-
公开(公告)号：US20100260234A1
公开(公告)日：2010-10-14
申请号：US12421573
申请日：2009-04-09
IPC分类号： H04B1/707
CPC分类号： H04L1/0026 , H04B1/7103 , H04B7/0417 , H04B7/066 , H04B2201/70702 , H04B2201/709709 , H04J13/0003 , H04L1/1607 , H04L5/0053 , H04L5/0057 , H04L25/0206 , H04L25/021 , H04L25/0228 , H04L25/0248 , H04L25/03343 , H04L27/2626 , H04L2025/03414 , H04L2025/03426 , H04L2025/03808 , H04L2025/03815
摘要： Channel information feedback takes place by calculating channel information to feed back to the base station. The channel quality information is spread by a remote unit with spreading codes from mutually unbiased bases and transmitted to the base station. The advantages of spreading the feedback channel are that multiple mobiles can send their feedback on the same time-frequency resources making the feedback very efficient and also improving feedback performance through orthogonal spreading which gives a spreading gain above noise and interference. Using the spreading codes from mutually unbiased bases can reduce interference across sectors.
摘要翻译： 信道信息反馈通过计算信道信息反馈给基站进行。 信道质量信息由具有来自相互无偏置的基站的扩展码的远程单元传播并被发送到基站。 扩展反馈信道的优点是，多个移动台可以在相同的时间 - 频率资源上发送其反馈，从而使得该反馈非常有效，并且还通过正交扩频来提高反馈性能，其给出高于噪声和干扰的扩频增益。 使用来自相互无偏的基地的扩展码可以减少扇区之间的干扰。
-
2.发明授权公开(公告)号：US07778343B2
公开(公告)日：2010-08-17
申请号：US11627563
申请日：2007-01-26
申请人： William J. Hillery , Thomas P. Krauss , Bishwarup Mondal , Timothy A. Thomas , Frederick W. Vook
发明人： William J. Hillery , Thomas P. Krauss , Bishwarup Mondal , Timothy A. Thomas , Frederick W. Vook
CPC分类号： H04L5/0007 , H04B7/0671
摘要： A generalized form of cyclic shift diversity is described for use in an OFDM system with multiple transmit antennas. Multiple cyclic shifts are performed for each transmit antenna and the shifted signals are scaled and summed to form a time-domain data stream for each transmit antenna. A cyclic extension is added to each data stream prior to transmission.
摘要翻译： 描述了在具有多个发射天线的OFDM系统中使用的循环移位分集的通用形式。 对于每个发射天线执行多个循环移位，并且移位的信号被缩放和相加以形成每个发射天线的时域数据流。 在传输之前，将循环扩展添加到每个数据流。
-
3.发明授权公开(公告)号：US08391173B2
公开(公告)日：2013-03-05
申请号：US12776499
申请日：2010-05-10
申请人： Mark C. Cudak , Amitabha Ghosh , William J. Hillery , Bishwarup Mondal , Anup K. Talukdar , Eugene Visotsky , Frederick W. Vook , Fan Wang
发明人： Mark C. Cudak , Amitabha Ghosh , William J. Hillery , Bishwarup Mondal , Anup K. Talukdar , Eugene Visotsky , Frederick W. Vook , Fan Wang
IPC分类号： H04W4/00
CPC分类号： H04W16/02 , H04L5/0007 , H04L5/0023 , H04L5/0039 , H04L5/0041 , H04L5/0094 , H04W28/16
摘要： In an OFDM communication system, wherein a frequency bandwidth is divided into multiple Physical Resource Units (PRUs), a Frequency Partitioning Configuration Module (FPCM) is provided that configures a physical layer for use in multiple coverage areas. The FPCM divides the PRUs into a first group, for frequency selective allocations, and a second group, for frequency diverse allocations. The FPCM subdivides each of the two groups into multiple sets of PRUs, maps the sets of PRUs from the first group to consecutive PRUs allocated for contiguous segment allocation (CS-PRUs), and maps the sets of PRUs from the second group to consecutive PRUs allocated for distributed segment allocation (DS-PRUs). The FPCM permutes the DS-PRUs and allocates the CS-PRUs and the permuted DS-PRUs to at least one frequency partition.
摘要翻译： 在其中将频率带宽划分为多个物理资源单元（PRU）的OFDM通信系统中，提供了配置用于多个覆盖区域的物理层的频率分配配置模块（FPCM）。 FPCM将PRU划分为第一组，用于频率选择性分配，第二组用于频率不同的分配。 FPCM将两组中的每一个细分为多组PRU，将来自第一组的PRU集合映射到为连续分段分配（CS-PRU）分配的连续PRU，并将来自第二组的PRU集合映射到连续PRU 分配给分布式分段分配（DS-PRU）。 FPCM将DS-PRU置换并将CS-PRU和置换的DS-PRU分配给至少一个频率分区。
-
4.发明申请公开(公告)号：US20080181191A1
公开(公告)日：2008-07-31
申请号：US11627563
申请日：2007-01-26
申请人： William J. Hillery , Thomas P. Krauss , Bishwarup Mondal , Timothy A. Thomas , Frederick W. Vook
发明人： William J. Hillery , Thomas P. Krauss , Bishwarup Mondal , Timothy A. Thomas , Frederick W. Vook
IPC分类号： H04H1/00
CPC分类号： H04L5/0007 , H04B7/0671
摘要： A generalized form of cyclic shift diversity is described for use in an OFDM system with multiple transmit antennas. Multiple cyclic shifts are performed for each transmit antenna and the shifted signals are scaled and summed to form a time-domain data stream for each transmit antenna. A cyclic extension is added to each data stream prior to transmission.
摘要翻译： 描述了在具有多个发射天线的OFDM系统中使用的循环移位分集的通用形式。 对于每个发射天线执行多个循环移位，并且移位的信号被缩放和相加以形成每个发射天线的时域数据流。 在传输之前，将循环扩展添加到每个数据流。
-
5.发明申请公开(公告)号：US20100284482A1
公开(公告)日：2010-11-11
申请号：US12776499
申请日：2010-05-10
申请人： Mark C. Cudak , Amitabha Ghosh , William J. Hillery , Bishwarup Mondal , Anup K. Talukdar , Eugene Visotsky , Frederick W. Vook , Fan Wang
发明人： Mark C. Cudak , Amitabha Ghosh , William J. Hillery , Bishwarup Mondal , Anup K. Talukdar , Eugene Visotsky , Frederick W. Vook , Fan Wang
IPC分类号： H04L5/12
CPC分类号： H04W16/02 , H04L5/0007 , H04L5/0023 , H04L5/0039 , H04L5/0041 , H04L5/0094 , H04W28/16
摘要： In an OFDM communication system, wherein a frequency bandwidth is divided into multiple Physical Resource Units (PRUs), a Frequency Partitioning Configuration Module (FPCM) is provided that configures a physical layer for use in multiple coverage areas. The FPCM divides the PRUs into a first group, for frequency selective allocations, and a second group, for frequency diverse allocations. The FPCM subdivides each of the two groups into multiple sets of PRUs, maps the sets of PRUs from the first group to consecutive PRUs allocated for contiguous segment allocation (CS-PRUs), and maps the sets of PRUs from the second group to consecutive PRUs allocated for distributed segment allocation (DS-PRUs). The FPCM permutes the DS-PRUs and allocates the CS-PRUs and the permuted DS-PRUs to at least one frequency partition.
摘要翻译： 在其中将频率带宽划分为多个物理资源单元（PRU）的OFDM通信系统中，提供了配置用于多个覆盖区域的物理层的频率分配配置模块（FPCM）。 FPCM将PRU划分为第一组，用于频率选择性分配，第二组用于频率不同的分配。 FPCM将两组中的每一个细分为多组PRU，将来自第一组的PRU集合映射到为连续分段分配（CS-PRU）分配的连续PRU，并将来自第二组的PRU集合映射到连续PRU 分配给分布式分段分配（DS-PRU）。 FPCM将DS-PRU置换并将CS-PRU和置换的DS-PRU分配给至少一个频率分区。
-
公开(公告)号：US20120147813A1
公开(公告)日：2012-06-14
申请号：US12965949
申请日：2010-12-13
申请人： Eugene Visotsky , Mark C. Cudak , William J. Hillery , Arvind Krishnamoorthy , Bishwarup Mondal , Frederick W. Vook
发明人： Eugene Visotsky , Mark C. Cudak , William J. Hillery , Arvind Krishnamoorthy , Bishwarup Mondal , Frederick W. Vook
IPC分类号： H04W4/00
CPC分类号： H04B7/0623 , H04B7/024 , H04B7/0417 , H04B7/0626 , H04B7/0634 , H04B7/0639 , H04B7/0669 , H04B7/0671 , H04L5/0023 , H04L5/0035 , H04L5/0053
摘要： During operation, the choice of the initial ranging code (sometimes referred to as a ranging preamble code, or a random-access preamble) at the mobile station is associated with a PMI feedback to be signaled to the base station during the initial ranging. More particularly, during initial system access a ranging code is transmitted by the mobile station to the base station. The mobile station chooses one of the available ranging codes based on the channel conditions and associates the ranging code with channel feedback information. The ranging code is then transmitted to the base station, and provides the base station with the channel feedback information.
摘要翻译： 在操作期间，移动站处的初始测距码（有时称为测距前导码或随机接入前同步码）的选择与在初始测距期间向基站发信号通知的PMI反馈相关联。 更具体地，在初始系统接入期间，测距码由移动台发送到基站。 移动台基于信道条件选择可用的测距码之一，并将测距码与信道反馈信息相关联。 然后将测距码发送到基站，并向基站提供信道反馈信息。
-
7.发明授权Decision feedback equalizers with constrained feedback taps for reduced error propagation 有权具有约束反馈抽头的判决反馈均衡器，用于减少误差传播公开(公告)号：US07313182B2
公开(公告)日：2007-12-25
申请号：US10804706
申请日：2004-03-19
IPC分类号： H03H7/40
CPC分类号： H04L25/03057 , H04L2025/0349 , H04L2025/03605 , H04L2025/03681
摘要： Constrained tap weights of a decision feedback equalizer are determined according to the channel impulse response of a channel and a constraint function. The constraint function is differentiable and is an approximation of a non-differentiable tap weight constraint function. The tap weight constraint function may have a constraint value M that is a function of a mean squared error of the estimated mean squared error at the output of the decision feedback equalizer.
摘要翻译： 根据信道的信道脉冲响应和约束函数确定判决反馈均衡器的约束抽头权重。 约束函数是可微分的，并且是不可微分的抽头权重约束函数的近似。 抽头权重约束函数可以具有作为判决反馈均衡器的输出处的估计均方误差的均方误差的函数的约束值M。
-
公开(公告)号：US06178201B1
公开(公告)日：2001-01-23
申请号：US09038656
申请日：1998-03-11
申请人： William J. Hillery
发明人： William J. Hillery
IPC分类号： H03H730
CPC分类号： H04L25/03019 , H03H21/0012 , H04L2025/03535 , H04L2025/0363
摘要： An adaptive equalizer for a demodulator includes a filter that generates a filter output signal in response to an information signal according to a transfer function for the filter. The adaptive equalizer includes means for adjusting the transfer function in response to an indication of error in the filter output signal, and means for switching among a set of differing determinations of the indication of error. Switching among the differing determinations may be based upon a variety of indications of the progress of adaptation in the equalizer.
摘要翻译： 用于解调器的自适应均衡器包括滤波器，该滤波器响应于根据滤波器的传递函数的信息信号产生滤波器输出信号。 自适应均衡器包括用于响应于滤波器输出信号中的误差的指示来调整传递函数的装置，以及用于在错误指示的一组不同确定之间进行切换的装置。 不同确定之间的切换可以基于均衡器中适应进展的各种指示。
-
公开(公告)号：US06859492B1
公开(公告)日：2005-02-22
申请号：US09698990
申请日：2000-10-27
申请人： William J. Hillery
发明人： William J. Hillery
CPC分类号： H04L25/03019 , H03H21/0012 , H04L2025/03535 , H04L2025/0363
摘要： An adaptive equalizer for a demodulator includes a filter that generates a filter output signal in response to an information signal according to a transfer function for the filter. The adaptive equalizer includes means for adjusting the transfer function in response to an indication of error in the filter output signal, and means for switching among a set of differing determinations of the indication of error. Switching among the differing determinations may be based upon a variety of indications of the progress of adaptation in the equalizer.
摘要翻译： 用于解调器的自适应均衡器包括滤波器，该滤波器响应于根据滤波器的传递函数的信息信号产生滤波器输出信号。 自适应均衡器包括用于响应于滤波器输出信号中的误差的指示来调整传递函数的装置，以及用于在错误指示的一组不同确定之间进行切换的装置。 不同确定之间的切换可以基于均衡器中适应进展的各种指示。
-
公开(公告)号：US6081822A
公开(公告)日：2000-06-27
申请号：US38082
申请日：1998-03-11
CPC分类号： G06F7/552
摘要： An electronic system with power approximation for circuit savings. Power approximation is provided by means for generating an absolute value of a real part of a signal, means for generating an absolute value of an imaginary part of the signal, means for generating a sum of the absolute values, and means for performing an averaging function on the sum such that a result of the averaging function provides an approximate power which indicates an actual power of the signal. The approximate power enables a determination of actual signal-to-noise ratio in the electronic system and a determination of a variety of other signal-to-noise determinations without the use of multipliers.
摘要翻译： 具有功率近似电路节省电子系统。 功率近似由用于产生信号的实部的绝对值的装置提供，用于产生信号的虚部的绝对值的装置，用于产生绝对值的和的装置，以及用于执行平均功能的装置 以使得平均功能的结果提供表示信号的实际功率的近似功率。 近似功率使得能够确定电子系统中的实际信噪比，以及确定各种其他信噪比确定，而不使用乘法器。
-
-
-
-
-
-
-
-
-
搜索结果
13 条记录 (耗时 0.024 秒)
