中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

67 records (took 0.026 seconds)

    MULTI-PASS INTERFERENCE REDUCTION IN A GSM COMMUNICATION SYSTEM
    41.
    发明申请
    MULTI-PASS INTERFERENCE REDUCTION IN A GSM COMMUNICATION SYSTEM 审中-公开
    GSM通信系统中的多通道干扰减少

    公开(公告)号：WO2005041429A1

    公开(公告)日：2005-05-06

    申请号：PCT/US2004/030960

    申请日：2004-09-21

    Applicant: MOTOROLA INC. ,  STEWART, Kenneth, A. ,  BACHU, Raja, S. ,  BUCKLEY, Michael, E. ,  WILKINS, Clint, S.

    Inventor： STEWART, Kenneth, A. ,  BACHU, Raja, S. ,  BUCKLEY, Michael, E. ,  WILKINS, Clint, S.

    IPC: H04B1/10

    CPC classification number: H04L25/03038 ,  H04L2025/03407 ,  H04L2025/03477

    Abstract: An iterative method (400) and apparatus for a receiver for reducing interference in a desired signal in a GSM communication system uses a finite-impulse-response filter combined with alternate quadrature component output selection for alternate linear equalization are disclosed. The method includes inputting a burst of data of a received waveform including interference (402), training an alternate linear output filter with a midamble of known quadrature phase (404), providing an estimate of the desired signal by operating on the received waveform with the finite-impulse-response filter (406), generating Log likelihood ratio estimates for a plurality of bits in the burst of data (408), selecting bits from the burst of data base upon a predetermined condition (414), and re-training the alternate linear output filter to provide a second improved estimate of the desired signal.

    Abstract translation: 公开了一种用于减少GSM通信系统中期望信号的干扰的接收机的迭代方法（400）和装置，使用与用于交替线性均衡的交替正交分量输出选择组合的有限脉冲响应滤波器。 该方法包括输入包括干扰的接收波形的数据突发（402），训练具有已知正交相位的中间码（404）的交替的线性输出滤波器，通过对接收的波形进行操作来提供所需信号的估计， 有限脉冲响应滤波器（406），产生数据突发（408）中的多个比特的对数似然比估计，根据预定条件从数据库的突发中选择比特（414），并重新训练 交替的线性输出滤波器，以提供期望信号的第二改进估计。

    APPARATUS FOR PERFORMING FREQUENCY CONVERSION IN A COMMUNICATION SYSTEM
    42.
    发明申请
    APPARATUS FOR PERFORMING FREQUENCY CONVERSION IN A COMMUNICATION SYSTEM 审中-公开
    用于在通信系统中执行频率转换的装置

    公开(公告)号：WO1996001530A1

    公开(公告)日：1996-01-18

    申请号：PCT/US1995006468

    申请日：1995-05-26

    Applicant: MOTOROLA, INC.

    Inventor： MOTOROLA, INC. ,  STEWART, Kenneth, A. ,  LOVE, Robert, T.

    IPC: H04B01/69

    CPC classification number: H04B1/0021 ,  H03D3/007 ,  H03D2200/005 ,  H03D2200/0056 ,  H03D2200/006 ,  H03D2200/0068 ,  H03D2200/0072 ,  H03D2200/008 ,  H04B1/0003 ,  H04B1/0032 ,  H04B1/0046 ,  H04B1/26

    Abstract: An efficient apparatus for performing frequency conversion from a final IF frequency to a baseband frequency is described. A counter (401) generates two logical signals G1 (402) and G2 (403) which are passed to an exclusive-OR gate (404) and a multiplexer (406). When a control signal (411) is deasserted, multiplexer (406) passes signal G1 to I1 and signal G2 to I2; when control signal (411) is asserted, multiplexer (406) passes binary signal G1 to I2 (410) and signal G2 to I1 (407). Similarly, multiplexer (405) swaps its input real and imaginary samples when the output of exclusive-OR gate (404) is asserted; otherwise, it performs no operation on its input samples. Signals I1 (407) and I2 (410) are used to control arithmetic inverters (408) and (409) respectively. When the controlling signal for either inverter is asserted, the inventer performs arithmetic inversion, otherwise it performs no operation.

    Abstract translation: 描述用于从最终IF频率到基带频率执行频率转换的有效装置。 计数器（401）生成传递给异或门（404）和多路复用器（406）的两个逻辑信号G1（402）和G2（403）。 当控制信号（411）被断言时，多路复用器（406）将信号G1通过信号G1到信号G2到I2; 当控制信号（411）被断言时，多路复用器（406）将二进制信号G1传递到I2（410），并将信号G2传送到I1（407）。 类似地，当异或门（404）的输出被断言时，多路复用器（405）交换其输入的实数和虚数样本; 否则，它对其输入样本不执行任何操作。 信号I1（407）和I2（410）分别用于控制算术逆变器（408）和（409）。 当任何一个变频器的控制信号有效时，本发明人进行算术反转，否则不执行。

    METHOD AND APPARATUS FOR CONTROLLING ENCODING RATE IN A COMMUNICATION SYSTEM
    43.
    发明申请
    METHOD AND APPARATUS FOR CONTROLLING ENCODING RATE IN A COMMUNICATION SYSTEM 审中-公开
    用于控制通信系统中编码速率的方法和装置

    公开(公告)号：WO1995022857A1

    公开(公告)日：1995-08-24

    申请号：PCT/US1995000225

    申请日：1995-01-09

    Applicant: MOTOROLA INC.

    Inventor： MOTOROLA INC. ,  KOTZIN, Michael, D. ,  STEWART, Kenneth, A.

    IPC: H04B01/10

    CPC classification number: H04W16/14 ,  G10L19/00 ,  H04L1/0014 ,  H04L2001/0093 ,  H04W28/22 ,  H04W36/18

    Abstract: A code division multiple access (CDMA) communicating system reduces interference by reducing the encoding rate for selected mobiles. The system (400) primarily uses link related characteristics such as, inter alia, distance measurements, physical resource power, and mobile determined noise, to determine which mobiles require an encoding rate reduction. Once determined, the encoding rate of the determined mobiles is reduced, which in turn reduces self-interference and enhances system capacity.

    Abstract translation: 码分多址（CDMA）通信系统通过降低所选移动台的编码速率来减少干扰。 系统（400）主要使用诸如距离测量，物理资源功率和移动确定噪声之类的链路相关特性来确定哪个移动台需要编码速率降低。 一旦确定，所确定的移动台的编码速率就会降低，从而降低自干扰并提高系统容量。

    PREDICTIVE POWER CONTROL IN A DIGITAL DIVERSITY RECEIVER
    46.
    发明公开
    PREDICTIVE POWER CONTROL IN A DIGITAL DIVERSITY RECEIVER 审中-公开
    预后能力控制在数字多个接收器

    公开(公告)号：EP1797739A1

    公开(公告)日：2007-06-20

    申请号：EP05794019.9

    申请日：2005-08-30

    Applicant: MOTOROLA, INC.

    Inventor： STEWART, Kenneth, A. ,  KURBY, Christopher, N.

    IPC: H04Q7/38 ,  H04B7/005

    CPC classification number: H04W52/40 ,  H04B7/0885

    Abstract: A method (300) and an apparatus (202) for a digital diversity receiver having a first receiver branch (204) and a second receiver branch (206) for adjusting a receiver power control loop during a radio frame (100) of a known length are provide. The digital diversity receiver (202) receives a first signal (208) through the first receiver branch (204) during the radio frame (100), and receives a second signal (210) through the second receiver branch (206) during a portion of the radio frame (106, 110). The second signal (210) originates from a common original signal (212) as the first signal 208. The digital diversity receiver (202) evaluates (308) a receiver power control parameter for the first interval (106) based upon the first signal (208) and the second signal (210), and compensates (310) the receiver power control parameter with an offset value for the first interval (106). The compensated receiver power control parameter is then applied (312) to the receiver power control loop during the first interval.

    METHOD AND APPARATUS FOR JOINT DETECTION OF DATA IN A DIRECT SEQUENCE SPREAD SPECTRUM COMMUNICATIONS SYSTEM
    49.
    发明公开
    METHOD AND APPARATUS FOR JOINT DETECTION OF DATA IN A DIRECT SEQUENCE SPREAD SPECTRUM COMMUNICATIONS SYSTEM 审中-公开
    方法和设备数据在直接序列扩频新闻系统同时检测

    公开(公告)号：EP1068688A1

    公开(公告)日：2001-01-17

    申请号：EP98965960.2

    申请日：1998-11-13

    Applicant: MOTOROLA, INC.

    Inventor： STEWART, Kenneth, A. ,  QIAO, Yi

    IPC: H04B15/00 ,  H04K1/00 ,  H04L27/30

    CPC classification number: H04B1/7105 ,  H04B7/0854

    Abstract: Joint detection of data signals occurs in a code division, multiple access (CDMA) communication system as follows: a digital signal processor (315) first extracts a midamble portion of transmitted signal vectors and generates an estimate of the channel response corresponding to each user-antenna pair using a channel estimator (401). In the preferred embodiment, each user's transmission within the communication system comprises either the type-1 or type-2 burst with varying midamble and guard period durations. Next, a convolution processor (402) forms the convolution of the user signature sequence with the channel impulse response estimate associated with each user and each of the antennas (308-310). A detector (403) utilizes the set of vectors and creates a set of sub-system matrices and solves the sub-system matrices to extract symbol information from an individual remote unit's transmission. Finally, the detector (403) outputs symbol information for subsequent infrastructure processing.

Patent Agency Ranking