中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

116 records (took 0.028 seconds)

    METHOD AND APPARATUS FOR COMBINING SPACE-FREQUENCY BLOCK CODING, SPATIAL MULTIPLEXING AND BEAMFORMING IN A MIMO-OFDM SYSTEM
    81.
    发明专利
    METHOD AND APPARATUS FOR COMBINING SPACE-FREQUENCY BLOCK CODING, SPATIAL MULTIPLEXING AND BEAMFORMING IN A MIMO-OFDM SYSTEM 未知

    公开(公告)号：SG170650A1

    公开(公告)日：2011-05-30

    申请号：SG2009073610

    申请日：2005-11-01

    Applicant: INTERDIGITAL TECH CORP

    Inventor： KWAK JAEYOUNG ,  KOO CHANG-SOO ,  OLESEN ROBERT LIND ,  BULTAN AYKUT ,  OZLUTURK FATIH

    IPC: H04J99/00

    Abstract: A method and apparatus for combining space-frequency block coding (SFBC), spatial multiplexing (SM) and beamforming in a multiple-input multiple-output (MIMO) orthogonal frequency division mutliplexing (OFDM) system. The system inlcudes a transmitter (110) with a plurality of transmit antennas (126) and a receiver (130) with a plurality of receive antennas (128). The transmitter generates generates at least one data stream and plurality of spatial streams (118). The number of generated spatial streams is based on the number of the transmit antennas and the number of the receive antennas. The transmitter determines a transmission scheme in accordance with at least one of SFBC (112), SM (114), and beam forming (122). The transmitter transmits data in the data stream to the receiver based on the selected transmission scheme.

    SISTEMA DE ACCESO MULTIPLE POR DIVISION DE FRECUENCIAS EN UNA SOLA PORTADORA (SCFDMA) BASADO EN LA FORMACION DE HAZ DE MULTIPLES ENTRADAS Y MULTIPLES SALIDAS(MIMO).
    83.
    发明专利
    SISTEMA DE ACCESO MULTIPLE POR DIVISION DE FRECUENCIAS EN UNA SOLA PORTADORA (SCFDMA) BASADO EN LA FORMACION DE HAZ DE MULTIPLES ENTRADAS Y MULTIPLES SALIDAS(MIMO). 未知

    公开(公告)号：ES2333050T3

    公开(公告)日：2010-02-16

    申请号：ES06815418

    申请日：2006-09-25

    Applicant: INTERDIGITAL TECH CORP

    Inventor： ZHANG GUODONG ,  PAN KYLE JUNG-LIN ,  OLESEN ROBERT LIND ,  TSAI ALAN Y

    IPC: H04L27/26 ,  H04B7/08 ,  H04L5/02

    Abstract: Un sistema de acceso múltiple por división de frecuencia en una portadora única SC-FDMA en el que una parte de una pluralidad de subportadoras es asignada a un transmisor y a un receptor para comunicación, comprendiendo el sistema: un transmisor de múltiples entradas y múltiples salidas (MIMO) que comprende: un primer conjunto de unidades de transformada rápida de Fourier (FFT), (106a....106n) para realizar una FFT en datos para la transmisión para generar datos de dominio de frecuencias; una pluralidad de unidades de correspondencia de subportadora (110a...110n) para tratar en correspondencia datos para transmisión de dominio de frecuencias sobre las subportadoras asignadas para el transmisor MIMO y un receptor MIMO; un primer conjunto unidades de transformada inversa de Fourier (IFFT), (114a...114n) para realizar una IFFT sobre datos de transmisión tratados en correspondencia a las subportadoras asignadas para generar datos de transmisión de dominio de tiempo; y una pluralidad de antenas de transmisión (118a a 118n) para transmitir los datos de transmisión de dominio de tiempo; y comprendiendo el receptor MIMO: una pluralidad de antenas de recepción (202a...202n) para recibir los datos de transmisión de dominio de tiempo transmitidos y generar múltiples corrientes de datos recibidos; un segundo conjunto de unidades FFT (206a...206n) para realizar una FFT sobre datos recibidos para generar datos recibidos de dominio de frecuencias; una pluralidad de unidades para deshacer la correspondencia de subportadora (208a...208n) para extraer datos tratados en correspondencia sobre las subportadoras asignadas; al menos un estimador de canal (214) para realizar una estimación de canal para canales MIMO entre el transmisor y el receptor para generar una matriz de canal; una unidad (216) de descomposición de matriz de canal para descomponer la matriz de canal en una matriz diagonal D y matrices unitarias U y V H , en el que un superíndice H indica una traspuesta de Hermitian; una unidad (218) de diagonalización de canal y formación de haz destinada a equilibrar una distorsión de canal aplicando una de las matrices U H o VD -11 U H a los datos recibidos de frecuencias extraídos; y un segundo conjunto de unidades IFFT (220a...220n) para realizar una IFFT sobre los datos ecualizados para generar datos recibidos de dominio del tiempo.

    86.
    发明专利
    未知

    公开(公告)号：DE602006009127D1

    公开(公告)日：2009-10-22

    申请号：DE602006009127

    申请日：2006-09-25

    Applicant: INTERDIGITAL TECH CORP

    Inventor： ZHANG GUODONG ,  PAN KYLE JUNG-LIN ,  OLESEN ROBERT LIND ,  TSAI ALAN Y

    IPC: H04L27/26 ,  H04B7/08 ,  H04L5/02

    Abstract: A multiple-input multiple-output (MIMO) beamforming-based single carrier frequency division multiple access (SC-FDMA) system is disclosed. At the transmitter, a fast Fourier transform (FFT) is performed on transmission data to generate frequency domain data. The frequency domain transmit data is mapped to assigned subcarriers. An inverse fast Fourier transform (IFFT) is performed on the transmit data mapped to the assigned subcarriers to generate time domain transmit data. The time domain transmit data is transmitted via antennas. 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 U, D and V H 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.

    MIMO beamforming-based single carrier frequency division multiple access system
    87.
    发明专利
    MIMO beamforming-based single carrier frequency division multiple access system 未知

    公开(公告)号：AU2009217368A1

    公开(公告)日：2009-10-08

    申请号：AU2009217368

    申请日：2009-09-18

    Applicant: INTERDIGITAL TECH CORP

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

    IPC: H04L27/26 ,  H04B7/08 ,  H04L5/02

    Abstract: A multiple-input multiple-output (MIMO) beamforming-based single carrier frequency division multiple access (SC-FDMA) system is disclosed. At the transmitter, a fast Fourier transform (FFT) is performed on transmission data to generate frequency domain data. The frequency domain transmit data is mapped to assigned subcarriers. An inverse fast Fourier transform (IFFT) is performed on the transmit data mapped to the assigned subcarriers to generate time domain transmit data. The time domain transmit data is transmitted via antennas. 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 U, D and V H 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.

    METHOD AND APPARATUS FOR IMPLEMENTING SPACE FREQUENCY BLOCK CODING
    88.
    发明专利
    METHOD AND APPARATUS FOR IMPLEMENTING SPACE FREQUENCY BLOCK CODING 未知

    公开(公告)号：SG155207A1

    公开(公告)日：2009-09-30

    申请号：SG2009053570

    申请日：2005-08-11

    Applicant: INTERDIGITAL TECH CORP

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

    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.

Patent Agency Ranking