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    Wireless communications systems and methods for virtual user based multiple user detection utilizing vector processor generated mapped cross-correlation matrices
    141.
    发明申请
    Wireless communications systems and methods for virtual user based multiple user detection utilizing vector processor generated mapped cross-correlation matrices 有权
    基于虚拟用户的多用户检测的无线通信系统和方法，利用向量处理器生成的映射互相关矩阵

    公开(公告)号：US20030091058A1

    公开(公告)日：2003-05-15

    申请号：US10099546

    申请日：2002-03-14

    Inventor： John H. Oates ,  Jonathan E. Greene

    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 processing 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”）。 第三处理单元产生作为R矩阵的函数的用户发送符号的估计。

    Wireless communication systems and methods for long-code communications for regenerative multiple user detection involving implicit waveform subtraction
    142.
    发明申请
    Wireless communication systems and methods for long-code communications for regenerative multiple user detection involving implicit waveform subtraction 有权
    用于长码通信的无线通信系统和方法，用于涉及隐式波形相减的再生多用户检测

    公开(公告)号：US20030002569A1

    公开(公告)日：2003-01-02

    申请号：US10099906

    申请日：2002-03-14

    Inventor： John H. Oates

    IPC: H04B001/69

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

    Abstract: The invention provides improved CDMA, WCDMA (UTMS) or other spread spectrum communication systems of the type that processes one or more spread-spectrum waveforms, each representative of a waveform received from a respective user (or other transmitting device). The improvement is characterized by a first logic element that generates a residual composite spread-spectrum waveform as a function of an arithmetic difference between a composite spread-spectrum waveform for all users (or other transmitters) and an estimated spread-spectrum waveform for each user. It is further characterized by one or more second logic elements that generate, for at least a selected user (or other transmitter), a refined spread-spectrum waveform as a function of a sum of the residual composite spread-spectrum waveform and the estimated spread-spectrum waveform for that user.

    Abstract translation: 本发明提供了改进的CDMA，WCDMA（UTMS）或处理一个或多个扩展频谱波形类型的其他扩频通信系统，每个扩频波形代表从相应用户（或其他发送设备）接收的波形。 该改进的特征在于第一逻辑元件，其产生作为所有用户（或其他发射机）的复合扩频波形与每个用户的估计扩频波形之间的算术差的函数的残差复合扩频波形 。 进一步的特征在于一个或多个第二逻辑元件，对于至少一个选定的用户（或其他发射机），生成作为残差复合扩频波形和估计扩频之和的函数的精细扩频波形 该用户的光谱波形。

    Shared correlator system and method for direct-sequence CDMA demodulation
    143.
    发明授权
    Shared correlator system and method for direct-sequence CDMA demodulation 有权
    用于直接序列CDMA解调的共享相关器系统和方法

    公开(公告)号：US06470000B1

    公开(公告)日：2002-10-22

    申请号：US09172378

    申请日：1998-10-14

    Applicant: Geoffrey F. Burns ,  Ravi K. Kolagotla

    Inventor： Geoffrey F. Burns ,  Ravi K. Kolagotla

    IPC: H04J1300

    CPC classification number: H04B1/7093 ,  G06F9/3001 ,  G06F9/30036 ,  H04B1/707 ,  H04B1/7075 ,  H04B2001/70706 ,  H04B2201/70711

    Abstract: A shared correlator system and method for a code division, multiple access (CDMA) receiver employs pipeline processing and information tags for sharing vector generation and correlation operations between processing units. A signal input to the CDMA receiver is provided as, for example, In-phase channel (I) and quadrature-phase channel (Q) sample vectors IREC and QREC. Sample vectors IREC and QREC are applied to the shared correlator of the CDMA receiver. Processing units request correlation operations by the shared correlator in which matched filter pseudo-noise (PN) vectors are correlated with the I and Q sample vectors IREC and QREC. The shared correlator schedules correlation operations requested by processing units, generates matched-filter, PN vectors with associated identification tags for the correlation operations, and provides correlation results for the correlation operations. The shared correlator renders a shared task correlation system, and includes pipeline processing and identification tags to increase correlation bandwidth and facilitate result distribution to shared tasks.

    Abstract translation: 用于码分多址（CDMA）接收机的共享相关器系统和方法采用流水线处理和信息标签，用于在处理单元之间共享向量生成和相关运算。 输入到CDMA接收机的信号被提供为例如同相信道（I）和正交相位信道（Q）采样矢量IREC和QREC。 样本矢量IREC和QREC被应用于CDMA接收机的共享相关器。 处理单元通过共享相关器请求相关操作，其中匹配滤波器伪噪声（PN）矢量与I和Q采样矢量IREC和QREC相关联。 共享相关器调度由处理单元请求的相关运算，产生具有相关识别标签的匹配滤波器PN矢量进行相关运算，并提供相关运算的相关结果。 共享相关器呈现共享任务相关系统，并且包括流水线处理和识别标签，以增加相关带宽并促进对共享任务的结果分配。

    Configurable all-digital coherent demodulator system for spread spectrum applicatons
    144.
    发明申请
    Configurable all-digital coherent demodulator system for spread spectrum applicatons 失效
    可配置的全数字相干解调器系统用于扩频应用

    公开(公告)号：US20010048724A1

    公开(公告)日：2001-12-06

    申请号：US09751783

    申请日：2000-12-29

    Inventor： Ravi Subramanian

    IPC: H03D003/00 ,  H03K009/06 ,  H04B001/10

    CPC classification number: H04B1/0003 ,  H04B1/0007 ,  H04B1/28 ,  H04B1/406 ,  H04B1/70735 ,  H04B1/7085 ,  H04B2201/70701 ,  H04B2201/70711 ,  H04L25/0204

    Abstract: A configurable all-digital coherent demodulator system for spread spectrum digital communications is disclosed herein. The demodulator system includes an extended and long code demodulator (ELCD) coupled to a traffic channel demodulator (TCD) and a parameter estimator (PE). The demodulator also includes a pilot assisted correction device (PACD) that is coupled to the PE and the TCD. The ELCD provides a code-demodulated signal to the TCD and the PE. In turn, the TCD provides a demodulated output data signal to the PE. The PACD corrects the phase error of the demodulated output data based on an error estimate that is fed forward from the PE. Accumulation operations in the ELCD, TCD, and PE are all programmable. Similarly, a phase delay in the PACD is also programmable to provide synchronization with the error estimate from the PE.

    Abstract translation: 本文公开了一种用于扩频数字通信的可配置全数字相干解调器系统。 解调器系统包括耦合到业务信道解调器（TCD）和参数估计器（PE）的扩展和长码解调器（ELCD）。 解调器还包括耦合到PE和TCD的导频辅助校正装置（PACD）。 ELCD向TCD和PE提供码解调信号。 反过来，TCD向PE提供解调的输出数据信号。 基于从PE馈送的误差估计，PACD校正解调输出数据的相位误差。 ELCD，TCD和PE中的累加操作都可编程。 类似地，PACD中的相位延迟也是可编程的，以提供与来自PE的误差估计的同步。

    Flexible sliding correlator for direct sequence spread spectrum systems
    145.
    发明申请
    Flexible sliding correlator for direct sequence spread spectrum systems 有权
    用于直接序列扩频系统的灵活滑动相关器

    公开(公告)号：US20010002919A1

    公开(公告)日：2001-06-07

    申请号：US09729524

    申请日：2000-12-04

    Inventor： Essam Sourour ,  Greg Bottomley ,  David Barrow ,  Rajaram Ramesh ,  Clarence V. Roberts

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

    CPC classification number: H04B1/7075 ,  H04B1/70752 ,  H04B1/70758 ,  H04B1/7093 ,  H04B1/7095 ,  H04B1/7115 ,  H04B2201/70711

    Abstract: A flexible sliding correlator for use in a spread spectrum receiver divides baseband signal samples into different groups, associates each group with a different section of a spreading code, and combines ones of the signal samples with corresponding values in the spreading code section. The groupings and spreading code sections can be changed during operation of the receiver to maximize performance of the receiver under different or changing conditions. In addition, the sample and spreading code value combinations can be further combined in different ways, and the further combinations can be changed during operation of the receiver. According to another aspect of the invention, the baseband signal can be sampled either uniformly or non-uniformly. The phase and frequency of the baseband sampling can be adjusted during operation of the receiver so that samples are taken very close to the optimum sampling position, at the peak of a chip waveform in the baseband signal.

    Abstract translation: 用于扩展频谱接收机的灵活的滑动相关器将基带信号样本分成不同的组，每个组与扩展码的不同部分相关联，并将信号样本中的一个与扩展码部分中的相应值组合。 可以在接收机的操作期间改变分组和扩展码部分，以在不同或变化的条件下最大化接收机的性能。 此外，样本和扩展码值组合可以以不同的方式进一步组合，并且可以在接收机的操作期间改变进一步的组合。 根据本发明的另一方面，可以均匀地或不均匀地采样基带信号。 基带采样的相位和频率可以在接收机工作期间进行调整，使样本在基带信号的芯片波形峰值处非常接近最佳采样位置。

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