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    Wireless communications systems and methods for short-code multiple user detection
    41.
    发明申请
    Wireless communications systems and methods for short-code multiple user detection 有权
    用于短码多用户检测的无线通信系统和方法

    公开(公告)号：US20030099224A1

    公开(公告)日：2003-05-29

    申请号：US10099536

    申请日：2002-03-14

    Inventor： John H. Oates

    IPC: H04B007/216

    CPC classification number: H04B1/71052 ,  H04B1/707 ,  H04B1/7093 ,  H04B1/7105 ,  H04B1/71075 ,  H04B1/7115 ,  H04B2201/70707 ,  H04B2201/70711

    Abstract: The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One aspect of the invention provides a multiprocessor, multiuser detection system for detecting user transmitted symbols in CDMA short-code spectrum waveforms. A first processing element generates a matrix (hereinafter, nullgamma matrixnull) that represents a correlation between a short-code associated with one user and those associated with one or more other users. A set of second processing elements generates, e.g., from the gamma matrix, a matrix (hereinafter, nullR-matrixnull) that represents cross-correlations among user waveforms based on their amplitudes and time lags. A third procesing element produces estimates of the user transmitted symbols as a function of the R-matrix.

    Abstract translation: 本发明提供了用于多用户检测（MUD）处理的方法和装置，其具有例如在改进容量CDMA和其它无线基站中的应用。 本发明的一个方面提供一种用于在CDMA短码频谱波形中检测用户发送符号的多处理器，多用户检测系统。 第一处理元件生成表示与一个用户相关联的短码与与一个或多个其他用户相关联的短码之间的相关性的矩阵（以下称为“伽马矩阵”）。 一组第二处理元件例如从伽马矩阵生成基于它们的幅度和时间滞后的用户波形之间的互相关的矩阵（以下称为“R矩阵”）。 第三处理元素产生用户传输符号作为R矩阵的函数的估计。

    Programmable matched filter searcher for multiple pilot searching
    42.
    发明授权
    Programmable matched filter searcher for multiple pilot searching 有权
    可编程匹配滤波器搜索器，用于多个导频搜索

    公开(公告)号：US06480529B1

    公开(公告)日：2002-11-12

    申请号：US09468556

    申请日：1999-12-21

    Applicant: Gilbert C. Sih ,  Ian Fevrier ,  Inyup Kang ,  Christopher Patrick

    Inventor： Gilbert C. Sih ,  Ian Fevrier ,  Inyup Kang ,  Christopher Patrick

    IPC: H04B1500

    CPC classification number: H04B1/7093 ,  G06F17/15 ,  H04B2201/70711

    Abstract: A novel and improved method and apparatus for searching is described. This searcher combines the ability to search multiple offsets of single pilots, such as those found in the IS-95 system, with the ability to search multiple pilots, such as those found in a GPS location determination system. Both types of searching can be done in a single architecture combining the parallel computation features of a matched filter with the flexibility of allowing a variable number of coherent accumulations and a variable number of non-coherent accumulations to be performed at high speed for a wide range of search hypotheses in a resource efficient manner. This invention allows for parallel use of the matched filter structure in a time-sliced manner to search multiple windows. In addition, the searcher allows for optional independent Walsh decovering for each search window. The time-sharing approach allows for optional frequency searching of any offset.

    Abstract translation: 描述了一种新颖的，改进的搜索方法和装置。 该搜索者组合搜索诸如在IS-95系统中发现的单个导频的多个偏移的能力，具有搜索多个导频的能力，例如在GPS位置确定系统中发现的那些。 两种类型的搜索可以在单个架构中完成，该结构将匹配滤波器的并行计算特征与允许可变数量的相干累加的灵活性并且可变数量的非相干累加在高范围内进行宽范围 的资源有效的搜索假设。 本发明允许以时间分割的方式并行使用匹配的滤波器结构来搜索多个窗口。 此外，搜索器允许为每个搜索窗口选择独立的沃尔什解密。 时间分配方法允许任意偏移量的可选频率搜索。

    Scalable method for generating long codes using gold sequences
    44.
    发明授权
    Scalable method for generating long codes using gold sequences 失效
    使用黄金序列生成长码的可扩展方法

    公开(公告)号：US06324205B1

    公开(公告)日：2001-11-27

    申请号：US09566907

    申请日：2000-05-09

    Applicant: Mohit K. Prasad

    Inventor： Mohit K. Prasad

    IPC: H04B169

    CPC classification number: H04J13/10 ,  H04B1/707 ,  H04B2201/70711 ,  H04J13/0029

    Abstract: A scalable method and system for generating a 3X long code sequence for use in a CDMA communication system uses Gold sequences. A preferred pair of 1X long code sequences both running at 1.2288 Mchips/s are used to generate the 3X sequence. The 3X sequence so generated is a pseudo-random sequence with well defined auto-correlation and cross-correlation properties. Because the method is scalable it is easily scaled to generate other long code e.g. 6X, 9X, and 12X sequences.

    Abstract translation: 用于生成用于CDMA通信系统的3X长码序列的可扩展方法和系统使用Gold序列。 使用以1.2288 Mchips / s运行的优选的1X长码序列来生成3X序列。 如此生成的3X序列是具有良好定义的自相关和互相关属性的伪随机序列。 因为该方法是可扩展的，所以容易地缩放以产生其他长码，例如 6X，9X和12X序列。

    Configurable multimode despreader for spread spectrum applications
    45.
    发明申请
    Configurable multimode despreader for spread spectrum applications 失效
    可配置的多模解扩器用于扩频应用

    公开(公告)号：US20010040915A1

    公开(公告)日：2001-11-15

    申请号：US09751785

    申请日：2000-12-29

    Inventor： Ravi Subramanian

    IPC: H04K001/00 ,  H04B015/00 ,  H04L027/30

    CPC classification number: H04B1/707 ,  H04B2201/70711

    Abstract: A configurable multimode despreader for spread spectrum applications is disclosed herein. The despreader includes a plurality of data lines, at least one selective coupler coupled to the plurality of data lines, at least one multiplier coupled to the selective coupler, and a code input line coupled to the multiplier. The selective coupler selectively couples one of the plurality of data lines with the multiplier per any one of a plurality of despreading protocols. The multiplier then multiplies a desired input data type received from the selective coupler with a despreading code chip received from the code input line to produce an observation. The programmable multimode despreader supports variable code and data modulation schemes and variable spreading factors.

    Abstract translation: 本文公开了一种用于扩频应用的可配置多模解扩器。 解扩器包括多个数据线，耦合到多个数据线的至少一个选择耦合器，耦合到选择耦合器的至少一个乘法器，以及耦合到乘法器的代码输入线。 所述选择性耦合器根据多个解扩协议中的任何一个选择性地将所述多条数据线中的一条与乘法器相耦合。 然后，乘法器将从选择耦合器接收的期望输入数据类型与从代码输入行接收到的解扩码芯片相乘以产生观察。 可编程多模解扩器支持可变码和数据调制方案和可变扩频因子。

    Method and arrangement for interference mitigation
    50.
    发明授权
    Method and arrangement for interference mitigation 有权
    干扰减轻的方法和安排

    公开(公告)号：US09408222B2

    公开(公告)日：2016-08-02

    申请号：US14576553

    申请日：2014-12-19

    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

    Inventor： Bo Hagerman ,  Fredrik Gunnarsson

    IPC: H04B1/00 ,  H04B15/00 ,  H04W72/08 ,  H04B1/7103 ,  H04B1/38 ,  H04M1/00 ,  H04B1/7105

    CPC classification number: H04W72/082 ,  H04B1/7103 ,  H04B1/7105 ,  H04B2201/70711 ,  H04Q2213/13098

    Abstract: In a method of interference mitigation in a multi user detection capable radio base station in a communication system, which radio base station comprises a set of confined detection modules, at least one of which is capable of handling multiple user connections, first and at least a second subset of detection modules are formed from said set, wherein the second set comprises at least one interference mitigation capable detection module. Interference information from the first subset is communicated to the second subset, interference originating in user connections of the first subset are then mitigated from the user connections of the second subset. Subsequently, interference is mutually mitigated between the connections within the interference mitigation capable detection module.

    Abstract translation: 在通信系统中的具有多用户检测能力的无线电基站中的干扰减轻的方法中，该无线电基站包括一组限制检测模块，其中至少一个能够处理多个用户连接，首先和至少一个 检测模块的第二子集由所述集合形成，其中所述第二集合包括至少一个具有干扰抑制能力的检测模块。 来自第一子集的干扰信息被传送到第二子集，然后从第二子集的用户连接中减轻源自第一子集的用户连接的干扰。 随后，干扰减轻能力检测模块之间的连接之间相互减轻干扰。

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