Versatile System for Dual Carrier Transformation in Orthogonal Frequency Division Multiplexing
    51.
    发明申请
    Versatile System for Dual Carrier Transformation in Orthogonal Frequency Division Multiplexing 有权
    在正交频分复用中双载波变换的多功能系统

    公开(公告)号:US20100111138A1

    公开(公告)日:2010-05-06

    申请号:US12685404

    申请日:2010-01-11

    IPC分类号: H04B1/69

    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, particularly an ultra-wideband (UWB) system. The present invention provides a data input, which passes data to a randomizer. The data then passes to a convolutional code function, the output of which is punctured by puncturing function. An interleaver function receives the punctured code data, and cooperatively operates with a mapper element to prepare the coded data for pre-transmission conversion by an IFFT. The mapper element comprises a dual carrier modulation function, which associates and transforms two punctured code data elements into a format for transmission on two separate signal tones.

    摘要翻译: 本发明提供了一种用于在正交频分复用(OFDM)系统,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的通用系统。 本发明提供一种将数据传递给随机发生器的数据输入。 数据然后传递到卷积码功能,其输出由穿孔功能打孔。 交织器功能接收穿孔码数据,并与映射器元件协作操作以通过IFFT准备用于预传输转换的编码数据。 映射器元件包括双载波调制功能,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。

    Scalable time-orthogonal preamble supplement generator, method of generating and multiple-input, multiple-output communication system employing the generator and method
    52.
    发明授权
    Scalable time-orthogonal preamble supplement generator, method of generating and multiple-input, multiple-output communication system employing the generator and method 有权
    可扩展时间正交前导码补充生成器,生成和多输入方法,采用发生器和方法的多输出通信系统

    公开(公告)号:US07324602B2

    公开(公告)日:2008-01-29

    申请号:US10886480

    申请日:2004-07-07

    IPC分类号: H04L1/02

    摘要: The present invention provides a time-orthogonal preamble supplement generator for use with a multiple-input, multiple-output (MIMO) transmitter employing N transmit antennas, where N is at least two. In one embodiment, the time-orthogonal preamble supplement generator includes an initial preamble supplement encoder configured to provide a preamble supplement to each of the N transmit antennas during an initial time interval. The time-orthogonal preamble supplement generator also includes a subsequent preamble supplement encoder coupled to the initial preamble supplement encoder and configured to provide the preamble supplement or a negation thereof to the N transmit antennas during (N−1) subsequent time intervals.

    摘要翻译: 本发明提供了一种与采用N个发射天线的多输入多输出(MIMO)发射机一起使用的时间正交前导码补充生成器,其中N是至少两个。 在一个实施例中,时间正交前导码补充生成器包括初始前导码补充编码器,其被配置为在初始时间间隔期间向N个发射天线中的每一个提供前导码补充。 时间正交前导码补充生成器还包括耦合到初始前导码补充编码器并被配置为在(N-1)个后续时间间隔期间向N个发送天线提供前导补充或否定的后续前导码补充编码器。

    Low-complexity hierarchical decoding for communications systems using multidimensional QAM signaling
    53.
    发明授权
    Low-complexity hierarchical decoding for communications systems using multidimensional QAM signaling 有权
    使用多维QAM信令的通信系统的低复杂度分层解码

    公开(公告)号:US07280622B2

    公开(公告)日:2007-10-09

    申请号:US10644545

    申请日:2003-08-20

    IPC分类号: H03D1/00 H04L27/06

    CPC分类号: H04L1/0054 H04L1/06

    摘要: A reduced search space minimum distance decoding method provides average probability of error performance close to optimal MAP decoding. The decoding algorithm provides dramatic complexity reductions compared with MAP decoding. A a sub-optimal decoder receives a collection of signal vectors y1 . . . yk, with k denoting a positive integer and generates an estimated transmitted multidimensional symbol {tilde over (S)}. The estimated transmitted multidimensional symbol {tilde over (S)} is decoded using hierarchical subset decoding a subset is determined therefrom. A reduced search space V is generated and minimum distance decoding is used to decode the received symbol vectors y1 . . . yk in the reduced search space V. one or more of the following: an estimated multidimensional symbol {tilde over (S)}, soft bit information, or hard bit information are cienerated therefrom.

    摘要翻译: 减少的搜索空间最小距离解码方法提供误差性能的接近于最佳MAP解码的平均概率。 与MAP解码相比,解码算法提供了显着的复杂性降低。 子优化解码器接收信号矢量y 1的集合。 。 。 其中k表示正整数,并且生成估计的传输多维符号S.使用分层子集解码对估计的传输多维符号S进行解码,从其确定子集。 生成减小的搜索空间V,并且使用最小距离解码来对接收的符号向量y 1< 1> 1进行解码。 。 。 在缩小搜索空间V中的一个或多个。以下中的一个或多个:由其估计的多维符号S,软比特信息或硬比特信息。

    Channel norm-based ordering and whitened decoding for MIMO communication systems
    54.
    发明授权
    Channel norm-based ordering and whitened decoding for MIMO communication systems 有权
    用于MIMO通信系统的基于频道规范的排序和白化解码

    公开(公告)号:US07257170B2

    公开(公告)日:2007-08-14

    申请号:US10644489

    申请日:2003-08-20

    IPC分类号: H03D1/00 H04L27/06

    摘要: A channel norm-based ordering and whitened decoding technique (lower complexity iterative decoder) for MIMO communication systems performs approximately the same level of performance as an iterative minimum mean squared error decoder. Decoding a signal vector comprises receiving a signal vector yk, multiplying the received signal vector yk by a conjugate transpose of a channel matrix H*. A column vector zk is generated. The entries of the column vector zk are reordered and an estimated channel matrix {tilde over (H)} is generated. The estimated channel matrix {tilde over (H)} decomposed using a Cholesky decomposition and generating a triangular matrix L. Triangular matrix L is solved backwards and a signal vector {tilde over (s)}k estimated. An estimate of the transmitted symbol vector Ŝk is generated.

    摘要翻译: 用于MIMO通信系统的基于信道规范的排序和白化解码技术(较低复杂度迭代解码器)执行与迭代最小均方误差解码器大致相同的性能水平。 对信号矢量进行解码包括:将接收信号矢量y N k乘以通道矩阵H *的共轭转置的信号矢量y k k。 生成列向量z 。 列向量z 的条目被重新排序,并且生成估计的信道矩阵H. 估计的信道矩阵H使用Cholesky分解分解并产生三角矩阵L.三角矩阵L向后求解并且估计信号矢量s N k。 生成发送的符号矢量S N k的估计。

    Low complexity high performance decoder and method of decoding for communications systems using multidimensional signaling
    55.
    发明授权
    Low complexity high performance decoder and method of decoding for communications systems using multidimensional signaling 有权
    低复杂度的高性能解码器和使用多维信令的通信系统的解码方法

    公开(公告)号:US07248651B2

    公开(公告)日:2007-07-24

    申请号:US10644546

    申请日:2003-08-20

    IPC分类号: H03D1/00 H04L27/06

    摘要: A reduced search space minimum distance decoding algorithm provides average probability of error performance close to that of optimal MAP decoding. The decoding algorithm provides dramatic complexity reductions compared with MAP decoding. A sub-optimal decoder receives signal vectors y1 . . . yk. Soft output bits are generated as is a reduced search space V via a reduced search space table creation unit in response to the soft output bits and an estimated channel H. A signal vector b is generated via a maximum likelihood decoding unit in response to the reduced search space V and the signal vectors y1 . . . yk.

    摘要翻译: 减少的搜索空间最小距离解码算法提供误差性能的平均概率接近于最佳MAP解码的概率。 与MAP解码相比,解码算法提供了显着的复杂性降低。 次优解码器接收信号矢量y 1。 。 。 y&lt; k&gt;。 响应于软输出比特和估计的信道H,经由减少的搜索空间表创建单元,生成软输出比特。通过减少的搜索空间表生成单元,通过最大似然解码单元响应于减少的搜索空间 搜索空间V和信号矢量y 1 <1。 。 。 y&lt; k&gt;。

    Orthogonal frequency division multiplexing system with differing control parameters corresponding to different data points in a single symbol
    56.
    发明授权
    Orthogonal frequency division multiplexing system with differing control parameters corresponding to different data points in a single symbol 有权
    具有不同控制参数的正交频分复用系统对应于单个符号中的不同数据点

    公开(公告)号:US07218604B2

    公开(公告)日:2007-05-15

    申请号:US10060502

    申请日:2002-01-30

    IPC分类号: H04J11/00

    CPC分类号: H04L27/2602

    摘要: A wireless transmitter (TX1). The transmitter comprises circuitry for providing a plurality of control (CONTROL) bits and circuitry for providing a plurality of user (USER) bits. The transmitter also comprises circuitry for modulating (16) the plurality of control bits and the plurality of user bits into a stream of complex symbols and circuitry (18) for converting the stream of complex symbols into a parallel plurality of complex symbol streams. The transmitter also comprises circuitry (20) for performing an inverse fast Fourier transform on the parallel plurality of complex symbol streams to form a parallel plurality of OFDM symbols and circuitry (22) for converting the parallel plurality of OFDM symbols into a serial stream of OFDM symbols. Each OFDM symbol in the serial stream of OFDM symbols comprises a plurality of data points, and selected (SF2.x) OFDM symbols in the serial stream of OFDM symbols carry modulation information (AMOD). The modulation information in one or more of the selected OFDM symbols comprises a plurality of modulation groups, and the plurality of modulation groups comprises a number of modulation parameters that describe modulation of a corresponding set of data points in a subsequent OFDM symbol in the serial stream of OFDM symbols.

    摘要翻译: 无线发射机(TX <1> )。 发射机包括用于提供多个控制(CONTROL)比特和用于提供多个用户(USER)比特)的电路的电路。 所述发射机还包括用于将所述多个控制比特和所述多个用户比特调制(16)为复数符号流和电路(18)的电路,用于将复符号流转换为并行多个复符号流。 发射机还包括用于对并行多个复符号流执行快速傅立叶逆变换的电路(20),以形成并行多个OFDM符号和电路(22),用于将并行多个OFDM符号转换成OFDM的串行流 符号。 OFDM符号的串行流中的每个OFDM符号包括多个数据点,并且在OFDM符号的串行流中选择的(SF×2.×N)个OFDM符号携带调制信息(AMOD)。 所选择的OFDM符号中的一个或多个中的调制信息包括多个调制组,并且所述多个调制组包括多个调制参数,所述调制参数描述在串行流中随后的OFDM符号中对应的一组数据点的调制 的OFDM符号。

    Wireless communications system with secondary synchronization code based on values in primary synchronization code
    57.
    发明授权
    Wireless communications system with secondary synchronization code based on values in primary synchronization code 有权
    基于主同步码中的值的无线通信系统具有辅同步码

    公开(公告)号:US07103085B1

    公开(公告)日:2006-09-05

    申请号:US09595561

    申请日:2000-06-16

    IPC分类号: H04B1/38

    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 secondary 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 in the plurality of sequences. The third sequence comprises 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),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)和辅同步码(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(50 1)。 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(50)。 第二序列从多个序列中选择。 多个序列中的每一个相对于多个序列中的所有其他序列是正交的。 第三序列包括来自第一序列的比特的子集。

    Circuit for computing the absolute value of complex numbers
    58.
    发明授权
    Circuit for computing the absolute value of complex numbers 有权
    用于计算复数绝对值的电路

    公开(公告)号:US06999981B2

    公开(公告)日:2006-02-14

    申请号:US10057137

    申请日:2002-01-25

    IPC分类号: G06F7/00 G06F7/38

    CPC分类号: G06F7/552 G06F7/4806

    摘要: An apparatus (100) for computing the absolute value of a complex number includes separate squaring units (110, 115) for the real and imaginary parts. A square root unit (130) extracts the square root of the sum (120) of these squares, which is absolute value of the complex number. Each squaring unit includes one unsigned multipliers for respective least significant and two signed multipliers for respective most significant bits and a cross term. The products are aligned by shifting and summed. The square root unit employs identical processing elements, each considering two bits of the input and forming one root bit and a remainder. Each processing element compares two intermediate test variables, and selects a “1” or “0” for the root bit and the next remainder based upon this comparison. A chain of processing elements enables computation of the root to the desired precision. Alternatively, the same processing elements may be used in a recirculating manner.

    摘要翻译: 用于计算复数的绝对值的装置(100)包括用于实部和虚部的分立的平方单元(110,115)。 平方根单元(130)提取这些正方形的和(120)的平方根,其是复数的绝对值。 每个平方单元包括用于相应最低有效位的一个无符号乘法器和用于相应最高有效位的两个有符号乘法器和交叉项。 产品通过移位和相加进行对齐。 平方根单元采用相同的处理元件,每个元件考虑输入的两个位,并形成一个根位和余数。 每个处理元件比较两个中间测试变量,并根据该比较为根位选择“1”或“0”。 一系列处理元件能够将根计算到所需的精度。 或者,可以以循环方式使用相同的处理元件。

    Power control with space time transmit diversity
    59.
    发明授权
    Power control with space time transmit diversity 有权
    功率控制与时空发射分集

    公开(公告)号:US06977910B1

    公开(公告)日:2005-12-20

    申请号:US09224401

    申请日:1998-12-31

    摘要: A circuit is designed with a measurement circuit (432). The measurement circuit is coupled to receive a first input signal (903) from a first antenna (128) of a transmitter and coupled to receive a second input signal (913) from a second antenna (130) of the transmitter. Each of the first and second signals is transmitted at a first time. The measurement circuit produces an output signal corresponding to a magnitude of the first and second signals. A control circuit (430) is coupled to receive the output signal and a reference signal. The control circuit is arranged to produce a control signal at a second time in response to a comparison of the output signal and the reference signal.

    摘要翻译: 电路设计有测量电路(432)。 测量电路被耦合以从发射机的第一天线(128)接收第一输入信号(903),并被耦合以从发射机的第二天线(130)接收第二输入信号(913)。 第一和第二信号中的每一个在第一时间被发送。 测量电路产生对应于第一和第二信号的幅度的输出信号。 控制电路(430)被耦合以接收输出信号和参考信号。 控制电路被布置成响应于输出信号和参考信号的比较而在第二时间产生控制信号。

    Orthogonal preamble encoder, method of encoding orthogonal preambles and multiple-input, multiple-output communication system employing the same
    60.
    发明授权
    Orthogonal preamble encoder, method of encoding orthogonal preambles and multiple-input, multiple-output communication system employing the same 有权
    正交前导编码器,正交前导码的编码方法和采用该正交前​​导码的多输入多输出通信系统

    公开(公告)号:US06917311B2

    公开(公告)日:2005-07-12

    申请号:US10639418

    申请日:2003-08-11

    摘要: For use with a multiple-input, multiple-output (MIMO) transmitter, an orthogonal preamble encoder, a method of encoding orthogonal preambles and a communication system incorporating the encoder or the method. In one embodiment, the encoder includes: (1) a preamble supplement generator configured to provide a first long sequence preamble supplement to a first transmit antenna of the MIMO transmitter and (2) a preamble supplement coordinator coupled to the preamble supplement generator and configured to provide a second long sequence preamble supplement to a second transmit antenna of the MIMO transmitter, at least a portion of the second long sequence preamble supplement being a negation of the first long sequence preamble supplement.

    摘要翻译: 用于多输入多输出(MIMO)发射机,正交前导码编码器,对正交前导码进行编码的方法和结合编码器的通信系统或方法。 在一个实施例中,所述编码器包括:(1)前导码补充生成器,被配置为向所述MIMO发射机的第一发射天线提供第一长序列前导码补充,以及(2)前缀补充协调器,其耦合到所述前导码补充生成器, 向所述MIMO发射机的第二发射天线提供第二长序列前导码补充,所述第二长序列前同步码补码的至少一部分是所述第一长序列前同步码补码的否定。