公开(公告)号：AU2009201306B2

公开(公告)日：2011-09-22

申请号：AU2009201306

申请日：2009-04-03

Applicant: INTERDIGITAL TECH CORP

Inventor： LIND OLESEN ROBERT ,  PASAD KALPENDU R ,  CHANG-SOO KOO ,  OZLUTURK FATIH M ,  JAEYOUNG KWAK ,  ELDAD ZEIRA ,  YUEJIN HUANG

IPC: H04J99/00 ,  H04K1/10 ,  H04L27/08

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 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 preformed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbemas 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 the subcarriers or subcarrier groups for weak eigenmodes. C) Lu C:> Z C) Lu CD ui Lu co 00 co COMBINED co co CD C-U uj ZM m m in C9 u- C c') C, => co C-*) ZD Lu Lu I= m I Ar + -CcC co zi iE :;L i E3 C-) uj Lu 2 co CD iDui g C=) cm cn L -. J co F17 UNIT FFF UNIT c\j IFFT UNIT IFFT UNIT C\j C= Lu E5 C\i c\j Lu 2 ui 2

公开(公告)号：MY146867A

公开(公告)日：2012-09-28

申请号：MYPI20080335

申请日：2006-09-25

Applicant: INTERDIGITAL TECH CORP

Inventor： GUODONG ZHANG ,  JUNG-LIN PAN KYLE ,  LIND OLESEN ROBERT ,  YINGMING TSAI ALLAN

IPC: H04L27/26

Abstract: A MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) BEAMFORMING-BASED SINGLE CARRIER FREQUENCY DIVISION MULTIPLE ACCESS (SC-FDMA) SYSTEM IS DISCLOSED. AT THE TRANSMITTER (100), A FAST FOURIER TRANSFORM (FFT) (106A...106N) IS PERFORMED ON TRANSMISSION DATA TO GENERATE FREQUENCY DOMAIN DATA. THE FREQUENCY DOMAIN TRANSMIT DATA (107A...107N) IS MAPPED TO ASSIGNED SUBCARRIERS. AN INVERSE FAST FOURIER TRANSFORM (IFFT) (114A...114N) IS PERFORMED ON THE TRANSMIT DATA MAPPED TO THE ASSIGNED SUBCARRIERS TO GENERATE TIME DOMAIN TRANSMIT DATA (115A...115N). THE TIME DOMAIN TRANSMIT DATA (115A...115N) IS TRANSMITTED VIA ANTENNAS (118A...118N). AT A RECEIVER AN FFT IS PERFORMED ON THE RECEIVED DATA TO GENERATE FREQUENCY DOMAIN RECEIVED DATA. SUBCARRIER DEMAPPING IS PERFORMED TO EXTRACT DATA MAPPED ON THE ASSIGNED SUBCARRIERS. A CHANNEL ESTIMATOR GENERATES A CHANNEL MATRIX WHICH IS DECOMPOSED INTO UH OR VD-1UH MATRICES. A CHANNEL DISTORTION AND INTERFERENCE BETWEEN TRANSMIT AND RECEIVE ANTENNAS ARE EQUALIZED BASED ON THE DECOMPOSED CHANNEL MATRICES TO THE EXTRACTED FREQUENCY DOMAIN RECEIVED DATA.