Patent application number | Description | Published |
20140270014 | METHOD AND APPARATUS FOR PERFORMING SOFT DEMAPPING IN ROTATED QUADRATURE AMPLITUDE MODULATION (QAM) BASED COMMUNICATION SYSTEM - A soft demapping apparatus and method thereof includes a pre-processing unit to pre-process a reception signal obtained from a symbol representing bits. A candidate selection unit selects two candidates from among constellation points included in a constellation for each of the bits. A distance calculation unit calculates a Euclidean distance between the reception signal and the two candidates. A log-likelihood ratio (LLR) calculation unit calculates an LLR with respect to the bits based on the Euclidean distance between the reception signal and the two candidates. | 09-18-2014 |
20150146810 | METHOD AND APPARATUS FOR PERFORMING SOFT DEMAPPING IN ROTATED QUADRATURE AMPLITUDE MODULATION (QAM) BASED COMMUNICATION SYSTEM - A method of performing a soft demapping, includes obtaining a signal from a symbol representing bits that is transmitted from a transmitter, and calculating a gradient of a reference line in a constellation for a bit based on a rotation angle and a channel state of the constellation. The method further includes selecting a candidate for each of lines that corresponds to a logic value of the bit from constellation points included in the constellation based on the signal and the gradient of the reference line, and calculating a log-likelihood ratio (LLR) of the bit based on the signal and the selected candidate for each of the lines. | 05-28-2015 |
20150327180 | METHOD AND APPARATUS FOR PERFORMING COMMUNICATION BY D2D COMMUNICATION TERMINAL - A method of controlling transmission power of a terminal performing device to device (D2D) communication in a wireless communication system, the method including receiving power control information corresponding to radio resources used for the D2D communication by the terminal from a base station, determining a first transmission power of the radio resources to be used for the D2D communication by the terminal among the radio resources, and transmitting data for the D2D communication with the determined first transmission power by using the radio resource to be used for the D2D communication by the terminal. | 11-12-2015 |
20150327191 | METHOD AND APPARATUS FOR SYNCHRONIZATION IN DEVICE TO DEVICE COMMUNICATION SYSTEM - A method for performing synchronization by a device in a device to device (D2D) communication system is provided. The method includes transmitting a first synchronization signal, and transmitting offset information indicating a time difference between a synchronization reference time of the first synchronization signal and a transmission time of the first synchronization signal. | 11-12-2015 |
20150327193 | APPARATUS AND METHOD FOR ACQUIRING D2D SYNCHRONIZATION INFORMATION - The present disclosure relates to a pre-5 | 11-12-2015 |
20150327204 | SYNCHRONIZATION METHOD AND APPARATUS FOR D2D COMMUNICATION - A synchronization method and an apparatus for Device-to-Device (D2D) communication in a User Equipment (UE) are provided. The method includes comparing a reception power of a signal received from an evolved Node B (eNB) with a first reference power, if the reception power is less than the first reference power, generating and transmitting a synchronization signal for D2D communication by operating as a synchronization reference UE, comparing the reception power of a signal received from the eNB with a second reference power, and if the reception power is greater than or equal to the first reference power and less than the second reference power, relaying a synchronization signal received from the eNB by operating as a synchronization relaying UE. | 11-12-2015 |
20150327315 | SCHEMES RELATED TO RESOURCE ALLOCATION, DISCOVERY AND SIGNALING IN D2D SYSTEMS - The present disclosure relates to a pre-5 | 11-12-2015 |
20160044619 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING SYNCHRONIZATION SIGNAL IN DEVICE-TO-DEVICE COMMUNICATION SYSTEM - The present disclosure relates to a pre-fifth generation (5G) or 5G communication system to be provided for supporting higher data rates beyond fourth generation (4G) communication system such as long term evolution (LTE). | 02-11-2016 |
20160044652 | SIGNAL TRANSMISSION/RECEPTION METHOD AND APPARATUS OF D2D TERMINAL - The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A terminal includes a transceiver configured to transmit or receive signals, and a controller configured to determine whether a current subframe is a subframe in which the terminal has to monitor a PDCCH, in response to the current subframe not being the subframe, determine whether a discovery pool for the terminal exists, and when the discovery pool for the terminal exists, operate a D2D discovery operation in the current subframe. | 02-11-2016 |