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    BLIND SPREADING FACTOR DETECTION FOR WCDMA
    1.
    发明公开
    BLIND SPREADING FACTOR DETECTION FOR WCDMA 有权
    WCDMA的盲扩频因子检测

    公开(公告)号：EP2504930A1

    公开(公告)日：2012-10-03

    申请号：EP10805320.8

    申请日：2010-11-22

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： WANG, Yi-Pin Eric

    IPC分类号： H04B1/707

    CPC分类号： H04B1/707 ,  H04B1/7115 ,  H04B2201/70705

    摘要： In a blind spreading factor detecting receiver, the amplitude of a desired signal term is decoupled from the spreading factor hypothesis for that signal. Furthermore, the amplitude of the desired signal and the variance of an associated impairment term are estimated, and the estimates used to form a spreading factor hypothesis. Additionally, in one or more embodiments, a suboptimal detector does not rely on estimates of the amplitude of the desired signal or variance of the impairment term. Rather, the detector relics on scaled values that are partially despread using an initial spreading factor not greater than the smallest possible spreading factor used by the signal of interest, and combined using combining weights from a Rake or G-Rake processor, wherein the scaling factor is chosen to yield a unity ratio between the signal amplitude and noise variance after scaling.

    摘要翻译： 在盲扩频因子检测接收机中，期望信号项的幅度与该信号的扩频因子假设分离。 此外，估计期望信号的幅度和相关减损项的方差，并将估计用于形成扩频因子假设。 另外，在一个或多个实施例中，次优检测器不依赖于期望信号的幅度或减损项的变化的估计。 相反，检测器在经缩放的值上残留缩放值，该缩放值使用不大于感兴趣信号使用的最小可能扩频因子的初始扩频因子部分解扩，并且使用来自Rake或G-Rake处理器的组合权重进行组合，其中缩放因子 被选择以在缩放之后产生信号幅度与噪声方差之间的单位比率。

    Variable rate transmission method, transmitter and receiver using the same
    2.
    发明授权
    Variable rate transmission method, transmitter and receiver using the same 失效
    可变速率传输方法，使用相同的发射机和接收机

    公开(公告)号：EP1545026B1

    公开(公告)日：2012-06-13

    申请号：EP05075561.0

    申请日：1996-02-23

    申请人： NTT DoCoMo, Inc.

    发明人： Okumura, Yukihiko c/o NTT DoCoMo, Inc. ,  Adachi, Fumiyuki c/o NTT DoCoMo, Inc. ,  Ohno, Koji c/o NTT DoCoMo, Inc. ,  Higashi, Akihiro c/o NTT DoCoMo, Inc.

    IPC分类号： H04B7/26

    CPC分类号： H04L1/0046 ,  H04B1/707 ,  H04B7/2628 ,  H04B2201/70703 ,  H04B2201/70705 ,  H04J3/14 ,  H04J3/1682 ,  H04L1/0002 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0013 ,  H04L1/0025 ,  H04L1/0032 ,  H04L1/0038 ,  H04L1/0039 ,  H04L1/0059 ,  H04L1/0061 ,  H04L1/0063 ,  H04L1/0071 ,  H04L1/0079 ,  H04L1/0086 ,  H04L1/08 ,  H04L7/048 ,  H04L2001/0098 ,  Y02D50/10

    摘要： A variable rate transmission method that can vary the transmission rate of data. A transmitting side supplies a transmitted data sequence to an error detecting encoder (105) and a frame memory (103). The frame memory (103) stores data of a variable length to be transmitted in one frame. The error detecting encoder (105) calculates an error detecting code (such as CRC code) for each frame of the transmitted data. A multiplexer (104) adds the calculated error detecting code ahead of the transmitted data to place it at the initial position of the frame, and sequentially outputs the data sequence frame by frame. A receiving side calculates an error detecting code of the data in each transmitted frame in the same manner as the transmitting side, and compares the calculated error detecting code with the error detecting code at the initial position of the frame. The end bit of the frame data is decided as a position at which the two error detecting codes coincide. This makes it possible to transmit variable length data without informing the receiving side of the data length in each frame. This is equivalent that the transmission rate can be varied freely. A variable rate transmission method that can vary the transmission rate of data. A transmitting side supplies a transmitted data sequence to an error detecting encoder (105) and a frame memory (103). The frame memory (103) stores data of a variable length to be transmitted in one frame. The error detecting encoder (105) calculates an error detecting code (such as CRC code) for each frame of the transmitted data. A multiplexer (104) adds the calculated error detecting code ahead of the transmitted data to place it at the initial position of the frame, and sequentially outputs the data sequence frame by frame. A receiving side calculates an error detecting code of the data in each transmitted frame in the same manner as the transmitting side, and compares the calculated error detecting code with the error detecting code at the initial position of the frame. The end bit of the frame data is decided as a position at which the two error detecting codes coincide. This makes it possible to transmit variable length data without informing the receiving side of the data length in each frame. This is equivalent that the transmission rate can be varied freely.

    Data detection for codes with non-uniform spreading factors
    3.
    发明授权
    Data detection for codes with non-uniform spreading factors 有权
    用非均匀扩频因子对码进行数据检测

    公开(公告)号：EP1529348B8

    公开(公告)日：2007-03-21

    申请号：EP03739284.2

    申请日：2003-06-23

    申请人： INTERDIGITAL TECHNOLOGY CORPORATION

    发明人： KIM, Younglok ,  PAN, Jung-Lin ,  ZEIRA, Ariela ,  REZNIK, Alexander

    IPC分类号： H04B1/69

    CPC分类号： H04J13/0044 ,  H04B1/707 ,  H04B1/71052 ,  H04B1/71055 ,  H04B2201/70703 ,  H04B2201/70705

    摘要： A plurality of communication signals is received. Each communication signal has an associated code. At least two of the communication signals has a different spreading factor. The associated codes have a scrambling code period. A total system response matrix has blocks. Each block has one dimension of a length M and another dimension of a length based on in part M and the spreading factor of each communication. M is based on the scrambling code period. Data of the received plurality of communication signals is received using the constructed system response matrix.

    摘要翻译： 接收到多个通信信号。 每个通信信号都有一个相关的代码。 至少两个通信信号具有不同的扩频因子。 相关的代码有一个扰码周期。 整个系统响应矩阵有块。 每个块具有一个长度为M的维度和一个长度为M的部分长度和每个通信的扩展因子。 M基于扰码周期。 使用构建的系统响应矩阵来接收所接收的多个通信信号的数据。

    REVERSE LINK CORRELATION FILTER IN MULTI RATE CDMA WIRELESS COMMUNICATION SYSTEMS
    4.
    发明授权
    REVERSE LINK CORRELATION FILTER IN MULTI RATE CDMA WIRELESS COMMUNICATION SYSTEMS 有权
    相关性过滤器回传信道与多个比特率的无线CDMA系统

    公开(公告)号：EP1269646B1

    公开(公告)日：2006-04-12

    申请号：EP01911096.4

    申请日：2001-02-23

    申请人： IPR Licensing Inc.

    发明人： ROUPHAEL, Antoine, J. ,  HOFFMANN, John, E. ,  NELSON, George, Rodney, Jr. ,  PATEL, Samir, K. ,  PROCTOR, James, A., Jr. ,  RILEY, Daniel L.

    IPC分类号： H04B1/707

    CPC分类号： H04B1/707 ,  H04B1/7105 ,  H04B1/712 ,  H04B2201/70703 ,  H04B2201/70705 ,  H04B2201/7071

    摘要： A single, common correlation filter (CF) core is provided in a wireless system using CDMA (code division multiple access). A plurality of channels with different data rates are provided in the wireless system. The channels provided in the wireless system include the access channel, the maintenance channel, and the traffic channel in which information (e.g., pilot or data symbols or both) is transmitted at the tier 1 (which is the basic despreading rate), tier 2 and tier 3 rates. The data rate for transmitting the information is programmable by an external programmable processor, e.g., a digital signal processor (DSP). A user-unique code, such as a PN (pseudo-random noise) code, is applied to the information being transmitted in the channels of the wireless system. Theinformation is modulated and transmitted in any one of the channels at any data rate. The transmitted information is correlated at the basic despreading rate (i.e., the tier 1 rate) in the correlation filter (CF) of the wireless system by time multiplexing delayed versions of the PN code (or orthogonal code, Walsh code) to the correlation filter core. The correlated information is then demultiplexed and demodulated. The demodulated information is summed at the proper integer multiple of the tier 1 rate to achieve the tier 2 and tier 3 rates. One or more signal components are selected (in terms of the received power, signal-to-noise ratio or multipath width) in a window or time period for optimal information recovery. The selecting step can also be implemented according to a preprogrammed time alignment. Furthermore, outputs from the demodulated information can be provided and combined for temporal diversity. Spatial diversity is achieved by providing a plurality of antennas, and a plurality of receivers at a location and providing a single, common correlation filter at each of the plurality of antennas of the receivers in the wireless system.

    CODE DIVISION MULTIPLE ACCESS RECEIVER
    6.
    发明公开
    CODE DIVISION MULTIPLE ACCESS RECEIVER 有权
    密码分配多址接收机

    公开(公告)号：EP1476953A1

    公开(公告)日：2004-11-17

    申请号：EP02801963.6

    申请日：2002-10-23

    申请人： IPWireless, Inc.

    发明人： JONES, Alan Edward ,  TREWREN, David

    IPC分类号： H04B1/707 ,  H04J11/00

    CPC分类号： H04J13/0044 ,  H04B1/707 ,  H04B2201/70705 ,  H04J13/20

    摘要： Processing of a received code division multiple access, CDMA, burst (405) when a spreading factor of the CDMA burst (405) has been changed from an allocated spreading factor (SFo) to a new spreading factor (SFn). The received burst (405) is processed with a CDMA detector (310), using the allocated spreading factor (SFo), to provide a CDMA detector output; the new spreading factor (SFn) of the burst is determined; and the CDMA detector output is decimated by a factor determined from the new spreading factor (SFn). The decimator may be a FIR decimator (315) and tap weights may be determined using the values of the new spreading factor (SFn) and the allocated spreading factor (SFo). Application in a Node B (150A) of a UMTS system (100), particularly in UTRA TDD mode, for processing received uplink communication is described.

    摘要翻译： 当CDMA突发（405）的扩频因子已从所分配的扩频因子（SFo）改变为新的扩频因子（SFn）时，处理所接收的码分多址CDMA突发（405）。 利用所分配的扩频因子（SF 0），用CDMA检测器（310）处理接收到的突发（405），以提供CDMA检测器输出; 确定突发的新扩频因子（SFn）; 并且CDMA检测器输出被从新扩频因子（SFn）确定的因子抽取。 抽取器可以是FIR抽取器（315），并且可以使用新的扩展因子（SFn）和分配的扩频因子（SFo）的值来确定抽头权重。 描述了在UMTS系统（100）的节点B（150A）中的应用，特别是在UTRA TDD模式中，用于处理接收到的上行链路通信。

    REVERSE LINK CORRELATION FILTER IN MULTI RATE CDMA WIRELESS COMMUNICATION SYSTEMS
    9.
    发明公开
    REVERSE LINK CORRELATION FILTER IN MULTI RATE CDMA WIRELESS COMMUNICATION SYSTEMS 有权
    相关性过滤器回传信道与多个比特率的无线CDMA系统

    公开(公告)号：EP1269646A2

    公开(公告)日：2003-01-02

    申请号：EP01911096.4

    申请日：2001-02-23

    申请人： Tantivy Communications, Inc.

    发明人： ROUPHAEL, Antoine, J. ,  HOFFMANN, John, E. ,  NELSON, George, Rodney, Jr. ,  PATEL, Samir, K. ,  PROCTOR, James, A., Jr. ,  RILEY, Daniel L.

    IPC分类号： H04B1/707

    CPC分类号： H04B1/707 ,  H04B1/7105 ,  H04B1/712 ,  H04B2201/70703 ,  H04B2201/70705 ,  H04B2201/7071

    摘要： A single, common correlation filter (CF) core is provided in a wireless system using CDMA (code division multiple access). A plurality of channels with different data rates are provided in the wireless system. The channels provided in the wireless system include the access channel, the maintenance channel, and the traffic channel in which information (e.g., pilot or data symbols or both) is transmitted at the tier 1 (which is the basic despreading rate), tier 2 and tier 3 rates. The data rate for transmitting the information is programmable by an external programmable processor, e.g., a digital signal processor (DSP). A user-unique code, such as a PN (pseudo-random noise) code, is applied to the information being transmitted in the channels of the wireless system. Theinformation is modulated and transmitted in any one of the channels at any data rate. The transmitted information is correlated at the basic despreading rate (i.e., the tier 1 rate) in the correlation filter (CF) of the wireless system by time multiplexing delayed versions of the PN code (or orthogonal code, Walsh code) to the correlation filter core. The correlated information is then demultiplexed and demodulated. The demodulated information is summed at the proper integer multiple of the tier 1 rate to achieve the tier 2 and tier 3 rates. One or more signal components are selected (in terms of the received power, signal-to-noise ratio or multipath width) in a window or time period for optimal information recovery. The selecting step can also be implemented according to a preprogrammed time alignment. Furthermore, outputs from the demodulated information can be provided and combined for temporal diversity. Spatial diversity is achieved by providing a plurality of antennas, and a plurality of receivers at a location and providing a single, common correlation filter at each of the plurality of antennas of the receivers in the wireless system.

    POST PROCESSING OF SPREADING CODES IN A MOBILE TELECOMMUNICATIONS SYSTEM
    10.
    发明公开
    POST PROCESSING OF SPREADING CODES IN A MOBILE TELECOMMUNICATIONS SYSTEM 审中-公开
    后期处理，一个移动通信系统的扩频码

    公开(公告)号：EP1260031A2

    公开(公告)日：2002-11-27

    申请号：EP01907925.0

    申请日：2001-02-28

    申请人： ROKE MANOR RESEARCH LIMITED

    发明人： JOHNSON, David

    IPC分类号： H04B1/707

    CPC分类号： H04B1/7105 ,  H04B2201/70705 ,  H04J13/0044

    摘要： In mobile telecommunications systems, such as UMTS, user communications can be transmitted in parallel within a single timeslot by spreading the different user communications amongst a plurality of orthogonal spreading codes. Each spreading code has a characteristic spreading factor. The communications transmitted in each timeslot are joint detected and de-spread into the original user communications by a joint detection algorithm. There is provided a method of post-processing the results of the joint detection algorithm when the spreading factors are unknown. The method of post-processing operates without the need to apply the joint detection algorithm more than once. Consequently, spreading codes with different spreading factors can be used in one timeslot.