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公开(公告)号：US06922434B2
公开(公告)日：2005-07-26
申请号：US09845950
申请日：2001-04-30
IPC分类号： H04B1/7117 , H04B1/712 , H04B1/69
CPC分类号： H04B1/712 , H04B1/7117 , H04B2201/709727
摘要： Methods of recovering information encoded in a spread spectrum signal transmitted according to a spreading sequence in a communications medium are provided in which a spread spectrum signal is received from the communications medium and correlated with a spreading sequence to produce a plurality of time-offset correlations. Some of these time-offset correlations may be designed to cancel out known interfering signals. A subset of the plurality of time-offsets may then be selected, and corresponding traffic correlations may then be combined using a weighted combination to estimate information encoded in the transmitted spread spectrum signal. Receivers for implementing these methods are also provided.
摘要翻译： 提供了恢复在通信介质中根据扩展序列发送的扩频信号中编码的信息的方法，其中从通信介质接收扩频信号并与扩展序列相关联以产生多个时间偏移相关。 这些时间偏移相关中的一些可被设计为消除已知的干扰信号。 然后可以选择多个时间偏移的子集，然后可以使用加权组合来组合对应的业务相关性，以估计在所发送的扩展频谱信号中编码的信息。 还提供了实现这些方法的接收器。
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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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3.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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4.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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5.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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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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7.发明授权公开(公告)号：US07738534B2
公开(公告)日：2010-06-15
申请号：US11566820
申请日：2006-12-05
IPC分类号： H04B1/707
CPC分类号： H04B1/712 , H04B1/7107 , H04B1/7115 , H04B2201/709727 , H04J13/0077
摘要： Multi-transmitter interference caused by one or more interfering own-cell and/or other-cell transmitters is reduced in a RAKE-based receiver. The RAKE-based receiver comprises a plurality of RAKE fingers, a processor and a combiner. The plurality of RAKE fingers are configured to despread received symbols, wherein a delay for a first one of the plurality of RAKE fingers corresponds to a symbol of interest transmitted by a first transmitter and a delay for a second one of the plurality of RAKE fingers corresponds to an interfering symbol transmitted by a second transmitter. The processor is configured to determine a cross-correlation between the symbol of interest and the interfering symbol. The combiner is configured to combine the symbol of interest with the interfering symbol using the cross-correlation to reduce interference attributable to the interfering symbol from the symbol of interest.
摘要翻译： 在基于RAKE的接收机中减少由一个或多个干扰自身小区和/或其他小区发射机引起的多发射机干扰。 基于RAKE的接收机包括多个RAKE指，处理器和组合器。 多个RAKE指状物被配置为对接收到的符号进行解扩，其中多个RAKE指中的第一个RAKE指的延迟对应于由第一发送器发送的感兴趣的符号，并且多个RAKE指中的第二个对应的延迟对应 到由第二发射机发射的干扰符号。 处理器被配置为确定感兴趣的符号和干扰符号之间的互相关。 组合器被配置为使用互相关来组合感兴趣的符号与干扰符号，以减少归因于感兴趣符号的干扰符号的干扰。
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8.发明申请公开(公告)号：US20090323777A1
公开(公告)日：2009-12-31
申请号：US12147260
申请日：2008-06-26
CPC分类号： H04B1/712 , H04B1/7107 , H04B1/71072 , H04B2201/709727
摘要： Methods and apparatus are disclosed for suppressing both own-cell and other-cell interference in the processing of multiple signals of interest in a received composite signal. In an exemplary embodiment of the methods disclosed herein, combining weights for each of a first plurality of signals of interest in a composite information signal are computed, based on first shared signal correlation data computed from the composite information signal. A reduced-interference composite signal is calculated from the composite information signal, using, for instance, subtractive interference cancellation or interference projection techniques. Combining weights for processing each of a second plurality of signals of interest are computed as a function of second shared signal correlation data corresponding to the reduced-interference composite signal. Corresponding apparatus, including G-Rake and chip equalizer embodiments are also disclosed.
摘要翻译： 公开了用于在接收到的复合信号中处理多个感兴趣信号的同时抑制自身小区和其他小区干扰的方法和装置。 在本文公开的方法的示例性实施例中，基于从复合信息信号计算的第一共享信号相关数据来计算组合信息信号中的感兴趣的第一多个信号中的每一者的权重。 使用例如减法干扰消除或干涉投影技术，从复合信息信号计算降低干扰的复合信号。 作为与减小干涉复合信号对应的第二共享信号相关数据的函数，计算用于处理感兴趣的第二多个信号中的每一个的组合权重。 还公开了包括G-Rake和码片均衡器实施例的相应装置。
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公开(公告)号：US20090213907A1
公开(公告)日：2009-08-27
申请号：US12035846
申请日：2008-02-22
CPC分类号： H04L25/03203 , H04B1/7105 , H04L25/03248 , H04L25/03318 , H04L2025/0342
摘要： Teachings presented herein combine the relative simplicity of equalization with the performance of maximum likelihood (ML) processing. These teachings are applied to the detection of symbols in a stream of symbol blocks. In one or more embodiments, block-based equalization, including feedforward filtering, suppresses inter-block interference and produces detection statistics for the symbols in each symbol block, and joint detection addresses intra-block interference by jointly detecting the most likely combination of symbols within each symbol block, based on the corresponding detection statistics. The joint detection obviates the need to address intra-block interference within the equalization filters, while, at the same time, the block-based equalization produces detection statistics for each symbol block thereby simplifying the joint detection process. Overall complexity is less than would be needed for full MLSE processing of the symbol blocks without equalization preprocessing, while performance is close to or on par with full MLSE processing.
摘要翻译： 本文提出的教学将均衡的相对简单性与最大似然（ML）处理的性能相结合。 这些教导应用于符号块流中符号的检测。 在一个或多个实施例中，包括前馈滤波的基于块的均衡抑制块间干扰并且产生每个符号块中的符号的检测统计，并且联合检测通过联合检测在块内干扰中最可能的符号组合 每个符号块，根据相应的检测统计。 联合检测不需要解决均衡滤波器内的块内干扰，同时基于块的均衡产生每个符号块的检测统计量，从而简化了联合检测过程。 总体复杂度小于没有均衡预处理的符号块的全MLSE处理所需要的，而性能接近于或与完全MLSE处理相当。
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公开(公告)号：US08498325B2
公开(公告)日：2013-07-30
申请号：US12016608
申请日：2008-01-18
IPC分类号： H04B1/00
CPC分类号： H04B1/712 , H04B2201/709727
摘要： The teachings presented herein improve the processing of individual signals of interest included in a received composite signal by computing combining weights and/or signal quality estimates for each signal of interest, e.g., for linear equalization, based on either shared or non-shared correlation estimates. As a non-limiting advantage, the use of shared correlation estimates reduces computational loading as compared to the processing load that would be needed for computing non-shared correlation estimates for all signals of interest. As a further non-limiting advantage, the conditional use of shared and non-shared correlation estimates provides for the use of non-shared correlation estimates where signal characteristic(s) of one or more of the signals of interest warrant such usage, e.g., for one or more high-rate signals of interest.
摘要翻译： 本文提出的教导通过基于共享或非共享相关估计来计算每个感兴趣信号的组合权重和/或信号质量估计，例如用于线性均衡，来改进包括在接收到的复合信号中的感兴趣的各个信号的处理 。 作为非限制性优点，与用于计算所有感兴趣的信号的非共享相关估计所需的处理负载相比，共享相关估计的使用减少了计算负载。 作为进一步的非限制性优点，共享和非共享相关估计的条件使用提供了使用非共享相关估计，其中一个或多个感兴趣信号的信号特征允许这种使用，例如， 用于一个或多个感兴趣的高速率信号。
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