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    TRANSMISION MULTIRESOLUCION.
    71.
    发明专利
    TRANSMISION MULTIRESOLUCION. 未知

    公开(公告)号：ES2337033T3

    公开(公告)日：2010-04-20

    申请号：ES03009287

    申请日：1993-03-26

    Applicant: PANASONIC CORP

    Inventor： OSHIMA MITSUAKI

    IPC: H04J11/00 ,  H04L27/26 ,  G11B5/09 ,  H03M13/25 ,  H03M13/35 ,  H04B14/04 ,  H04H20/00 ,  H04H20/74 ,  H04J1/02 ,  H04J3/00 ,  H04L1/00 ,  H04L27/00 ,  H04L27/02 ,  H04L27/04 ,  H04L27/06 ,  H04L27/10 ,  H04L27/18 ,  H04L27/22 ,  H04L27/34 ,  H04L27/36 ,  H04L27/38 ,  H04N5/38 ,  H04N5/40 ,  H04N5/44 ,  H04N5/455 ,  H04N5/46 ,  H04N5/78 ,  H04N5/7826 ,  H04N5/92 ,  H04N7/015 ,  H04N7/04 ,  H04N7/045 ,  H04N7/06 ,  H04N7/08 ,  H04N7/081 ,  H04N7/20 ,  H04N7/24 ,  H04N11/04 ,  H04N11/24 ,  H04N21/2343 ,  H04N21/2383 ,  H04N21/438 ,  H04N21/4402 ,  H04N21/442 ,  H04N21/4425 ,  H04N21/462 ,  H04N21/63 ,  H04N21/647

    Abstract: Un teléfono para transmitir una señal de enlace ascendente a una estación base y recibir una primera señal de enlace descendente y una segunda señal de enlace descendente de la estación base, incluyendo: cuando la señal de enlace ascendente es transmitida desde el teléfono a la estación base: - un modulador (4) operable para modular un flujo de datos ascendente según QPSK para producir una señal modulada, - un transmisor (764, 22) operable para transmitir la señal modulada como la señal de enlace ascendente, cuando los enlaces descendentes primero y segundo son transmitidos desde la estación base al teléfono: - un receptor (22) operable para recibir la primera señal de enlace descendente y la segunda señal de enlace descendente, donde la primera señal de enlace descendente tiene información de un primer flujo de datos descendente y la segunda señal de enlace descendente tiene información de un segundo flujo de datos descendente, la primera señal de enlace descendente es modulada según QPSK y la segunda señal de enlace descendente es modulada según PSK de nivel n o QAM de nivel n, donde el primer flujo de datos descendente incluye información que representa el valor de n, y n es un entero e igual o mayor que 4, - un demodulador (45) operable para demodular la primera señal de enlace descendente para producir un primer flujo de datos descendente demodulado y para demodular la segunda señal de enlace descendente para producir un segundo flujo de datos descendente demodulado, donde el segundo flujo de datos descendente demodulado es producido según el valor de n, - un primer decodificador de código de corrección de errores operable para decodificar ECC el primer flujo de datos descendente demodulado para producir el primer flujo de datos descendente; y - un segundo decodificador de código de corrección de errores operable para decodificar ECC el segundo flujo de datos descendente demodulado para producir el segundo flujo de datos descendente, donde un esquema de codificación del primer decodificador ECC es diferente de un esquema de codificación del segundo decodificador ECC.

    COMMUNICATION SYSTEM
    75.
    发明专利
    COMMUNICATION SYSTEM 未知

    公开(公告)号：CA2652609C

    公开(公告)日：2009-10-06

    申请号：CA2652609

    申请日：1994-03-25

    Applicant: PANASONIC CORP

    Inventor： OSHIMA MITSUAKI

    IPC: H04L27/00 ,  H04B1/68 ,  H04L1/00 ,  H04L1/22 ,  H04L5/00 ,  H04L27/02 ,  H04L27/04 ,  H04L27/18 ,  H04L27/26 ,  H04L27/34 ,  H04L27/38 ,  H04N5/44 ,  H04N7/015 ,  H04N7/24 ,  H04N7/26 ,  H04N19/89

    Abstract: At the transmitter side, carrier waves are modulated according to an input signal for producing relevant signal points in a signal space diagram. The input signal is divided into, two, first and second, data streams. The signal points are divided into signal point groups to which data of the first data stream are assigned. Also, data of the second data stream are assigned to the signal points of each signal point group. A difference in the transmission error rate between first and second data streams is developed by shifting the signal points to other positions in the space diagram expressed at least in the polar coordinate system. At the receiver side, the first and/or second data streams can be reconstructed from a received signal. In TV broadcast service, a TV signal is divided by a transmitter into, low and high, frequency band components which are designated as a first and a second data streams respectively. Upon receiving the TV signal, a receiver can reproduce only the low frequency band component or both the low and high frequency band components, depending on its capability. Furthermore, a communication system based on an OFDM system is utilized for data transmission of a plurality of pubchannels, wherein the subchannels are differentiated by changing the length of a guardtime slot or a carrier wave interval of a symbol transmission time slot, or changing the transmission electric power of the carrier.

    COMMUNICATION SYSTEM
    78.
    发明专利
    COMMUNICATION SYSTEM 未知

    公开(公告)号：HK1103183A1

    公开(公告)日：2007-12-14

    申请号：HK07107518

    申请日：2007-07-13

    Applicant: PANASONIC CORP

    Inventor： OSHIMA MITSUAKI

    IPC: H04B1/68 ,  H04J20060101 ,  H04L20060101 ,  H04L1/00 ,  H04L1/22 ,  H04L5/00 ,  H04L27/02 ,  H04L27/04 ,  H04L27/18 ,  H04L27/26 ,  H04L27/34 ,  H04L27/38 ,  H04N5/44 ,  H04N7/015 ,  H04N7/24 ,  H04N7/26 ,  H04N19/89

    Abstract: In the transmitter side, data are divided into two or more groups, according to importance. In a three groups system, for example, the data streams are then mapped onto a multiresolution constellation (QAM or modified PSK) in the following way. The most important data determine the quadrant, the next most important determine which of four subsets is used in the quadrant, and the least important determine which point is used within that subset. This mapping system allows receivers of differing capabilities to detect as much data as they are able, or a single receiver to detect as much data as the channel quality allows. For example, a QPSK receiver could detect the most important data, a modified 16QAM receiver could detect the most important and second most important data, while a modified 64QAM receiver could receive all the data. Furthermore, in an OFDM system, multiresolution transmission is provided by using long guard times and/or wider channel spacing (equivalently, longer symbols) for the more important data. A system using n-level VSB is also described.

    COMMUNICATION SYSTEM
    79.
    发明专利
    COMMUNICATION SYSTEM 未知

    公开(公告)号：CA2652876A1

    公开(公告)日：1994-09-26

    申请号：CA2652876

    申请日：1994-03-25

    Applicant: PANASONIC CORP

    Inventor： OSHIMA MITSUAKI

    IPC: H04L27/00 ,  H04B1/68 ,  H04J11/00 ,  H04L1/00 ,  H04L1/22 ,  H04L5/00 ,  H04L27/02 ,  H04L27/04 ,  H04L27/18 ,  H04L27/26 ,  H04L27/34 ,  H04L27/38 ,  H04N5/44 ,  H04N7/015 ,  H04N7/24 ,  H04N7/26 ,  H04N19/89

    Abstract: At the transmitter side, carrier waves are modulated according to an input signal for producing relevant signal points in a signal space diagram. The input signal is divided into, two, first and second, data streams The signal points are divided into signal point groups to which data of the first data stream are assigned. Also, data of the second data stream are assigned to the signal points of each signal point group. A difference in the transmission error rate between first and second data streams is developed by shifting the signal points to other positions in the space diagram expressed at least in the polar coordinate system. At the receiver side, the first and/or second data streams can be reconstructed from a received signal. In TV broadcast service, a TV signal is divided by a transmitter into, low and high, frequency band components which are designated as a first and a second data streams respectively. Upon receiving the TV signal, a receiver can reproduce only the low frequency band component or both the low and high frequency band components, depending on its capability. Furthermore, a communication system based on an OFDM system is utilized for data transmission of a plurality of subchannels, wherein the subchannels are differentiated by changing the length of a guard time slot or a carrier wave interval of a symbol transmission time slot, or changing the transmission electric power of the carrier.

    COMMUNICATION SYSTEM
    80.
    发明专利
    COMMUNICATION SYSTEM 未知

    公开(公告)号：CA2652596A1

    公开(公告)日：1994-09-26

    申请号：CA2652596

    申请日：1994-03-25

    Applicant: PANASONIC CORP

    Inventor： OSHIMA MITSUAKI

    IPC: H04B1/68 ,  H03M13/27 ,  H04L1/00 ,  H04L1/22 ,  H04L5/00 ,  H04L27/00 ,  H04L27/02 ,  H04L27/04 ,  H04L27/18 ,  H04L27/26 ,  H04L27/34 ,  H04L27/38 ,  H04N5/44 ,  H04N7/015 ,  H04N7/24 ,  H04N7/26 ,  H04N19/89

    Abstract: At the transmitter side, carrier waves are modulated according to an input signal for producing relevant signal points in a signal space diagram. The input signal is divided into, two, first and second, data streams. The signal points are divided into signal point groups to which data of the first data stream are assigned. Also, data of the second data stream are assigned to the signal points of each signal point group. A difference in the transmission error rate between first and second data streams is developed by shifting the signal points to other positions in the space diagram expressed at least in the polar coordinate system. At the receiver side, the first and/or second data streams can be reconstructed from a received signal. In TV broadcast service, a TV signal is divided by a transmitter into, low and high, frequency band components which are designated as a first and a second data streams respectively. Upon receiving the TV signal, a receiver can reproduce only the low frequency band component or both the low and high frequency band components, depending on its capability. Furthermore, a communication system based on an OFDM system is utilized for data transmission of a plurality of subchannels, wherein the subchannels are differentiated by changing the length of a guardtime slot or a carrier wave interval of a symbol transmission time slot, or changing the transmission electric power of the carrier.

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