A wireless power transfer method for a wireless power transfer apparatus using full and half-bridge inverter topologies includes detecting whether or not a wireless power receiver (200) is present within a range of power being transferrable in a wireless manner, transmitting a detection signal to the wireless power receiver (200), receiving at least one of identification information and setting information from the wireless power receiver (200), receiving a control error packet from the wireless power receiver (200), and controlling an amount of power to be transferred by using the combination of a driving frequency, a duty cycle or a power signal phase to the full or half-bridge inverter.

Wireless power transfer method, apparatus and system

A block-request streaming system provides for improvements in the user experience and bandwidth efficiency of such systems, typically using an ingestion system that generates data in a form to be served by a conventional file server (HTTP, FTP, or the like), wherein the ingestion system intakes content and prepares it as files or data elements to be served by the file server, which might or might not include a cache. A client device can be adapted to take advantage of the ingestion process as well as including improvements that make for a better presentation independent of the ingestion process. In the block-request streaming system, the an ingestion system generates data according to erasure codes and the client device, through various selection and timing of requests for media data and redundant data, can efficiently decode media to provide for presentations.

Enhanced block-request streaming using cooperative parallel HTTP and forward error correction

This technology pertains to a data-processing device and a data processing method that make it possible to ensure good communication quality when using an LDPC code to transmit data. In group-wise interleaving, an LDPC code having a code length (N) of 16,200 bits and a code rate (r) of 10/15 or 12/15 is interleaved on a per-bit-group basis, each bit group being 360 bits long. In group-wise deinterleaving, the interleaved LDPC code is restored to the original ordering thereof. This technology can be applied, for example, to data transmission or the like using an LDPC code.

Data processing device and data processing method

A block request streaming system provides for improvements in the user experience and bandwidth efficiency of such systems, typically using an ingestion system that generates data in a form to be served by a conventional file server (HTTP, FTP, or the like), wherein the ingestion system intakes content and prepares it as files or data elements to be served by the file server. The system might include controlling the sequence, timing and construction of block requests, time based indexing, variable block sizing, optimal block partitioning, control of random access point placement, including across multiple presentation versions, dynamically updating presentation data, and/or efficiently presenting live content and time shifting.

Enhanced block-request streaming system using signaling or block creation

There is provided an information processing device including a display section configured to display a first object in a virtual three-dimensional space having a depth direction of a display screen, an operation section configured to acquire an operation for moving the first object in at least the depth direction, and a controller configured to move the first object on the display screen in accordance with the acquired operation, to execute, when a region of the first object overlaps a first overlap determination region, a first process to one or both of the first and second objects, and to execute, when the region of the first object overlaps a second overlap determination region, a second process to one or both of the first and second objects. The first overlap determination region may be a region obtained by extending the second overlap determination region in at least the depth direction.

Information processing device, information processing method, and program

An operation method of station in wireless local area network is provided The operation method includes generating a legacy preamble, generating a high efficiency (HE) preamble including at least one HE-signal (HE-SIG) field, a HE-short training field (HE-STF), and at least one HE-long training field (HE-LTF), and generating a HE physical layer convergence procedure protocol data unit (HE-PPDU) including the legacy preamble and the HE preamble Therefore, performance of WLAN can be enhanced

Wireless local area network communications with varying subcarrier spacings

Provided are a receiver of a Multiple Input Multiple Output (MIMO) system, QR decomposition and multi-dimensional detection used in the receiver. The receiver includes: a QR decomposing unit for performing a QR decomposing operation in cycles 1 to n T -n−1, and performing a column exchanging operation in cycles n T -n to n T as QR decomposition where n and T are an integer number; and a multi-dimensional detecting unit for receiving a first R matrix R y and a second R matrix R z from the QR decomposing unit, calculating a first distance value for detecting an m th symbol for the first R matrix and a second distance value for detecting an m th symbol for the second R matrix, and simultaneously detecting an m th symbol and an (m−1) th symbol using the first distance value and the second distance value.

Mimo receiver, qr decomposition and multi-dimensional detection used in the mimo receiver

Provided is a method and apparatus for allocating resources in a wireless local area network (WLAN) system, the method including determining a restricted access bandwidth (RAB) interval based on at least a bandwidth or a partial bandwidth among a plurality of bandwidths, and setting a restricted access window (RAW) of a time domain based on the RAB interval.

Method and device for allocating resource in wireless lan system, communication terminal method and communication terminal

In this paper, a receiver algorithm for an 8x8 MIMO system is considered for Giga-bps data transmission, in which the decoding complexity and latency are crucial factors for implementation of MIMO system with large number of transmit and receive antennae. To reduce computational complexity and the decoding latency, a 3-stage receiver algorithm is proposed. The MIMO receiver consists of multidimensional detection, partial interference cancellation and the weighted zero-forcing equalization, where the transmit antennae are divided into two group. The first group is encoded by a lower rate code and multidimensional search algorithm is used for demodulation and decoding, while the second group is encoded by higher rate code and weighted zero-forcing equalization is used. Once the first group is decoded successfully, they are cancelled out from the received vector for the decoding of the second group. The complexity and the error rate performance are investigated and compared with a well-known sphere decoding algorithm.

A new MIMO algorithm for high data rate transmission

Disclosed are a channel accessing apparatus and a method thereof. An channel accessing method by an access point having a sector antenna in a wireless LAN system according to an embodiment of the present invention includes: transmitting a sector beacon with respect to one of a plurality of sectors; transmitting and receiving data to and from at least one station in the one sector during a sector interval of a preset time; sequentially performing an operation of transmitting the sector beacon with respect to remaining sectors except for the one sector among the sectors and an operation of transmitting and receiving the data; transmitting an ombi-beacon with respect to all the sectors; and transmitting and receiving the data to and from at least one station in the sectors during a BSS interval of the preset time. [Reference numerals] (410) Transmit sector beacon with respect to one of sectors; (420) Transmit and receive data to and from station in sector during sector interval; (430) Sequentially perform steps 410 and 420 for remaining sectors; (440) Transmit ombi-beacon with respect to all sectors; (450) Transmit and receive data to and from the station in sectors during BSS interval; (AA) Start; (BB) End

Minho Cheong

Papers

Wireless local area network communications with varying subcarrier spacings

Mimo receiver, qr decomposition and multi-dimensional detection used in the mimo receiver

Method and device for allocating resource in wireless lan system, communication terminal method and communication terminal

A new MIMO algorithm for high data rate transmission

Channel accessing apparatus and method using the same