公开(公告)号：US09306702B2

公开(公告)日：2016-04-05

申请号：US14695989

申请日：2015-04-24

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： Jaeyoung Kwak ,  Robert L. Olesen ,  Aykut Bultan ,  Eldad M. Zeira ,  Changsoo Koo ,  Fatih M. Ozluturk ,  Yuejin Huang ,  Kalpendu R. Pasad

IPC: H04L27/26 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06

CPC classification number: H04L1/0606 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/066 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/006 ,  H04L27/156 ,  H04L27/2626 ,  H04L2027/0046 ,  Y02B70/30 ,  Y02D50/10

Abstract: The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes.

公开(公告)号：US20150381319A1

公开(公告)日：2015-12-31

申请号：US14846055

申请日：2015-09-04

Applicant: InterDigital Technology Corporation

Inventor： Jaeyoung Kwak ,  Chang-Soo Koo ,  Robert L. Olesen ,  Aykut Bultan ,  Fatih Ozluturk

IPC: H04L1/06 ,  H04L5/00 ,  H04B7/04

CPC classification number: H04L1/0606 ,  H04B7/0408 ,  H04B7/0413 ,  H04B7/0697 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/04 ,  H04L5/0007 ,  H04L25/0248 ,  H04L27/2601 ,  H04L27/2626 ,  H04L27/2647

Abstract: A method and apparatus for combining space-frequency block coding (SFBC) in a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system is described herein. A transmitter, according to one embodiment, may include four antennas and circuitry configured to transmit in an OFDM symbol time period using both frequency diversity and SFBC. For frequency diversity at least one first data element may be repeated producing at least two second data elements and the two second data elements are transmitted using different subcarriers. For space frequency block coding, a pair of third data elements may be space frequency block coded producing four fourth data elements. The four fourth data elements may be transmitted using two subcarriers and only two of the four antennas.

Abstract translation: 本文描述了用于在多输入多输出（MIMO）正交频分复用（OFDM）系统中组合空频块编码（SFBC）的方法和装置。 根据一个实施例的发射机可以包括四个天线和配置成在OFDM符号时间周期内使用频率分集和SFBC两者进行发送的电路。 对于频率分集，可以重复产生至少两个第二数据元素的至少一个第一数据元素，并且使用不同的子载波来发送两个第二数据元素。 对于空间频率块编码，一对第三数据元素可以是空间频率块编码，产生四个第四数据元素。 四个第四数据元素可以使用两个子载波发送，并且仅四个天线中的两个。

公开(公告)号：US20140010323A1

公开(公告)日：2014-01-09

申请号：US14021783

申请日：2013-09-09

Applicant: InterDigital Technology Corporation

Inventor： Jaeyoung Kwak ,  Robert Lind Olesen ,  Aykut Bultan ,  Elad Zeira ,  Chang-Soo Koo ,  Fatih Ozluturk ,  Yuejin Huang ,  Kalpendu R. Pasad

IPC: H04L27/156

CPC classification number: H04L1/0606 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/066 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/006 ,  H04L27/156 ,  H04L27/2626 ,  H04L2027/0046 ,  Y02B70/30 ,  Y02D50/10

Abstract: The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes.

Abstract translation: 本发明涉及一种用于在正交频分复用（OFDM）无线通信系统中实现空间频率块编码（SFBC）的方法和装置。 本发明适用于闭环模式和开环模式。 在闭环模式中，基于信道状态信息（CSI）执行功率负载和特征波束形成。 信道编码数据流被多路复用成两个或多个数据流。 基于每个复用数据流上的CSI执行功率加载。 对每个配对子载波的数据流执行SFBC编码。 然后，基于CSI执行特征波束形成，以将本征束分布到多个发射天线。 功率加载可以在两个或更多个SFBC编码块上或在每个本征模上执行。 另外，对于弱本征模式，可以跨子载波或子载波组执行功率负载。