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61. 发明申请

US20110164557A1 METHOD AND SYSTEM FOR ITERATIVE DISCRETE FOURIER TRANSFORM (DFT) BASED CHANNEL ESTIMATION USING MINIMUM MEAN SQUARE ERROR (MMSE) TECHNIQUES 有权
标题翻译：使用最小平均误差（MMSE）技术的迭代离散傅里叶变换（DFT）基于信道估计的方法和系统
公开(公告)号：US20110164557A1
公开(公告)日：2011-07-07
申请号：US12732975
申请日：2010-03-26
申请人： Sirikiat Lek Ariyavisitakul , Jun Zheng
发明人： Sirikiat Lek Ariyavisitakul , Jun Zheng
IPC分类号： H04W4/00
CPC分类号： H04L25/0204 , H04L1/005 , H04L5/0005 , H04L25/0206 , H04L25/024 , H04L25/0242 , H04L2025/03611 , H04W24/00 , H04W84/12
摘要： A method and system for iterative discrete Fourier transform (DFT) based channel estimation using minimum mean square error (MMSE) techniques are presented. Aspects of the method and system include a procedure for computing channel estimates in both the time domain and frequency domain (or mixed domain) using an iterative DFT method based on MMSE techniques. One aspect of the method and system may achieve low computational complexity and produce more accurate channel estimate values in low signal to noise ratio (SNR) regimes in comparison to conventional DFT-based channel estimation methods, which utilize least squares (LS) techniques. The method and system disclosed herein may be practiced in connection with a wide range of orthogonal frequency division multiplexing (OFDM) based systems, for example wireless local area networks (WLAN, for example IEEE 802.11 WLAN systems), and LTE systems.
摘要翻译：提出了使用最小均方误差（MMSE）技术的基于迭代离散傅里叶变换（DFT）的信道估计的方法和系统。该方法和系统的方面包括使用基于MMSE技术的迭代DFT方法计算时域和频域（或混合域）中的信道估计的过程。与使用最小二乘（LS）技术的传统的基于DFT的信道估计方法相比，该方法和系统的一个方面可以实现低计算复杂度并且在低信噪比（SNR）方案中产生更准确的信道估计值。本文公开的方法和系统可以结合宽范围的基于正交频分复用（OFDM）的系统，例如无线局域网（WLAN，例如IEEE 802.11 WLAN系统）和LTE系统来实施。

62. 发明申请

US20110164510A1 METHOD AND SYSTEM FOR SELECTING A USER GROUP USING QUANTIZED CHANNEL STATE INFORMATION FEEDBACKS FROM MIMO CAPABLE MOBILE DEVICES 审中-公开
标题翻译：使用来自MIMO能力移动设备的量化信道状态信息反馈选择用户组的方法和系统
公开(公告)号：US20110164510A1
公开(公告)日：2011-07-07
申请号：US12652124
申请日：2010-01-05
申请人： Jun Zheng , Mark Kent , Vinko Erceg
发明人： Jun Zheng , Mark Kent , Vinko Erceg
IPC分类号： H04B15/00 , H04L12/26 , H04W4/00
CPC分类号： H04B7/0626 , H04W72/0406 , H04W72/08 , H04W72/121
摘要： A mobile device estimates channel status information (CSI) for an associated single user downlink multiple-input multiple-output (MIMO) channel. The estimated CSI is quantized using a finite quantization resolution. The quantized CSI is communicated to the base station over a finite-rate feedback channel. Intended downlink data transmission is scheduled by the base station according to the transmitted CSI, and received by the mobile device, accordingly. The estimated CSI comprise generalized channel quality information such as channel capacity and channel direction. The base station selects a first user having a strongest channel capacity according to quantized CSI received from associated mobile devices. Beams orthogonal to a single user downlink MIMO channel of the selected first user are broadcasted. Quantized relative channel direction matrices and projected channel capacity are received from remaining mobile devices. A user having a strongest projected channel capacity is selected a second user for the user group.
摘要翻译：移动设备估计用于相关联的单用户下行链路多输入多输出（MIMO）信道的信道状态信息（CSI）。使用有限量化分辨率对估计的CSI进行量化。量化的CSI通过有限速率反馈信道传送到基站。相应地，预定的下行链路数据传输由基站根据发送的CSI调度并由移动设备接收。估计的CSI包括广播信道质量信息，例如信道容量和信道方向。基站根据从相关联的移动设备接收到的量化CSI来选择具有最强信道容量的第一用户。广播与所选择的第一用户的单个用户下行链路MIMO信道正交的光束。从剩余的移动设备接收量化的相对信道方向矩阵和投影信道容量。为用户组选择具有最强投影通道容量的用户的第二用户。

63. 发明授权

US07953138B2 Method and system for an efficient channel quantization method for MIMO pre-coding systems 有权
标题翻译：用于MIMO预编码系统的有效信道量化方法的方法和系统
公开(公告)号：US07953138B2
公开(公告)日：2011-05-31
申请号：US12910485
申请日：2010-10-22
申请人： Mark Kent , Vinko Erceg , Jun Zheng
发明人： Mark Kent , Vinko Erceg , Jun Zheng
IPC分类号： H04L27/30
CPC分类号： H04L5/143 , H04B7/0417 , H04B7/0639 , H04L25/0204 , H04L25/03343 , H04L2025/03426 , H04L2025/03808
摘要： A method and system for processing communication signals is provided and may comprise, quantizing a channel estimate at a MIMO receiver onto a codebook based on a cost function, wherein the codebook comprises a plurality of unitary matrices. A codebook index may be fed back from the MIMO receiver to a MIMO transmitter, wherein the codebook index is associated with one of the plurality of unitary matrices that minimizes the cost function. The cost function may be minimized by choosing a smallest scalar cost from a plurality of scalar costs, wherein each one of the scalar costs is generated from one or more sums and one or more products of elements of a product matrix, and wherein the product matrix is generated from one of the plurality of unitary matrices, a matrix comprising the channel estimate, and their respective Hermitian Transposes.
摘要翻译：提供了一种用于处理通信信号的方法和系统，并且可以包括：基于成本函数将MIMO接收机处的信道估计量化到码本上，其中码本包括多个酉矩阵。码本索引可以从MIMO接收机反馈到MIMO发射机，其中，码本索引与使成本函数最小化的多个酉矩阵中的一个相关联。可以通过从多个标量成本中选择最小标量成本来最小化成本函数，其中每个标量成本是从产品矩阵的一个或多个和的乘积和一个或多个乘积的乘积产生的，并且其中产品矩阵从多个酉矩阵中的一个生成矩阵，包括信道估计的矩阵以及它们各自的厄米转移。

64. 发明申请

US20110103505A1 METHOD AND SYSTEM FOR A SIMPLIFIED USER GROUP SELECTION SCHEME WITH FINITE-RATE CHANNEL STATE INFORMATION FEEDBACK FOR FDD MULTIUSER MIMO DOWNLINK TRANSMISSION 有权
标题翻译：用于FDD MULTIUSER MIMO下行链路传输的简化用户组选择方案和有限速率信道状态信息反馈的方法和系统
公开(公告)号：US20110103505A1
公开(公告)日：2011-05-05
申请号：US12917841
申请日：2010-11-02
申请人： Jun Zheng , Chengjin Zhang , Pieter van Rooyen
发明人： Jun Zheng , Chengjin Zhang , Pieter van Rooyen
IPC分类号： H04L27/28
CPC分类号： H04B7/0452 , H04B7/0417 , H04B7/0626 , H04B7/0643 , H04W52/42
摘要： A method for processing signals in a communication system includes selecting, from a plurality of users, a first user having a channel gain that is greater than a channel gain corresponding to a remaining portion of the plurality of users. At least a second user may be selected from a portion of the remaining portion of the plurality of users, based on a feedback channel gain of the second user. The selected second user may have a channel direction that is approximately orthogonal to a channel direction of the first user. System capacity may be determined based on the selecting of the first user and the selecting of the second user. The channel gain may be defined by a quantized channel gain. A quantized channel direction of the selected first user may be determined for the selecting of the second user.
摘要翻译：一种用于在通信系统中处理信号的方法包括从多个用户中选择具有大于与所述多个用户的剩余部分相对应的信道增益的信道增益的第一用户。可以基于第二用户的反馈信道增益从多个用户的剩余部分的一部分中选择至少第二用户。所选择的第二用户可以具有与第一用户的频道方向近似正交的频道方向。可以基于第一用户的选择和第二用户的选择来确定系统容量。信道增益可以由量化的信道增益来定义。可以确定所选择的第一用户的量化信道方向用于选择第二用户。

65. 发明申请

US20110070913A1 Method and System for a Range Reduction Scheme for User Selection in a Multiuser MIMO Downlink Transmission 有权
标题翻译：用于多用户MIMO下行链路传输中的用户选择的范围缩减方案的方法和系统
公开(公告)号：US20110070913A1
公开(公告)日：2011-03-24
申请号：US12951577
申请日：2010-11-22
申请人： Chengjin Zhang , Jun Zheng , Vinko Erceg , Severine Catreux-Erceg , Pieter Roux , Pieter van Rooyen
发明人： Chengjin Zhang , Jun Zheng , Vinko Erceg , Severine Catreux-Erceg , Pieter Roux , Pieter van Rooyen
IPC分类号： H04W28/02
CPC分类号： H04B7/0452 , H04B17/382 , H04W52/42
摘要： Various aspects of a method and a system for a range reduction scheme for user selection in a multiuser MIMO downlink transmission are presented. Aspects of a system for range reduction may comprise a range reduction processor that determines a plurality of channel measurements corresponding to a plurality of signals. The range reduction processor may compute a plurality of channel capacities based on the channel measurements corresponding to a subset of the plurality of signals having channel gain that is greater than a remaining portion of the plurality of signals. Aspects of a method may comprise determining a plurality of channel measurements corresponding to a plurality of signals, and computing a plurality of channel capacities based on said channel measurements corresponding to a subset of the plurality of signals having a channel gain that is greater than a remaining portion of the plurality of signals.
摘要翻译：提出了一种用于多用户MIMO下行链路传输中的用户选择的范围缩减方案的方法和系统的各个方面。用于范围缩小的系统的方面可以包括范围缩小处理器，其确定对应于多个信号的多个信道测量。范围缩小处理器可以基于与具有大于多个信号的剩余部分的信道增益的多个信号的子集相对应的信道测量来计算多个信道容量。方法的方面可以包括：确定对应于多个信号的多个信道测量，以及基于与多个信号的子集相对应的所述信道测量来计算多个信道容量，该信道测量具有大于剩余的信道增益的信道增益部分信号。

66. 发明授权

US07826416B2 Method and system for a simplified user group selection scheme with finite-rate channel state information feedback for FDD multiuser MIMO downlink transmission 有权
标题翻译：用于FDD多用户MIMO下行链路传输的有限速率信道状态信息反馈的简化用户组选择方案的方法和系统
公开(公告)号：US07826416B2
公开(公告)日：2010-11-02
申请号：US11232340
申请日：2005-09-21
申请人： Jun Zheng , Chengjin Zhang , Pieter van Rooyen
发明人： Jun Zheng , Chengjin Zhang , Pieter van Rooyen
IPC分类号： H04Q7/00 , H04B11/00 , H04M11/00
CPC分类号： H04B7/0452 , H04B7/0417 , H04B7/0626 , H04B7/0643 , H04W52/42
摘要： Certain embodiments of the invention may be found in a method and system for a simplified user group selection scheme with finite-rate channel state information feedback for frequency division duplex (FDD) multiuser multiple-input-multiple-output (MIMO) downlink transmission. Aspects of the method may include selecting, from a plurality of users, a first user having a channel gain that is greater than a channel gain corresponding to a remaining portion of the plurality of users. At least a second user may be selected from a portion of the remaining portion of the plurality of users. The selected at least the second user has a channel direction that may be approximately orthogonal to that of the first user. The channel gain may be defined by a quantized channel gain. A quantized channel direction of the selected first user may be determined for the selecting the at least the second user.
摘要翻译：可以在用于频分双工（FDD）多用户多输入多输出（MIMO）下行链路传输的有限速率信道状态信息反馈的简化用户组选择方案的方法和系统中找到本发明的某些实施例。该方法的方面可以包括从多个用户中选择具有大于与多个用户的剩余部分相对应的信道增益的信道增益的第一用户。可以从多个用户的剩余部分的一部分中选择至少第二用户。所选择的至少第二用户具有可以与第一用户的频道方向近似正交的频道方向。信道增益可以由量化的信道增益来定义。可以确定所选择的第一用户的量化信道方向用于选择至少第二用户。

67. 发明授权

US07822102B2 Method and system for an efficient channel quantization method for MIMO pre-coding systems 有权
标题翻译：用于MIMO预编码系统的有效信道量化方法的方法和系统
公开(公告)号：US07822102B2
公开(公告)日：2010-10-26
申请号：US11767158
申请日：2007-06-22
申请人： Mark Kent , Vinko Erceg , Jun Zheng
发明人： Mark Kent , Vinko Erceg , Jun Zheng
IPC分类号： H04L27/30
CPC分类号： H04B7/0417 , G06Q30/0283 , H04B7/0626 , H04B7/0639 , H04B7/0854
摘要： Aspects of a method and system for an efficient channel quantization method or MIMO pre-coding systems may include quantizing channel state information in a MIMO pre-coding system onto a codebook, which comprises one or more unitary matrices, using a cost function; selecting a quantization function that enables the quantizing based on a number of receive antennas and a number of transmit antennas associated with the MIMO pre-coding system; and selecting the cost function from a set of cost functions based on the number of receive antennas and the number of transmit antennas. The channel state information may be a matrix Ĥ. The set of cost functions may comprise function f(A), which may be defined by the following relationships: f ⁡ ( A ) = ∑ i = 1 N ⁢ ⁢ ∑ j = 1 , j ≠ i N ⁢ ⁢  a i , j  2 ⁢ ⁢ and / or ⁢ ⁢ f ⁡ ( A ) = ∑ i = 1 N ⁢ ⁢ ∑ j = 1 , j ≠ i N ⁢ ⁢  a i , j  2 - ∑ i = 1 N ⁢ ⁢ a i , i where A is a matrix of size N by N and aij is element (i,j) of matrix A.
摘要翻译：用于有效信道量化方法或MIMO预编码系统的方法和系统的方面可以包括：使用成本函数将MIMO预编码系统中的信道状态信息量化到包括一个或多个酉矩阵的码本上; 选择能够基于多个接收天线进行量化的量化函数和与MIMO预编码系统相关联的多个发射天线; 以及基于接收天线的数量和发射天线的数量从一组成本函数中选择成本函数。信道状态信息可以是矩阵Ĥ。一组成本函数可以包括函数f（A），其可以由以下关系定义：f⁡（A）=Σi = 1 N笨Σj = 1，j≠i Nüüai，j 庇2⁢or⁡⁡⁡⁡⁡ΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣ 其中A是N乘N的矩阵，aij是矩阵A的元素（i，j）。

68. 发明申请

US20100202165A1 Dynamic Drive of Switching Transistor of Switching Power Converter 有权
标题翻译：开关电源转换器开关晶体管的动态驱动
公开(公告)号：US20100202165A1
公开(公告)日：2010-08-12
申请号：US12678690
申请日：2007-09-28
申请人： Junjie Zheng , Jun Zheng , Andrew Kwok-Cheung Lee , John William Kesterson , Allan Ming-Lun Lin , Hien Huu Bui , Carrie Seim , Yong Li
发明人： Junjie Zheng , Jun Zheng , Andrew Kwok-Cheung Lee , John William Kesterson , Allan Ming-Lun Lin , Hien Huu Bui , Carrie Seim , Yong Li
IPC分类号： H02M3/335
CPC分类号： H02M3/33507 , H02M2001/0032 , H03K17/163 , H03K17/166 , Y02B70/16
摘要： A switching power converter comprises a transformer (110), a switch (108) coupled to the transformer (110), and a switch controller (200) coupled to the switch (108) for generating a switch drive signal (207) to turn on or off the switch (108). The drive current of the switch drive signal (207) is adjusted dynamically according to line or load conditions within a switching cycle and/or over a plurality of switching cycles. The magnitude of the drive current can be dynamically adjusted within a switching cycle and/or over a plurality of switching cycles, in addition to the pulse widths or pulse frequencies of the drive current.
摘要翻译：开关电源转换器包括变压器（110），耦合到变压器（110）的开关（108）和耦合到开关（108）的开关控制器（200），用于产生开关驱动信号（207）以导通或关闭开关（108）。开关驱动信号（207）的驱动电流根据开关周期内和/或多个开关周期中的线路或负载条件动态地调整。除了驱动电流的脉冲宽度或脉冲频率之外，驱动电流的大小可以在开关周期内和/或多个开关周期内动态地调节。

69. 发明申请

US20100158148A1 Double Search User Group Selection Scheme with Range Reduction for FDD Multiuser MIMO Downlink Transmission with Finite-Rate Channel State Information Feedback 有权
标题翻译：双重搜索用户组选择方案与FDD多用户MIMO下行链路传输与有限速率信道状态信息反馈的范围缩减
公开(公告)号：US20100158148A1
公开(公告)日：2010-06-24
申请号：US12631938
申请日：2009-12-07
申请人： Chengjin Zhang , Jun Zheng , Pieter van Rooyen
发明人： Chengjin Zhang , Jun Zheng , Pieter van Rooyen
IPC分类号： H04K1/10
CPC分类号： H04B7/0626 , H04B7/0408 , H04B7/0452 , H04B7/0617
摘要： Aspects of a double search user group selection scheme with range reduction for FDD multiuser MIMO downlink transmission with finite-rate channel state information feedback are provided. The method may comprise maximizing system capacity using feedback information for a plurality of signals in a frequency division duplex system to reduce a search range within which a group of signals having maximum channel gain are located. The feedback information may comprise quantized gain for the signals. Quantized channel direction for the signals within the reduced search range may be requested and received by the transmitter. One or two signals from the reduced search range that maximizes system capacity may be selected. The receivers associated with these signals may then be selected as the user group.
摘要翻译：提供了具有有限速率信道状态信息反馈的FDD多用户MIMO下行链路传输的范围缩小的双重搜索用户组选择方案。该方法可以包括使用频分双工系统中的多个信号的反馈信息来最大化系统容量，以减少具有最大信道增益的一组信号所在的搜索范围。反馈信息可以包括信号的量化增益。减少的搜索范围内的信号的量化信道方向可以由发射机请求和接收。可以选择使系统容量最大化的缩小搜索范围的一个或两个信号。然后可以选择与这些信号相关联的接收机作为用户组。

70. 发明申请

US20100104115A1 MICRO MAGNETIC SPEAKER DEVICE WITH BALANCED MEMBRANE 审中-公开
标题翻译：具有平衡膜的微型磁性扬声器装置
公开(公告)号：US20100104115A1
公开(公告)日：2010-04-29
申请号：US12361905
申请日：2009-01-29
申请人： Jun Zheng , Dadi Setiadi , Haiwen Xi , Insik Jin , Nurul Amin
发明人： Jun Zheng , Dadi Setiadi , Haiwen Xi , Insik Jin , Nurul Amin
IPC分类号： H04R25/00 , H04R1/00
CPC分类号： H04R1/00
摘要： A micro magnetic device with a micro magnetic speaker unit having a first element, a second element, and a membrane therebetween. Each of the elements comprises a body, a pole of soft magnetic material, an electrically conductive coil positioned around the pole, and a permanent magnet connected to the membrane. The first element and the second element are magnetically identical. A plurality of speaker units can be combined to provide a speaker array.
摘要翻译：具有微型磁性扬声器单元的微型磁性装置具有第一元件，第二元件和它们之间的隔膜。每个元件包括主体，软磁材料的极，围绕极的定位的导电线圈和连接到膜的永磁体。第一元件和第二元件是磁性相同的。可以组合多个扬声器单元以提供扬声器阵列。

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