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公开(公告)号：US08811331B2
公开(公告)日：2014-08-19
申请号：US12420404
申请日：2009-04-08
CPC分类号： H04L5/0048 , H04L5/0007 , H04L5/005 , H04L5/0051 , H04L27/2613 , H04W72/0446
摘要： A multi-pilot frame handler (36) of a radio access network node (28) is arranged to prepare a block of a frame of information to include a first pilot signal of a pilot signal first type and a first pilot signal of a pilot signal second type. The pilot signal of the pilot signal first type is expressed as a first Costas array base pattern of resource elements of the block; the pilot signal of the second type is expressed as a second Costas array base pattern of resource elements of the block. The multi-pilot frame handler (36) is arranged to prepare the block so that any pilot signal of the pilot signal first type is carried by at least some subcarriers of a first set of subcarriers of the block and any pilot signal of the pilot signal second type is carried by at least some subcarriers of a second set of subcarriers of the block.
摘要翻译： 布置无线电接入网络节点（28）的多导频帧处理器（36）以准备信息帧的块，以包括导频信号第一类型的第一导频信号和导频信号的第一导频信号 第二种。 导频信号第一类型的导频信号被表示为块的资源元素的第一个科斯塔斯阵列基本模式; 第二类型的导频信号被表示为块的资源元素的第二个科斯塔斯阵列基本模式。 多导频帧处理器（36）被布置为准备该块，使得导频信号第一类型的任何导频信号由块的第一组子载波的至少一些子载波和导频信号的任何导频信号 第二类型由块的第二组子载波的至少一些子载波承载。
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公开(公告)号：US08634357B2
公开(公告)日：2014-01-21
申请号：US12740385
申请日：2007-10-30
申请人： Jiann-Ching Guey , Kambiz C. Zangi
发明人： Jiann-Ching Guey , Kambiz C. Zangi
摘要： A wireless communication network employs a distributed antenna system to provide radio coverage. The wireless communication network comprises a plurality of access points providing service in respective coverage areas. The access point within each coverage area connects to a plurality of antennas that are widely distributed within the coverage area. Radio resources at antennas within the overlapping region of two or more neighboring coverage areas are shared by the access points in the neighboring coverage areas according to a multiple access scheme. The sharing of radio resources within the overlapping region of two or more coverage areas allows the overlapping region to be enlarged, thereby providing more time to complete a handover.
摘要翻译： 无线通信网络采用分布式天线系统来提供无线覆盖。 无线通信网络包括在相应覆盖区域中提供服务的多个接入点。 每个覆盖区域内的接入点连接到广泛分布在覆盖区域内的多个天线。 根据多址方案，在两个或多个相邻覆盖区域的重叠区域内的天线处的无线电资源由相邻覆盖区域中的接入点共享。 在两个或多个覆盖区域的重叠区域内的无线电资源的共享允许重叠区域被扩大，从而提供更多的时间来完成切换。
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公开(公告)号：US20130121246A1
公开(公告)日：2013-05-16
申请号：US13659310
申请日：2012-10-24
IPC分类号： H04W56/00
CPC分类号： H04W56/001 , H04L27/2657 , H04L27/2662 , H04L27/2675 , H04L27/2686 , H04W56/00 , H04W56/0035
摘要： According to exemplary embodiments of the invention, timing and frequency offset estimation is divided into two or more stages. In each stage, a different subset of the available reference symbols is selected to perform timing synchronization, frequency synchronization, or joint timing and frequency synchronization. In each non-final stage, a respective set of the reference symbols is used to perform timing synchronization or frequency synchronization in order to narrow the uncertainty window for the timing or frequency offset, and thus reduce the search space for the final stage. In the final stage, a different set of reference symbols may be used to perform joint timing and frequency synchronization over the reduced search space.
摘要翻译： 根据本发明的示例性实施例，定时和频率偏移估计被分为两个或多个阶段。 在每个阶段中，选择可用参考符号的不同子集以执行定时同步，频率同步或联合定时和频率同步。 在每个非最后阶段中，使用相应的参考符号组来执行定时同步或频率同步，以便缩小定时或频率偏移的不确定性窗口，从而减少最终级的搜索空间。 在最后阶段，可以使用不同的参考符号集来在减少的搜索空间上执行联合定时和频率同步。
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公开(公告)号：US08295311B2
公开(公告)日：2012-10-23
申请号：US12438623
申请日：2006-09-11
申请人： Jiann-Ching Guey
发明人： Jiann-Ching Guey
IPC分类号： H04J3/06
CPC分类号： H04L27/2657 , H04L5/0007 , H04L5/0048
摘要： The present invention relates to a method for detecting a pilot pattern, comprising a pilot signal sp(t), in a received signal r(t) implemented in an Orthogonal Frequency Division Multiplexing (OFDM) system. The method comprises the steps: computing a value of a log-likelihood function (τ0,ν0) for a hypotheses space specified by the pilot signal sp(t) and an initial time frequency offset (τ0,ν0), and relating the computed value to a reference value to detect the pilot pattern.
摘要翻译： 本发明涉及一种用于检测导频模式的方法，包括在正交频分复用（OFDM）系统中实现的接收信号r（t）中的导频信号sp（t）。 该方法包括以下步骤：对由导频信号sp（t）指定的假设空间和初始时间频率偏移（τ0，＆ngr; 0）计算对数似然函数（τ0，＆ngr; 0）的值，以及 将所计算的值与参考值相关联以检测导频模式。
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公开(公告)号：US20120033754A1
公开(公告)日：2012-02-09
申请号：US13277754
申请日：2011-10-20
申请人： Havish Koorapaty , Jiann-Ching Guey
发明人： Havish Koorapaty , Jiann-Ching Guey
CPC分类号： H04L5/0048 , H04L25/0226 , H04L25/0232
摘要： Smaller patterns of regularly-spaced pilot symbols are discerned from a larger pattern of irregularly-spaced pilot symbols transmitted in the time-frequency domain. Accordingly, the irregularly-spaced pilot symbols can be partitioned into at least two different groups of regularly-spaced pilot symbols in the time-frequency domain. Each group of regularly-spaced pilot symbols is individually processed with lower complexity and the results combined to generate an accurate time-frequency channel response estimate. According to an embodiment, a set of irregularly-spaced pilot symbols is transmitted over a time-frequency window. Channel response is estimated based on the pilot symbols by grouping the pilot symbols into subsets of regularly-spaced pilot symbols. An intermediate quantity is generated for each subset of regularly-spaced pilot symbols as a function of the pilot symbols included in the subset. The channel response is estimated over the time-frequency window as a function of the intermediate quantities.
摘要翻译： 从时频域中发送的不规则间隔的导频符号的较大模式可以看出较小的规则间隔导频符号模式。 因此，不规则间隔的导频符号可以被划分成时频域中的至少两个不同的规则间隔的导频符号组。 每组规则间隔的导频符号以较低的复杂度进行单独处理，并且结果组合以产生准确的时频信道响应估计。 根据实施例，在时间 - 频率窗口上发送一组不规则间隔的导频符号。 通过将导频符号分组成规则间隔的导频符号的子集，基于导频符号来估计信道响应。 根据包括在该子集中的导频符号的函数，为规则间隔的导频符号的每个子集生成中间量。 在时间 - 频率窗口上估计信道响应作为中间量的函数。
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公开(公告)号：US20110256901A1
公开(公告)日：2011-10-20
申请号：US12760521
申请日：2010-04-14
申请人： Jiann-Ching Guey
发明人： Jiann-Ching Guey
IPC分类号： H04B7/00
CPC分类号： H04W52/242 , H04B7/024 , H04W52/265 , H04W52/267
摘要： A Coordinated Multipoint (CoMP) controller advantageously reduces the transmit powers of transmissions coordinated across a plurality of sub-cells within a CoMP cell. The CoMP controller determines serving sub-cell path gains and interfering sub-cell path gains for a set of mobile terminals to be served by distinct sub-cells. The CoMP controller then evaluates an objective function that expresses an aggregate throughput of concurrent transmissions to be sent to or received from the set of mobile terminals as a function of the serving sub-cell path gains, the interfering sub-cell path gains, and the individual transmit powers of those transmissions, to determine the combination of individual transmit powers that maximizes the aggregate throughput while meeting minimum quality of service requirements for the mobile terminals. The combination of individual transmit powers will necessarily require less power than if the concurrent transmissions were each sent at maximum transmit power.
摘要翻译： 协调多点（CoMP）控制器有利地减少协调在CoMP小区内的多个子小区的传输的发射功率。 CoMP控制器确定由不同的子小区服务的一组移动终端的服务子小区路径增益和干扰子小区路径增益。 然后，CoMP控制器评估一个目标函数，该目标函数表示作为服务子小区路径增益，干扰子小区路径增益，和干扰子小区路径增益的函数发送到或从该组移动终端接收的并发传输的总吞吐量 确定这些传输的各个发射功率，以确定最大化总吞吐量同时满足移动终端的最低服务质量要求的各个发射功率的组合。 单个发射功率的组合必须比每个以最大发射功率发送并发传输的功率要少。
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公开(公告)号：US08027329B2
公开(公告)日：2011-09-27
申请号：US11672084
申请日：2007-02-07
申请人： Abdulrauf Hafeez , Jiann-Ching Guey
发明人： Abdulrauf Hafeez , Jiann-Ching Guey
IPC分类号： H04Q7/00
CPC分类号： H04B1/7083 , H04B1/7077 , H04B2201/70702 , H04L27/2613 , H04L27/2659 , H04L27/266 , H04L27/2662
摘要： A method of synchronizing signals in a wireless network uses a two part preamble transmitted on the downlink between a base station and a mobile station. The preamble includes a common pilot common to a plurality of base stations and a dedicated pilot unique to the transmitting base station. The mobile station performs coarse synchronization based on the common pilot and fine synchronization based on the dedicated pilot. The mobile station also identifies one or more nearby cells based on unique pilot tones in the dedicated pilot transmitted by the nearby cells.
摘要翻译： 在无线网络中同步信号的方法使用在基站和移动站之间的下行链路上发送的两部分前导码。 前导码包括多个基站共同的公共导频和发送基站唯一的专用导频。 移动台基于专用导频基于公共导频和精细同步来执行粗略同步。 移动台还基于由附近小区发送的专用导频中的唯一导频音来识别一个或多个相邻小区。
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88.发明申请公开(公告)号：US20100278047A1
公开(公告)日：2010-11-04
申请号：US12698798
申请日：2010-02-02
申请人： Havish Koorapaty , Jiann-Ching Guey
发明人： Havish Koorapaty , Jiann-Ching Guey
CPC分类号： H04W36/385 , H04L5/0007 , H04L25/0204 , H04L25/0224
摘要： A system, method and node of implementing interference suppression for estimation of a signal parameter of a base station transmission at a User Equipment (UE) in a telecommunications network with irregular reference signal patterns assigned to base stations. A list of base stations for which a parameter of the transmitted signal is to be estimated and a list of OFDM symbols and subcarriers to avoid for each base station are compiled. The compiled list is sent to the UE, which performs measurements for each base station using the received measurement information and simple interference avoidance is performed utilizing OFDM symbols and subcarriers not on the list of OFDM symbols and subcarriers to avoid. The measurements are then sent to the network.
摘要翻译： 一种用于估计在分配给基站的不规则参考信号模式的电信网络中的用户设备（UE）处的基站传输的信号参数的干扰抑制的系统，方法和节点。 对要发送的信号的参数要被估计的基站的列表和针对每个基站避免的OFDM符号和子载波的列表进行编译。 编译列表被发送到UE，其使用所接收的测量信息来执行每个基站的测量，并且使用不在OFDM符号和子载波的列表上的OFDM符号和子载波来执行简单的干扰避免。 然后将测量值发送到网络。
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公开(公告)号：US20100238787A1
公开(公告)日：2010-09-23
申请号：US12438623
申请日：2006-09-11
申请人： Jiann-Ching Guey
发明人： Jiann-Ching Guey
IPC分类号： H04J1/00
CPC分类号： H04L27/2657 , H04L5/0007 , H04L5/0048
摘要： The present invention relates to a method for detecting a pilot pattern, comprising a pilot signal sp(t), in a received signal r(t) implemented in an Orthogonal Frequency Division Multiplexing (OFDM) system. The method comprises the steps: computing a value of a log-likelihood function (τ0,ν0) for a hypotheses space specified by the pilot signal sp(t) and an initial time frequency offset (τ0,ν0), and relating the computed value to a reference value to detect the pilot pattern.
摘要翻译： 本发明涉及一种用于检测导频模式的方法，包括在正交频分复用（OFDM）系统中实现的接收信号r（t）中的导频信号sp（t）。 该方法包括以下步骤：对由导频信号sp（t）指定的假设空间和初始时间频率偏移（τ0，＆ngr; 0）计算对数似然函数（τ0，＆ngr; 0）的值，以及 将所计算的值与参考值相关联以检测导频模式。
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公开(公告)号：US20100167717A1
公开(公告)日：2010-07-01
申请号：US12346358
申请日：2008-12-30
摘要： Multipoint wireless communications are coordinated in cells with radiation that is emanated from antennas in an inward direction. In an example embodiment, an apparatus includes a first antenna, a second antenna, a third antenna and a controller. The first antenna emanates radiation from a first location in an inwardly direction for a cell. The second antenna emanates radiation from a second location in an inwardly direction for the cell. The third antenna emanates radiation from a third location in an inwardly direction for the cell. The controller coordinates the emanation of the radiation via the first, second, and third antennas so as to reduce intra-cell interference for remote terminals located within the cell. The coordination may be effected in accordance with one or more coordinated multi-point (transmission/reception) (CoMP) techniques. Different numbers of sub-cells and antennas per cell and different CoMP cell organizations may be implemented.
摘要翻译： 多点无线通信在具有向内方向上从天线发出的辐射的小区中协调。 在示例实施例中，一种装置包括第一天线，第二天线，第三天线和控制器。 第一天线从单元的向内方向的第一位置发出辐射。 第二天线从小区的向内方向的第二位置发射辐射。 第三天线从单元的内向的第三位置发出辐射。 控制器通过第一，第二和第三天线来协调辐射的发射，以便减少位于小区内的远程终端的小区内干扰。 协调可以根据一个或多个协调的多点（发送/接收）（CoMP）技术来实现。 可以实现每个细胞和不同CoMP细胞组织的不同数量的子细胞和天线。
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