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1. 发明授权

US07957493B2 Candidate generation 有权
标题翻译：候选人
公开(公告)号：US07957493B2
公开(公告)日：2011-06-07
申请号：US11926625
申请日：2007-10-29
申请人： Rafi Dalla Torre , Doron Burshtein , Oren Peles , Deric W. Waters
发明人： Rafi Dalla Torre , Doron Burshtein , Oren Peles , Deric W. Waters
IPC分类号： H04L27/06
CPC分类号： H04L25/03006 , H04L25/061 , H04L2025/0342 , H04L2025/03426
摘要： A method and system for generating a set of candidate symbols. A system includes a Multiple Input Multiple Output (“MIMO”) receiver. The receiver includes a candidate generation look-up table (“LUT”) that provides a list of candidate values for a transmitted symbol selected from a constellation of symbols. The candidate generation LUT stores candidate lists for a portion of the constellation of symbols. The portion of the constellation for which candidate lists are stored is selected according to a symmetry of the constellation. The LUT preferably provides a secondary constellation superimposed on a decision region of a primary constellation. The LUT also preferably includes an inner point of the primary constellation and outer points of the primary constellation. The primary and secondary constellations are preferably compressed by application of quadrant, mirror, and inner-point symmetries.
摘要翻译：一种用于生成一组候选符号的方法和系统。系统包括多输入多输出（“MIMO”）接收机。接收机包括候选生成查询表（“LUT”），其提供从符号星座中选择的发送符号的候选值的列表。候选产生LUT存储符号星座的一部分的候选列表。根据星座的对称性选择存储候选列表的星座部分。 LUT优选地提供叠加在主要星座的决定区域上的次星座。 LUT还优选地包括主星座的内点和主星座的外点。主要和次要星座优选通过应用象限，反射镜和内点对称来压缩。

2. 发明授权

US07957484B2 Candidate list generation and interference cancellation framework for MIMO detection 有权
标题翻译：用于MIMO检测的候选列表生成和干扰消除框架
公开(公告)号：US07957484B2
公开(公告)日：2011-06-07
申请号：US11930259
申请日：2007-10-31
申请人： Deric W. Waters , Naftali Sommer , Anuj Batra , Srinath Hosur , Doron Burshtein , Rafi Dalla Torre , Oren Peles , Daniel Wajcer
发明人： Deric W. Waters , Naftali Sommer , Anuj Batra , Srinath Hosur , Doron Burshtein , Rafi Dalla Torre , Oren Peles , Daniel Wajcer
IPC分类号： H04L27/00
CPC分类号： H04L25/03006 , H04L2025/03426
摘要： A method and system for performing Multiple-Input Multiple-Output (“MIMO”) detection that reduces complexity by decomposing MIMO detection problem into two less complex problems, Candidate List generation and Interference Cancellation (“CLIC”). Embodiments of the CLIC framework parse an N element channel output into a first set containing S elements and a second set containing N−S elements. A first list of candidate vectors is generated from the first set of elements. A set of interference cancelled elements is generated by using the first list of candidate vectors to cancel interference from the second set of elements. A second list of candidate vectors is generated from the set of interference cancelled elements. A minimum cost is computed for each bit of the candidate vectors and from the costs a log-likelihood ratio is computed.
摘要翻译：一种用于执行多输入多输出（“MIMO”）检测的方法和系统，其通过将MIMO检测问题分解成两个较不复杂的问题，候选列表生成和干扰消除（“CLIC”）来降低复杂度。 CLIC框架的实施例将N元素信道输出解析为包含S个元素的第一集合和包含N-S个元素的第二集合。从第一组元素生成候选向量的第一列表。通过使用候选向量的第一列表来消除来自第二组元素的干扰来生成一组干扰消除元素。从干扰消除元素的集合生成候选向量的第二列表。针对候选向量的每一位计算最小成本，并从成本计算对数似然比。

3. 发明授权

US07961826B2 Parameterized sphere detector and methods of using the same 有权
标题翻译：参数化球面探测器及其使用方法
公开(公告)号：US07961826B2
公开(公告)日：2011-06-14
申请号：US11928863
申请日：2007-10-30
申请人： Deric W. Waters , Oren Peles , Anuj Batra , Srinath Hosur , Doron Burshtein
发明人： Deric W. Waters , Oren Peles , Anuj Batra , Srinath Hosur , Doron Burshtein
IPC分类号： H04B7/10 , H04L1/02
CPC分类号： H04L25/03242 , H04L2025/03414 , H04L2025/03426
摘要： A Multiple-input Multiple-Output (MIMO) receiver is provided. The MIMO receiver comprises a parameterized sphere detector having two search modes. During a first search mode, the parameterized sphere detector enumerates a number of best candidate vectors up to a fixed parameter value. During a second search mode, the parameterized sphere detector enumerates additional candidate vectors using a greedy search until a predetermined number of candidate vectors have been enumerated.
摘要翻译：提供多输入多输出（MIMO）接收机。 MIMO接收机包括具有两个搜索模式的参数化球体检测器。在第一搜索模式期间，参数化球体检测器枚举多达一个固定参数值的最佳候选向量。在第二搜索模式期间，参数化球体检测器使用贪婪搜索枚举附加候选向量，直到已经列举了预定数量的候选向量。

4. 发明授权

US08548495B2 System and method for determining a position of a mobile wireless device by accessing access points alamanacs database 有权
标题翻译：用于通过访问接入点alamanacs数据库来确定移动无线设备的位置的系统和方法
公开(公告)号：US08548495B2
公开(公告)日：2013-10-01
申请号：US13227844
申请日：2011-09-08
申请人： Deric W. Waters , Sthanunathan Ramakrishnan
发明人： Deric W. Waters , Sthanunathan Ramakrishnan
IPC分类号： H04W24/00
CPC分类号： H04W64/003 , G01S5/0027 , G01S5/0036 , G01S5/0252
摘要： A system and method for determining a position of a mobile wireless device using wireless local area network access points (APs). In one embodiment, a mobile wireless device includes an AP positioning system configured to estimate a position of the device based on locations of APs disposed about the device. The AP positioning system is configured to: 1) access an AP database; and 2) provide, to the database, one or more medium access controller (MAC) addresses and an area of interest value. The AP positioning system is also configured to retrieve, from the database: 1) location information for each AP having a provided MAC address, or located within the area of interest; and 2) at least one of: signal parameters for the APs nearby the device, a geographic area within which each MAC address can be received, and an indication of a scan type to used for identifying APs.
摘要翻译：一种用于使用无线局域网接入点（AP）确定移动无线设备的位置的系统和方法。在一个实施例中，移动无线设备包括被配置为基于设置在设备周围的AP的位置来估计设备的位置的AP定位系统。 AP定位系统配置为：1）访问AP数据库; 和2）向数据库提供一个或多个媒体访问控制器（MAC）地址和感兴趣的区域的价值。 AP定位系统还被配置为从数据库检索：1）具有提供的MAC地址或位于感兴趣区域内的每个AP的位置信息; 以及2）以下中的至少一个：设备附近的AP的信号参数，可以接收每个MAC地址的地理区域以及用于识别AP的扫描类型的指示。

5. 发明授权

US08243843B2 Systems and methods for low-complexity MIMO detection using leaf-node prediction via look-up tables 有权
标题翻译：用于通过查找表使用叶节点预测的低复杂度MIMO检测的系统和方法
公开(公告)号：US08243843B2
公开(公告)日：2012-08-14
申请号：US13079944
申请日：2011-04-05
申请人： David L. Milliner , Deric W. Waters , Anuj Batra , Srinath Hosur
发明人： David L. Milliner , Deric W. Waters , Anuj Batra , Srinath Hosur
IPC分类号： H04B7/02
CPC分类号： H04L27/2601 , H04L25/0202
摘要： A method for building a look-up table for a receiver in a multiple-input multiple-output (MIMO) detection system simulates a MIMO detector over many channel realizations, tracks channel metric and parameter values used for each channel realization resulting from such simulating, and stores, in a look-up table, best values of the tracked values used for a particular channel metric.
摘要翻译：用于构建多输入多输出（MIMO）检测系统中的接收机的查找表的方法通过许多信道实现来模拟MIMO检测器，跟踪由这样的模拟产生的每个信道实现所使用的信道度量和参数值，并且在查找表中存储用于特定信道度量的被跟踪值的最佳值。

6. 发明授权

US08131230B2 Method and system for FM transmitter coexistence 有权
标题翻译： FM发射机共存的方法和系统
公开(公告)号：US08131230B2
公开(公告)日：2012-03-06
申请号：US12394372
申请日：2009-02-27
申请人： Ariton E. Xhafa , Deric W. Waters
发明人： Ariton E. Xhafa , Deric W. Waters
IPC分类号： H03B1/04
CPC分类号： H04W16/14 , H04B1/034
摘要： A system and method for operating an FM system and wireless networking system coexistent in a mobile wireless device. A mobile wireless device includes a frequency modulation (“FM”) system that includes an FM transmitter and, optionally, an FM receiver. The mobile wireless device also includes a wireless networking system having a network receiver. The FM system is configured to disable the FM transmitter if an amplitude of a modulating signal provided to the FM transmitter is below a predetermined threshold.
摘要翻译：一种用于操作在移动无线设备中共存的FM系统和无线网络系统的系统和方法。移动无线设备包括包括FM发射机和可选地FM接收机的频率调制（“FM”）系统。移动无线设备还包括具有网络接收机的无线网络系统。 FM系统被配置为如果向FM发射机提供的调制信号的幅度低于预定阈值，则禁用FM发射机。

7. 发明授权

US08023577B2 Systems and methods for efficient channel classification 有权
标题翻译：高效渠道分类的系统和方法
公开(公告)号：US08023577B2
公开(公告)日：2011-09-20
申请号：US12024029
申请日：2008-01-31
申请人： Tarkesh Pande , Deric W. Waters , Srinath Hosur , Anuj Batra
发明人： Tarkesh Pande , Deric W. Waters , Srinath Hosur , Anuj Batra
IPC分类号： H04B17/00 , H04B3/46 , H04Q1/20
CPC分类号： H04L25/0204 , H04B7/0417 , H04B7/066 , H04L2025/03426
摘要： Embodiments provide a system and method for efficiently classifying different channel types in an orthogonal frequency division multiplexing (OFDM) system. Embodiments quantify the frequency selectivity in a channel by measuring the variation in a particular channel statistic across sub-carriers in an OFDM system, involve minimal complexity in implementation, and can be used in a variety of scenarios. One embodiment is a method for classifying channels in an OFDM system, comprising measuring variation of at least one channel statistic across sub-carriers, quantifying the variation to determine a measurement value, and applying the measurement value to at least one threshold to classify the channel.
摘要翻译：实施例提供了一种用于在正交频分复用（OFDM）系统中有效地分类不同信道类型的系统和方法。实施例通过测量OFDM系统中跨子载波的特定信道统计量的变化来量化信道中的频率选择性，涉及实现中的最小复杂度，并且可以用于各种情况。一个实施例是一种用于对OFDM系统中的信道进行分类的方法，包括测量跨越子载波的至少一个信道统计量的变化，量化变化以确定测量值，以及将测量值应用于至少一个阈值以对信道进行分类。

8. 发明授权

US07945008B2 Systems and methods for lattice enumeration-aided detection 有权
标题翻译：网格计数辅助检测系统和方法
公开(公告)号：US07945008B2
公开(公告)日：2011-05-17
申请号：US12032309
申请日：2008-02-15
申请人： David L. Milliner , Anuj Batra , Srinath Hosur , Deric W. Waters
发明人： David L. Milliner , Anuj Batra , Srinath Hosur , Deric W. Waters
IPC分类号： H04L7/00
CPC分类号： H04L25/03242 , H04L27/2647 , H04L2025/03426
摘要： Embodiments provide systems and methods for improved multiple-input, multiple-output (MIMO) detection comprising generating at least one list of candidate vectors by employing lattice enumeration which approximates hyperellipsoid detection search space and calculating a reliability of the candidate vectors. At least one advantage to embodiments is that improved detection occurs because detection can be performed in a search space defined by the eigenvectors (which define the general shape of an ellipsoid/hyperellipsoid, depending upon number of dimensions) and eigenvalues (which provide the appropriate scaling in each direction of the eigenvectors) of the effective channel.
摘要翻译：实施例提供了用于改进多输入多输出（MIMO）检测的系统和方法，包括通过采用接近超声检测搜索空间并计算候选向量的可靠性的点阵列表来生成候选向量的至少一个列表。对于实施例的至少一个优点是发生改进的检测，因为检测可以在由特征向量定义的搜索空间中执行（其定义为椭圆体的一般形状/取决于维数）和特征值（其提供适当的缩放在特征向量的每个方向上）有效信道。

9. 发明申请

US20080181322A1 SYSTEMS AND METHODS FOR HYBRID-MIMO EQUALIZATION 有权
标题翻译：用于混合MIMO均衡的系统和方法
公开(公告)号：US20080181322A1
公开(公告)日：2008-07-31
申请号：US12022307
申请日：2008-01-30
申请人： Deric W. Waters , Anuj Batra , Srinath Hosur
发明人： Deric W. Waters , Anuj Batra , Srinath Hosur
IPC分类号： H04L27/28 , G06F17/16
CPC分类号： H04L25/03006 , H04L2025/03414 , H04L2025/03426 , H04L2025/03605
摘要： Embodiments provide systems and methods for a novel multiple-input multiple-output (MIMO) equalization technique that produces a channel matrix that contains partly real coefficients and partly complex coefficients, referred to herein as a hybrid-MIMO equalization. MIMO detectors can exploit the hybrid-MIMO equalization to reduce complexity. Some embodiments provide systems and methods for equalizing a communication channel comprising receiving as an input a channel output vector, dividing the input into two vectors, a first vector that remains a complex number and a second vector that contains only real numbers, separating the second vector into its real and imaginary components, and regrouping the first and second vectors into a hybrid channel output vector that contains both real and complex coefficients.
摘要翻译：实施例提供了一种新颖的多输入多输出（MIMO）均衡技术的系统和方法，其产生包含部分实系数和部分复系数的信道矩阵，这里称为混合MIMO均衡。 MIMO检测器可以利用混合MIMO均衡来降低复杂度。一些实施例提供用于均衡通信信道的系统和方法，包括：接收作为输入的信道输出向量，将输入划分成两个向量，保留复数的第一向量和仅包含实数的第二向量，将第二向量转换成其实部和虚部，并将第一和第二矢量重新分组成包含实数和复系数的混合信道输出向量。

10. 发明授权

US09103916B2 Apparatus and method for indoor positioning 有权
标题翻译：室内定位装置及方法
公开(公告)号：US09103916B2
公开(公告)日：2015-08-11
申请号：US13462386
申请日：2012-05-02
申请人： Deric W. Waters , Jayawardan Janardhanan
发明人： Deric W. Waters , Jayawardan Janardhanan
IPC分类号： G01S19/48
CPC分类号： G01S19/48 , G01S5/0252 , G01S5/0263 , G01S5/14 , G01S19/03 , G01S19/46
摘要： Apparatus and method for positioning a wireless device. In one embodiment, a method for indoor positioning includes determining a reference location of a wireless device, based on satellite positioning, as the device passes between areas of satellite positioning signal reception and satellite positioning signal non-reception. While in the areas of non-reception, signals transmitted by wireless local area network (WLAN) access points (APs) and parameters of motion of the device are measured. Positions of the device are estimated while in the areas of non-reception based on the reference location and the parameters of motion. A positioning grid for positioning is generated based on the signals measured by the wireless device at the estimated positions.
摘要翻译：用于定位无线设备的装置和方法。在一个实施例中，一种用于室内定位的方法包括当卫星定位信号接收和卫星定位信号不接收的区域之间经过卫星定位时，确定无线设备的参考位置。在不接收的区域中，测量由无线局域网（WLAN）接入点（AP）发送的信号和设备的运动参数。在基于参考位置和运动参数的不接收的区域中估计设备的位置。基于由无线设备在估计位置测量的信号产生用于定位的定位网格。

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