摘要:
A method and apparatus for mapping a resource unit in a wireless communication system is provided. The method includes obtaining a frequency partition (FP) count (FPCT), an size of FPi (FPS) for i>0, and subband (SB) count of FPi (FPSC) for i>0 (where FPi is an ith FP), obtaining a value KSB,FPi indicating an SB count for FPi and a value KMB,FPi indicating a miniband (MB) count for FPi on the basis of the FPCT, the FPS, and the FPSC, and mapping an SB PRU including a plurality of contiguous physical resource units (PRUs) and an MB PRU including a plurality of contiguous PRUs to each FP in a granularity of a PRU set on the basis of the values KSB,FPi and KMB,FPi. Each FP can obtain a frequency selective scheduling gain based on the SB and a frequency diversity gain based on the MB.
摘要:
The present invention provides a cosmetic composition containing one or more selected from a group consisting of green tea saponin and green tea polyphenol as active ingredients. The cosmetic composition of the invention is very safe to the skin and can greatly enhance biological mechanisms in the skin, and thus can serve as an anti-aging cosmetic composition.
摘要:
The present invention relates to a method for preventing a peer discovery signal collision, which can occur in a device-to-device (D2D) communication system, and to a wireless device using same. According to one embodiment of the present invention, a method for communicating between wireless devices by using a peer discovery slot is provided. The method comprises the steps of transmitting a first peer discovery signal through a first peer discovery channel that is selected from a plurality of peer discovery channels, receiving a second peer discovery signal that is transmitted by a neighboring wireless device, confirming a second discovery channel, from which the second peer discovery signal is detected, from the plurality of peer discovery channels, and transmitting a feedback signal through a response channel that corresponds to the second peer discovery channel from a plurality of response channels.
摘要:
A method and an apparatus for performing hybrid automatic repeat request (HARQ) using constellation rearrangement and a circular buffer in a wireless communication system is provided. An encoded information bit is stored into a circular buffer. A transport block in selected from the circular buffer. A bit set comprising n bits of the transport block is mapped to a data symbol on a constellation for 2n-QAM modulation according to a first mapping order. The bit set is mapped according to a second mapping order when the bits of the transport block are subject to wrap-around at the end of the circular buffer.
摘要:
The present application discloses a method for mapping a subband/miniband in a wireless communication system. Particularly, the method comprises the steps of: dividing a system frequency band into a plurality of physical resource units (PRU); mapping the plurality of physical resource units to physical resource units of a subband (PRUSB) in accordance with a 1st rule; and mapping the plurality of physical resource units to physical resource units of a miniband (PRUMB) in accordance with a 2nd rule, wherein said 1st rule and said 2nd rule contain factors for limiting the minimum value of the gap between subbands allocated to the system frequency band.
摘要:
The present invention relates to a method in which a base station transmits a downlink signal using 8 antennas may comprise the steps of: mapping a downlink signal to N (1≦N≦4) layers; precoding the signal mapped to the N layers, by using a specific precoding matrix selected from a pre-stored codebook; subjecting the precoded signal to processing for OFDM symbol generation; and transmitting OFDM symbols through 8 antennas. The pre-stored codebook may comprise precoding matrices for the respective ranks corresponding to N, the pre-stored codebook may consist of 16 codebook indexes, and a portion of the precoding matrices for high ranks in the 16 codebook indexes may be generated from the precoding matrices for low ranks.
摘要翻译:本发明涉及一种基站使用8个天线发送下行链路信号的方法,其可以包括以下步骤:将下行链路信号映射到N(1 @ N @ 4)层; 通过使用从预先存储的码本中选择的特定预编码矩阵来预编码映射到N层的信号; 对预编码信号进行OFDM符号生成处理; 并通过8个天线发射OFDM符号。 预存的码本可以包括对应于N的各个等级的预编码矩阵,预存的码本可以由16个码本索引组成,并且可以从预编码生成16个码本索引中的高等级的预编码矩阵的一部分 低等级的矩阵。
摘要:
A method of generating a sub-packet in consideration of an offset is disclosed. A method of generating a sub-packet in consideration of an offset, for re-transmission of a packet from systematic bits and parity bits stored in a circular buffer includes turbo-coding an input bitstream at a predetermined code rate and generating and storing the systematic bits and the parity bits in the circular buffer, and deciding a starting position of the sub-packet in the circular buffer in consideration of the offset for puncturing at least a portion of the systematic bits of the circular buffer. Accordingly, it is possible to efficiently decide the starting position of the sub-packet to be transmitted adaptively with respect to a variable packet length, improving a coding gain, reducing complexity and reducing a calculation amount.
摘要:
A method and apparatus for transmitting a signal in a wireless communication system are disclosed. The signal transmission method includes grouping a plurality of subcarriers included in a first Orthogonal Frequency Division Multiple Access (OFDMA) symbol within distributed resources into a plurality of subcarrier groups, each subcarrier group having a predetermined number of subcarriers, distributing the plurality of subcarrier groups of the first OFDMA symbol according to a first permutation pattern, transmitting data in the distributed subcarrier groups of the first OFDMA symbol, grouping a plurality of subcarriers included in a second OFDMA symbol within the distributed resources into a plurality of subcarrier groups, each subcarrier group having a predetermined number of subcarriers, distributing the plurality of subcarrier groups of the second OFDMA symbol according to a second permutation pattern, and transmitting data in the distributed subcarrier groups of the second OFDMA symbol.
摘要:
A data processing method for a hybrid automatic repeat request (HARQ) is provided. Specifically, modulation can be performed according to a constellation rearrangement version (CRV) to generate a sub-packet for an incremental redundancy HARQ (IR-HARQ). When a constellation symbol modulated according to the CRV is segmented into an even symbol and an odd symbol for a plurality of transmit antennas, an identical CRV is determined for a pair of the even symbol and the odd symbol subsequent to the even symbol. When the constellation symbol modulated according to the CRV is transmitted to a receiving side, a newly generated sub-packet is retransmitted upon receiving a non-acknowledgement (NACK) signal.
摘要:
A method and an apparatus of mapping a resource unit is provided. Physical resource units (PRUs) are divided into a plurality of PRU sets. The PRUs are mapped to a subband PRU or a miniband PRU in a granularity of the PRU set. The mapping is based on the greatest common divisor of the maximum number of PRU sets. The resource unit can be effectively mapped while maximizing a frequency diversity gain of a subband PRU and a miniband PRU.