Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

Dong Jo Park

Jung Hyun Park

Hyun Ho Choi

Won Jae Shin

Yong Ho Cho

Chang Yong Shin

Young Jun Hong

Won Jong Noh

Kyung Hun Jang

Dong Ho Cho

Jung Min Moon

Sang Uk Park

Joon Tae Kim

Hyo Sun Hwang

Hyun Gi Ahn

In Sun Lee

Tae In Hyon

Seung Won Choi

Chang Bae Yoon

A method of assigning and managing reference signals in a multi-cell environment, and a network device and a terminal for applying the method, are provided. Reference signal patterns may be assigned to multiple femtocells through a long term coordination of a central control unit that is used to control multiple cells.

Method for assigning and managing reference signals in a multi-cell environment, and network device and terminal for applying the method

Provided is a communication method of a base station and a terminal for enhancing a recovery performance of a signal using a feedback control message. The feedback control message may include information about a target received power at the base station with respect to feedback information of each of a plurality of terminals and information associated with a feedback mode of the feedback information.

Communication method of a base station and a terminal

A cognitive radio (CR) communication apparatus and method is provided. A cognitive radio (CR) communication apparatus includes a signal receiving unit which receives signals from a primary user of a primary system and a secondary transmitter of a secondary system, the received signals including an element associated with at least one known signal of the secondary transmitter, and a determination unit which determines whether a signal of the primary user exists from among the received signals based on the element associated with the at least one known signal.

Cognitive radio communication system recognizing interference based on known signal

Provided is a communication method of a neighboring terminal and a target terminal in which a cooperative terminal that has a better SINR or a better channel condition provides help to a target terminal through cooperation between terminals based on a random access mode or a scheduling mode, so that an SINR of the target terminal is improved without help from a base station.

Communication method of neighboring terminal and target terminal

Provided is a cooperative communication technology of a target terminal and a cooperative terminal. In an environment in which interference exists between cells, cooperation between terminals may be performed in order to improve quality of signals that are received from a base station.

Cooperative communication methods and a device for a target terminal and a cooperative terminal

A communication method for at least one mobile station that includes a target mobile station that performs a Cooperative Multi-Point (CoMP) communication with at least two base stations, is provided. The communication method includes determining a beamforming vector used by the at least two base stations based on channel vectors and at least one channel matrix such that a signal-to-leakage-plus-noise-ratio (SLNR) for a target antenna from among antennas of a target mobile station is maximized. A Cholesky factorization may be used to determine an optimal beamforming vector with a low complexity.

Communication system using joint leakage suppression scheme with low complexity

A low density parity code (LDPC) encoding and decoding devices and encoding and decoding methods thereof are provided. An LDPC encoding device includes an information obtaining unit which obtains status information of at least two frequency bands, a matrix generation unit which generates a parity check matrix based on the status information, the parity check matrix including sub matrices which correspond to the at least two frequency bands, and an encoder which generates data bits and parity bits using an LDPC with the generated parity check matrix.

Low density parity code encoding device and decoding device and encoding and decoding methods thereof

An interference determination apparatus, including a signal receiver to receive a first signal of a primary network and a second signal of a secondary network; a correlator to compute a correlation value of a first cyclic prefix included in the first signal and a correlation value of a second cyclic prefix included in the second signal; and an interference determination unit to determine an interference level or whether the interference occurs between the primary network and the secondary network, using the correlation value of the first cyclic prefix and the correlation value of the second cyclic prefix.

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Daejeon, South Korea

Dong Jo Park