中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

21 records (took 0.023 seconds)

    MULTICHANNEL TDM COMMUNICATION SYSTEM SLOT PHASE CORRECTION
    11.
    发明申请
    MULTICHANNEL TDM COMMUNICATION SYSTEM SLOT PHASE CORRECTION 审中-公开
    多通道TDM通信系统相位校正

    公开(公告)号：WO1993009617A1

    公开(公告)日：1993-05-13

    申请号：PCT/US1992008069

    申请日：1992-09-23

    Applicant: MOTOROLA, INC.

    Inventor： MOTOROLA, INC. ,  JASPER, Steven, Charles ,  BIRCHLER, Mark, A.

    IPC: H04J11/00

    CPC classification number: H04L27/2602 ,  H04L27/262

    Abstract: In a digital communication system in which pulse-shape filtered sync (202), pilot (203), and data symbols (201), arranged in successive time slots, modulate sub-channel carriers (309) via sub-channel mixers (308) to form sub-channel symbol streams for combination into a composite signal for transmission, deterministic portions of each time slot are rendered identical by determining phase difference of sub-channel carriers and rotating the phase of each sub-channel symbol stream by an amount equal to the phase difference, but with opposite sign.

    MULTICHANNEL TDM COMMUNICATION SYSTEM SLOT PHASE CORRECTION
    13.
    发明公开
    MULTICHANNEL TDM COMMUNICATION SYSTEM SLOT PHASE CORRECTION 失效
    相位校正用于环绕声通信系统的时隙。

    公开(公告)号：EP0565659A1

    公开(公告)日：1993-10-20

    申请号：EP92920507.0

    申请日：1992-09-23

    Applicant: MOTOROLA, INC.

    Inventor： JASPER, Steven, Charles ,  BIRCHLER, Mark, A.

    IPC: H04J11 ,  H04J1 ,  H04L27

    CPC classification number: H04L27/2602 ,  H04L27/262

    Abstract: Dans un système de communication numérique, dans lequel des symboles de synchronisation (202), pilotes (203) et de données (201), filtrés et en forme d'impulsions, et disposés dans des tranches de temps successifs, modulent des porteurs de sous-voie (309) par l'intermédiaire de mélangeurs de sous-voie (308) afin de constituer des suites de symboles de sous-voie devant être combinés en un signal composite pour la transmission, des parties déterminantes de chaque tranche de temps sont rendues identiques lorsque la différence de phase des porteurs de sous-voie est déterminée et que la phase de chaque suite de symboles de sous-voie subit une rotation d'un ordre équivalent à la différence de phase, mais précédé du signe opposé.

    MAXIMAL RATIO DIVERSITY COMBINING TECHNIQUE
    17.
    发明公开
    MAXIMAL RATIO DIVERSITY COMBINING TECHNIQUE 失效
    最大比例多样化技术组合

    公开(公告)号：EP0489880A1

    公开(公告)日：1992-06-17

    申请号：EP91911611.0

    申请日：1991-05-30

    Applicant: MOTOROLA, INC.

    Inventor： JASPER, Steven, C. ,  BIRCHLER, Mark, A.

    IPC: H04B7 ,  H04L1 ,  H04L27

    CPC classification number: H04L1/06 ,  H04B7/0865 ,  H04L1/04 ,  H04L27/38

    Abstract: Procédé d'utilisation de la réception en diversité pour contrer les effets sur un signal d'information transmis de l'évanouissement de canaux. On calcule des estimations du gain de canal complexe dans des voies de réception en diversité (601, 602, 603) à partir de symboles pilotes (201) introduits épisodiquement dans le train transmis (202) de symboles d'information. On totalise (605) des échantillons pondérés et à phase corrigée prélevés dans les voies de diversité avant le processus de décision (606). On additionne (604) les amplitudes élevées au carré des gains de canal des voies de diversité pour donner le réglage correct du seuil.

    Abstract translation: 一种使用分集接收来抵消信道衰落的传输信息信号的影响的方法。 复合信道增益估计是在分集接收信道（601,602,603）中从引入到发射信息符号序列（202）中的导频符号（201）中计算出来的。 在判决过程（606）之前，将从分集信道获取的加权和校正相位样本相加（605）。 将分集信道的信道增益的平方幅度相加（604）以给出阈值的正确设置。

    METHOD FOR IMPROVING COMMUNICATION COVERAGE IN MULTI-CELL COMMUNICATION SYSTEMS USING LOCATION INFORMATION
    18.
    发明授权
    METHOD FOR IMPROVING COMMUNICATION COVERAGE IN MULTI-CELL COMMUNICATION SYSTEMS USING LOCATION INFORMATION 有权
    一种提高覆盖面，MEHRZELLKOMMUNAKATIONSSYSTEMEN使用驻留位置信息

    公开(公告)号：EP1080593B1

    公开(公告)日：2006-06-07

    申请号：EP99925910.4

    申请日：1999-05-27

    Applicant: MOTOROLA, INC.

    Inventor： BIRCHLER, Mark, A. ,  MARTURANO, Lawrence, J. ,  MARSAN, Mark, J.

    IPC: H04Q7/20

    CPC classification number: H04W36/32 ,  H04W64/00

    Abstract: The present invention provides a method for improving the communication coverage in a multi-cell communication system (100) which employs neighbor cell lists. A cell site (114) provides a communication unit (128) within its cell (112) with communication and a neighbor cell list. The neighbor cell list (200) informs the communication unit of other cells which are possible hand-off targets. When the fixed network equipment (FNE) detects that a particular communication unit (128) has entered another cell and/or needs to hand-off its communication to another cell site but has been denied, the cell site (114) sends the communication unit the neighbor cell list related to the new cell. With a new neighbor cell list (300), the communication unit (128) can now attempt to maintain its communication by handing-off to cells unknown before. In this manner the effective communication coverage of the system is improved.

    METHOD FOR IMPROVING COMMUNICATION COVERAGE IN MULTI-CELL COMMUNICATION SYSTEMS USING LOCATION INFORMATION
    19.
    发明公开
    METHOD FOR IMPROVING COMMUNICATION COVERAGE IN MULTI-CELL COMMUNICATION SYSTEMS USING LOCATION INFORMATION 有权
    一种提高覆盖面，MEHRZELLKOMMUNAKATIONSSYSTEMEN使用驻留位置信息

    公开(公告)号：EP1080593A1

    公开(公告)日：2001-03-07

    申请号：EP99925910.4

    申请日：1999-05-27

    Applicant: MOTOROLA, INC.

    Inventor： BIRCHLER, Mark, A. ,  MARTURANO, Lawrence, J. ,  MARSAN, Mark, J.

    IPC: H04Q7/20

    CPC classification number: H04W36/32 ,  H04W64/00

    Abstract: The present invention provides a method for improving the communication coverage in a multi-cell communication system (100) which employs neighbor cell lists. A cell site (114) provides a communication unit (128) within its cell (112) with communication and a neighbor cell list. The neighbor cell list (200) informs the communication unit of other cells which are possible hand-off targets. When the fixed network equipment (FNE) detects that a particular communication unit (128) has entered another cell and/or needs to hand-off its communication to another cell site but has been denied, the cell site (114) sends the communication unit the neighbor cell list related to the new cell. With a new neighbor cell list (300), the communication unit (128) can now attempt to maintain its communication by handing-off to cells unknown before. In this manner the effective communication coverage of the system is improved.

    METHOD AND APPARATUS FOR COVARIANCE MATRIX ESTIMATION IN A WEIGHTED LEAST-SQUARES LOCATION SOLUTION
    20.
    发明公开
    METHOD AND APPARATUS FOR COVARIANCE MATRIX ESTIMATION IN A WEIGHTED LEAST-SQUARES LOCATION SOLUTION 失效
    方法和装置，通过加权SMALLEST最小二乘法IN A POSITIONSBERECHUNG估算协方差矩阵

    公开(公告)号：EP0895600A1

    公开(公告)日：1999-02-10

    申请号：EP97952533.0

    申请日：1997-12-19

    Applicant: MOTOROLA, INC.

    Inventor： BIRCHLER, Mark, A. ,  JONES, Debra, A. ,  OROS, Nicholas, C.

    IPC: G01S5 ,  G01C21 ,  G01S1 ,  G01S19 ,  H04B7 ,  H04W64

    CPC classification number: H04W64/00 ,  G01C21/20 ,  G01S1/045 ,  G01S5/06

    Abstract: Signals exchanged between a fixed infrastructure (110-116) and a mobile unit (160) give rise to M channel quality metrics. The channel quality metrics are mapped, via predetermined relationships (501-503), into M corresponding time of arrival variances, which in turn are used to derive M-1 time of arrival differential variances. A time of arrival differential weighting matrix including, in part, the time of arrival differential variances, is used to calculate a WLS solution, which solution is an estimate of a location of the mobile unit. This procedure may be implemented using an infrastructure-based location processor (130) operating in conjunction with the mobile unit, or may be performed by either the location processor or mobile unit alone.

Patent Agency Ranking