Low-complexity, symbol-based, reduced substreams maximum likelihood decoder and method for a multiple-input, multiple-output communication system
    52.
    发明授权
    Low-complexity, symbol-based, reduced substreams maximum likelihood decoder and method for a multiple-input, multiple-output communication system 有权
    低复杂度,基于符号的减少子流最大似然解码器和多输入多输出通信系统的方法

    公开(公告)号:US07321644B2

    公开(公告)日:2008-01-22

    申请号:US10863455

    申请日:2004-06-08

    IPC分类号: H03D1/00

    摘要: A greater likelihood decoder, a method of deriving a reduced substreams maximum likelihood (RSML) decoded symbol vector and a multiple-input, multiple-output (MIMO) receiver incorporating the decoder or the method. In one embodiment, the decoder includes: (1) a suboptimal decoder that analyzes a received symbol vector to generate substream indicators and a decoded symbol vector estimate, (2) weakest substreams decision logic, coupled to the suboptimal decoder, that receives the substream indicators and selects weakest ones thereof and (3) subspace search logic, coupled to the suboptimal decoder and the weakest substreams decision logic, that further selects a reduced substreams maximum likelihood (RSML) decoded symbol vector from a subspace of decoded symbol vector candidates derived from the decoded symbol vector estimate and the weakest ones.

    摘要翻译: 更大似然解码器,导出减少的子流最大似然(RSML)解码符号向量的方法和包含解码器或方法的多输入多输出(MIMO)接收机的方法。 在一个实施例中,解码器包括:(1)分析接收的符号向量以产生子流指示符和解码的符号向量估计的次优解码器,(2)耦合到次优解码器的最弱子流决策逻辑,其接收子流指示符 并选择最弱的子码流决策逻辑,以及(3)子空间搜索逻辑,该子空间搜索逻辑耦合到次优解码器和最弱子流判决逻辑,其进一步从从解码符号向量候选导出的解码符号向量候选的子空间中选择减少的子流最大似然(RSML)解码符号向量 解码符号向量估计和最弱的符号向量估计。

    Versatile system for dual carrier transformation in orthogonal frequency division multiplexing
    53.
    发明申请
    Versatile system for dual carrier transformation in orthogonal frequency division multiplexing 有权
    用于正交频分复用的双载波变换的多功能系统

    公开(公告)号:US20050232137A1

    公开(公告)日:2005-10-20

    申请号:US11099317

    申请日:2005-04-05

    CPC分类号: H04L27/2602 H04B1/7176

    摘要: The present invention provides a versatile system for selectively spreading carrier data across multiple carrier paths within an Orthogonal Frequency Division Multiplexing (OFDM) system (200), particularly an ultra-wideband (UWB) system. The present invention provides a data input (202), which passes data to a randomizer (204). The data then passes to a convolutional code function (206), the output of which is punctured by puncturing function (208). An interleaver function (210) receives the punctured code data, and cooperatively operates with a mapper element (218) to prepare the coded data for pre-transmission conversion by an IFFT (220). The mapper element (218) comprises a dual carrier modulation function (216), which associates and transforms two punctured code data elements into a format for transmission on two separate signal tones.

    摘要翻译: 本发明提供了一种通用系统,用于在正交频分复用(OFDM)系统(200),特别是超宽带(UWB)系统内的多个载波路径上选择性地扩展载波数据。 本发明提供一种将数据传递给随机发生器(204)的数据输入(202)。 数据然后传递到卷积码功能(206),其输出被穿孔功能(208)打孔。 交织器功能(210)接收穿孔码数据,并与映射器元件(218)协作操作,以通过IFFT(220)准备用于预传输转换的编码数据。 映射器元件(218)包括双载波调制功能(216),其将两个穿孔码数据元素相关联并变换为用于在两个分离的信号音调上传输的格式。

    Reduced complexity transmit spatial waterpouring technique for multiple-input, multiple-output communication systems
    54.
    发明申请
    Reduced complexity transmit spatial waterpouring technique for multiple-input, multiple-output communication systems 审中-公开
    降低复杂度传输多输入,多输出通信系统的空间抽水技术

    公开(公告)号:US20050213686A1

    公开(公告)日:2005-09-29

    申请号:US10810764

    申请日:2004-03-26

    摘要: A waterpouring system and method for use with a multiple-input, multiple-output (MIMO) transmitter. In one embodiment, the waterpouring system includes an encoding decision subsystem that selects a constellation combination based on gains in channels of the MIMO transmitter, and a vector modulator subsystem, coupled to the encoding decision system, that modulates a fixed number of bits in a bitstream with the constellation combination to generate a symbol vector. The waterpouring system also includes a normalization and precoding subsystem, coupled to the vector modulator subsystem, that weights the symbol vector based on the gains to yield a weighted symbol vector and distributes the weighted symbol vector among the channels.

    摘要翻译: 一种用于多输入多输出(MIMO)发射机的浇水系统和方法。 在一个实施例中,排水系统包括编码决策子系统,其基于MIMO发射器的信道中的增益选择星座组合,以及耦合到编码决策系统的矢量调制器子系统,其调制位流中的固定位数 与星座组合生成符号向量。 流水系统还包括归一化和预编码子系统,耦合到矢量调制器子系统,其基于增益来对符号向量进行加权,以产生加权的符号向量并且在通道之间分配加权的符号向量。

    WIRELESS COMMUNICATIONS SYSTEM WITH SECONDARY SYNCHRONIZATION CODE BASED ON VALUES IN PRIMARY SYNCHRONIZATION CODE
    57.
    发明申请
    WIRELESS COMMUNICATIONS SYSTEM WITH SECONDARY SYNCHRONIZATION CODE BASED ON VALUES IN PRIMARY SYNCHRONIZATION CODE 有权
    具有基于同步同步码的值的二次同步代码的无线通信系统

    公开(公告)号:US20120154184A1

    公开(公告)日:2012-06-21

    申请号:US13403223

    申请日:2012-02-23

    IPC分类号: H03M7/00

    摘要: A wireless communication system. The system comprises transmitter circuitry (BST1), the transmitter circuitry comprising encoder circuitry (50) for transmitting a plurality of frames (FR). Each of the plurality of frames comprises a primary synchronization code (PCS) and a second synchronization code (SSC). The encoder circuitry comprises of circuitry (501) for providing the primary synchronization code in response to a first sequence (32). The encoder circuitry further comprises circuitry (502) for providing the secondary synchronization code in response to a second sequence (54) and a third sequence (56). The second sequence is selected from a plurality of sequences. Each of the plurality of sequences is orthogonal with respect to all other sequences. The third sequence is a subset of bits from the first sequence.

    摘要翻译: 无线通信系统。 该系统包括发射机电路(BST1),该发射机电路包括用于传输多个帧(FR)的编码器电路(50)。 多个帧中的每一个包括主同步码(PCS)和第二同步码(SSC)。 编码器电路包括用于响应于第一序列(32)提供主同步码的电路(501)。 编码器电路还包括用于响应于第二序列(54)和第三序列(56)提供辅助同步码的电路(502)。 第二序列从多个序列中选择。 多个序列中的每一个相对于所有其他序列是正交的。 第三个序列是来自第一个序列的比特的子集。

    Frequency-domain subchannel transmit antenna selection and power pouring for multi-antenna transmission
    58.
    发明授权
    Frequency-domain subchannel transmit antenna selection and power pouring for multi-antenna transmission 有权
    用于多天线传输的频域子信道发射天线选择和电力倾倒

    公开(公告)号:US08040986B2

    公开(公告)日:2011-10-18

    申请号:US10723215

    申请日:2003-11-26

    IPC分类号: H04B7/10 H04L1/02

    CPC分类号: H04W52/42

    摘要: A system comprises a wireless device that communicates across a spectrum having a plurality of sub-channels. The wireless device comprises a plurality of antennas through which the wireless device communicates with another wireless device, wherein each antenna communicates with the other wireless device via an associated communication pathway. The wireless device further comprises sub-channel power analysis logic coupled to the antennas and adapted to determine which communication pathway has the highest communication quality on a sub-channel by sub-channel basis. The wireless device still further comprises diversity selection logic coupled to the sub-channel power analysis logic and adapted to determine a weighting vector for an associated antenna based on the communication quality, wherein the weighting vector specifies a relative transmission power for each sub-channel for the associated antenna.

    摘要翻译: 系统包括在具有多个子信道的频谱上进行通信的无线设备。 无线设备包括多个天线,无线设备通过该天线与另一无线设备通信,其中每个天线经由相关联的通信路径与另一无线设备通信。 无线设备还包括耦合到天线的子信道功率分析逻辑,并且适于通过子信道来确定子信道上哪个通信路径具有最高通信质量。 无线设备还包括耦合到子信道功率分析逻辑的分集选择逻辑,并且适于基于通信质量来确定相关天线的加权向量,其中加权向量规定每个子信道的相对发射功率,用于 相关天线。

    LOW-COMPLEXITY TIGHTLY-COUPLED INTEGRATION FILTER FOR SENSOR-ASSISTED GNSS RECEIVER
    59.
    发明申请
    LOW-COMPLEXITY TIGHTLY-COUPLED INTEGRATION FILTER FOR SENSOR-ASSISTED GNSS RECEIVER 有权
    用于传感器辅助GNSS接收机的低复杂度轻耦合滤波器

    公开(公告)号:US20100079334A1

    公开(公告)日:2010-04-01

    申请号:US12568084

    申请日:2009-09-28

    IPC分类号: G01S19/47 G01P15/14

    摘要: Embodiments of the invention provide a blending filter based on extended Kalman filter (EKF), which optimally integrates the IMU navigation data with all other satellite measurements tightly-coupled integration filter. This blending filter can be easily implemented with minor modification to the position engine of stand-alone GNSS receiver. Provided is a low-complexity tightly-coupled integration filter for sensor-assisted global navigation satellite system (GNSS) receiver. The inertial measurement unit (IMU) contains inertial sensors such as accelerometer, magnetometer, and/or gyroscopes Embodiments also include method for pedestrian dead reckoning (PDR) data conversion for ease of GNSS/PDR integration. The PDR position data is converted to user velocity measured at the time instances where GNSS position/velocity estimates are available.

    摘要翻译: 本发明的实施例提供了一种基于扩展卡尔曼滤波器(EKF)的混合滤波器,其将IMU导航数据与所有其他卫星测量紧密耦合的积分滤波器进行最佳集成。 这种混合滤波器可以通过对独立GNSS接收机的位置引擎的微小修改来轻松实现。 提供了用于传感器辅助的全球导航卫星系统(GNSS)接收机的低复杂度紧耦合集成滤波器。 惯性测量单元(IMU)包含诸如加速度计,磁力计和/或陀螺仪的惯性传感器。实施例还包括用于容易进行GNSS / PDR集成的行人航位推算(PDR)数据转换的方法。 PDR位置数据被转换成在GNSS位置/速度估计可用的时间点测量的用户速度。

    STTD ENCODING FOR PCCPCH
    60.
    发明申请
    STTD ENCODING FOR PCCPCH 有权
    STCP编码PCCPCH

    公开(公告)号:US20090279634A1

    公开(公告)日:2009-11-12

    申请号:US12470241

    申请日:2009-05-21

    IPC分类号: H04B7/02

    CPC分类号: H04L1/06

    摘要: A circuit is designed with a measurement circuit (746) coupled to receive an input signal from at least one of a first antenna and a second antenna of a transmitter. The measurement circuit produces an output signal corresponding to a magnitude of the input signal. A control circuit (726) is coupled to receive the output signal, a first reference signal (.eta..sub.1) and a second reference signal (.eta..sub.2). The control circuit is arranged to produce a control signal in response to a comparison of the output signal, the first reference signal and the second reference signal.

    摘要翻译: 电路设计有测量电路(746),耦合到接收来自发射机的第一天线和第二天线中的至少一个的输入信号。 测量电路产生对应于输入信号幅度的输出信号。 控制电路(726)被耦合以接收输出信号,第一参考信号(...)和第二参考信号(...)。 控制电路被配置为响应于输出信号,第一参考信号和第二参考信号的比较而产生控制信号。