Samsung Electronics Co., Ltd.

University of Texas System

Beijing Samsung Telecom R&d Center

David Mazzarese

Dong-seek Park

Bruno Clerckx

Sang-Woo Lee

Hee-Won Kang

Shuangfeng Han

Cheng Shan

Hak-Ju Lee

Sung-ryul Yun

Chan-Byoung Chae

Ki Il Kim

Sung-Kwon Hong

Elisabeth De Carvalho

Kathiravetpillai Sivanesan

Seung-Hoon Park

Sung Jin Kim

Ho-Kyu Choi

Jong-Hyung Kwun

Robert Wendell Heath, Jr

Hyeon-Woo Lee

Eun-Taek Lim

Baowei Ji

Hyun-Kyu Yu

Do-Young Kim

Sung-Ryul Yun

Geun-Ho Lee

Petar Popovski

Jinxia Cheng

Song-Nam Hong

Eun-Yong Kim

Eun-Seok Ko

Joon-Ho Park

Jung-Soo Woo

Sang-Heon Kim

In-Soo Hwang

Junil Choi

Dong-Seek Park

Yong-Ho Park

Jin-Kyu Koo

Young-Kyun Kim

Hiroyuki Yomo

Deok-Ki Kim

Marcos Daniel Katz

Clerckx Bruno

Muhammad Imadur Rahman

Syuangfeng Han

Yang Tang

Sae Hyung Park

A method for initializing a protection device PD comprising steps of: receiving by a beacon receiver beacon information from other protection devices around the PD; sending by the beacon receiver the received beacon information to a channel monitoring decision maker within a time period set in a channel monitoring timer; determining by the channel monitoring decision maker whether there exists any primary beacon transmission device PPD; if yes, deciding the PD as a secondary beacon transmission device SPD; if no, deciding the PD as a PPD; receiving by an initialization process decision maker a determination result from the channel monitoring decision maker and determining an operation status of the PD within a time period set in the initialization process timer; outputting by the initialization process decision maker the determination result to a transmitter of the PD to decide whether the transmitter has transmitted any data or request information.

Method for initializing protection device and protection device in wireless microphone beacon system

Provided is a device and a method for eliminating inter-cell interference in Multiple Input Multiple Output (MIMO) wireless communication system. The method for operating a user equipment for eliminating the inter-cell interference includes determining one or more optimum bands among bands not requested to be restricted from a neighboring cell, determining at least one of band and Precoding Matrix Index (PMI) to be requested to be restricted to the neighboring cell among the determined one or more optimum bands, and feeding back at least one of the band and PMI to be requested to be restricted to the neighboring cell to a serving base station.

Apparatus and method for eliminating inter cell interference in multiple input multiple output wireless communication system

An apparatus and method for efficiently operating a fast feedback channel in a wireless communication system are provided. A method for operating a feedback channel in a Base Station (BS) of a wireless communication system includes identifying feedback information types of one or more feedback channels intended to be deallocated among a plurality of existing allocated feedback channels for a Mobile Station (MS), activating a bit corresponding to the identified feedback information type in a 'deallocation bitmap' field within a DownLink (DL) control signal, and transmitting the DL control signal to the MS. Among the feedback information types of the plurality of existing allocated feedback channels, the feedback information type having the smallest value corresponds to the highest priority bit among bits within the 'deallocation bitmap' field.

Apparatus and method for efficiently operating fast feedback channel in wireless communication system

A method for operating a Base Station (BS) in a wireless communication system is provided. The method comprises of receiving at least one request set for at least one neighboring cell, from at least one Mobile Station (MS), updating the at least one request set based at least in part on a serving band of each MS, and transmitting the updated at least one request set to the at least one neighboring cell, wherein the request set comprises a band and a Precoding Matrix Index (PMI) for making a use restriction or recommendation request to a neighboring cell.

Apparatus and method for mitigating inter-cell interference in multiple antenna system

A multiple input multiple output (MIMO) communication method using a codebook is provided. The MIMO communication method may use one or more codebooks and the codebooks may change according to a transmission rank, a channel state of a user terminal, and/or a number of feedback bits. The one or more codebooks may be adaptively updated according to a time correlation coefficient of a channel.

Codebook design method for multiple input multiple output system and method for using the codebook

An apparatus and method for transmitting and receiving a signal and a subcarrier allocation structure therefor in a multi-user multi-antenna communication system are provided, in which a transmitter calculates receive filters for each of a plurality of receivers or for a plurality of antennas in a receiver, determines the index of a vector having a correlation with the calculated receive filters in a preset codebook vector to be a receive filter index, and transmits the receive filter index to the receiver.

Apparatus and method for transmitting and receiving signal and subcarrier allocation structure therefor in a multi-user multi-antenna communication system

An apparatus and method for mitigating inter-cell interference in a Multiple Input Multiple Output (MIMO) system are provided. The method includes allocating a serving band for providing service to at least one Mobile Station (MS) through scheduling, receiving at least one request set for at least one neighboring cell, from at least one MS, updating the at least one request set considering a serving band of each MS, and transmitting the updated at least one request set to the at least one neighboring cell. The request set includes at least one piece of information among a band and Precoding Matrix Index (PMI) for making a use restriction request to a neighboring cell that exerts interference on an MS.

A method for triggering multicell MIMO schemes in a multiple antenna system includes transmitting, at a Mobile Station (MS), a first feedback information for single-cell closed-loop MIMO to a Base Station (BS); requesting, at the BS, Normalized Interference Power (NIP) feedback from the MS based on the first feedback information; feeding, at the MS, the NIP back to the BS; selecting, at the BS, a first NIP threshold and a second NIP threshold based on the NIP fed back from the MS; and requesting, at the MS, one of a first MIMO scheme and a second MIMO scheme by comparing the calculated first and second NIPs with the first NIP threshold and the second NIP threshold.

Method and apparatus for triggering multicell MIMO schemes in multiple antenna system

A multiple input multiple output (MIMO) communication system using an explicit feedback is provided. In the MIMO communication system using the explicit feedback, a receiver may generate an explicit feedback vector by calculating an explicit channel matrix, and by vectorizing the explicit channel matrix or an explicit channel matrix processed using a predefined function. Feedback information generated based on the explicit feedback vector may be provided to a transmitter. The transmitter may reconfigure the explicit channel matrix or the processed explicit channel matrix based on the feedback information. The transmitter and the receiver may share the explicit channel matrix or the processed explicit channel matrix using an adaptively transformed codebook.

Multiple-input multiple-output communication system using explicit feedback

A transmission/reception apparatus and a method thereof in a codebook-based multiple antenna system is provided. In a transmission method in a codebook-based Multiple Input Multiple Output (MIMO) system, feedback information is received from a receiver. A downlink Open-Loop Single User MIMO (OL SU-MIMO) codebook subset is determined within a base cookbook based on the feedback information. At least one data stream is transmitted via at least one antenna using the determined downlink OL SU-MIMO codebook subset.

Transmitting/receiving apparatus and method thereof in codebook based multiple antenna system

A method for operating a Mobile Station (MS) in a Multiple Input Multiple Output (MIMO) wireless communication system is provided. The method includes measuring channel quality for a serving Base Station (BS), if the channel quality is less than a threshold, measuring interference power from one or more neighbor BSs, determining a Precoding Matrix Index (PMI) and a priority metric for each neighbor BS, and feeding back at least one of the PMI, a PMI type indicator, the priority metric, and the channel quality to the serving BS.

Apparatus and method for inter-cell interference cancellation in MIMO wireless communication system

A multiple input multiple output (MIMO) communication method using a codebook is provided. The MIMO communication method may use one or more codebooks and the codebooks may change according to a transmission rank, a channel state of a user terminal, and/or a number of feedback bits.

An apparatus and method for interference cancellation in multiple-antenna communication system is disclosed. Accordingly, a receiver of a multiple-antenna communication system cancels interference by selecting either a multiple-symbol processing scheme or a single-symbol processing scheme depending on a signal type, thereby improving performance of the communication system.

Apparatus and method for interference cancellation in multiple-antenna communication system

According to one aspect of the present invention, there is provided a method for feeding back Channel State Information (CSI) by a Base Station (BS) in a communication system using Space Division Multiple Access (SDMA). The CSI feedback method includes grouping Mobile Stations (MSs) into at least two groups; allocating a second feedback channel over which CSI is to be fed back, to semi-orthogonal MSs having a semi-orthogonal relationship with MSs included in a first group which is one of the at least two groups, among MSs included in a second group which is one of the at least two groups and is different from the first group; receiving CSIs being fed back from the semi-orthogonal MSs through the second feedback channel; and selecting at least one MS satisfying a semi-orthogonal criterion to the MSs included in the first group from among the semi-orthogonal MSs that feed back CSIs through the second feedback channel.

SDMA communication system for feeding back channel state information and method supporting the same

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Suwon-si, South Korea

David Mazzarese