中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

72 records (took 0.027 seconds)

    TECHNIQUE FOR IMPROVING OPEN LOOP POWER CONTROL IN SPREAD SPECTRUM TELECOMMUNICATIONS SYSTEMS
    1.
    发明申请
    TECHNIQUE FOR IMPROVING OPEN LOOP POWER CONTROL IN SPREAD SPECTRUM TELECOMMUNICATIONS SYSTEMS 审中-公开
    改善传播频谱电信系统中开环功率控制的技术

    公开(公告)号：WO02099996A8

    公开(公告)日：2004-08-19

    申请号：PCT/EP0205812

    申请日：2002-05-27

    Applicant: ERICSSON TELEFON AB L M ,  HELLMARK MARTIN ,  GUSTAFSSON KJELL ,  PALENIUS TORGNY ,  CARLSSON TORSTEN

    Inventor： HELLMARK MARTIN ,  GUSTAFSSON KJELL ,  PALENIUS TORGNY ,  CARLSSON TORSTEN

    IPC: H04B7/005

    CPC classification number: H04W52/362 ,  H04W52/10 ,  H04W52/16 ,  H04W52/228 ,  H04W52/367 ,  H04W52/50

    Abstract: A technique for improving open loop power control in spread spectrum telecommunications systems is disclosed. In a preferred embodiment, the technique is realized by transmitting at least one first access channel probe for a first message from a mobile station to a base station, wherein the transmission power level of each access channel probe in the at least one first access channel probe is increased until a base station acknowledgment is received for a specific access channel probe of the at least one first access channel probe at a first transmission power level. The first transmission power level is then stored at the mobile station. At least one second access channel probe for a second message is then transmitted from the mobile station to the base station, wherein the transmission power level of an initial access channel probe of the at least one second access channel probe for the second message is based upon the first transmission power level.

    Abstract translation: 公开了一种用于改进扩频电信系统中的开环功率控制的技术。 在优选实施例中，该技术通过将用于第一消息的至少一个第一接入信道探测从移动台发射到基站来实现，其中，所述至少一个第一接入信道探测中的每个接入信道探测的发射功率电平 增加，直到在第一传输功率电平下为所述至少一个第一接入信道探测器的特定接入信道探测器接收到基站确认。 然后将第一发射功率电平存储在移动台。 然后，用于第二消息的至少一个第二接入信道探测器从所述移动站发送到所述基站，其中所述用于所述第二消息的所述至少一个第二接入信道探测器的初始接入信道探测器的发射功率电平基于 第一传输功率电平。

    SEARCHING FOR SIGNALS IN A COMMUNICATIONS SYSTEM
    3.
    发明申请
    SEARCHING FOR SIGNALS IN A COMMUNICATIONS SYSTEM 审中-公开
    在通信系统中搜索信号

    公开(公告)号：WO0229994A8

    公开(公告)日：2004-02-26

    申请号：PCT/EP0111082

    申请日：2001-09-25

    Applicant: ERICSSON TELEFON AB L M ,  CARLSSON TORSTEN ,  GUSTAFSSON KJELL ,  ATARIUS ROOZBEH ,  ERIKSSON HAAKAN ,  OESTBERG CHRISTER ,  PALENIUS TORGNY

    Inventor： CARLSSON TORSTEN ,  GUSTAFSSON KJELL ,  ATARIUS ROOZBEH ,  ERIKSSON HAAKAN ,  OESTBERG CHRISTER ,  PALENIUS TORGNY

    IPC: H04B1/7075 ,  H04B1/712 ,  H04B1/707

    CPC classification number: H04B1/70758 ,  H04B1/70757 ,  H04B1/712

    Abstract: A method and system enable matched filters of a CDMA system to be simplified using a two stage search. A course stage and a fine stage jointly produce the locations(s) of received signal path-rays. In a first stage, an oversampled digital signal (240) is decimated, and the decimated signal (415) is applied to a matched filter (420) to eventually produce an approximate location (460). In a second stage, the oversampled signal (240) is shifted based on the determined approximate location (460) and then correlated to a generated code (440), and a more-exact location is selected from the outputs of the correlations (450). Alternatively, a shifted version of the generated code (440) is correlated to the oversampled signal (240), and the more-exact location is selected from the outputs of those correlations (450).

    Abstract translation: 一种方法和系统使得能够使用两级搜索来简化CDMA系统的匹配滤波器。 课程阶段和精细阶段共同产生接收的信号路径射线的位置。 在第一级中，抽取过采样的数字信号（240），并且抽取信号（415）被施加到匹配滤波器（420）以最终产生近似位置（46​​0）。 在第二阶段，基于所确定的近似位置（46​​0）将过采样信号（240）移位，然后与生成的代码（440）相关联，并且从相关（450）的输出中选择更精确的位置， 。 或者，生成代码（440）的移位版本与过采样信号（240）相关，并且从这些相关性（450）的输出中选择更精确的位置。

    AN ARRANGEMENT AND METHOD RELATING TO SIGNAL POWER AMPLIFICATION
    4.
    发明申请
    AN ARRANGEMENT AND METHOD RELATING TO SIGNAL POWER AMPLIFICATION 审中-公开
    关于信号功率放大的方案和方法

    公开(公告)号：WO9848510A3

    公开(公告)日：1999-01-21

    申请号：PCT/SE9800617

    申请日：1998-04-03

    Applicant: ERICSSON TELEFON AB L M

    Inventor： CARLSSON TORSTEN ,  HANSSON THOMAS

    IPC: H03G3/00 ,  H03G3/20 ,  H03F3/24

    CPC classification number: H03G3/004 ,  H03F1/0233 ,  H03F1/56

    Abstract: The present invention relates to arrangements and procedures in the power amplification of a signal. The power of an input signal is amplified and the power-amplified input signal forms an output signal whose power shall be in agreement with a reference level. The power of the signal is amplified with a power amplification circuit (5) that includes a power amplifier (1) and a control unit (2). The power amplification circuit (5) also includes means for measuring the power of the output signal. The control unit (2) generates supply voltages for the transistors (58, 64, 70) of the power amplifier (1) in relation to said reference level, so as to obtain a power amplifier (1) of good efficiency. The control unit (2) regulates the power of the output signal in relation to the reference level and in relation to the power of the output signal, so that the power of the output signal will be in general agreement with said reference level. The power amplifier (1) may also include controllable matching circuits that are controlled by controlled signals generated in relation to said reference level, so as to further improve the efficiency of the power amplifier (2).

    SEARCHING FOR SIGNALS IN A COMMUNICATIONS SYSTEM
    5.
    发明申请
    SEARCHING FOR SIGNALS IN A COMMUNICATIONS SYSTEM 审中-公开
    在通信系统中搜索信号

    公开(公告)号：WO0229994A2

    公开(公告)日：2002-04-11

    申请号：PCT/EP0111082

    申请日：2001-09-25

    Applicant: ERICSSON TELEFON AB L M ,  CARLSSON TORSTEN ,  GUSTAFSSON KJELL ,  ATARIUS ROOZBEH ,  ERIKSSON HAAKAN ,  OESTBERG CHRISTER ,  PALENIUS TORGNY

    Inventor： CARLSSON TORSTEN ,  GUSTAFSSON KJELL ,  ATARIUS ROOZBEH ,  ERIKSSON HAAKAN ,  OESTBERG CHRISTER ,  PALENIUS TORGNY

    IPC: H04B1/7075 ,  H04B1/712 ,  H04B1/707

    CPC classification number: H04B1/70758 ,  H04B1/70757 ,  H04B1/712

    Abstract: A method and system enable matched filters of a CDMA system to be simplified using a two stage search. A course stage and a fine stage jointly produce the locations(s) of received signal path-rays. In a first stage, an oversampled digital signal (240) is decimated, and the decimated signal (415) is applied to a matched filter (420) to eventually produce an approximate location (460). In a second stage, the oversampled signal (240) is shifted based on the determined approximate location (460) and then correlated to a generated code (440), and a more-exact location is selected from the outputs of the correlations (450). Alternatively, a shifted version of the generated code (440) is correlated to the oversampled signal (240), and the more-exact location is selected from the outputs of those correlations (450).

    Abstract translation: 一种方法和系统使得能够使用两阶段搜索来简化CDMA系统的匹配滤波器。 一个课程阶段和一个精细阶段共同产生接收到的信号路径射线的位置。 在第一阶段中，抽取过采样数字信号（240），并将抽取信号（415）应用于匹配滤波器（420）以最终产生近似位置（46​​0）。 在第二阶段中，基于所确定的近似位置（46​​0）将过采样信号（240）移位并且然后将其与生成的代码（440）相关，并且从相关（450）的输出中选择更精确的位置， 。 或者，生成的代码（440）的移位版本与过采样信号（240）相关，并且从那些相关（450）的输出中选择更精确的位置。

    APPARATUS IN A COMMUNICATION SYSTEM
    6.
    发明申请
    APPARATUS IN A COMMUNICATION SYSTEM 审中-公开
    通信系统中的装置

    公开(公告)号：WO9832235A3

    公开(公告)日：1998-09-11

    申请号：PCT/SE9800034

    申请日：1998-01-13

    Applicant: ERICSSON TELEFON AB L M

    Inventor： MANNERSTRAALE JACOB ,  ISBERG MARTIN ,  LINDQUIST BJOERN ,  CARLSSON TORSTEN ,  HAGBERG HANS ,  JAKOBSSON PETER ,  KUENKEL LARS PETER ,  GUSTAFSSON KJELL

    IPC: H04B1/26 ,  H03D3/00 ,  H04B1/40 ,  H03D7/16

    CPC classification number: H04B1/0057 ,  H03D3/007 ,  H04B1/005 ,  H04B1/406

    Abstract: The present invention relates to a receiver device comprising a receiver (104) adapted to receive radio signals in two frequency bands (FB1, FB2). The radio signals in one of the frequency bands (FB1) constitute communication signals for a radio system (AMPS, NMT) having a certain channel spacing, whereas the radio signals of the second frequency band (FB2) constitutes communication signals for a second radio system (PCS1900, DCS1800, GSM) having a second certain channel spacing. The receiver (104) comprises two inputs (108, 11) each intended for a radio system having different frequency bands and channel spacing. For radio signals occuring on one input (108), mixing is performed from the RF range directly to the baseband frequency range. For radio signals occuring on the second input (108) the mixing from the radio frequency range to the baseband frequency range is carried out through an intermediate frequency range. Further the receiver (104) comprises an output (112) intended to deliver baseband signals for both radio systems. The output (112) is connected to a baseband unit which is common to the radio systems. In the baseband unit, among other things, lowpass filtering, detection and neighbouring channel suppression are performed on the received radio signal that has been mixed down to the baseband frequency range.

    7.
    发明专利
    未知

    公开(公告)号：DE69833184T2

    公开(公告)日：2006-07-20

    申请号：DE69833184

    申请日：1998-01-13

    Applicant: ERICSSON TELEFON AB L M

    Inventor： MANNERSTRLE JACOB ,  ISBERG MARTIN ,  LINDQUIST BJOERN ,  CARLSSON TORSTEN ,  HAGBERG HANS ,  JAKOBSSON PETER ,  KUENKEL PETER ,  GUSTAFSSON KJELL

    IPC: H04B1/26 ,  H03D3/00 ,  H03D7/16 ,  H04B1/40

    Abstract: The present invention relates to a receiver device comprising a receiver (104) adapted to receive radio signals in two frequency bands (FB1, FB2). The radio signals in one of the frequency bands (FB1) constitute communication signals for a radio system (AMPS, NMT) having a certain channel spacing, whereas the radio signals of the second frequency band (FB2) constitutes communication signals for a second radio system (PCS1900, DCS1800, GSM) having a second certain channel spacing. The receiver (104) comprises two inputs (108, 11) each intended for a radio system having different frequency bands and channel spacing. For radio signals occurring on one input (108), mixing is performed from the RF range directly to the baseband frequency range. For radio signals occurring on the second input (108) the mixing from the radio frequency range to the baseband frequency range is carried out through an intermediate frequency range. Further the receiver (104) comprises an output (112) intended to deliver baseband signals for both radio systems. The output (112) is connected to a baseband unit which is common to the radio systems. In the baseband unit, among other things, lowpass filtering, detection and neighbouring channel suppression are performed on the received radio signal that has been mixed down to the baseband frequency range.

    10.
    发明专利
    未知

    公开(公告)号：DE69915342T2

    公开(公告)日：2005-01-13

    申请号：DE69915342

    申请日：1999-11-26

    Applicant: ERICSSON TELEFON AB L M

    Inventor： ATARIUS ROOZBEH ,  ERIKSSON H KAN ,  PALENIUS TORGNY ,  CARLSSON TORSTEN ,  GUSTAFSSON KJELL ,  OESTBERG CHRISTER

    IPC: H04B1/7093 ,  H04B1/7115 ,  H04B7/08 ,  H04B1/707

    Abstract: A searcher uses an input signal, and for example, a matched filter to generate a first set of candidate paths. A selector uses the input signal and the first set of candidate paths to generate a second set of paths. The second set of paths is used to configure the fingers of a RAKE receiver. According to one aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses M correlators to generate a set of M correlation values. The second stage uses the M correlation values to select N paths that are used to configure the N fingers of the RAKE receiver. According to another aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses a multiple of M correlators to track the M paths and generate a set of M estimates. The second stage uses the M estimates to select N paths that are used to configure the N fingers of the RAKE receiver. According to another aspect of the invention, the selector can generate new sets of N paths while the searcher is either active or inactive. The receiver can use a quality signal or a counter to notify the searcher and/or the selector to generate new sets of paths. The selector decreases the need to continuously run the matched filter. The receiver can re-configure the fingers without having to search for new paths. The receiver can also find paths that are uncorrelated and less susceptible to fading.

Patent Agency Ranking