Abstract:
Disclosed is a method for transmitting a pilot sequence, the method comprising: generating a sequence set on the basis of a baseline sequence having non-CAZAC properties; and selecting any one pilot sequence form among sequence sets corresponding to different additional information, and transmitting same to a receiver.
Abstract:
The present specification presents a configuration technique of a field for control information in a wireless communication system. Specifically, presented is a configuration technique of a signal field including user-specific information in a wireless LAN system. A plurality of MCS techniques are applied to each field of a signal field, according to the present embodiment, and each field can be ordered according to the MCS techniques. The signal field according to the present embodiment can be used for a single user or multiple users, wherein the length of each field can be determined for blind decoding of the single user and the multiple users. The signal field according to the present embodiment can be an SIG-B field according to a wireless LAN standard.
Abstract:
Provided are a method and an apparatus for transmitting data in a wireless LAN. A transmitter receives, from an access point (AP), allocation information about at least one subband from among a plurality of subbands, and transmits a physical layer protocol data unit (PPDU) in the at least one allocated subband. A guard area is defined on both ends of at least any one of the plurality of subbands.
Abstract:
Provided is a method and an apparatus of configuring a LTF sequence in a wireless LAN system. In specific, a transmitting apparatus configures a LTF sequence of a second wireless LAN system by using a LTF sequence of a first wireless LAN system. The transmitting apparatus transmits the LTF sequence of the second wireless LAN system via a PPDU including a first field region and a second field region. The LTF sequence of the second wireless LAN system includes a first LTF sequence obtained by up-scaling a frequency index of the LTF sequence of the first wireless LAN system by four times and a second LTF sequence obtained by adding a frequency index which an optimized coefficient is applied. A phase rotation is applied to the LTF sequence of first wireless LAN system as per a first frequency band.
Abstract:
Provided are a method and apparatus for transmitting a feedback frame in a WLAN system. More specifically, the first wireless STA receives a feedback request field, including an LTF, from a second wireless STA. The first wireless STA configures feedback information about a wireless channel corresponding to a predetermined frequency band using the feedback request field. The first wireless STA transmits the feedback information to the second wireless STA.
Abstract:
Disclosed are a method and an apparatus for receiving a data unit. A method for receiving a data unit in a wireless local area network can comprise the steps of: an STA transmitting an association request frame to an AP, the association request frame containing PPDU format request information; and the STA receiving, from the AP, an association response frame as a response for the association request frame, the association response frame containing PPDU format determination information, wherein the PPDU format request information can comprise PPDU format information for the AP to communicate with the STA, and the PPDU format determination information can comprise information for whether the communication will be carried out on the basis of a PPDU format.
Abstract:
A method for transmitting channel status information (CSI) via uplink in a wireless communication system includes transmitting a first precoding matrix indicator (PMI) and a second PMI at a subframe. A subsampled codebook for each of a precoding codebook for Rank-1 and a precoding codebook for Rank-2 is determined based on at least the first PMI or the second PMI. In case of the Rank-1 or the Rank-2, a number of elements for the first PMI is 8.
Abstract:
Disclosed is a pilot sequence transmission method for transmitting additional information to a receiver by shifting a pilot signal on a frequency axis or a time axis and transmitting the shifted pilot sequence. In addition, disclosed is a pilot sequence identification method for acquiring additional information transmitted from the transmitter by analyzing the pilot sequence transmitted from a transmitter so as to calculate a shifting value.
Abstract:
A method for performing a device to device (D2D) communication is performed by a first wireless device and includes receiving, by the first wireless device through a primary carrier, an allocation of a secondary carrier from a base station. Here, the primary carrier is used for data transmission and reception with the base station and the secondary carrier allocated by the base station is used for data transmission and reception with a second wireless device. The method further includes transmitting data to the second wireless device on a subframe of the secondary carrier.
Abstract:
The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for virtualizing an antenna. A method for communicating using a virtual antenna of a terminal in the wireless communication system, according to one embodiment of the present invention, comprises the steps of: configuring one or more virtual antennas according to an antenna virtualization pattern that is determined based on information indicating a movement status of the terminal and/or information indicating a communication status of the terminal; and communicating with the base station by using the one or more virtual antennas, wherein one or more physical antennas that are mapped to the one or more virtual antennas can be determined base on the direction of movement of the terminal.