专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US07433418B1 Method and apparatus for efficient storage of training sequences for peak to average power constrained modulation formats 有权
标题翻译：用于有效存储训练序列的峰值与平均功率约束调制格式的方法和装置
公开(公告)号：US07433418B1
公开(公告)日：2008-10-07
申请号：US09967208
申请日：2001-09-28
申请人： Mithat C. Dogan , Mitchell D. Trott
发明人： Mithat C. Dogan , Mitchell D. Trott
IPC分类号： H04B15/00
CPC分类号： H04J13/00 , H04B2201/70706 , H04L27/2613 , H04W52/262
摘要： Some embodiments store a training sequence in a communications system. The stored training sequence exhibits certain desirable characteristics when used by a peak to average power constrained modulation format. In one embodiment, a set of original ordered sequences is selected to have at least one desired property. A set of extended sequences is created from the original sequences by beginning with an element of an original sequence and cyclically appending elements of the original sequence in order to obtain a desired extended sequence length. Each extended sequence is modified using a corresponding modifying sequence, such that a training sequence can be generated from any one of the modified extended sequences. Each modifying sequence is selected so that the generated training sequence when modulated by a selected modulation format has the at least one desired property of the corresponding original ordered sequence.
摘要翻译：一些实施例将训练序列存储在通信系统中。存储的训练序列在由峰值对平均功率约束调制格式使用时呈现出一定的期望特性。在一个实施例中，选择一组原始有序序列以具有至少一个期望的属性。从原始序列创建一组扩展序列，从原始序列的元素开始，并循环地附加原始序列的元素，以获得期望的扩展序列长度。使用相应的修改序列修改每个扩展序列，使得可以从修改的扩展序列中的任一个产生训练序列。选择每个修改序列，使得当由选择的调制格式调制时产生的训练序列具有相应的原始有序序列的至少一个所需属性。

2. 发明授权

US07339981B2 Shifted training sequences in a communications system 有权
标题翻译：移动训练序列在通信系统中
公开(公告)号：US07339981B2
公开(公告)日：2008-03-04
申请号：US10191642
申请日：2002-07-09
申请人： Mithat C. Dogan
发明人： Mithat C. Dogan
IPC分类号： H04L7/00
CPC分类号： H04L25/0226
摘要： Embodiments of the present invention can be used to select a training sequence used by a base station and a user terminal for communications. In one embodiment, selecting the training sequence to use includes first selecting a training sequence from a set of training sequences. Then, a shift indicator is received, the shift indicator indicating a number of symbols the training sequence is to be shifted. A shifted training sequence is generated by shifting the selected training sequence by the number indicated by the received shift indicator, and the shifted training sequence is used for communication with a first transceiver on a communications channel. In another embodiment, a shift indicator indicating a number of symbols a training sequence is to be shifted is first selected, and then used to generate a shifted training sequence by shifting the training sequence by the number of symbols indicated by the selected shift indicator. The shifted training sequence is then used for communicating with a transceiver on a communications channel.
摘要翻译：本发明的实施例可以用于选择基站和用户终端用于通信的训练序列。在一个实施例中，选择要使用的训练序列包括首先从一组训练序列中选择训练序列。然后，接收到移位指示符，移位指示符指示训练序列将被移位的符号的数目。通过将所选择的训练序列移位所接收到的移位指示符所指示的数字来产生移位的训练序列，并且移位的训练序列用于与通信信道上的第一收发信机进行通信。在另一个实施例中，首先选择指示要移动训练序列的符号数量的移位指示符，然后用于通过将训练序列移位由所选择的移位指示符指示的符号数来产生移位的训练序列。移位的训练序列然后用于与通信信道上的收发器进行通信。

3. 发明授权

US06801589B1 Relative timing acquisition for a radio communications system 失效
标题翻译：无线电通信系统的相对定时采集
公开(公告)号：US06801589B1
公开(公告)日：2004-10-05
申请号：US09727177
申请日：2000-11-30
申请人： Mithat C. Dogan
发明人： Mithat C. Dogan
IPC分类号： H03D100
CPC分类号： H04L27/18 , H04B7/0851
摘要： A method and apparatus are provided that allows a coarse timing approximation to be determined from analyzing only a portion of a received burst. The coarse timing can be refined by focusing on the coarse timing approximation. According to one aspect of the present invention, the invention includes receiving a burst having a known repeating core training sequence, selecting an analysis window to be substantially the same size as a multiple of a single repetition of the core training sequence, and over sampling the received burst for the portion overlapping the analysis window. The invention further includes calculating a cross correlation vector for a portion of the samples with respect to a selected part of the training sequence, each cross correlation vector corresponding to a relative timing hypothesis and each cross correlation vector combining samples that occur at intervals within the analysis window, the intervals corresponding to the period of the repeating core training sequence, calculating a least squares fit for each hypothesis using the calculated cross correlation vectors; and selecting the combination of samples corresponding to the minimal least squares fit as the relative timing of the selected part of the repeating core training sequence.
摘要翻译：提供了一种方法和装置，其允许通过仅分析接收到的突发的一部分来确定粗略的定时近似。可以通过关注粗略的时序近似来粗化时序。根据本发明的一个方面，本发明包括接收具有已知重复核心训练序列的突发，将分析窗口选择为与核心训练序列的单次重复的倍数基本上相同的大小，并且对接收到与分析窗口重叠的部分的突发。本发明还包括相对于训练序列的所选部分计算样本部分的互相关矢量，每个互相关矢量对应于相对定时假设，并且每个互相关向量组合在分析内以间隔发生的样本窗口，对应于重复核心训练序列的周期的间隔，使用计算的互相关向量计算每个假设的最小二乘拟合; 以及选择与最小最小二乘拟合相对应的样本的组合作为重复核心训练序列的选定部分的相对定时。

4. 发明授权

US08325847B2 Method and apparatus for efficient storage of training sequences for peak to average power constrained modulation formats 有权
标题翻译：用于有效存储训练序列的峰值与平均功率约束调制格式的方法和装置
公开(公告)号：US08325847B2
公开(公告)日：2012-12-04
申请号：US12245623
申请日：2008-10-03
申请人： Mithat C. Dogan , Mitchell D. Trott
发明人： Mithat C. Dogan , Mitchell D. Trott
IPC分类号： H04L27/00
CPC分类号： H04J13/105 , H04J13/0029
摘要： The present invention efficiently stores a training sequence in a communications system, where the training sequence exhibits certain desirable characteristics when used by a peak to average power constrained modulation format. In one embodiment, the invention includes selecting a set of one or more original ordered sequences such that the set of ordered sequences has at least one desired property, creating a set of extended sequences, each based on an original ordered sequence by beginning with an element of an original sequence, cyclically appending elements of the original sequence in order to obtain a desired extended sequence length, and modifying each extended sequence using a corresponding modifying sequence, such that a training sequence can be generated from any one of the modified extended sequences by beginning with any one element of any one modified extended sequence and taking each element of the any one sequence in order to obtain the training sequence, the modifying sequence being selected so that the obtained training sequence when modulated by a selected modulation format has the at least one desired property of the corresponding original ordered sequence.
摘要翻译：本发明有效地将训练序列存储在通信系统中，其中训练序列在由峰均功率约束调制格式使用时表现出一定的期望特性。在一个实施例中，本发明包括选择一组一个或多个原始有序序列，使得该组有序序列具有至少一个期望属性，创建一组扩展序列，每一个扩展序列基于原始有序序列，以元素开头原始序列的周期性附加以获得期望的扩展序列长度，并且使用相应的修改序列修改每个扩展序列，使得训练序列可以从修改的扩展序列中的任一个通过从任何一个修改的扩展序列的任何一个元素开始，并且取得任何一个序列的每个元素以获得训练序列，修改序列被选择，使得所获得的训练序列在被选择的调制格式调制时具有至少相应的原始有序序列的一个所需属性。

5. 发明授权

US07720161B1 Generating training sequences in a communications system 有权
标题翻译：在通信系统中生成训练序列
公开(公告)号：US07720161B1
公开(公告)日：2010-05-18
申请号：US10191209
申请日：2002-07-09
申请人： Mithat C. Dogan , Mitchell D. Trott
发明人： Mithat C. Dogan , Mitchell D. Trott
IPC分类号： H04L27/00
CPC分类号： H04L7/041 , H04L25/0226 , H04L2027/0089
摘要： Embodiments of the present invention can be used to generate a family of core training sequences having desired cross-correlation and out-of-phase auto-correlation properties for a communications system. The family can be generated by selecting seed sequences, so that the worst-case cross-correlation of the seed sequences is below a first initial threshold and the worst-case out-of-phase auto-correlation of the seed sequences is below a second initial threshold. Then, sequence families can be generated by inserting additional symbols into a corresponding seed sequence. Then, reduced sequence families can be generated by eliminating those sequences from the sequence families that have a worst-case out-of-phase auto-correlation above a third threshold. A sequence is selected from each reduced sequence family, so that the worst-case cross-correlation of the selected sequences is below a fourth threshold.
摘要翻译：可以使用本发明的实施例来生成具有期望的通信系统的互相关和异相自相关性质的核心训练序列族。可以通过选择种子序列来产生家族，使得种子序列的最坏情况互相关低于第一初始阈值，并且种子序列的最差情况的异相自相关低于第二初始阈值。然后，可以通过将附加符号插入相应的种子序列来生成序列族。然后，可以通过从具有高于第三阈值的最差情况下的异相自相关的序列族中消除那些序列来生成缩减序列族。从每个还原序列家族中选择序列，使得所选序列的最坏情况互相关低于第四阈值。

6. 发明申请

US20100086078A1 METHOD AND APPARATUS FOR EFFICIENT STORAGE OF TRAINING SEQUENCES FOR PEAK TO AVERAGE POWER CONSTRAINED MODULATION FORMATS 有权
标题翻译：训练序列有效存储用于平均功率约束调制格式的方法和装置
公开(公告)号：US20100086078A1
公开(公告)日：2010-04-08
申请号：US12245623
申请日：2008-10-03
申请人： MITHAT C. DOGAN , Mitchell D. Trott
发明人： MITHAT C. DOGAN , Mitchell D. Trott
IPC分类号： H04L27/00
CPC分类号： H04J13/105 , H04J13/0029
摘要： The present invention efficiently stores a training sequence in a communications system, where the training sequence exhibits certain desirable characteristics when used by a peak to average power constrained modulation format. In one embodiment, the invention includes selecting a set of one or more original ordered sequences such that the set of ordered sequences has at least one desired property, creating a set of extended sequences, each based on an original ordered sequence by beginning with an element of an original sequence, cyclically appending elements of the original sequence in order to obtain a desired extended sequence length, and modifying each extended sequence using a corresponding modifying sequence, such that a training sequence can be generated from any one of the modified extended sequences by beginning with any one element of any one modified extended sequence and taking each element of the any one sequence in order to obtain the training sequence, the modifying sequence being selected so that the obtained training sequence when modulated by a selected modulation format has the at least one desired property of the corresponding original ordered sequence.
摘要翻译：本发明有效地将训练序列存储在通信系统中，其中训练序列在由峰均功率约束调制格式使用时表现出一定的期望特性。在一个实施例中，本发明包括选择一组一个或多个原始有序序列，使得该组有序序列具有至少一个期望属性，创建一组扩展序列，每一个扩展序列基于原始有序序列，以元素开头原始序列的周期性附加以获得期望的扩展序列长度，并且使用相应的修改序列修改每个扩展序列，使得训练序列可以从修改的扩展序列中的任一个通过从任何一个修改的扩展序列的任何一个元素开始，并且取得任何一个序列的每个元素以获得训练序列，修改序列被选择，使得所获得的训练序列在被选择的调制格式调制时具有至少相应的原始有序序列的一个所需属性。

7. 发明授权

US07027837B1 Antenna array for point-to-point microwave radio system 失效
标题翻译：天线阵列用于点对点微波无线电系统
公开(公告)号：US07027837B1
公开(公告)日：2006-04-11
申请号：US09966372
申请日：2001-09-27
申请人： Christopher R. Uhlik , Mithat C. Dogan
发明人： Christopher R. Uhlik , Mithat C. Dogan
IPC分类号： H04M1/00
CPC分类号： H01Q19/104 , H01Q21/29
摘要： A system and method for communicating information between two locations via a wireless microwave link is provided. The system includes at least two antennas, each to transmit information as a narrow beam signal to be directed toward a focal point at a remote location. The antennas include at least one antenna to transmit a narrow beam signal toward a redirection point different from the focal point. A redirection device is located at the redirection point to receive the narrow beam signal from the at least one antenna element and to redirect the received narrow beam signal toward the receiver. The redirection point is located such that the narrow beam signals from the at least two antenna elements converge and overlap to form proximate to the receiver, an interference pattern that includes peaks and nulls having a peak-to-peak spacing narrower than the width of each received narrow beam signal.
摘要翻译：提供了一种用于经由无线微波链路在两个位置之间传送信息的系统和方法。该系统包括至少两个天线，每个天线将信息作为窄波束信号发送以指向远程位置处的焦点。天线包括至少一个天线，用于向不同于焦点的重定向点发送窄波束信号。重定向设备位于重定向点以从至少一个天线元件接收窄波束信号，并将接收的窄波束信号重定向到接收机。重定向点被定位成使得来自至少两个天线元件的窄波束信号会聚并重叠以形成接近接收器，干涉图案包括具有比每个天线宽度窄的峰 - 峰间距的峰值和零点收到窄波束信号。

8. 发明授权

US06731689B2 Training sequence for a radio communications system 失效
标题翻译：无线电通信系统的训练顺序
公开(公告)号：US06731689B2
公开(公告)日：2004-05-04
申请号：US10079620
申请日：2002-02-19
申请人： Mithat C. Dogan
发明人： Mithat C. Dogan
IPC分类号： H04L2700
CPC分类号： H04L7/046 , H04B7/0617 , H04B7/086
摘要： A training sequence for a radio communications system is provided. According to one aspect of the present invention, the invention includes a core sequence of symbols, a successive repetition of the core sequence, and a marker sequence having a sequence of symbols different from the core sequence.
摘要翻译：提供了一种用于无线电通信系统的训练序列。根据本发明的一个方面，本发明包括核心的符号序列，核心序列的连续重复以及具有不同于核心序列的符号序列的标记序列。

9. 发明授权

US06650881B1 Calculating spatial weights in a radio communications system 有权
标题翻译：计算无线电通信系统中的空间权重
公开(公告)号：US06650881B1
公开(公告)日：2003-11-18
申请号：US09727261
申请日：2000-11-30
申请人： Mithat C. Dogan
发明人： Mithat C. Dogan
IPC分类号： H04B106
CPC分类号： H01Q3/2605 , H04B7/0851 , H04B7/0854
摘要： A method and apparatus are provided that allows initial beamforming weights to be determined before timing or delay and frequency offset are known. According to one aspect of the present invention, the invention includes receiving a burst from a terminal at a set of spatial diversity antennas, the burst including a known training sequence and storing measurements of the received burst from each spatial diversity antenna corresponding to receive times within a selected analysis window. The invention further includes determining weights for each diversity antenna for at least a portion of the training sequence of the burst before timing for the burst has been determined, applying the determined weights to the stored measurements and determining timing for the burst based on the stored measurements to which the determined weights have been applied.
摘要翻译：提供一种方法和装置，其允许在定时或延迟和频率偏移已知之前确定初始波束成形权重。根据本发明的一个方面，本发明包括从一组空间分集天线的终端接收一个脉冲串，该脉冲串包括一个已知的训练序列，并存储与每个对应于接收时间内的每个空间分集天线的接收脉冲串的测量值一个选定的分析窗口。本发明还包括为突发的定时之前的突发的训练序列的至少一部分确定的确定每个分集天线的权重，将所确定的权重应用于所存储的测量，并基于所存储的测量结果确定突发的定时确定的重量已经被应用于其上。

10. 发明授权

US07016429B1 Training sequences for peak to average power constrained modulation formats 失效
标题翻译：峰值与平均功率约束调制格式的训练序列
公开(公告)号：US07016429B1
公开(公告)日：2006-03-21
申请号：US09967056
申请日：2001-09-28
申请人： Mithat C. Dogan , Mitchell D. Trott
发明人： Mithat C. Dogan , Mitchell D. Trott
IPC分类号： H04L27/10
CPC分类号： H04L27/262
摘要： A method and apparatus are provided that generate, transmit, or receive a training sequence in a communications system, where the training sequence exhibits certain desirable characteristics when used by a peak to average power constrained modulation formal. In one embodiment, the invention includes selecting an original training sequence from a set of possible original training sequences having at least one desired property, forming a modified training sequence by modifying the original training sequence based on a corresponding modifying sequence, such that the modified training sequence exhibits the desired property of the original training sequence when used in a peak to average power constrained modulation format that would otherwise impair the desired property of the original training sequence.
摘要翻译：提供了一种在通信系统中生成，发送或接收训练序列的方法和装置，其中当由峰值到平均功率约束调制形式使用时，训练序列呈现某些期望的特性。在一个实施例中，本发明包括从具有至少一个期望属性的一组可能的原始训练序列中选择原始训练序列，通过基于相应的修改序列修改原始训练序列来形成修改的训练序列，使得经修改的训练当以峰值对平均功率约束调制格式使用时，序列呈现出原始训练序列的期望性质，否则会损害原始训练序列的期望属性。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式