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146 records (took 0.024 seconds)

    91.
    发明专利
    未知

    公开(公告)号：BRPI0515638A

    公开(公告)日：2008-07-29

    申请号：BRPI0515638

    申请日：2005-09-07

    Applicant: INTERDIGITAL TECH CORP

    Inventor： PINHEIRO ANA LUCIA ,  CHANDRA ARTY ,  CHA INHYOK ,  MARINIER PAUL ,  ROY VINCENT

    IPC: H01Q3/26

    Abstract: A method for taking measurements with a smart antenna in a wireless communication system having a plurality of STAs begins by sending a measurement request from a first STA to a second STA. At least two measurement packets are transmitted from the second STA to the first STA. Each measurement packet is received at the first STA using a different antenna beam. The first STA performs measurements on each measurement packet and selects an antenna beam direction based on the measurement results.

    92.
    发明专利
    未知

    公开(公告)号：NO20075457L

    公开(公告)日：2007-10-29

    申请号：NO20075457

    申请日：2007-10-29

    Applicant: INTERDIGITAL TECH CORP

    Inventor： ZEIRA ELDAD ,  CHA INHYOK ,  BALDWIN KEITH RICHARD

    IPC: H04B7/00 ,  H04J99/00

    Abstract: The method involves selecting an antenna mapping at a transmitting wireless transmit/receive unit (Tx WTRU) from a candidate set of currently available antenna mappings. Another antenna mapping is selected at a receiving (Rx WTRU) from the candidate set of currently available antenna mappings. A determination is made whether the currently selected antenna mappings are calibrated at the Tx WTRU. The selected antenna mappings are calibrated if it is determined that the selected antenna mappings are not calibrated. An independent claim is also included for a wireless communication system.

    METODO Y APARATO PARA LA SELECCION DE ANTENA DE MAPEO EN REDES INALAMBRICAS EN MIMO -OFDM
    94.
    发明专利
    METODO Y APARATO PARA LA SELECCION DE ANTENA DE MAPEO EN REDES INALAMBRICAS EN MIMO -OFDM 未知

    公开(公告)号：AR053842A1

    公开(公告)日：2007-05-23

    申请号：ARP060101384

    申请日：2006-04-07

    Applicant: INTERDIGITAL TECH CORP

    Inventor： CHA INHYOK ,  ZEIRA ELDAD ,  BALDWIN KEITH RICHARD

    IPC: H01Q3/26 ,  H04B7/06 ,  H04B7/08

    Abstract: Un método y aparato para seleccionar un mapeo de antena en redes de comunicacion inalámbrica habilitadas para entrada multiple-salida multiple (MIMO). Un conjunto candidato de mapeos de antena disponibles en forma corriente se determina en base a las condiciones de canal medidas a largo plazo. Un mapeo de antena es seleccionad del conjunto candidato, y el mapeo es calibrado con un mapeo de antena seleccionado de una unidad inalámbrica de transmision/recepcion (WTRU). Cuando los mapeos seleccionados son calibrados, comienza la transmision de datos de paquete. En una forma de realizacion alternativa, se utiliza una trama de entrenamiento de calibracion (CTF) para calibrar multiples mapeos de antena en forma simultánea o secuencial. Se divulgan, además, formatos de trama de capa de control de acceso al medio y de capa física para implementar una seleccion de mapeo de antena, de acuerdo con la presente.

    IMPLEMENTACION DE ANTENA INTELIGENTE EN UNA RED INALAMBRICA DE AREA LOCAL.
    95.
    发明专利
    IMPLEMENTACION DE ANTENA INTELIGENTE EN UNA RED INALAMBRICA DE AREA LOCAL. 未知

    公开(公告)号：AR050873A1

    公开(公告)日：2006-11-29

    申请号：ARP050103791

    申请日：2005-09-12

    Applicant: INTERDIGITAL TECH CORP

    Inventor： MARINIER PAUL ,  CHANDRA ARTY ,  CHA INHYOK ,  ROY VINCENT

    IPC: H04B1/38

    Abstract: Un método para implementar una antena inteligente para establecer una asociacion entre uno estacion (STA) y un punto de acceso (AP) en una red inalámbrica de área local comienza cuando el AP transmite una trama de baliza sobre un haz de antena. La trama de baliza es recibida en la STA, que mide la calidad de senal de la trama de baliza. El AP conmuta a un haz de antena diferente y repite el método hasta que la trama de baliza ha sido transmitida sobre todos los haces de antena. La STA se asocia con el AP que transmite la trama de baliza con la calidad de senal más alta sobre uno de sus haces de antena. Puede utilizarse un método similar donde la STA envía una trama de pedido de prueba al AP, que luego responde con tramas de respuesta de prueba enviadas sobre multiples haces de antena.

    Method and apparatus for antenna mapping selection in MIMO-OFDM wireless networks
    98.
    发明专利
    Method and apparatus for antenna mapping selection in MIMO-OFDM wireless networks 未知

    公开(公告)号：AU2010200245B8

    公开(公告)日：2013-09-26

    申请号：AU2010200245

    申请日：2010-01-22

    Applicant: INTERDIGITAL TECH CORP

    Inventor： CHA INHYOK ,  ZEIRA ELDAD ,  BALDWIN KEITH RICHARD

    IPC: H04B1/00 ,  H04J99/00

    Abstract: A method and apparatus for selecting an antenna mapping in multiple-in /multiple-out (MIMO) enabled wireless communication networks. A candidate set of currently available antenna mappings is determined based upon measure long term channel conditions. An antenna mapping is selected from the candidate set, and the mapping is calibrated with a selected antenna mapping of a receiving wireless transmit/receive unit (WTRU). When the selected mappings are calibrated, packet data transmission begins. In an alternative embodiment, a calibration training frame (CTF) is used to calibrate multiple antenna mappings simultaneously or sequentially. Also disclosed are physical layer and medium access control layer frame formats for implementing antenna mapping selection according to the invention. SELECT ANTENNA MAPPING 210 FROM CANDIDATE SET 230 NO0 SELECTED ANTENNA 230 MAPPING CALIBRATED CALIBRATE SELECTED ANTENNA YES MAPPING (REQUEST CALIBRATION, ESTIMATE CHANNEL, CALCULATE CALBRATION MATRI) 240 RECElVING. WVTRU YES )CHANGED ANTENNA 2 o 4? FlG.2 B EGIN DATA PACKET TRANSMISSION 310 316A 326A 32 0 312Ad 322A RF C~lN EAM EAM RF CHAIN 3125 SLEETOR . SELECTOR f322B RF CHAIN RF CHAIN , 31 4 --'- '324 CALIBRATION 316N 326M CALIBRATION

    Method and apparatus for antenna mapping selection in MIMO-OFDM wireless networks
    99.
    发明专利
    Method and apparatus for antenna mapping selection in MIMO-OFDM wireless networks 未知

    公开(公告)号：AU2010200245A8

    公开(公告)日：2013-09-26

    申请号：AU2010200245

    申请日：2010-01-22

    Applicant: INTERDIGITAL TECH CORP

    Inventor： CHA INHYOK ,  ZEIRA ELDAD ,  BALDWIN KEITH RICHARD

    IPC: H04B1/00 ,  H04J99/00

    Abstract: A method and apparatus for selecting an antenna mapping in multiple-in /multiple-out (MIMO) enabled wireless communication networks. A candidate set of currently available antenna mappings is determined based upon measure long term channel conditions. An antenna mapping is selected from the candidate set, and the mapping is calibrated with a selected antenna mapping of a receiving wireless transmit/receive unit (WTRU). When the selected mappings are calibrated, packet data transmission begins. In an alternative embodiment, a calibration training frame (CTF) is used to calibrate multiple antenna mappings simultaneously or sequentially. Also disclosed are physical layer and medium access control layer frame formats for implementing antenna mapping selection according to the invention. SELECT ANTENNA MAPPING 210 FROM CANDIDATE SET 230 NO0 SELECTED ANTENNA 230 MAPPING CALIBRATED CALIBRATE SELECTED ANTENNA YES MAPPING (REQUEST CALIBRATION, ESTIMATE CHANNEL, CALCULATE CALBRATION MATRI) 240 RECElVING. WVTRU YES )CHANGED ANTENNA 2 o 4? FlG.2 B EGIN DATA PACKET TRANSMISSION 310 316A 326A 32 0 312Ad 322A RF C~lN EAM EAM RF CHAIN 3125 SLEETOR . SELECTOR f322B RF CHAIN RF CHAIN , 31 4 --'- '324 CALIBRATION 316N 326M CALIBRATION

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