Patent application number | Description | Published |
20090097534 | APPARATUS AND METHOD FOR RECEIVING MULTIPATH SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - An apparatus and method for receiving a multipath signal in a wireless communication system are provided. The apparatus includes a sample buffer, a buffer index controller, a finger, and a Deskewer buffer and combiner. The sample buffer stores sample data corresponding to a defined number of chips among reception data converted into digital signals. The buffer index controller controls a position of the sample buffer to store the converted data and a position of the sample buffer to output data. The finger receives sample data from a specific position of the sample buffer and demodulates each multipath signal. The Deskewer buffer and combiner eliminates a temporal retard of each demodulated multipath signal and combines the multipath signals. | 04-16-2009 |
20090304063 | EQUALIZER BASED RECEIVER OPERATION METHOD AND APPARATUS IN A MOBILE COMMUNICATION SYSTEM - An equalizer based receiver operation method and apparatus in a mobile communication system are provided. The method includes estimating a channel for a multi path receive signal, analyzing a delay profile of a multi path channel, and selecting a tap position from a plurality of tap positions of an equalizer depending on the analyzed delay profile. | 12-10-2009 |
20100008452 | METHOD AND APPARATUS FOR ESTIMATING DOPPLER FREQUENCY IN A MOBILE TERMINAL - A method and apparatus for estimating a Doppler frequency in a mobile terminal are provided. The method includes calculating two autocorrelation values for intervals of at least one sample from a channel estimation tap with a maximum power, and estimating a maximum Doppler frequency using the two autocorrelation values. The two autocorrelation values are autocorrelation values for intervals of different numbers of samples. | 01-14-2010 |
20100098145 | APPARATUS AND METHOD FOR CHANNEL ESTIMATION IN MOBILE COMMUNICATION SYSTEM - An apparatus and method for reducing power consumption of a receiver of a mobile communication system are provided. The apparatus includes an adaptive multi-tap segment channel estimator for determining a segment size according to a delay spread value for each channel tap, for determining a channel estimation frequency by determining a sum of segment block energy, and for allocating each segment to the channel estimator. | 04-22-2010 |
20100150090 | CONTROL CHANNEL ELEMENT DETECTION METHOD USING CQI IN A WIRELESS COMMUNICATION SYSTEM - A control channel element detection method and apparatus is provided for detecting the Control Channel Elements (CCEs) carrying control information for a mobile station using a Channel Quality Indicator (CQI). A CCE detection method includes searching a current subframe for CCEs, and locating the CCEs carrying control information for the mobile station by decoding the current subframe with variable code rates. Searching for the CCEs includes searching the current subframe for the CCEs carrying the control information for the mobile station while changing a size type of the CCEs according to a result of a comparison between a CQI of the current subframe and a CQI of a previous subframe. | 06-17-2010 |
20100158089 | CHANNEL ESTIMATION METHOD AND APPARATUS FOR WIRELESS COMMUNICATION SYSTEM - A channel estimation method and apparatus using a self-tracking algorithm is provided for improving channel estimation accuracy. The channel estimation apparatus of a mobile terminal includes a receiver for converting a received radio signal into a baseband signal, a match filter for converting the baseband signal into a digital signal including at least two samples, a channel estimator for buffering the samples, for analyzing multipath signals to predict a maximum power position and multipath energy, and for estimating a channel by selecting a multi-tap at the maximum power position through a slew control, an equalization controller for calculating an equalization tap gain using the multi-tap selected by the channel estimator, and an equalizer for compensating for distortion in the samples output by the channel estimator using the equalization tap gain calculated by the equalization controller. | 06-24-2010 |
20100254275 | APPARATUS AND METHOD FOR TRANSMISSION TIME INTERVAL RECONFIGURATION IN A MOBILE COMMUNICATION SYSTEM - An apparatus and method for Transmission Time Interval (TTI) reconfiguration in a mobile communication system are provided. The apparatus includes an ACK/NACK determiner, an ACK/NACK controller, and a TTI controller. The ACK/NACK determiner determines if a response signal to be transmitted is ACKnowledgment (ACK) or Non ACKnowledgment (NACK) depending on an error or non-error of data received from a User Equipment (UE). The ACK/NACK controller counts the ACK and NACK determined in the ACK/NACK determiner. The TTI controller indentifies if number of the latest ACKs counted in the ACK/NACK controller is continuously generated by preset number of times and, if it is continuously generated by the present number of times, reconfigures a new TTI. | 10-07-2010 |
20110038438 | APPARATUS AND METHOD FOR TRANSPORTING/RECEIVING DATA IN A CDMA MOBILE COMMUNICATION SYSTEM - A data transportation/reception apparatus and method in a mobile communication system. The data transportation apparatus and method divides transport data bits into bits having higher priority and bits having lower priority, maps the bits having higher priority to bit positions having higher reliability, and maps the bits having lower priority to bit positions having lower reliability. The data reception apparatus and method demodulates received modulated symbols, divides the demodulated coded bits into two coded bit groups according to priority, deinterleaving the coded bit groups using different deinterleavers, and decodes the deinterleaved coded bits. | 02-17-2011 |
20110085591 | RECEIVING DEVICE AND METHOD OF MOBILE COMMUNICATION SYSTEM - An apparatus and a method for generating statistical signals having a characteristic similar to an input signal of a receiving apparatus to determine an optimized filter coefficient through an adaptive equalization algorithm are provided. The apparatus includes a channel estimator, a statistical signal generator, and an adaptive algorithm processor. The channel estimator estimates a channel of a reception signal. The statistical signal generator generates a plurality of signals having the same characteristic as that of a reception signal using a channel determined through a channel estimation process. The adaptive algorithm processor performs an adaptive equalization algorithm using the plurality of generated signals to determine an optimized filter coefficient. | 04-14-2011 |
20110119552 | METHOD AND APPARATUS FOR CONTROLLING ITERATIVE DECODING IN A TURBO DECODER - A method and apparatus for controlling iterative decoding in a turbo decoder are provided, in which a maximum number of iterations is determined for current data to be decoded based on at least one of current HARQ information necessary for a HARQ operation of the current data, previous HARQ information about previous data, and early stop information indicating whether iterative decoding of the previous data was early stopped. A turbo decoder iteratively decodes the current data within the maximum number of iterations. | 05-19-2011 |
20110124345 | METHOD AND APPARATUS FOR PERFORMING COORDINATED MULTI-POINT TRANSMISSION AND RECEPTION IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for performing a Coordinated Multi-Point (CoMP) transmission in a wireless communication system are provided. An operating method of a base station for the CoMP transmission in a wireless communication system includes performing a cell clustering for CoMP transmission of a terminal, receiving a reference signal from the terminal, determining cell IDentifier (ID) information of the terminal, when the terminal uses a cell ID for the CoMP transmission, comparing a Channel Quality Indicator (CQI) value of the reference signal with a threshold, and when the CQI value of the reference signal is greater than or equal to the threshold, participating in the CoMP transmission of the terminal. | 05-26-2011 |
20110283169 | APPARATUS AND METHOD FOR RATE DEMATCHING IN A COMMUNICATION SYSTEM - An apparatus and method for rate dematching in a communication system are provided. The apparatus includes an input sequence generator, an error calculator, and a puncture/repetition determiner. The input sequence generator calculates if current input data among data, which are input in interleaved sequence, corresponds to any n | 11-17-2011 |
20130034140 | APPARATUS AND METHOD FOR ESTIMATING DOPPLER SPREAD IN MOBILE COMMUNICATION SYSTEM - An apparatus and a method for estimating a Doppler frequency in a mobile communication system are provided. The apparatus includes an estimator for temporarily estimating a maximum Doppler frequency based on channel values sampled according to a first period in a frame, a detector for calculating at least one correlation value between at least one channel value additionally sampled in the frame and at least one channel value sampled over the first period, and for determining whether aliasing occurs based on the correlation value, and a determiner for determining a final maximum Doppler frequency according to the occurrence or non-occurrence of the aliasing. | 02-07-2013 |
20130050094 | METHOD AND APPARATUS FOR PREVENTING MALFUNCTION OF TOUCHPAD IN ELECTRONIC DEVICE - A method and an apparatus for preventing a malfunction of a touchpad in an electronic device are provided. The method includes determining whether one or more input signals is continuously received due to one or more keys of a key input unit being continuously depressed, and controlling an activation state of the touchpad according to the determination result. | 02-28-2013 |
20130143627 | ELECTRONIC DEVICE - An electronic device is provided. The electronic device includes an output unit, a storage unit, an antenna, a sensor, and a controller. The output unit outputs a video or voice. The storage unit stores information about a user interface operation. The antenna transmits/receives a wireless signal of a corresponding communication frequency band and is moveable. The sensor acquires information of at least one motion of the antenna. The controller processes a wireless signal through the antenna and outputs the user interface operation according to the information received from the sensor, to the output unit with reference to the information of the storage unit. | 06-06-2013 |
20140098799 | APPARATUS AND METHOD FOR TRANSMITTING TIME INTERVAL RECONFIGURATION IN A MOBILE COMMUNICATION SYSTEM - Methods and apparatus are provided for transmitting and receiving data in a wireless communication system. A number of errors for a received data is determined. A power boosting message is generated and transmitted based on the number of errors to a transmitting apparatus such that the transmitting apparatus is configured to transmit data using a boosting power. | 04-10-2014 |
20140254583 | APPARATUS AND METHOD FOR ACHIEVING SYNCHRONIZATION IN WIRELESS COMMUNICATION SYSTEM - A method of operating a terminal that is related to achieving synchronization in a wireless communication system is provided. The method includes receiving signals with a bandwidth comprising a plurality of channels, selecting at least one channel group to attempt to detect based on radio frequency level per a reception signal, wherein the channel group denotes a set of channels that belongs to one bandwidth, and performing a synchronization procedure on each of channels that belong to the at least one channel group selected. | 09-11-2014 |