Patent application number | Description | Published |
20110210952 | SYSTEM AND METHOD FOR MONITORING A SIGNAGE SYSTEM OF A TRANSIT VEHICLE - A sign-monitoring system includes at least one electronic sign and a controller comprising a processor and memory. The electronic sign includes a pixel array, the pixel array including a plurality of pixels. The electronic sign further includes an embedded controller coupled to the at least one electronic sign. The embedded controller develops diagnostic information for the at least one electronic sign, the diagnostic information including information related to a number of malfunctioning pixels in the plurality of pixels. The controller is communicably coupled to the embedded controller and receives at least a portion of the diagnostic information from the embedded controller. In addition, the controller assesses the at least a portion of the diagnostic information to develop health information. The assessment involves evaluating the information related to the number of malfunctioning pixels. | 09-01-2011 |
20110225859 | LCD TFT SIGN FOR ON-BOARD USE IN PUBLIC TRANSPORTATION - An LCD destination sign is provided that provides a high resolution image and operates in at least two modes. One mode is a destination message mode that is used when a destination message (i.e., a route number and/or destination name in substantially static alphanumeric or symbols) is to be displayed on the destination sign. The second mode is a non-destination mode wherein graphic images are displayed on the destination sign, wherein such graphic images do not provide a destination message and may include video feeds, weather forecasts or newsreels. | 09-22-2011 |
20110273875 | DIRECT LED LIGHTING SYSTEM AND METHOD - A direct lighting system and method is provided that includes a plurality of light-emitting diodes (LEDs) secured within a light fixture. The lighting system further includes a diffusive transmissive element adapted to transmit light from the LEDs therethrough and provide diffused light to an area requiring illumination. | 11-10-2011 |
20120324771 | DISPLAY DEVICE FOR TRANSPORTATION VEHICLE - Disclosed is a displayed device having a top and bottom elongate rail and a display module for displaying alpha numeric information to passengers on a mass transit vehicle. The display modules may be mounted along a top and bottom edge directly to the top and bottom elongate rails. End caps are mounted to the ends of the elongate rail forming a structurally sound frame about the display module. | 12-27-2012 |
20140022792 | DISPLAY DEVICE FOR TRANSPORTATION VEHICLE - Disclosed is a displayed device having a top and bottom elongate rail and a display module for displaying alpha numeric information to passengers on a mass transit vehicle. The display modules may be mounted along a top and bottom edge directly to the top and bottom elongate rails. End caps are mounted to the ends of the elongate rail forming a structurally sound frame about the display module. | 01-23-2014 |
20140157636 | LCD TFT SIGN FOR ON-BOARD USE IN PUBLIC TRANSPORTATION - An LCD destination sign is provided that provides a high resolution image and operates in at least two modes. One mode is a destination message mode that is used when a destination message (i.e., a route number and/or destination name in substantially static alphanumeric or symbols) is to be displayed on the destination sign. The second mode is a non-destination mode wherein graphic images are displayed on the destination sign, wherein such graphic images do not provide a destination message and may include video feeds, weather forecasts or newsreels. | 06-12-2014 |
Patent application number | Description | Published |
20140029689 | Method in a Wireless Communication System - The present invention relates to a method including signalling by a receive node at least one first transmission rank r to a transmit node, where 1≦r≦R, wherein R is a maximum available rank for a transmission, and at least one predefined precoding matrix corresponds to said first transmission rank r, determining by said transmit node a second transmission rank r′ for transmitting data from said transmit node to said receive node, where 1≦r′≦R, defining at least two subsets of precoding matrices for at least one of said at least one first transmission rank r, selecting one of said at least two subsets of precoding matrices in accordance with a channel quality estimate for a radio channel, and signalling said selected one subset of precoding matrices, wherein said selected one subset of precoding matrices is associated with said at least one predefined precoding matrix. | 01-30-2014 |
20140029695 | Method and Apparatus for Open Loop Transmission in a Multiple Antenna Wireless Communication System - The invention concerns a method for precoding in an open loop transmission communications system, wherein the method includes precoding data at each of M REs with a precoding matrix, precoding each of DM-RSs with one column of a precoding matrix which is same as that used for precoding M data REs. The method is distinguished by using at least L≧2 different precoding matrices from a set of precoding matrices W to precode the M REs and the E allocated REs such that REs precoded with a first precoding matrix are interleaved with REs precoded with at least one additional, different precoding matrix and the number of used precoding matrices L is adapted to the transmission rank r and number N of available DM-RS. The invention further concerns a radio transmitter and a user equipment. | 01-30-2014 |
Patent application number | Description | Published |
20090323861 | System and Method for Blind Compensation and Correction of Transmitter IQ Imbalance at the Receiver - Systems and methods of correcting for a transmitter IQ imbalance are disclosed. Various embodiments collect statistics related to a received packet on a transceiver. These statistics include one or more transmitter imbalance parameters. In some embodiments, an estimated inversion matrix is calculated based on the imbalance parameter and a correction for the IQ imbalance is made by applying the inversion matrix to a sub-carrier and the sub carrier's image. | 12-31-2009 |
20090325516 | System and Method for IQ Imbalance Estimation Using Loopback with Frequency Offset - Systems and methods for estimating IQ imbalance in a communication system are provided. In various embodiments, a device is configured to perform a self-characterization. The self-characterization is performed over an RF loopback circuit. In some embodiments, a probe is transmitted over the RF loopback circuit. The probe uses a frequency offset such that an image related to one IQ imbalance is separated from an image related to another IQ imbalance. An imbalance estimate is calculated based on processing of the probe. | 12-31-2009 |
20100158171 | Estimation of noise variance combined with narrow-band interference detection - Method and apparatus are provided for estimating noise variance using a long-term data aided algorithm and an interference variance using a short-term data aided algorithm. Using these estimations, an interference hypothesis may be determined. Some embodiments compute the variance for a decision directed noise sample, convert the variance for the decision directed noise to a true noise variance per packet, and convert the variance for the decision directed noise to a true noise variance per symbol. The interference hypothesis may be based on the noise variance estimations per symbol and the noise variance estimation per packet. Some embodiments determine the presence of noise based on a comparison of the noise variance per packet, the noise variance per symbol, and each hypothesis and compute the long-term noise variance. Using the long-term noise variance in place of the variance for a decision directed noise sample for a subsequent determination of interference. | 06-24-2010 |
20110021153 | CENTRALIZED CROSS-LAYER ENHANCED METHOD AND APPARATUS FOR INTERFERENCE MITIGATION IN A WIRELESS NETWORK - Apparatus and methods for improving the throughput and capacity of a wireless communications network. In one embodiment, this improvement is accomplished by focusing upon reduction of the co-channel interference, including the interferences that are unpredictable or undetectable to a traditional network. Various implementations detect the receiver interference (i.e. the interference affecting the receiver performance) at the transmitting node in order to avoid or reduce its effect at the receiving node. This detection can be as simple as e.g., spectral sensing constituting power measurement, and/or can be more sophisticated such as measurements including bandwidth, duty cycle and statistical behavior of the unwanted signal. | 01-27-2011 |
20110090885 | METHODS AND APPARATUS FOR CENTRALIZED AND COORDINATED INTERFERENCE MITIGATION IN A WLAN NETWORK - Method and apparatus for interference mitigation in wireless local area networks (such as WLANs). In one embodiment, a centralized interference measurement and mitigation method is disclosed. The method may involve spectral sensing, beamforming, MIMO, power control, MAC scheduling using a cross-layer approach, and/or broadcast channel precoding, employed towards performance enhancement of WLAN networks in presence of interference. In one variant, different actions at interference mitigation are selected based on the source of the interference (e.g., inter-network or intra-network). | 04-21-2011 |
20110170424 | APPARATUS AND METHODS FOR INTERFERENCE MITIGATION AND COORDINATION IN A WIRELESS NETWORK - Apparatus and methods for interference mitigation in a wireless network, such as e.g., a wireless LAN. In one embodiment, substantially centralized RF spectrum monitoring is used as a basis of enabling interference mitigation for, e.g., mobile units such as computer and smartphones within the wireless network. | 07-14-2011 |
20140086077 | Method and Apparatus for Combined Adaptive Beamforming and MIMO in Indoor Wireless LAN - A wireless local area network (WLAN) device comprising a processor, a transceiver coupled to the processor, a switching mechanism coupled to the transceiver, a beamforming antenna assembly coupled to the switching mechanism, and a multiple input, multiple output (MIMO) antenna assembly coupled to the switching mechanism. Included is an apparatus comprising a processor and a memory coupled to the processor, wherein the memory comprises instructions that cause the processor to calibrate a WLAN device, select an optimal antenna configuration, track the WLAN device performance, and wait for a triggering event. Also included is an adaptive antenna method comprising calibrating a WLAN device, selecting an optimal antenna configuration, tracking the WLAN device performance, and waiting for a triggering event. | 03-27-2014 |
20140185443 | DATA OPTIMIZATION TECHNIQUE FOR THE EXCHANGE OF DATA AT THE EDGE OF A WIRELESS LOCAL AREA NETWORK - An apparatus for the transmission of management and/or control traffic in a network, comprising a memory configured to store a first record of management and/or control data from a previous interval, and a processor coupled to the memory, wherein the processor is configured to retrieve the first record, receive a second record of the network management and/or control data for a current interval, and generate a differential of the first and second records. | 07-03-2014 |
20140187174 | Smart Antenna Platform for Indoor Wireless Local Area Networks - An apparatus comprising a first dipole antenna, a beamforming antenna array (BFAA), a first switch coupled to the dipole antenna, a second switch coupled to the BFAA, and a processor coupled to the first switch and the second switch, wherein the processor is configured to select between a multi-input, multi-output (MIMO) antenna configuration and a beamforming configuration by setting the states of the first switch and the second switch. | 07-03-2014 |
20150017985 | SYSTEMS AND METHODS FOR HANDOFF IN HETEROGENEOUS NETWORKS - Computer implemented methods, systems, and computer readable media provided herein may identify contextual information associated with buffer management and data delivery for a handoff between radio access technology points of attachment for a client device. Whether to perform the handoff based on the contextual information and quality of experience (QoE) parameters for an application on the client device may be determined. The handoff may be executed based on the contextual information associated with buffer management and data delivery. An ongoing connection may be reestablished for control and multimedia data flow for the client device. | 01-15-2015 |