| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 455010000 | Fading compensation | 18 |
| 20090017753 | DATA COMMUNICATION IN A COOPERATIVE COMMUNICATION NETWORK - A method for communicating data from a source to a destination using a plurality of relay stations in a wireless communication system is provided. The method comprises grouping the plurality of relay stations into at least one relay station group; receiving in a relay station group a subset of data transmitted from the source; sharing information between relay stations in the relay station group for forwarding to the destination the received subset of data transmitted from the source; determining a forwarding scheme for transmitting the received subset of data; and transmitting the received subset of data to the destination using the forwarding scheme. | 01-15-2009 |
| 20090093212 | WIRELESS RELAY AMPLIFICATION APPARATUS - A wireless relay amplification apparatus includes an interference canceller which generates cancellation waves to cancel interference waves from a mobile station antenna, which are included in downlink signals received by the base station antenna, a downlink amplifier which amplifies downlink signals from which the interference waves have been canceled by the interference canceller, an uplink amplifier which amplifies uplink signals received by the mobile station antenna, a receiver which detects a level of received signals based on the downlink signals from which the cancellation waves have been canceled by the interference canceller, and outputs a propagation loss calculated based on a difference between the detected reception level and a transmission level of the base station included in notification information in the downlink signals, and a controller which controls gain of at least one of the downlink amplifier and the uplink amplifier based on the propagation loss output by the receiver. | 04-09-2009 |
| 20090286471 | Method for Allocating Power to Source and Relay Stations in Two-Hop Amplify-and-Forward Relay Multi-Input-Multi-Output Networks - Disclosed is a method for static power allocation to source and relay stations in a two-hop amplify-and-forward (AF) relay multi-input-multi-output (MIMO) network including of a source station (SS), a relay station (RS), and a destination station (DS) each transmitting signals using multiple antennas. The method performs power allocation to the SS and the RS according to the path loss, or equivalently, according to a distances, between the SS and the RS and the RS and DS. The transmit power of each transmit antenna at the SS and the power amplifying gain of the RS are determined from the power allocation outputs. | 11-19-2009 |
| 20100035542 | Radio Communication System, A Repeater Apparatus and a Control Method of the Repeater - Provided is a radio communication system including a plurality of base stations and a repeater apparatus, in which the repeater apparatus amplifies and transmits a radio signal received from at least one of the plurality of base stations, and controls a domain in which the radio signal is transmitted based on a traffic amount of each of the plurality of base stations. Accordingly, the number of installed base stations which are costly is reduced, and an operating rate of the respective base stations is gained along with the decrease in number of installed base stations. | 02-11-2010 |
| 20100221996 | APPARATUS AND METHOD FOR RF PAM GAIN STATE CONTROL IN A MOBILE COMMUNICATION SYSTEM - An apparatus and a method for controlling a gain of a Radio Frequency Power Amplifier Module (RF PAM) in mobile communication system are provided. The method includes determining whether a temperature of the portable terminal is greater than a first threshold and whether a Received Signal Strength Indication (RSSI) value of the portable terminal is greater than a second threshold under a specific condition and selectively controlling the RF PAM gain state according to the determination outcome. | 09-02-2010 |
| 20100311323 | ON-CHANNEL REPEATER AND ON-CHANNEL REPEATING METHOD - Provided are an on-channel repeater and an on-channel repeating method. The on-channel repeater includes: a receiving means for receiving a Radio Frequency (RF) signal; a subtracting means for subtracting a replica of feedback signals from the signal received by the receiving means; a replica generating means for calculating the replica based on the signal acquired from the subtraction in the subtracting means and feeding back the replica to the subtracting means; an inverse channel estimating means for estimating inverse of a reception channel based on the signal acquired from the subtraction in the subtracting means and generating filter tab coefficients; a first adaptive filtering means for compensating for channel distortion of the signal subtracted by the subtracting means based on the filter tab coefficients generated in the inverse channel estimating means; and a transmitting means for converting a signal whose channel distortion is compensated by the first adaptive filtering means into an RF signal and performing radio transmission. | 12-09-2010 |
| 20110143656 | MULTI-BAND SATELLITE COMMUNICATION FADE MITIGATION - One or more satellites may generate multiple beams. The beams may facilitate communication over multiple communication frequency bands including a relatively high capacity frequency band and a relatively fade-resilient frequency band. The beams may overlap. User terminals and/or gateways in a beam intersection may select from among the multiple communication frequency bands to communication with the satellite(s). Responsive to detection of rain fade, some of the user terminals and/or gateways may be instructed to use the relatively fade-resilient frequency band. The multiple communication frequency bands may be assigned to the user terminals and/or gateways so as to maximize total system capacity. | 06-16-2011 |
| 20110151775 | REPEATING APPARATUS AND METHOD IN WIRELESS COMMUNICATION SYSTEM - A repeating apparatus in a wireless communication system includes: a signal detection unit configured to receive a signal from a base station or a mobile station and detect strength of the signal; a control unit configured to compare the signal strength detected by the signal detection unit with signal strength predetermined by the system and provide comparison information; and an output signal control unit configured to receive the comparison information from the control unit and adjust and amplify gain of a signal transmitted to the base station or the mobile station. | 06-23-2011 |
| 20120058719 | Determining the Repeater Gain in Dependence of Interference - A method of operating a repeater in a communications system is disclosed, wherein a repeater gain to be used for the amplification of a signal is adjusted in dependence on an estimate of an interference by the repeater and by the receiver. The interference at the receiver is feed back to the relay node. | 03-08-2012 |
| 20120083203 | System and Method for Distributed Power Control in a Communications System - A system and method for distributed power control in a communications system are provided. A method for relay node operations includes transmitting a signal at a transmit power level on a first channel from a relay node to a user equipment, receiving a message comprising a first indication of channel quality of the first channel at the transmit power level, and determining a second indication of channel quality of a second channel between a communications controller and the relay node, where the first channel and the second channel are in a same multi-hop communication path. The method also includes altering the transmit power level of the first channel based on the first indication of channel quality and the second indication of channel quality to converge the channel quality of the first channel to a convergence value. | 04-05-2012 |
| 20120129448 | REPEATER DESIGN AND VERIFICATION TOOL - The performance of a repeater path may be predicted by identifying the parameters of a transmitting earth, a receiving earth station, and the component performance parameters of at least one of the gain, loss and noise figure of at least one of repeater components in the repeater path. The component performance parameters, the transmitting and receiving earth station parameters, and the predicted repeater performance may be communicated and/or displayed via a graphical user interface. | 05-24-2012 |
| 20120178361 | FADING SIGNAL FORMING DEVICE, CHANNEL SIGNAL TRANSMISSION DEVICE, AND FADING SIGNAL FORMING METHOD - Provided are a fading signal forming device, a channel signal transmission device, and a fading signal forming method, by which a complicated time-space can be constructed with a simple structure. In the fading signal forming device ( | 07-12-2012 |
| 20130157560 | Adaptive Fade Mitigation - A satellite communications system comprising a Hub station and a plurality of terminals, the system is configured to utilize a FWD link and a RTN link in accordance with adaptation techniques for relevant transmission properties (e.g. modulation, coding, transmission power, etc.) and to use adaptive margins to ensure proper reception of transmitted information under various link conditions. Methods are presented for determining said adaptive margins in real time or substantially in real time, and for setting relevant transmission properties in accordance with the determined margins. Adaptive margins may be determined either directly or following the determining of a link state for each of the FWD link and the RTN link. | 06-20-2013 |
| 20140087653 | APPARATUS AND METHOD FOR MANAGING SATELLITE SERVICE RESOURCE - An apparatus and method for managing a satellite service resource is provided. The method may include measuring, using a communication system monitoring unit, at least one satellite service signal being received for at least one satellite service, calculating, using a service resource management unit, an optimum frequency and an optimum output power for the at least one satellite service through analysis of a satellite service resource, allocating the calculated frequency and the calculated output power to the at least one satellite service, and transmitting the allocated information to the communication system monitoring unit, and comparing, using the communication system monitoring unit, the measured information to the allocated information, and transmitting a result of the comparison to the service resource management unit. | 03-27-2014 |
| 20140287678 | TRANSMISSION POWER MANAGEMENT DEVICE AND TRANSMISSION POWER MANAGEMENT METHOD - A transmission power management device including: a memory, and a processor coupled to the memory and configured to: acquire a first path loss between a first relay station and a second relay station, the first relay station relaying a first signal, the second relay station relaying a second signal, and adjust a first transmission power of the first signal by the first relay station based on the first path loss. | 09-25-2014 |
| 20140335779 | APPARATUS FOR REGULATING TRANSMISSION POWER OF REPEATER IN LONG TERM EVOLUTION SYSTEM - The present invention relates to an apparatus capable of flexibly regulating coverage of a repeater in a long term evolution system (hereinafter referred to as an LTE system). The present invention provides an apparatus for regulating transmission power of a repeater in an LTE (LONG TERM EVOLUTION) system, the apparatus including a sink signal detector that detects a sink signal of a reception signal received through an IF/RF receiver of the repeater, a sink signal power measurer that measures a size of power of the sink signal detected through the sink signal detector, and an amplification controller that calculates a gain of an amplifier of the repeater for maintaining coverage of the repeater based on the size of the power of the sink signal measured through the sink signal power measurer, and controls the amplifier of the repeater according to the calculated gain. In the present invention, in a wired or wireless repeater, it is possible to efficiently regulate the coverage of the repeater and to implement the apparatus with low complexity in the LTE system. Further, the present invention is flexibly applicable to an LTE system supporting a scalable bandwidth and it is possible to effectively regulate the coverage of multiple LTE signals using signal amplification for multiple LTE signals. | 11-13-2014 |
| 20150011157 | MULTI-AMPLIFIER BOOSTER FOR A WIRELESS COMMUNICATION SYSTEM - A multi-amplifier system includes a remote amplifier located near one or both system antennas. Locating the remote amplifier closer to the antenna improves the system performance while meeting regulatory limitations. The base unit may also have multiple remote antenna ports on one or both sides of the base unit allowing multiple remote antennas to be connected on that side of the base unit. A signal splitter with multiple antenna ports allows multiple remote antennas to be connected on the same side of the base unit. A remote amplifier located near each remote antenna removes the associated signal propagation losses from the regulated system performance. The base unit includes an amplifier detector for each remote antenna port to determine which output ports are connected to remote amplifiers. An automatic gain adjustment unit maintains the system gain, typically at the regulatory gain limit, based on the detected system configuration. | 01-08-2015 |
| 20150327190 | DETECTING UPLINK REPEATER CAPACITY - Systems, methods, and articles are provided for detecting uplink repeater capacity within a wireless network. Algorithms are used to determine when an out of power error condition is present to help minimize service quality issues. | 11-12-2015 |
