利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

238 条记录 (耗时 0.013 秒)

    METHOD AND APPARATUS FOR REDUCING SPREAD-SPECTRUM NOISE
    41.
    发明公开
    METHOD AND APPARATUS FOR REDUCING SPREAD-SPECTRUM NOISE 失效
    VERFAHREN UND SCHALTUNG ZUR REDUKTION VON SPREIZSPEKTRUMRAUSCHEN

    公开(公告)号：EP0970573A4

    公开(公告)日：2000-05-17

    申请号：EP98909717

    申请日：1998-03-23

    申请人： DSPC TECH LTD

    发明人： YELLIN DANIEL

    IPC分类号： H04B1/10 ,  H04B1/707 ,  H04B1/7107 ,  H04B15/00

    CPC分类号： H04B1/7107 ,  H04B1/7115 ,  H04B2201/70701

    摘要： Apparatus and a method for receiving spread-spectrum signals is provided. The method includes the steps of detecting a noisy user signal from a spread-spectrum signal including at least a first user signal (including data therein) and at least one pilot signal, and removing an interference effect of the pilot signal on the first user signal from the noisy user signal thereby to create a noise reduced user signal.

    摘要翻译： 提供了装置（10）和用于接收扩频信号的方法。 该方法包括以下步骤：从包括至少第一用户信号（其中包括数据）和至少一个导频信号的扩频信号中检测有噪用户信号，以及去除导频信号对第一用户信号的干扰效应 从有噪声的用户信号中产生噪声减少的用户信号（X'（n））。

    Direct-sequence code division multiple access receiver
    43.
    发明公开
    Direct-sequence code division multiple access receiver 失效
    Direktsequenzkodeverteilvielfachzugriffsempfänger

    公开(公告)号：EP0813314A3

    公开(公告)日：1998-11-18

    申请号：EP97303996

    申请日：1997-06-09

    申请人： NEC CORP

    发明人： SUZUKI HIDETO

    IPC分类号： H04B1/707 ,  H04B1/7107 ,  H04B7/005

    CPC分类号： H04B1/71072

    摘要： A direct-sequence CDMA receiver comprises power detectors for receiving a spread spectrum signal for detecting the power levels of user channels. A channel ranking circuit determines the ranks of the power levels. A framing circuit segments the received spread spectrum signal into data blocks and appending, to each of the data blocks, a header containing channel numbers identifying the user channels arranged according to the determined power level ranks. A plurality of serial interference cancellation stages are provided, each including the interference cancellers arranged in descending order of ranks. Each interference canceller detects one of the channel numbers of the header corresponding to the rank of the interference canceller, and removes one or more interfering signals from an associated user channel by using a despreading code that corresponds to the detected channel number.

    摘要翻译： 直接序列CDMA接收机包括用于接收用于检测用户信道的功率电平的扩频信号的功率检测器。 信道排序电路确定功率电平的等级。 成帧电路将接收到的扩频信号分段成数据块，并且将包含标识根据所确定的功率电平等级排列的用户信道的信道编号的标头附加到每个数据块。 提供了多个串行干扰消除级，每个级包括以秩的降序排列的干扰消除器。 每个干扰消除器检测与干扰消除器的秩相对应的头部的信道号之一，并且通过使用与检测到的信道号相对应的解扩码从相关用户信道中去除一个或多个干扰信号。

    EFFICIENT FREQUENCY DOMAIN (FD) MMSE EQUALIZATION WEIGHT UPDATES IN A MULTI-STAGE PARALLEL INTERFERENCE CANCELLATION RECEIVER
    50.
    发明公开
    EFFICIENT FREQUENCY DOMAIN (FD) MMSE EQUALIZATION WEIGHT UPDATES IN A MULTI-STAGE PARALLEL INTERFERENCE CANCELLATION RECEIVER 审中-公开

    公开(公告)号：EP3621208A1

    公开(公告)日：2020-03-11

    申请号：EP19196559.9

    申请日：2013-05-01

    申请人： GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

    发明人： WANG, Yi-Pin Eric

    IPC分类号： H04B1/7105 ,  H04B1/7107 ,  H04B7/08 ,  H04J11/00 ,  H04B7/0413

    摘要： A system (25) and method (45) to more efficiently compute updated Frequency Domain Minimum Mean Squared Error, FD MMSE, equalization weights in a multistage Parallel Interference Cancellation, PIC, receiver (62) after initial interference cancellation. The updated equalization weights (which are to be used during re-equalization) can be obtained using the old equalization weights already computed for initial interference cancellation. There is no need to invert an n R by n R matrix (where n R is the number of receive antennas) at each stage of the PIC receiver during each iteration of equalization and decoding operations, Rather, the matrix to be inverted to obtain updated equalization weights may be of the dimension n x n (where " n " equals the total number of transmission layers in a transmission scheme used in the wireless network). This significantly reduces complexity of determining updated equalization weights during FD MMSE equalization, thereby saving computational resources in a digital receiver performing such equalization.