Patent application number | Description | Published |
20140197956 | PARTICLE DETECTOR WITH DUST REJECTION - A system and method of reducing the incidence of false alarms attributable to dust in smoke detection apparatus. The method includes obtaining at least two sample air flows, subjecting a first airflow to particle reduction and measuring the level of particles in the first airflow and generating a first signal indicative of the intensity. The method also includes measuring the level of particles in the second airflow and generating a second signal indicative of the intensity. The first signal is compared to a predetermined alarm level and, if the alarm level is achieved, the first and second signals are subsequently compared and an output signal is generated based on the relative difference between the first and second signals. | 07-17-2014 |
20150177137 | METHOD OF DETECTING PARTICLES BY DETECTING A VARIATION IN SCATTERED RADIATION - A smoke detecting method which uses a beam of radiation such as a laser ( | 06-25-2015 |
20150253165 | ADDRESSABILITY IN PARTICLE DETECTION - A method of determining at least one point of entry of smoke into a smoke detection system, the system having a sampling pipe network including at least one sampling pipe and a plurality of sampling inlets through which an air sample can enter the at least one sampling pipe of the smoke detection system for analysis by a particle detector, said method including: determining a volume of sample air that has passed through at least part of the smoke detection system since a predetermined event or a value corresponding to said volume; and determining through which sampling inlet of the plurality of sampling inlets the smoke entered the smoke detection system based, at least in part, on the determined volume or value. Systems for implementing such a method and related methods are also described. | 09-10-2015 |
20160033400 | DETECTION OF PARTICLE CHARACTERISTICS - A method of detecting particles in an air flow is described. The method includes receiving a signal indicative of light intensity scattered from the air flow at a plurality of wavelengths and processing the signal indicative of the intensity of received light at each of the wavelengths and a corresponding wavelength dependent parameter to generate an output signal indicative of at least one characteristic of particles in the air flow. A particle detection system is also described. | 02-04-2016 |
Patent application number | Description | Published |
20150103515 | LIGHTING ASSEMBLY - A lighting assembly including a shell, wherein the shell includes an inner wall defining an inner lumen, an outer wall encircling the inner wall, a set of radial fins connecting the inner and outer walls, the set of fins cooperatively defining a set of cooling channels between adjacent fins, the inner wall, and the outer wall; an insert removably mounted within the inner lumen, the insert defining a power storage lumen; a power storage unit arranged within the power storage lumen; a circuit board coupled to the power storage unit, the circuit board comprising a processor and communication module; a lighting module electrically connected to the circuit board, wherein the lighting module includes a substrate and a set of light emitting elements mounted to a first broad face of the substrate. | 04-16-2015 |
20150342006 | DIRECTIONAL LIGHTING SYSTEM AND METHOD - The method of spatial lightbulb operation includes determining the position of the lightbulb relative to a physical space, detecting a contextual event, determining a spatial lighting pattern associated with the contextual event, and selectively controlling lightbulb light emitting elements based on the position of the lightbulb and the spatial lighting pattern. A lightbulb including: a plurality of individually controlled light emitting elements mounted in fixed, predetermined positions on the substrate; a light sensor mounted to the substrate; a wireless communication module; and a processor configured to: index each light emitting element; progress each of the plurality of light emitting elements through an orientation pattern; associate a reference point on the lightbulb with an external reference point; and selectively operate individual light emitting elements of the plurality according to lighting instructions, based on a relationship between the reference point on the lightbulb and the external reference point | 11-26-2015 |
20160007431 | SWITCH AND METHOD OF OPERATION - A control system including: a base including a central axis; a knob rotatably connected to the base, the knob rotatable about the central axis; a plurality of individually indexed light emitting elements distributed along the base perimeter and arranged to direct light radially outward of the central axis; a diffuser arranged radially outward of the light emitting elements; a wireless communication module enclosed between the knob and base; and a processor enclosed between the knob and base, the processor connected to the wireless communication mechanism and plurality of light emitting elements, the processor configured to individually control each light emitting element based on a control signal received from the wireless communication mechanism. | 01-07-2016 |
20160044766 | DIRECTIONAL LIGHTING SYSTEM AND METHOD - The method of spatial lightbulb operation includes determining the position of the lightbulb relative to a physical space, detecting a contextual event, determining a spatial lighting pattern associated with the contextual event, and selectively controlling lightbulb light emitting elements based on the position of the lightbulb and the spatial lighting pattern. A lightbulb including: a plurality of individually controlled light emitting elements mounted in fixed, predetermined positions on the substrate; a light sensor mounted to the substrate; a wireless communication module; and a processor configured to: index each light emitting element; progress each of the plurality of light emitting elements through an orientation pattern; associate a reference point on the lightbulb with an external reference point; and selectively operate individual light emitting elements of the plurality according to lighting instructions, based on a relationship between the reference point on the lightbulb and the external reference point | 02-11-2016 |
Patent application number | Description | Published |
20150130359 | RESETTABLE LIGHTING SYSTEM AND METHOD - A lighting system, including: light emitting elements; a reset switch operable in a first and second state; non-volatile reset memory configured to record the state of the reset switch when power is provided to the system; a wireless communication system; non-volatile communication memory configured to store default settings and configuration settings; a control system operable, in response to initial power provision to the control system, between: a configured mode when an instantaneous reset switch state matches the recorded state, the configured mode including: connecting the wireless communication system to a remote device based on the configuration settings, receiving instructions from the remote device, and controlling light emitting element operation based on the instructions; and a reset mode when the instantaneous reset switch state differs from the recorded state, the reset mode including: erasing the configuration settings from the communication memory and operating the system based on the default settings. | 05-14-2015 |
20160066397 | RESETTABLE LIGHTING SYSTEM AND METHOD - A lighting system, including: light emitting elements; a reset switch operable in a first and second state; non-volatile reset memory configured to record the state of the reset switch when power is provided to the system; a wireless communication system; non-volatile communication memory configured to store default settings and configuration settings; a control system operable, in response to initial power provision to the control system, between: a configured mode when an instantaneous reset switch state matches the recorded state, the configured mode including: connecting the wireless communication system to a remote device based on the configuration settings, receiving instructions from the remote device, and controlling light emitting element operation based on the instructions; and a reset mode when the instantaneous reset switch state differs from the recorded state, the reset mode including: erasing the configuration settings from the communication memory and operating the system based on the default settings. | 03-03-2016 |
Patent application number | Description | Published |
20130094620 | ESTIMATION OF A MULTIPATH SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - Described herein is a method and system for estimating a time-varying multipath communication channel. The system comprises a receiver for receiving a signal comprising a data packet transmitted over the multipath communication channel. The system also comprises a frequency-domain channel estimator that generates a frequency-domain channel estimate based on the received signal. The system further comprises a time-domain channel modeller that receives the frequency-domain channel estimate and generates an estimate of parameters in a time-domain model of the multipath communication channel. The model characterises the multipath communication channel as a delay line with a plurality of taps, each tap having tap parameters defining a delay, a Doppler and a gain for the tap. The tap parameters are constant over the data packet. | 04-18-2013 |
20130337855 | INTELLIGENT TRANSPORTATION SYSTEMS DEVICE - An Intelligent Transportation Systems (ITS) device is described. The ITS device ( | 12-19-2013 |
20140349601 | METHOD AND SYSTEM FOR COMMUNICATION IN A WIRELESS NETWORK - Methods and apparatus are described for processing data in a wireless communication network. Iterative estimation techniques are used to enable tracking of time-varying communication channels. A signal is transmitted over a channel in the network, the signal comprising a sequence of symbols carried on a plurality of sub-carriers. Boot-up estimator estimates, in a time domain, parameters of a model of the channel based on the received signal. A domain converter transforms at least one of the estimated parameters from the time domain to provide at least one transformed parameter in a second domain. An equalizer and decoder determine estimates of symbols from the received signal using the at least one transformed parameter, and tracking estimator updates the estimated model parameters during reception of the signal using at least one estimated symbol. | 11-27-2014 |
20150103959 | RECEIVER PERFORMANCE IN A COMMUNICATION NETWORK - Methods and apparatus are described for improving receiver performance in a multicarrier communication network in which an encoded symbol is transmitted over a transmission channel in the communications system. A model of the transmission channel is estimated, said model characterising an effect of intercarrier interference on at least one carrier in the multicarrier system. The received symbol is decoded using the estimated model to remove a predicted effect of intercarrier interference. A pre-processor is also described for operation in conjunction with a communications receiver in the network. The pre-processor includes a channel estimator operable to estimate at least one feature of the communication channel based on a received signal. The pre-processor modifies the received signal dependent on the at least one estimated feature and provides the modified signal to the communications receiver. | 04-16-2015 |
20160099816 | RECEIVER PERFORMANCE IN A COMMUNICATION NETWORK - Methods and apparatus are described for improving receiver performance in a multicarrier communication network in which an encoded symbol is transmitted over a transmission channel in the communications system. A model of the transmission channel is estimated, said model characterising an effect of intercarrier interference on at least one carrier in the multicarrier system. The received symbol is decoded using the estimated model to remove a predicted effect of intercarrier interference. A pre-processor is also described for operation in conjunction with a communications receiver in the network. The pre-processor includes a channel estimator operable to estimate at least one feature of the communication channel based on a received signal. The pre-processor modifies the received signal dependent on the at least one estimated feature and provides the modified signal to the communications receiver. | 04-07-2016 |
Patent application number | Description | Published |
20080247450 | Method and System For Communication in a Wireless Network - The present application discloses a number of inventions directed to method(s), apparatus and/or networks and systems adapted to track time varying channels, adapted to synchronise packets arriving at a receiver, adapted to correlate a received signal, adapted to manage digital resources, adapted to receive a signal and/or adapted to enable communication in a wireless packet based communications network. | 10-09-2008 |
20080317150 | FILTER STRUCTURE FOR ITERATIVE SIGNAL PROCESSING - The present invention relates to improved multiple access communications. In one form, the invention relates to an improved signal processing method and apparatus for an iterative method of determining the reception of a signal in a multi user packet based wireless OFDM (Orthogonal Frequency Division Multiplexing) communication system. In other forms the present invention provides recursive filtering for joint iterative decoding in a variety of systems and functions such as linear multiple access channel decoders, iterative equalisation, iterative joint channel estimation and detection/decoding, iterative space-time processing, iterative multi user interference cancellation and iterative demodulation. In one particular form the present invention provides an iterative decoding circuit for a wireless multiuser communications receiver comprising a first signal processing means for receiving at least one received signal, said first signal processing means comprising at least two linear iterative filters such that the first linear iterative filter provides an estimate of a selected received signal to an estimated signal output and a second linear iterative filter provides estimates of at least one other received signal, delayed by one iteration cycle, to an input of said first linear iterative filter, a second signal processing means for receiving the estimated signal output of the first linear iterative filter and providing a further received signal estimate to the input of the first signal processing means in a succeeding iteration cycle of the decoding circuit. | 12-25-2008 |
20120120945 | METHOD AND SYSTEM FOR COMMUNICATION IN A WIRELESS NETWORK - The present application discloses a number of inventions directed to method(s), apparatus and/or networks and systems adapted to track time varying channels, adapted to synchronise packets arriving at a receiver, adapted to correlate a received signal, adapted to manage digital resources, adapted to receive a signal and/or adapted to enable communication in a wireless packet based communications network. | 05-17-2012 |
20130201972 | FILTER STRUCTURE FOR ITERATIVE SIGNAL PROCESSING - A method is for communicating by tracking time varying channels in a multiple access packet based communication network. Each packet includes a preamble portion including a data symbol, and a data portion including data symbols. The method may include initializing a channel estimate reference from an initial channel estimate based upon the data symbol in a preamble portion of a received packet, and updating the channel estimate reference based upon a channel estimate of a current data symbol and a previously received data symbol from the data symbols in a data portion of the received packet. The method may also include repeating the updating upon receipt of a subsequent data symbol from the data symbols in the data portion of the received packet. | 08-08-2013 |
Patent application number | Description | Published |
20120196541 | ENVIRONMENT ESTIMATION IN A WIRELESS COMMUNICATION SYSTEM - A method and system are described for estimating an environment surrounding a wireless communication system, the environment including at least one in hector that inflects transmitted signals. An observation generator receives an input signal transmitted from a transmitter to a receiver via a wireless communication channel and also receives system state information pertaining to at least one of the receiver, the transmitter and the inflector. An observation processor uses observations from the observation generator to estimate at least one property of the inflector based on the received input signal and the system state information. | 08-02-2012 |
20120225665 | CHARACTERISATION OF A WIRELESS COMMUNICATIONS LINK - A system and method are described for characterising a wireless communications link as line-of-sight (LOS) or non line-of-sight (NLOS). The method comprises receiving data (T) representing a position of a transmitter, receiving data (R) representing a position of a receiver, receiving a measure of transmitted power at an output of the transmitter (PT) and receiving a measure of received power at an input to the receiver (PR). An NLOS detector ( | 09-06-2012 |
20130114660 | EXTRACTING PARAMETERS FROM A COMMUNICATIONS CHANNEL - A method for extracting a parameter of a communication channel from a channel estimate that characterises the communication channel in terms of a frequency response over time. The method includes generating a set of feature identifiers that characterise features of the channel, for example energy peaks or troughs and determining the parameter, for example time delay of a multipath signal or frequency offset of a multipath signal, dependent on the feature identifiers. Methods using the parameter are also described including methods to estimate the environment. | 05-09-2013 |
20130200223 | CROSSING SAFETY SYSTEM - A system is described that provides redundant communication at a railway crossing. The system comprises a first communication unit for transmitting information associated with a railway vehicle approaching or near the railway crossing on a railway track. A first active warning sign located at or near the railway crossing receives and transmits information associated with the railway crossing. The system includes an onboard equipment unit located on a roadway vehicle approaching or near the railway crossing, the onboard equipment unit comprising a second communication unit for receiving information from the first communication unit and the active warning sign; a processor for processing the received information to determine a first threat indicator indicative of a potential collision, and a user interface for communicating the threat indicator to a user. The system may include sensors to detect and communicate the presence of a train. | 08-08-2013 |