摘要:
Apparatuses and methods for transmission and reception in a Closed-Loop (CL)-Multiple Input Multiple Output (MIMO) system are provided. A codebook generation method includes determining weight vectors vi(i=1, . . . ,2L) for a codebook V(4, 1, L), where Nt of a codebook V(Nt,s,L) denotes a number of antennas, s denotes a number of streams, and L denotes a number of codebook index bits, determining a unitary matrix Ti using an i-th vector vi of the codebook V(4, 1, L), and determining an i-th matrix of the codebook V(4, 2, L) by selecting a first column of the unitary matrix Ti as a first column of a weight matrix and selecting a column selected from other columns excluding the first column of the unitary matrix Ti in a particular pattern, as a second column of the weight matrix.
摘要:
An apparatus and method for channel information feedback in a multiple antenna system are provided. The method includes selecting at least one code for at least one Eigen vector based on channel information with a serving node from a codebook including at least one code, constructing a set of codes orthogonal to a first code including the at least one selected code, and indicating the first code using an amount of information that enables expression of the codes of the codebook, indicating codes, other than the first code, in the constructed set using an amount of information that enables expression of the codes included in the set and performing feedback to the serving node.
摘要:
A system and method for transmitting/receiving a signal in a communication system are provided, in which a transmitter determines to change a transmission time of a superframe header, when a structure of a superframe is changed, determines the transmission time of the superframe header according to a result of the determination to change the transmission time of the superframe header, transmits information about the determined transmission time to a receiver, and transmits the superframe header at the determined transmission time.
摘要:
An apparatus and method for transmitting feedback information are provided. In a method of operating a transmitter for transmitting feedback information in a broadband wireless access system, the method includes estimating a channel of a second path on the basis of information of a received downlink frame, obtaining a channel representative value corresponding to the estimated channel of the second path, modulating the channel representative value by spreading the channel representative value to a sounding symbol to be transmitted, and transmitting the modulated sounding symbol through a first path.
摘要:
A method and apparatus for allocating a feedback channel in a multiple antenna communication system are provided. In a method of operating a Base Station (BS) for allocating a feedback channel in a Multi-User Multiple-Input Multiple-Output (MU-MIMO) communication system, the method includes measuring a MIMO transmission environment, determining an amount of feedback according to the MIMO transmission environment, and allocating a feedback channel according to an amount of the feedback.
摘要:
An apparatus and method for reducing the volume of a resource allocation information message in a broadband wireless communication system are provided, in which a scheduler determines whether to generate uplink control region allocation information, and a generator generates the uplink control region allocation information according to a result of the determination.
摘要:
An apparatus and method for power distribution by Frequency Allocation (FA) in a multi-band broadband wireless communication system are provided. The method includes detecting at least one of a loading value and a performance efficiency value by band, calculating a power distribution value by band using the detected value and calculating a power value by band using the calculated band power distribution value. The method and apparatus provide a scheme that can vary a power distribution of each band according to need and cope with subscriber capacity more flexibly when a plurality of diverse systems coexist.
摘要:
A resource allocation method and apparatus in a communication system having backward compatibility are provided. In a transmission apparatus, a determiner determines a first frequency band for transmitting wireless resource allocation information to a terminal from among the frequency bands supporting the communication system, a MAP generator determines at least one second frequency band over which the terminal desires to receive a service and allocates wireless resources to the second frequency band, and a transmission unit transmits the wireless resource allocation information to the terminal over the first frequency band. In a reception apparatus, a reception unit receives wireless resource allocation information over a first frequency band determined by a base station and a MAP information decrypter determines at least one service frequency band included in the wireless resource allocation information. Accordingly, the method and apparatus dynamically allocate wireless resources to a terminal when multiple systems having backward compatibility coexist.
摘要:
An apparatus and method for transmitting and receiving data in a communication system are provided. In the method, a BS selects a repeater group from among a plurality of repeater groups, for use in transmitting first data to an MS and transmits the first data to the MS according to the number of repeaters of the selected repeater group. The first data is different from data transmitted by the repeaters of the selected repeater group.
摘要:
An apparatus and method for transmitting data restoration information in a communication system are provided, in which a BS transmits first data in a first zone of a frame, transmits second data in a second zone of the frame, transmits first data restoration information for restoring the first data in the first zone, and transmits second data restoration information for restoring the second data in the second zone. The first data comprises the same data as data transmitted simultaneously by at least one repeater and the second data comprises data that is different from data transmitted by the at least one repeater.