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公开(公告)号：US06917629B1
公开(公告)日：2005-07-12
申请号：US09152063
申请日：1998-09-11
CPC分类号： H04L1/0038 , H04L1/0013 , H04L1/0046 , H04L1/0054 , H04L1/0061 , H04L1/08
摘要： An improved system and method for rate detection of transmitted signals is disclosed for use in a IS-95 CDMA downlink. For each speech frame, one of four possible bit rates is used to encode the frame according to the standard. The present invention describes a receiver and various processes that are able to detect which rate was sent without the aid of flag bits or other mode indication information. According to various embodiments of the invention different rate detection processes which can exploit additional code information, such as CRC checks and convolutional coding, are disclosed.
摘要翻译： 公开了用于IS-95 CDMA下行链路中的用于传输信号的速率检测的改进的系统和方法。 对于每个语音帧，四种可能的比特率之一用于根据标准对帧进行编码。 本发明描述了一种接收机和能够检测哪个速率被发送而不借助于标志位或其他模式指示信息的各种过程。 根据本发明的各种实施例，公开了可以利用附加码信息（诸如CRC校验和卷积编码）的不同速率检测过程。
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2.发明授权Information generation for coherent demodulation of differentially encoded signals 失效用于差分编码信号的相干解调的信息生成公开(公告)号：US06487255B1
公开(公告)日：2002-11-26
申请号：US09143754
申请日：1998-08-31
IPC分类号： H04L512
CPC分类号： H04L25/03184 , H04L25/03318 , H04L2025/03375
摘要： Methods and systems are provided which generate hard and soft values from signal samples of a differentially encoded signal by estimating channel coefficients associated with the received signal and determining metrics for each possible symbol pair which indicate the probability of a possible coherent symbol pair being encoded in the signal samples using the estimated channel coefficients and the signal samples. Soft values associated with differential bits or differential symbols encoded in the samples of the signal are then generated based on the determined metrics.
摘要翻译： 提供了通过估计与接收信号相关联的信道系数并确定每个可能符号对的度量的方法和系统，其通过差分编码信号的信号样本产生硬和软值，其指示可能的相干符号对在 信号样本使用估计的信道系数和信号样本。 然后基于所确定的度量来生成与信号样本中编码的差分比特或差分符号相关联的软值。
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公开(公告)号：US08724741B2
公开(公告)日：2014-05-13
申请号：US12572680
申请日：2009-10-02
CPC分类号： H04B17/309 , H04B17/26 , H04L2025/03426
摘要： The quality of a received signal in a non-linear receiver is estimated using a coupling matrix G or Q that describes the interaction of symbols in the received signal with other symbols and/or how the impairment (noise and interference) interacts in the received signal. The coupling matrix is also useful for joint detection. The signal quality estimate may include, e.g., the minimum eigenvalue, and other functions, such as the determinant and trace of the coupling matrix. When G or Q varies with each block, as in CDMA systems employing longcode scrambling, a representative matrix can be used, such as a matrix of RMS values or average magnitudes of real and imaginary components. The signal quality estimate can be expressed as a bit error rate (BER).
摘要翻译： 使用描述接收信号中的符号与其他符号的相互作用和/或接收信号中的损害（噪声和干扰）如何相互作用的耦合矩阵G或Q来估计非线性接收机中的接收信号的质量 。 耦合矩阵对于联合检测也是有用的。 信号质量估计可以包括例如最小特征值和其他函数，诸如耦合矩阵的行列式和轨迹。 当G或Q随每个块变化时，如在使用长码扰码的CDMA系统中，可以使用代表性矩阵，例如RMS值矩阵或实部和虚部分量的平均幅度。 信号质量估计可以表示为误码率（BER）。
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4.发明授权公开(公告)号：US08718199B2
公开(公告)日：2014-05-06
申请号：US13050433
申请日：2011-03-17
IPC分类号： H04L27/06
CPC分类号： H04L25/08 , H04L25/03012 , H04L25/03159 , H04L25/03171 , H04L25/03184 , H04L25/03312 , H04L25/03331 , H04L2025/03414 , H04L2025/03426
摘要： A receiver comprises plural receive antennas and electronic circuitry. The plural receive antennas are configured to receive, on plural subcarriers transmitted over a radio interface, a frequency domain signal that comprises contribution from a block of time domain symbols. The electronic circuitry is configured or operable to perform symbol detection of time domain symbols comprising the block by performing a multi-stage joint detection procedure comprising plural stages, and thus serves as a detector (40). For a first stage the block is divided into a first number of sub-blocks each having a sub-block first size. For a second stage the block is divided into a second number of sub-blocks each having a sub-block second size, the sub-block second size being greater than the sub-block first size. For each stage a detector (40) formulates frequency domain combining weights and uses the frequency domain combining weights for combining multiple receive versions of each subcarrier to provide candidate symbol combination values for symbols in each sub-block of the respective stage. For the second stage the detector (40) is further configured to use the candidate symbol combination values of the first stage to formulate joint hypotheses to serve as candidates for the joint detection operation of the second stage.
摘要翻译： 接收机包括多个接收天线和电子电路。 多个接收天线被配置为在由无线电接口发送的多个子载波上接收包括来自时域符号块的贡献的频域信号。 电子电路被配置或可操作以通过执行包括多个级的多级联合检测过程来执行包括该块的时域符号的符号检测，从而用作检测器（40）。 对于第一阶段，块被分成具有子块第一大小的第一数量的子块。 对于第二级，块被分成第二数量的子块，每个子块具有子块的第二尺寸，子块的第二尺寸大于子块的第一尺寸。 对于每个阶段，检测器（40）制定频域组合权重并使用频域组合权重来组合每个子载波的多个接收版本，以为相应级的每个子块中的符号提供候选符号组合值。 对于第二级，检测器（40）还被配置为使用第一级的候选符号组合值来形成联合假设以用作第二级的联合检测操作的候选。
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5.发明授权公开(公告)号：US08391253B2
公开(公告)日：2013-03-05
申请号：US12572423
申请日：2009-10-02
IPC分类号： H04J3/00
CPC分类号： H04W4/06 , H04B1/707 , H04B2201/70701 , H04J3/00 , H04J13/0044 , H04J13/20
摘要： A pilot channel signal for time-division multiplexing with one or more traffic channel signals in a broadcast/multi-cast signal and for code-division multiplexing with a continuously transmitted pilot channel signal is described. In an exemplary method for transmitting a broadcast/multicast signal, a pilot symbol sequence is obtained for each slot of one or more frames of the broadcast/multicast signal, so that the pilot symbol sequence varies for each slot of a given frame. The pilot symbol sequence for each slot is spread with a channelization code, and the spread pilot symbol sequence for each slot is scrambled, using a scrambling code, to form a first pilot channel signal. The first pilot channel signal is transmitted so that it is time-division multiplexed with one or more traffic channel signals transmitted during each slot and code-division multiplexed with a second pilot channel signal transmitted during all slots of the one or more frames.
摘要翻译： 描述了用于与广播/多播信号中的一个或多个业务信道信号进行时分复用并用于与连续发送的导频信道信号进行码分复用的导频信道信号。 在用于发送广播/多播信号的示例性方法中，为广播/多播信号的一个或多个帧的每个时隙获得导频符号序列，使得导频符号序列对于给定帧的每个时隙而变化。 每个时隙的导频符号序列用信道化码扩展，并且使用扰码对每个时隙的扩展导频符号序列进行加扰，以形成第一导频信道信号。 发送第一导频信道信号，使其与在每个时隙期间发送的一个或多个业务信道信号进行时分复用，并与在一个或多个帧的所有时隙期间发送的第二导频信道进行码分多路复用。
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6.发明授权Method and apparatus for efficient estimation of interference in a wireless receiver 有权用于有效估计无线接收机中的干扰的方法和装置公开(公告)号：US08295417B2
公开(公告)日：2012-10-23
申请号：US12133636
申请日：2008-06-05
申请人： Douglas A. Cairns , Gregory E. Bottomley , Andreas Cedergren , Tracy L. Fulghum , Elias Jonsson
发明人： Douglas A. Cairns , Gregory E. Bottomley , Andreas Cedergren , Tracy L. Fulghum , Elias Jonsson
IPC分类号： H04B7/10
CPC分类号： H04B1/7117 , H04B1/712
摘要： Methods and apparatus for determining an impairment covariance matrix for use in an interference-suppressing CDMA receiver are disclosed. In several of the disclosed embodiments, precise information regarding signal propagation delays is not needed. An exemplary method includes the selection of a plurality of processing delays for processing a received CDMA signal. Net channel coefficients for the processing delays are estimated and used to calculate an impairment covariance matrix. The impairment covariance matrix is calculated as a function of the estimated net channel coefficients and the processing delays, without estimating a propagation medium channel response for the received signal.
摘要翻译： 公开了用于确定用于干扰抑制CDMA接收机的损害协方差矩阵的方法和装置。 在所公开的几个实施例中，不需要关于信号传播延迟的精确信息。 一种示例性方法包括选择用于处理所接收的CDMA信号的多个处理延迟。 用于处理延迟的净通道系数被估计并用于计算损害协方差矩阵。 损伤协方差矩阵作为估计的净通道系数和处理延迟的函数计算，而不估计接收信号的传播介质通道响应。
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7.发明授权Method and apparatus for estimating impairment covariance matrices using unoccupied spreading codes 有权使用未占用扩展码估计损害协方差矩阵的方法和装置公开(公告)号：US08098715B2
公开(公告)日：2012-01-17
申请号：US12135268
申请日：2008-06-09
IPC分类号： H04B1/00
CPC分类号： H04L25/03133 , H04B1/7103 , H04B1/712 , H04B17/327 , H04B2201/709727
摘要： In one of its aspects, the technology concerns a method of processing a signal which includes physical data channels which have been channelized using spreading codes. The method comprises (1) despreading unoccupied spreading codes (e.g., codes which are essentially unobscured by traffic data) included in the signal to obtain unoccupied code despread values, (2) using the unoccupied code despread values to form an impairment covariance matrix; and (3) using the impairment covariance matrix along with a channel estimate to form a processing parameter. The processing parameter can be one of combining sets and a signal quality estimate. In another of its aspects, the technology concerns a coherent, linear equalizer apparatus configured to process a signal which includes physical data channels which have been channelized using spreading codes. The equalizer apparatus comprises plural delay fingers (32) configured to despread unoccupied spreading codes included in the signal to obtain unoccupied code despread values, and a generator (60) configured to use the unoccupied code despread values to form an impairment covariance matrix.
摘要翻译： 在其一个方面，该技术涉及一种处理信号的方法，该信号包括已经使用扩展码被信道化的物理数据信道。 该方法包括：（1）解扩所述信号中包含的未被占用的扩展码（例如，业务数据本质上不被遮挡的代码），以获得未占用的码解扩值，（2）使用未占用码解扩值形成损害协方差矩阵; 和（3）使用损伤协方差矩阵以及信道估计来形成处理参数。 处理参数可以是组合集合和信号质量估计之一。 在另一方面，该技术涉及一种相干的线性均衡器装置，其被配置为处理包括已经使用扩展码被信道化的物理数据信道的信号。 均衡器装置包括：多个延迟指（32），被配置为对包括在信号中的未占用的扩展码进行解扩以获得未占用的码去扩展值;以及生成器（60），被配置为使用未占用的码去扩展值来形成损害协方差矩阵。
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8.发明授权Signal processor for estimating signal parameters using an approximated inverse matrix 有权用于使用近似逆矩阵估计信号参数的信号处理器公开(公告)号：US08045645B2
公开(公告)日：2011-10-25
申请号：US11969692
申请日：2008-01-04
申请人： Gregory E. Bottomley
发明人： Gregory E. Bottomley
CPC分类号： H04B7/0854 , H04B1/71052 , H04B1/712 , H04B2201/709727 , H04L25/0204 , H04L25/0212 , H04L25/0244
摘要： A device that estimates information from a signal includes a receiver for receiving an input signal and electronic processing circuitry. The electronic processing circuitry generates a matrix associated with the input signal and determines an approximation of an inverse of the matrix based on the adjoint of the matrix and a scaling factor associated with the determinant of the matrix. This approximation avoids possible mathematical difficulties that may be encountered in certain situations when a typical matrix inversion is calculated. The approximated inverse matrix is applied to the input signal to transform the input signal into an output signal. Information associated with the input signal is then determined based on the output signal.
摘要翻译： 从信号估计信息的装置包括用于接收输入信号的接收器和电子处理电路。 电子处理电路产生与输入信号相关联的矩阵，并且基于矩阵的伴随和与矩阵的行列式相关联的缩放因子来确定矩阵的逆的近似。 这种近似避免了在计算典型矩阵反演时在某些情况下可能遇到的可能的数学困难。 将近似的逆矩阵施加到输入信号以将输入信号变换为输出信号。 然后基于输出信号确定与输入信号相关联的信息。
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公开(公告)号：US08000655B2
公开(公告)日：2011-08-16
申请号：US12339967
申请日：2008-12-19
IPC分类号： H04B1/00
CPC分类号： H04B1/7103 , H04B7/0891
摘要： A node (e.g., base station, signal processing unit) is described herein that includes a symbol detector and a method which are capable of suppressing interference caused by one user device (which may be in softer handoff mode) to reduce performance degradation to other intra-cell user devices and/or other inter-cell user devices (which may not be in softer handoff mode).
摘要翻译： 本文描述了一种节点（例如，基站，信号处理单元），其包括能够抑制由一个用户设备（其可能处于更软切换模式）引起的干扰的符号检测器和方法，以降低其他内部 - 小区用户设备和/或其他小区间用户设备（其可能不处于更软切换模式）。
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公开(公告)号：US20110129000A1
公开(公告)日：2011-06-02
申请号：US12628341
申请日：2009-12-01
CPC分类号： H04L25/03006 , H04B1/71057 , H04B2201/709727 , H04L25/03178 , H04L25/03203 , H04L25/03331 , H04L2025/03426
摘要： The computation of code-specific channel matrices for an Assisted Maximum Likelihood Detection (AMLD) receiver comprises separately computing high rate matrices that change each symbol period, and a low rate matrix that is substantially constant over a plurality of symbol periods. The high and low rate matrices are combined to generate a code-specific channel matrix for each receiver stage. The high rate matrices include scrambling and spreading code information, and the low rate matrices include information on the net channel response and combining weights. The low rate matrices are efficiently computed by a linear convolution in the frequency domain of the net channel response and combining weights (with zero padding to avoid circular convolution), then transforming the convolution to the time domain and extracting matrix elements. Where the combining weights are constant across stages, a common code-specific channel matrix may be computed and used in multiple AMLD receiver stages.
摘要翻译： 用于辅助最大似然检测（AMLD）接收机的代码特定信道矩阵的计算包括分别计算改变每个符号周期的高速率矩阵和在多个符号周期上基本上恒定的低速率矩阵。 组合高速和低速率矩阵以为每个接收机级生成代码特定的信道矩阵。 高速率矩阵包括加扰和扩展码信息，低速率矩阵包括关于网络信道响应和组合权重的信息。 低速率矩阵通过网络通道响应的频域中的线性卷积和组合权重（零填充以避免循环卷积）有效地计算，然后将卷积变换到时域并提取矩阵元素。 在组合权重跨越阶段恒定的情况下，可以在多个AMLD接收机阶段中计算和使用公共的特定码通道矩阵。
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