of the user relative to the object or the scene. | 08-23-2012 |
20120207404 | ILLUMINATION SPECTRUM RECOVERY - The disclosure concerns processing of electronic images, such as hyperspectral, multispectral or trichromatic images. In particular, but is not limited to, a method, software and computer for estimating parameters of a reflectance model applied to an image is disclosed. Examples of processing of the images using the estimated parameters includes material recognition, re-colouring and re-shading of objects represented in the image. That is, a computer implemented method is provided of estimating one or more of photogrammetric parameters, Ω(u) surface shape N and index of refraction n(u,λ) represented in a reflectance image having one or more known illumination directions and a known viewing direction V, the method comprising optimising ( | 08-16-2012 |
20120197997 | Interest Management for a Virtual Environment of a Peer-to-Peer Network - The present invention relates to the provision of interest management in peer-to-peer networks that provide a virtual environment for multiple users. One example of such an environment is an online gaming environment. The invention includes a switching algorithm (FIG. | 08-02-2012 |
20120191973 | ONLINE PRESENCE OF USERS - The invention concerns presence of users, such as online presence in a broadcast domain. First one-way encrypted (e.g. hashed) presence information of multiple users is received ( | 07-26-2012 |
20120189193 | DETECTION OF OBJECTS REPRESENTED IN IMAGES - The invention relates to computer vision, in particular detection and classification of objects captured in a video stream of images. The invention provides a memory efficient method of storing images that have been pre-processed for use in object detection. The method is based on using histograms of orientation. The invention also includes methods for training and using weak classifiers that use this pre-processing of images. A first weak classifier uses the total count of two orientation values in a histogram as an index to a two dimensional confidence table to determine a confidence value. The second weak classifier projects one or more total counts of orientation values in a histogram into a scalar value that is then used in a one dimensional confidence map to determine a confidence value. Aspects of the invention include methods, computer systems and software. | 07-26-2012 |
20120183213 | ILLUMINATION SPECTRUM RECOVERY - The disclosure concerns processing of electronic images, such as hyperspectral or multispectral images. Processing of the images includes object recognition and image enhancement in a way that harnesses the information available from the image based on the wavelength indexed spectral data these types of images provide. Illumination spectrum of such an image is estimated (FIG. | 07-19-2012 |
20120161945 | NEURO-STIMULATION - The invention is a distributed implantable neuro-stimulation system, comprising an implant controller including control logic to transmit two time-varying power signals, varying between two levels and out of phase with the other, and a command signal modulated onto at least one of the power signals. One or more electrode cells, each having control logic to extract charge from the power signals and recover commands from the command signal. A two-wire bus interconnecting the implant controller and all the electrode cells, to carry one of the time varying signals in each of the two wires, and to carry the command signal. | 06-28-2012 |
20120134452 | SOFT-DEMAPPING OF QAM SIGNALS - This invention concerns soft-decision demapping of Quadrature Amplitude Modulation (QAM) signals to enable soft-decision channel decoding in a communications system. In a first aspect the invention is a method for performing the soft-decision demapping of Quadrature Amplitude Modulation (QAM) signals to enable soft-decision channel decoding in a communications system. The method comprises the steps of: Extracting baseband signals from both I-and-Q channels. Sampling the baseband signals to extract a stream of complex numbers. Converting the stream of complex numbers to frequency domain vectors with components for each subcarrier frequency. Approximating bit log-likelihood ratios for each symbol directly from the real and imaginary parts of the corresponding frequency vector, without equalisation by the estimated channel. And, soft-decoding of the channel codes using the approximated log-likelihood ratios. In other aspects the invention concerns a device for performing the method and software for performing the method. | 05-31-2012 |
20110311142 | DESCRIPTOR OF A HYPERSPECTRAL OR MULTISPECTRAL IMAGE - The disclosure concerns hyperspectral and multispectral image. The disclosure concerns the computation of a descriptor for such an image. The descriptor can be used in a range of image post-processing applications, such as classification, recognition, tracking and localisation. Aspects of the invention include a computer implemented method and a computer system. To computer the descriptor for a set of wavelength indexed bands, a band representation of the radiance measurements for that band based on a probability distribution function is computed | 12-22-2011 |
20110293141 | DETECTION OF VEHICLES IN AN IMAGE - The invention concerns a traffic surveillance system that is used to detect and track vehicles in video taken of a road from a low mounted camera. The inventors have discovered that even in heavily occluded scenes, due to traffic density or the angle of low mounted cameras capturing the images, at least one horizontal edge of the windshield is least likely to be occluded for each individual vehicle in the image. Thus, it is an advantage of the invention that the direct detection of a windshield on its own can be used to detect a vehicle in a single image. Multiple models are projected ( | 12-01-2011 |
20110260943 | INTEGRATION OF MICROSTRIP ANTENNA WITH CMOS TRANSCEIVER - A monolithic antenna element comprises a microstrip patch antenna and a ground plane, with a substrate between the patch antenna and the ground plane. A feeding via extends from the ground plane layer through the substrate to the patch antenna, connecting to the antenna distal from lateral edges of the antenna. A coplanar waveguide (CPW) feed line is formed in the ground plane layer, and interrupts and is electrically distinct from the ground plane. The CPW extends from a lateral edge of the ground layer to the feeding via. The antenna can be flip chip bonded to a CMOS die, reducing cost of millimetre wave transceivers, e.g. 57-64 GHz. The antenna is fabricated using standard PCB technology and a single substrate for the antenna. Antenna arrays can be fabricated. Appropriately designed antenna feeds, flip chip interconnects and antenna shape provide suitably broad antenna bandwidth, with relatively high efficiency. | 10-27-2011 |
20110213974 | IDENTIFYING RELATIONSHIPS BETWEEN USERS OF A COMMUNICATIONS DOMAIN - The invention enables identifying relationships between users of a online communications domain such as a social networking website. First identification tokens | 09-01-2011 |
20110207099 | MEASURING COGNITIVE LOAD - This invention concerns measuring cognitive load. A word based input is produced by a person while performing a task ( | 08-25-2011 |
20110191067 | COMPACT REPRESENTATION OF A REFLECTANCE SPECTRUM - The invention concerns the compact representation of a reflectance spectrum of a material. For example, for in compression, identification and comparison of reflectance spectrum data of multiple materials. The compressed representation interpolating a spline curve to the reflectance spectrum data, the spline curve having a set of control points, a knot vector, and representing wavelength and reflectance as functions of an independent parameter ( | 08-04-2011 |
20110167410 | MULTI LANGUAGE SOFTWARE CODE ANALYSIS - The invention concerns the analysis of software code that includes code that is written in multiple languages. In particular the invention concerns, but is not limited to, static analysis on source code of an embedded system that has source code that is written in a low-level language embedded within a high level language. The invention provides transforming | 07-07-2011 |
20110164789 | DETECTION OF VEHICLES IN IMAGES OF A NIGHT TIME SCENE - The invention concerns the detection of vehicles in images of a night time scene. In particular, but not limited to, the invention concerns a traffic surveillance system that is used to detect and track vehicles to determine information about the detected and tracked vehicles. Candidate pair of headlights are identified | 07-07-2011 |
20110082723 | RATING AGENTS PARTICIPATING IN ELECTRONIC TRANSACTIONS - This invention concerns computer system and method for rating agents participating in electronic transactions. In particular, the invention provides a computer system for rating agents participating in electronic transactions, the system comprising a data store to store a set of rules to describe expected behaviours of a first agent for interactions that take place during an electronic transaction with a second agent, wherein at least one rule describes the expected behaviours in terms of a primary expected behaviour and at least one alternative expected behaviour. The system also comprises a monitoring engine operable to monitor actual behaviours of the first agent for interactions that place during the electronic transaction; and a compliance engine operable to calculate a degree of compliance between the monitored actual behaviours and the expected behaviours. | 04-07-2011 |
20100262214 | STITCHED COMPONENTS OF AN ACTIVE IMPLANTABLE MEDICAL DEVICE - An active implantable medical device (AIMD) comprising an implantable electronics module and a tissue interface. At least one of the electronics module and the tissue interface comprises an electrically non-conductive, biocompatible and needle-piercable base having one or more biocompatible electrically conductive strands of conductive filaments stitched to the base. As used herein, stitching a conductive filament to a base refers to sewing, embroidering or otherwise securing the filament to the base through the use of hand or machine needlework. | 10-14-2010 |
20100262208 | ELECTRONICS PACKAGE FOR AN ACTIVE IMPLANTABLE MEDICAL DEVICE - An electronics package for an active implantable medical device (AIMD). The electronics package comprises: a biocompatible, electrically non-conductive and fluid impermeable planar substrate usable for semiconductor manufacturing; one or more active components on the surface of the substrate; a biocompatible and fluid impermeable cover bonded to the surface of the substrate to hermetically seal the one or more active components between the substrate and the cover; and a conductive region formed on at least one of an exposed surface of the substrate and the cover electrically connected to at least one of the one or more hermetically sealed active components. | 10-14-2010 |
20100246906 | FACE RECOGNITION - This invention concerns computer based face recognition. A person's face is captured in an image and received ( | 09-30-2010 |
20100217097 | MEASURING COGNITIVE LOAD - This invention concerns a method for measuring cognitive load of a person in performing a task. In other aspects the invention can be expressed as a computer and as software that are used to perform the method. The computer ( | 08-26-2010 |
20100205590 | AUTOMATING DYNAMIC PROGRAMS - Solving combinatorial optimisation problems using dynamic programming involves automating the integration of bounds propagation into compilation of a dynamic program. This is done by extracting bounds from partial results obtained during dynamic programming, and tightening the bounds throughout execution of the dynamic program. This dramatically reduces the number of “good” solutions that need to be constructed at each stage, improving speed and scalability of algorithms using such dynamic programming. | 08-12-2010 |
20100202546 | CARRIER FREQUENCY OFFSET ESTIMATION FOR MULTICARRIER COMMUNICATION SYSTEMS - The present invention relates to a method for carrier frequency offset (CFO) estimation for multicarrier communication systems. More particularly, but not limited to, the invention relates to CFO and timing estimation in communication systems that utilise multiple carriers to transmit signals. The multicarrier communication system has a large number of possible integer CFOs. First the received signal is auto-correlated ( | 08-12-2010 |
20100146128 | DECENTRALISED MULTI-USER ONLINE ENVIRONMENT - Protocols for facilitating a peer-to-peer real time network in which network state information and data processing is delegated to user nodes. A virtual space is recursively divided into a plurality of sub-regions represented by a logical tree, with responsibility for leaf nodes delegated to multiple user nodes. A distributed hash table can be used to store leaf node state and identity information. A discovery index protocol is provided for user nodes to effectively identify a user node responsible for a sub-region of interest. Further, a semantic filtering protocol limits communications primarily to other user nodes deemed relevant, so as to constrain bandwidth usage. A broadcast control protocol is provided to increase the number of simultaneous interactions for each user node. A security protocol is also provided to prevent any illegal activity by malicious nodes. | 06-10-2010 |
20100097957 | DISCOVERY OF MULTIPLE INTER-NODE LINKS IN WIRELESS MULTI-HOP NETWORKS - An extension to reactive ad-hoc routing protocols in multi-hop wireless mesh networks. The protocol discovers bi-directional links during route establishment, particularly multiple links between a single pair of nodes. Source and intermediate nodes transmit a route request, at least one of the nodes transmitting the route request on more than one wireless interface. Upon receiving a route request, each node creates at least one reverse link to the node from which the route request was received. The destination and intermediate nodes transmit, via at least one of the reverse links, at least one route reply which enables a node receiving the route reply to identify one or more wireless interfaces of the node transmitting the route reply. Upon receiving a route reply, each node creates at least one forward link to the node from which the route reply was received. Routes may then be established using any discovered bidirectional link. | 04-22-2010 |
20100070008 | KNITTED ELECTRODE ASSEMBLY FOR AN ACTIVE IMPLANTABLE MEDICAL DEVICE - An active implantable medical device (AIMD). The AIMD comprises an electronics module; and a knitted electrode assembly comprising: at least one biocompatible, electrically non-conductive filament arranged in substantially parallel rows each stitched to an adjacent row, and at least one biocompatible, electrically conductive filament intertwined with the at least one non-conductive filament, and configured to be electrically connected to the electronics module. | 03-18-2010 |
20100070007 | KNITTED ELECTRODE ASSEMBLY AND INTEGRATED CONNECTOR FOR AN ACTIVE IMPLANTABLE MEDICAL DEVICE - An active implantable medical device (AIMD). The AIMD comprises: a knitted electrode assembly comprising: at least one biocompatible, electrically non-conductive filament arranged in substantially parallel rows each stitched to an adjacent row, and at least one biocompatible, electrically conductive filament having a first end intertwined with a first row of the at least one non-conductive filament, and a second end intertwined with a second row of the at least one non-conductive filament, wherein the first and second rows are spaced from one another. | 03-18-2010 |
20100069835 | KNITTED CATHETER - A medical device, comprising: an elongate tubular knitted catheter comprising at least one biocompatible, electrically non-conductive filament arranged in longitudinally adjacent substantially parallel rows each stitched to an adjacent row. | 03-18-2010 |
20100042559 | METHOD AND APPARATUS FOR AUTOMATED IDENTIFICATION OF SIGNAL CHARACTERISTICS - A method of assessing a signal to identify particular signal characteristics comprises application of machine learning to multi-dimensional histograms derived from multi-tap sampling of the signal. The signal is sampled from at least two tap points to retrieve a sample set, and the at least two tap points are adapted to retrieve distinct samples from the signal, such as time spaced samples or spectrally distinct samples. Multiple sample sets are retrieved from the signal over time. The at least two dimensional histogram is built from the joint probability distribution of the plurality of sample sets. A machine learning algorithm then processes the multi-dimensional histogram, and is trained to predict a value of at least one characteristic of the signal. | 02-18-2010 |
20100014510 | PACKET BASED COMMUNICATIONS - This invention is applicable to packet based, rate limited radio links, such as satellite or terrestrial wireless digital communications systems. These communications networks concurrently carry time-critical traffic, such as voice or multimedia, and non time-critical traffic, such as generic data traffic, between two or more communication end points. The communication end points may be connected through a number of heterogenous networks and the end to end throughput characteristics may vary over time. A first aspect of the invention concerns a method for generating packets. In other aspects the invention concerns a computer system for use in packet based communications, a computer protocol for packet based communications and a communications packet. The invention involves determining a “time slice” packet size from the link speed and the interval of time extending between the times at which packets are selected for output from a buffer to the transmission interface. It also involves creating a network packet from frames of time-critical data generated during the interval, where the packet is synchronised to both existing timing requirements of the time-critical frames and the link speed. Then, adding non time-critical data to the network packet if its size had not exceeded the determined “time slice” packet size. | 01-21-2010 |
20090307664 | GENERATING A TRANSITION SYSTEM FOR USE WITH MODEL CHECKING - The invention concerns model program analysis of software code using model checking. Initially, a transition system ( | 12-10-2009 |
20090298443 | HIGH-ISOLATION TRANSMIT/RECEIVE SWITCH ON CMOS FOR MILLIMETER-WAVE APPLICATIONS - A CMOS monolithic transmit/receive switch comprises a single pole double throw switch (SPDT) module operable to selectively connect an antenna port to either a transmit port or to a receive port. A transmit matching network comprising a first transmission line matches the impedance of the transmit port of the SPDT module to a transmit impedance, and a first shunt transistor is operable to selectively ground a transmitter end of the first transmission line. A receive matching network comprising a second transmission line matches the impedance of the receive port of the SPDT module to a receive impedance, and a second shunt transistor is operable to selectively ground a receiver end of the second transmission line. | 12-03-2009 |
20090222419 | SUCCINCT INDEX STRUCTURE FOR XML - Succinct data and index structures aim to maximize the efficiency of update and search operations on any data while setting the constraint of storage size to be close to the theoretical optimum. The succinct index structure of the invention indexes data represented in a hierarchical structure. The index is comprised of a symbol table of all distinct root-to-leaf paths as keys or unique element tag names as keys, wherein an entry for a key in the symbol table holds transformed topological information of nodes associated with the key together (FIG. | 09-03-2009 |
20090220016 | INTERFERENCE REDUCTION IN A COMMUNICATION SIGNAL - The invention concerns the reduction of interference in a communication signal sent through a communication channel, where this interference is a performance limiting factor. The communication channel is any channel that can be described with memory elements. A Soft Input Soft Output receiver of a communication signal receives the communication signal and a priori information about the communication signal. Next creating candidate vectors having 1 to K samples by iteratively drawing samples using Gibbs sampling and using the a priori information. If a drawn kth sample of a candidate vector has not changed value for a predetermined number of created candidate vectors, then the value of the drawn kth sample is changed. | 09-03-2009 |
20090177528 | ELECTRONIC MEDIA SYSTEM - The invention is a digital information display system ( | 07-09-2009 |
20090103666 | CHANNEL ESTIMATION FOR RAPID DISPERSIVE FADING CHANNELS - This invention addresses the problem of channel estimation in fast fading communications channels, particularly for OFDM systems. It finds wide application in existing and future systems such as WLAN and WiMax. In particular, the invention involves a method of channel estimation and data detection for rapid dispersive fading channels due to high mobility. The invention involves decoding a symbol of the received transmission by retrieving pilot tones from it and using these to estimate variations in the channel frequency response using an iterative maximum likelihood channel estimation process, in which the estimation process comprises the following steps: In a first iteration, deriving soft decoded data information, that is information having a confidence value or reliability associated with it, from the estimates of the channel frequency response for the symbol obtained from pilot tones. And, in at least a second iteration using the soft decoded data information as virtual pilot tones together with the pilot tones to re-estimate the channel frequency response for the symbol. In other aspects the invention concerns a receiver and software designed to perform the method. | 04-23-2009 |
20090028554 | METHOD AND APPARATUS FOR SAMPLED OPTICAL SIGNAL MONITORING - Monitoring an optical signal comprises sampling the optical signal from two or more distinct tap points to retrieve a sample set. Multiple such sample sets are obtained over time. A joint probability distribution or phase portrait of the sample sets is assessed for indications of optical signal quality. The tap distinction can be polarisation, for example to determine OSNR, or frequency. The tap distinction can be a time delay, which can enable diagnostic differentiation between multiple impairments, such as OSNR, dispersion, PMD, jitter, Q, and the like. Machine learning algorithms are particularly suitable for such diagnosis, particularly when provided a two dimensional histogram of sample density in the phase portrait. | 01-29-2009 |
20080205886 | Method and Device for In-Band Optical Performance Monitoring - A method and device for determining in-band noise of an optical signal. The optical signal is split to produce two optical signal components, of distinct polarisation, such that the respective noise component in each signal component is uncorrelated. The optical signal components are converted to the electrical domain to produce electrical signal components. The signal component powers are equalised either in the optical domain or the electrical domain. The equalised electrical signal components are then subtracted together to cancel the correlated portions of the signal components (e.g. the data signal), such that only uncorrelated signal components (e.g. noise) are output for measurement. | 08-28-2008 |