Abstract:
A method of data transmission includes determining the number of layers, generating mapping symbols by mapping modulation symbols for a first codeword and modulation symbols for a second codeword to each layer, and transmitting the mapping symbols through a plurality of antennas. At least one of the first codeword and the second codeword is mapped to at least 3 layers and the number of layers is larger than 3.
Abstract:
Provided are a method of information transmission performed by a transmitter in a wireless transmission system and an apparatus for same. Said method comprises a step wherein a first information sequence is generated based on a first transmission symbol and a first resource index, a second information sequence is generated based on a second transmission symbol and a second resource index, a third information sequence is generated based on a third transmission symbol and a third resource index, a fourth information sequence is generated based on a fourth transmission symbol and a fourth resource index, a fifth information sequence is generated based on a fifth transmission symbol and a fifth resource index, a sixth information sequence is generated based on a sixth transmission symbol and a sixth resource index; and a step wherein said first information sequence, said second information sequence, and said third information sequence are transmitted via a first antenna, and said fourth information sequence, said fifth information sequence, and said sixth information sequence are transmitted via a second antenna, respectively.
Abstract:
A method for transmitting signals for achieving diversity gain is provided. In a communication system having multiple independent transmission paths, a signal is transmitted by mapping it to different independent transmission paths at initial transmission and at retransmission, thereby obtaining diversity gain. Especially, real and ideal components of a transmission signal are mapped to different transmission paths, thereby obtaining additional gain.
Abstract:
A method and an apparatus of transmitting a control signal in a wireless communication system is provided. They generate a first-spread sequence by spreading a modulated sequence in the first slot by using a first orthogonal sequence, generate a second-spread sequence by spreading a modulated sequence in the second slot by using a second orthogonal sequence. The first spread sequence and the second spread sequence are transmitted in a subframe. A length of the first orthogonal sequence is shorter than a length of the second orthogonal sequence, the second orthogonal sequence is generated by removing at least one element included in the first orthogonal sequence, and the at least one element to be removed is identical in every index of the first orthogonal sequence.
Abstract:
The present invention relates to a method and apparatus in which a terminal transmits aperiodic sounding reference signals (SRSs) in a wireless communication system. The terminal receives a triggering bit for triggering the transmission of the aperiodic SRSs from a base station, and transmits the aperiodic SRSs through at least one uplink (UL) component carrier (CC) from among a plurality of uplink component carriers.
Abstract:
A method of performing interleaving and a data transmission apparatus are disclosed, in which interleaving is performed for input data streams using bit reverse ordering (BRO) operation. A method of performing interleaving for input data streams comprises writing respective bits of the input data stream in a row direction of a memory matrix in accordance with the input order, performing row permutation for index of each row of the memory matrix using an R-bit (R is an integer) bit reverse ordering (BRO) operation, performing pruning for a row which satisfies a given condition, performing column permutation using BRO operation for index of each column of the memory matrix, and reading to output each bit in a column direction of the memory matrix where the column permutation has been performed.
Abstract:
A method and apparatus of monitoring a control channel in a multiple carrier system is provided. A user equipment monitors a plurality of candidate control channels within a control region of a subframe and receives reference control information on a reference control channel which is successfully decoded. The user equipment monitors the control region on a basis of the reference control information and receives link control information on a linked control channel which is successfully decoded. The link control information includes resource assignment information used to receive or transmit data packets via a plurality of component carriers.
Abstract:
A method of monitoring a physical downlink control channel (PDCCH) in a wireless communication system is provided. A user equipment monitors a set of PDCCH candidates for a search space in a subframe. The search space includes a common search space monitored by all user equipments in a cell and a UE-specific search space monitored by at least one UE in the cell.
Abstract:
A method for performing a Coordinated Multi-Point (CoMP) operation and transmitting feedback information in a wireless communication system is disclosed. The method includes measuring interference levels or noise and interference variances of reference signals received from one or more neighbor cells, and transmitting to a serving Base Station (BS) information about the measured interference levels or noise and interference variances, and information about a Precoding Matrix Index (PMI) that a mobile station (MS) wants to restrict or recommend for a neighbor cell performing the CoMP operation.
Abstract:
A method and apparatus for transmitting an aperiodic sounding reference signal (SRS) in a wireless communication system is provided. The method include receiving a downlink control information (DCI) format including a triggering signal for triggering a transmission of an aperiodic SRS from a base station (BS) via a physical downlink control Channel (PDCCH), blind-decoding the PDCCH in a UE-specific search space, and transmitting the aperiodic SRS triggered based on the triggering signal to the BS.