公开(公告)号：US08804789B2

公开(公告)日：2014-08-12

申请号：US11179356

申请日：2005-07-11

Applicant: Ravi Subramanian

Inventor： Ravi Subramanian

IPC: H04L27/30

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。

公开(公告)号：US20120213251A1

公开(公告)日：2012-08-23

申请号：US13461104

申请日：2012-05-01

Applicant: Ravi SUBRAMANIAN

Inventor： Ravi SUBRAMANIAN

IPC: H04B1/707

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。

公开(公告)号：US20110274226A1

公开(公告)日：2011-11-10

申请号：US13144481

申请日：2009-12-21

Applicant: Toshiki Takeuchi

Inventor： Toshiki Takeuchi

IPC: H04W56/00

CPC classification number: H04B1/7095 ,  H04B1/70735 ,  H04B1/7075 ,  H04B1/7093 ,  H04B2201/70711

Abstract: In a synchronization processing circuit in a wireless communication system, a correlation operation unit is designed to have a parallel structure which can be restructured to improve flexibility in order to cope with various synchronization processings in a plurality of radio systems.The synchronization processing circuit in the wireless communication system comprises a plurality of correlation operation modules 31 through 3N that execute correlation operation, each of which correlation operation modules includes a plurality of correlators 60, a plurality of shift registers 50 for shifting a correlation code, an interface which transfers a shifted correlation code to an adjacent correlation operation unit for timing correlation processing, and a correlation code selection unit 40 which selects an externally and individually applied correlation code for code correlation processing and a correlation code transferred from an adjacent correlation operation unit as the correlation code.

Abstract translation: 在无线通信系统中的同步处理电路中，相关运算部被设计为具有可重构的并行结构，以提高灵活性，以应对多个无线电系统中的各种同步处理。 无线通信系统中的同步处理电路包括执行相关操作的多个相关运算模块31至3N，每个相关运算模块包括多个相关器60，用于移位相关码的多个移位寄存器50， 将相移代码转移到用于定时相关处理的相邻相关运算单元的接口，以及相关代码选择单元40，其选择用于代码相关处理的外部和单独应用的相关代码和从相邻相关运算单元传送的相关代码作为 相关代码。

公开(公告)号：US20100220706A1

公开(公告)日：2010-09-02

申请号：US12607916

申请日：2009-10-28

Applicant: Ghobad Heidari ,  Kuor-Hsin Chang ,  Paul L. Master ,  Eugene B. Hogenauer ,  Walter James Scheuermann

Inventor： Ghobad Heidari ,  Kuor-Hsin Chang ,  Paul L. Master ,  Eugene B. Hogenauer ,  Walter James Scheuermann

IPC: H04B7/216 ,  H04M3/00

CPC classification number: G06F15/7867 ,  H04B1/708 ,  H04B2201/70711

Abstract: A system acquisition module and corresponding method for facilitating PN code searching which has a PN sequence generator configurable to generate a plurality of PN sequences. The module and method also includes computational units configurable to correlate each received signal sample of a plurality of received signal samples with a corresponding PN sequence of the plurality of PN sequences, and further configurable to provide other hardware resources. A number of computational units from the plurality of computational units are selectively configured to correlate the received signal samples with the PN sequences—the number depending upon availability of the plurality of computational units from providing the other hardware resources. In another embodiment, a communication device having a system acquisition function is provided which includes the system acquisition module and a receiver configured to receive signals, where a plurality of configurable computational units are selectively configurable to implement the PN sequence generator.

Abstract translation: 一种用于促进PN码搜索的系统采集模块和相应方法，其具有可配置成产生多个PN序列的PN序列发生器。 该模块和方法还包括可配置为将多个接收信号样本中的每个接收信号样本与多个PN序列中的对应PN序列相关联的计算单元，并且还可配置为提供其他硬件资源。 来自多个计算单元的多个计算单元被选择性地配置为将接收到的信号采样与PN序列相关联 - 取决于多个计算单元的可用性从提供其他硬件资源的数量。 在另一个实施例中，提供了具有系统获取功能的通信设备，其包括系统获取模块和被配置为接收信号的接收器，其中多个可配置的计算单元被选择性地配置以实现PN序列发生器。

公开(公告)号：US20100067564A1

公开(公告)日：2010-03-18

申请号：US11989978

申请日：2005-08-05

Applicant: Benyuan Zhang

Inventor： Benyuan Zhang

IPC: H04B1/707

CPC classification number: H04B1/7113 ,  H04B1/7095 ,  H04B1/7117 ,  H04B2201/70711

Abstract: An apparatus for performing a multipath search including a plurality of time-multiplexed chip correlators, wherein each of the plurality of time-multiplexed chip correlators has a pipeline, and further wherein each of the plurality of time-multiplexed chip correlators has a accumulation time is described. A method is described for performing a multipath search including performing multipath search slot processing, determining if a current multipath searching slot is a last multipath searching slot, if the current multipath searching slot is not the last multipath searching slot, then repeating the performing step, if the current multipath searching slot is the last multipath searching slot, then initializing a multipath searching slot index, determining if an non-coherent accumulation has been completed if the accumulation has not been completed then repeating all steps and if the accumulation has been completed, then search results are sorted to locate energy peaks corresponding to multipath locations.

Abstract translation: 一种用于执行包括多个时分多路复用芯片相关器的多路径搜索的装置，其中所述多个时分多路复用芯片相关器中的每一个具有流水线，并且其中所述多个时分多路复用芯片相关器中的每一个具有累加时间 描述。 描述了一种用于执行多路径搜索的方法，包括执行多路径搜索时隙处理，确定当前多径搜索时隙是否是最后的多路径搜索时隙，如果当前多路径搜索时隙不是最后的多路径搜索时隙，则重复执行步骤， 如果当前的多路径搜索时隙是最后的多路径搜索时隙，则初始化多路径搜索时隙索引，如果积累尚未完成则确定是否已经完成了非相干累积，然后重复所有步骤，并且如果累积已经完成， 然后搜索结果被排序以定位与多路径位置相对应的能量峰值。

公开(公告)号：US20090323772A1

公开(公告)日：2009-12-31

申请号：US12492347

申请日：2009-06-26

Applicant: Kenichiro SANJI ,  Akira TAKAOKA ,  Hiromichi NAITO

Inventor： Kenichiro SANJI ,  Akira TAKAOKA ,  Hiromichi NAITO

IPC: H04B1/707

CPC classification number: H04B1/7093 ,  G07C2009/00793 ,  G07C2209/06 ,  H04B1/7077 ,  H04B1/7095 ,  H04B2201/70711 ,  H04B2201/70715

Abstract: In a wireless communication system, a portable device and an in-vehicle device wirelessly communicate with each other by a spread spectrum method. The in-vehicle device transmits a synchronization signal indicative of a reference period to the portable device. The in-vehicle device performs code acquisition for only a portion of a spread wireless signal received from the portable device. The portion has a starting point in a search period from a search start point to a search end point. The search start point is identified based on the reference period and a predetermined first correction time. The search end point is identified based on the reference period and a predetermined second correction time.

Abstract translation: 在无线通信系统中，便携式设备和车载设备通过扩频方法彼此无线通信。 车载设备向便携式设备发送指示参考周期的同步信号。 车载设备仅对从便携式设备接收的扩展无线信号的一部分进行代码获取。 该部分在搜索起始点到搜索结束点的搜索期间具有起始点。 基于参考周期和预定的第一校正时间来识别搜索起始点。 基于参考周期和预定的第二校正时间来识别搜索结束点。

公开(公告)号：US07515929B2

公开(公告)日：2009-04-07

申请号：US11116086

申请日：2005-04-27

Applicant: Balasubramanian Ramachandran ,  John E. Vasa ,  Tudor Lipan ,  Norman J Beamish

Inventor： Balasubramanian Ramachandran ,  John E. Vasa ,  Tudor Lipan ,  Norman J Beamish

IPC: H04M1/00

CPC classification number: H04B1/707 ,  H04B1/0067 ,  H04B2201/70711

Abstract: A receiver for a multi-mode wireless device is provided. The receiver has multiple analog RF front end modules, with each module supporting a different mode of operation. The receiver has a single digital backend module for generating a digital baseband signal. A controller selects one of the available RF modules to use, and the selected RF module provides an analog communication signal to the digital backend. Each available mode has an associated set of factors. When a particular mode is selected, the set of factors associated with the selected mode is provided to the digital backend. The digital backend uses these factors to adjust the processing characteristics of its components, such as its analog to digital converter, filters, and gain controller. In this way, the single digital backend is adaptable to the requirements of each of the available radio modes.

Abstract translation: 提供了一种用于多模式无线设备的接收机。 接收器具有多个模拟RF前端模块，每个模块支持不同的操作模式。 接收器具有用于产生数字基带信号的单个数字后端模块。 控制器选择可使用的RF模块之一，并且所选择的RF模块向数字后端提供模拟通信信号。 每个可用模式都有一组相关的因素。 当选择特定模式时，将与所选模式相关联的因子集提供给数字后端。 数字后端使用这些因素来调整其组件的处理特性，例如其模数转换器，滤波器和增益控制器。 以这种方式，单个数字后端可以适应每个可用无线电模式的要求。

公开(公告)号：US07499695B2

公开(公告)日：2009-03-03

申请号：US11317220

申请日：2005-12-22

Applicant: Ravi Subramanian

Inventor： Ravi Subramanian

IPC: H04B1/16

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。

公开(公告)号：US07453922B2

公开(公告)日：2008-11-18

申请号：US10099912

申请日：2002-03-14

Applicant: John H. Oates ,  Steven R. Imperiali ,  Alden J. Fuchs ,  Kathleen J. Jacques ,  Jonathan E. Greene ,  William J. Jenkins ,  Frank P. Lauginiger ,  David E. Majchrzak ,  Paul E. Cantrell ,  Mirza Cifric ,  Ian N. Dunn ,  Michael J. Vinskus

Inventor： John H. Oates ,  Steven R. Imperiali ,  Alden J. Fuchs ,  Kathleen J. Jacques ,  Jonathan E. Greene ,  William J. Jenkins ,  Frank P. Lauginiger ,  David E. Majchrzak ,  Paul E. Cantrell ,  Mirza Cifric ,  Ian N. Dunn ,  Michael J. Vinskus

IPC: H04B1/00

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, “gamma matrix”) 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, “R-matrix”) 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。

公开(公告)号：US20080130721A1

公开(公告)日：2008-06-05

申请号：US11946744

申请日：2007-11-28

Applicant: Anthony Craig DOLWIN

Inventor： Anthony Craig DOLWIN

IPC: H04B1/707

CPC classification number: H04B1/7113 ,  H04B1/709 ,  H04B1/7115 ,  H04B1/7117 ,  H04B2201/70707 ,  H04B2201/7071 ,  H04B2201/70711

Abstract: A spread spectrum receiver architecture comprising: a spread spectrum signal sampler; a sample delay stage, coupled to the spread spectrum sampler, to provide a set of spread spectrum samples having a plurality of different delays on a delayed sample bus; a plurality of scramble code generators to provide a plurality of scramble codes on a scramble code bus; and a plurality of correlators, each comprising a correlator module coupled to the delayed sample bus and comprising at least one spreading code generator coupled to the scramble code bus, and each said correlator having at least one correlation output.

Abstract translation: 一种扩频接收机架构，包括：扩频信号采样器; 耦合到扩频采样器的采样延迟级，以在延迟的采样总线上提供具有多个不同延迟的一组扩频样本; 多个扰频码发生器，用于在扰码总线上提供多个扰码; 以及多个相关器，每个相关器包括耦合到所述延迟采样总线的相关器模块，并且包括耦合到所述加扰码总线的至少一个扩展码发生器，并且每个所述相关器具有至少一个相关输出。