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71. 发明申请

US20110211661A1 Metrics Calculations Utilizing Pre-Stored Values 有权
标题翻译：使用预存值的指标计算
公开(公告)号：US20110211661A1
公开(公告)日：2011-09-01
申请号：US13106616
申请日：2011-05-12
申请人： Cyril Valadon
发明人： Cyril Valadon
IPC分类号： H04L27/06
CPC分类号： H04L25/03292 , H04L25/03184 , H04L25/03235
摘要： A trellis processing technique for estimating a transmitted signal from a received signal acquired through a channel achieves a reduced computational structure when implementing a DDFSE-like branch metrics calculation by pre-storing computed values, which can be re-used. The technique involves storing differences between a received symbol and different products, each of which is a product of a channel coefficient corresponding to a least time delay and a different possible transmitted symbol. A summation of products is calculated, each product being a product of a possible transmitted signal symbol and a channel coefficient other than the channel coefficient corresponding to the least time delay, the summation being specific to a branch-start state in a trellis. The summation is combined with different stored differences in a calculation of branch metrics leading to different branch-end states in the trellis.
摘要翻译：用于通过信道获取的接收信号估计发射信号的网格处理技术通过预先存储可重新使用的计算值来实现类似DDFSE的分支量度计算，实现了减少的计算结构。该技术涉及存储接收符号和不同产品之间的差异，每个产品是与最小时间延迟对应的信道系数与不同可能发送符号的乘积。计算产品的总和，每个产品是可能的传输信号符号的乘积和不同于最小时间延迟的信道系数的通道系数，该总和特定于网格中的分支开始状态。总和与不同的存储差异结合在分支度量的计算中，导致网格中不同的分支结束状态。

72. 发明申请

US20110096873A1 METHOD FOR POST DETECTION IMPROVEMENT IN MIMO 有权
标题翻译： MIMO中检测改进的方法
公开(公告)号：US20110096873A1
公开(公告)日：2011-04-28
申请号：US12604570
申请日：2009-10-23
申请人： Ali S. Khayrallah
发明人： Ali S. Khayrallah
IPC分类号： H04L27/06
CPC分类号： H04L25/03305 , H04L25/03184 , H04L25/03331 , H04L2025/03426
摘要： A two-stage approach to MIMO detection improves receiver performance in a computationally tractable manner. A whitening joint detector processes a MIMO symbol stream. The whitening joint detector includes a pre-filter operative to suppress a first subset of the received MIMO streams as colored noise. The whitening joint detector further includes a primary joint detector operative to process a second subset of the MIMO streams and to output a preliminary solution obtained by minimizing a whitening joint detection metric. A secondary detector then operates in the vicinity of the primary joint detector preliminary solution. The secondary detector improves the preliminary solution by comparison to a full joint detection metric.
摘要翻译： MIMO检测的两阶段方法以计算容易的方式改善了接收机的性能。美白联合检测器处理MIMO符号流。美白联合检测器包括一个预滤波器，用于将接收的MIMO流的第一子集抑制为有色噪声。美白联合检测器还包括主接头检测器，其操作以处理MIMO流的第二子集，并输出通过使美白关节检测度量最小化获得的初步解。次级检测器然后在主接头检测器初步解决方案附近操作。二次检测器通过与全关节检测度量相比较来改善初步解决方案。

73. 发明申请

US20110038402A1 METHOD AND APPARATUS FOR AN IMPROVED WIRELESS COMMUNICATION RECEIVER 有权
标题翻译：改进的无线通信接收机的方法和装置
公开(公告)号：US20110038402A1
公开(公告)日：2011-02-17
申请号：US12542335
申请日：2009-08-17
申请人： Ali S. Khayrallah
发明人： Ali S. Khayrallah
IPC分类号： H04L5/16 , H03H7/30
CPC分类号： H04L25/03171 , H04L25/03184 , H04L25/03203 , H04L25/03286 , H04L25/03318
摘要： As disclosed herein, a “super receiver” structure enriches the information provided for decoding modem bits included in a received sequence of symbols. In particular, an equalizer circuit provides joint metrics to a decoder circuit, where the joint metrics advantageously reflect joint bit probabilities. However, the metrics are computed without need for complex joint probability calculations. The decoder circuit “fuses” the joint metrics with corresponding side information, which indicates the likelihood that one or more bits represented by the joint metric take on a particular value. Such fusing biases the soft value estimation for the other bits represented by the joint metric, thus enabling the decoder to operate on refined soft values in its bit decoding operations.
摘要翻译：如本文所公开的，“超级接收机”结构丰富了用于解码包含在所接收的符号序列中的调制解调器位的信息。特别地，均衡器电路向解码器电路提供联合度量，其中联合度量有利地反映了联合位概率。然而，在不需要复杂联合概率计算的情况下计算度量。解码器电路将联合度量与相应的侧面信息“融合”，其指示由联合度量表示的一个或多个比特具有特定值的可能性。这种融合偏置了由联合度量表示的其他位的软值估计，从而使解码器能够在其位解码操作中对精细的软值进行操作。

74. 发明授权

US07583741B2 Likelihood corrector and likelihood correction method 有权
标题翻译：似然校正器和似然校正方法
公开(公告)号：US07583741B2
公开(公告)日：2009-09-01
申请号：US11511258
申请日：2006-08-29
申请人： Hiroji Akahori
发明人： Hiroji Akahori
IPC分类号： H04L27/06 , H04L27/28
CPC分类号： H04L25/03184 , H04L1/0054 , H04L27/261 , H04L2025/03414
摘要： In an orthogonal frequency division multiplexing system using a scattered pilot signal, after equalization and Fourier transformation of the received signal, the pilot signals are extracted and further processed to generate likelihood values. In one process, the transformed signal is multiplied by the reciprocal of a variance. In another process, the transformed signal is multiplied by the reciprocal of a mean amplitude and by a weighted signal-to-interference ratio. These processes enable appropriate likelihoods to be obtained despite fast fading, shadowing, and automatic gain control.
摘要翻译：在使用分散导频信号的正交频分复用系统中，在接收信号的均衡和傅里叶变换之后，提取导频信号并进一步处理以产生似然值。在一个过程中，变换的信号乘以方差的倒数。在另一过程中，变换的信号乘以平均振幅的倒数和加权的信号与干扰比。尽管快速衰落，阴影和自动增益控制，这些过程能够获得适当的可能性。

75. 发明申请

US20090022217A1 EQUALIZER AND EQUALIZATION METHOD 失效
标题翻译：均衡和均衡方法
公开(公告)号：US20090022217A1
公开(公告)日：2009-01-22
申请号：US12278098
申请日：2007-01-26
申请人： Masayuki Kimata
发明人： Masayuki Kimata
IPC分类号： H03H7/40 , H03H7/30
CPC分类号： H04W52/24 , H04B7/0854 , H04L25/0204 , H04L25/03159 , H04L25/03184 , H04L25/03968
摘要： A correction coefficient calculating section 20 calculates a correction coefficient β so as to obtain a noise power equivalent to detected path and adjacent path transmission channel estimation values. A noise power correcting section 21 calculates a corrected noise power βN0. A weight calculating section 8 receives as its input a frequency-domain transmission channel estimation value H(f) being an output of an FFT section 7 and the noise power βN0 corrected by the noise power correcting section 21 and calculates a weight of an equalization filter by MMSE.
摘要翻译：校正系数计算部20计算校正系数β，以获得等于检测到的路径和相邻路径传输路径估计值的噪声功率。噪声功率校正部21计算校正噪声功率βN0。权重计算部分8接收作为FFT部分7的输出的频域传输信道估计值H（f）和由噪声功率校正部分21校正的噪声功率βN0作为其输入，并计算均衡滤波器的权重通过MMSE。

76. 发明申请

US20080095281A1 MIMO decoding 审中-公开
标题翻译： MIMO解码
公开(公告)号：US20080095281A1
公开(公告)日：2008-04-24
申请号：US11323746
申请日：2005-12-30
申请人： Srinath Hosur , Michael O. Polley , Anuj Batra , Manish Goel
发明人： Srinath Hosur , Michael O. Polley , Anuj Batra , Manish Goel
IPC分类号： H04B7/10 , H04L1/02
CPC分类号： H04L25/03203 , H04L1/0631 , H04L25/03184 , H04L25/0328 , H04L27/2601
摘要： In a wireless MIMO system with interference cancellation, compensate for decision errors in the cancelled symbols by adjustments to the scaling of the soft estimates with additive interference-proportional to estimates of the decision error probability.
摘要翻译：在具有干扰消除的无线MIMO系统中，通过对具有与决策误差概率的估计成比例的加性干扰的软估计的缩放进行调整来补偿所取消符号中的判定误差。

77. 发明授权

US07269226B2 Data processing method 有权
标题翻译：数据处理方法
公开(公告)号：US07269226B2
公开(公告)日：2007-09-11
申请号：US10010429
申请日：2001-12-03
申请人： Teemu Sipilä
发明人： Teemu Sipilä
IPC分类号： H04L5/12 , H04L27/06 , G06F11/00 , H03M13/00
CPC分类号： H04L25/0218 , H04L25/03178 , H04L25/03184
摘要： A suboptimal method for searching for a symbol sequence, the method comprising the steps of: determining a channel impulse response; sampling a received signal; selecting at least one of the highest and/or most reliable impulse response values; determining a reference signal using at least one impulse response value and a symbol sequence assumed as transmitted; determining differential terms corresponding to the selected impulse response values for the signal sample and the reference signal; using the determined differential terms in a transition metric for searching for a symbol sequence; forming a survivor path by adding the symbol sequence provided by the transition metric to the survivor path formed so far.
摘要翻译：一种用于搜索符号序列的次优方法，所述方法包括以下步骤：确定信道脉冲响应; 对接收到的信号进行采样; 选择最高和/或最可靠的脉冲响应值中的至少一个; 使用假定为发送的至少一个脉冲响应值和符号序列来确定参考信号; 确定与所选择的脉冲响应值相对应的用于信号样本和参考信号的微分项; 使用所确定的用于搜索符号序列的转换度量中的差分项; 通过将由转换度量提供的符号序列添加到迄今形成的幸存路径来形成幸存路径。

78. 发明授权

US07218665B2 Deferred decorrelating decision-feedback detector for supersaturated communications 有权
标题翻译：用于过饱和通信的延迟去相关决策反馈检测器
公开(公告)号：US07218665B2
公开(公告)日：2007-05-15
申请号：US10423655
申请日：2003-04-25
申请人： Thomas P McElwain
发明人： Thomas P McElwain
IPC分类号： H04B1/00 , H03D1/00 , H04L27/06
CPC分类号： H04L25/0204 , H04B1/7105 , H04B1/71052 , H04B1/71072 , H04L25/021 , H04L25/0242 , H04L25/03184 , H04L25/03216 , H04L25/0328 , H04L25/03292 , H04L25/03299 , H04L25/03331 , H04L2025/03401
摘要： The present invention provides an efficient means of estimating symbols transmitted in a multi-user environment in overloaded or super-saturated conditions by employing a deferred decorrelating decision feedback detector. In one embodiment, the present invention comprises a parameter estimation unit, filter bank, overloaded whitener and decision tree-based hypothesis testing. Parameter estimation defines the matched filter bank, whitening filters, and the terms of the hypothesis testing module. The whitening filter partially decouples co-channel interference and partially whitens the noise. The decision tree approach defers decisions until more evidence is accumulated and is a generalization that encompasses the jointly optimal maximum likelihood detector as well as the simpler decision feedback detectors.
摘要翻译：本发明提供了一种通过使用延迟去相关决策反馈检测器来估计在多用户环境中在过载或超饱和条件下发送的符号的有效手段。在一个实施例中，本发明包括参数估计单元，滤波器组，过载白化和基于决策树的假设检验。参数估计定义了匹配滤波器组，白化滤波器和假设测试模块的项。白化滤波器部分地解耦同信道干扰并部分地使噪声变白。决策树方法延续决策，直到更多的证据被积累，并且是涵盖联合最佳最大似然检测器以及更简单的判决反馈检测器的泛化。

79. 发明授权

US07190743B2 Method and apparatus for optimizing tree pruning in a multiuser detector 有权
标题翻译：在多用户检测器中优化树木修剪的方法和装置
公开(公告)号：US07190743B2
公开(公告)日：2007-03-13
申请号：US10207490
申请日：2002-07-29
申请人： Rachel E. Learned
发明人： Rachel E. Learned
IPC分类号： H03D1/00
CPC分类号： H04L1/0059 , H04L1/0048 , H04L1/0054 , H04L25/0204 , H04L25/021 , H04L25/0242 , H04L25/03184 , H04L25/03203 , H04L25/0328 , H04L25/03292 , H04L25/03299 , H04L25/03331
摘要： A multi-user decoder is disclosed in which interfering users are assigned to levels of a decoding tree constructed in the decoder dependent on the power levels of the user's received signals and for each symbol interval. By building the decoding tree in this manner for each symbol interval, a reduced complexity search is more likely to include paths and nodes in the tree containing the correct value for the channel symbols.
摘要翻译：公开了一种多用户解码器，其中根据用户的接收信号的功率电平和每个符号间隔，将干扰用户分配给在解码器中构造的解码树的电平。通过以每个符号间隔的方式构建解码树，降低的复杂度搜索更可能包括树中包含通道符号的正确值的路径和节点。

80. 发明授权

US07136435B2 Modified branch metrics for processing soft decisions to account for phase noise impact on cluster variance 有权
公开(公告)号：US07136435B2
公开(公告)日：2006-11-14
申请号：US10112009
申请日：2002-03-30
申请人： Thomas J. Kolze
发明人： Thomas J. Kolze
IPC分类号： H03D1/00 , H03D3/00
CPC分类号： H04L25/067 , H04L25/03184 , H04L27/2647
摘要： Modified branch metrics for processing bit-soft decisions to account for phase noise impact on cluster variance (CV). The present invention is able to partition a modulation scheme's constellation into two or more regions, so that the bit-soft decision branch metrics may be adjusted based on the CV of the various constellation points. A confidence level may be attached to the various constellation points based on their particular CVs. There are a number of methods to ascertain the CV of the constellation's points, including finding characteristics of various components in a communication system (transmitter, communication channel and receiver), and any method may be used within various embodiments. The modification of the branch metrics/confidence level may be performed in a communication receiver; the communication receiver may be implemented in a communication system employing the vector orthogonal frequency division multiplexing (VOFDM) portion of the broadband wireless internet forum (BWIF).

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