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1. 发明授权

US07512109B2 Slot structure for radio communications system 失效
标题翻译：无线电通信系统的插槽结构
公开(公告)号：US07512109B2
公开(公告)日：2009-03-31
申请号：US10262108
申请日：2002-09-30
申请人： Mitchell D. Trott , Mithat C. Dogan , Paul Petrus , Sundar G. Sankaran
发明人： Mitchell D. Trott , Mithat C. Dogan , Paul Petrus , Sundar G. Sankaran
IPC分类号： H04B7/212
CPC分类号： H04B7/0851 , H04B7/2656 , H04B7/2659 , H04L27/18
摘要： In one embodiment, the present invention includes a slot in a repeating time division frame with a first training sequence, an information sequence after the first training sequence, and a second training sequence after the information sequence. In some embodiments either the first or the second training sequences indicates a type for the information sequence, such as a random access channel message and a traffic channel message, a configuration message, a channel assignment message, or a data traffic message.
摘要翻译：在一个实施例中，本发明包括具有第一训练序列，第一训练序列之后的信息序列和信息序列之后的第二训练序列的重复时分帧中的时隙。在一些实施例中，第一或第二训练序列指示信息序列的类型，诸如随机接入信道消息和业务信道消息，配置消息，信道分配消息或数据业务消息。

2. 发明授权

US06650714B2 Spatial processing and timing estimation using a training sequence in a radio communications system 有权
公开(公告)号：US06650714B2
公开(公告)日：2003-11-18
申请号：US09841456
申请日：2001-04-24
申请人： Mithat C. Dogan , Paul Petrus , Mitchell D. Trott
发明人： Mithat C. Dogan , Paul Petrus , Mitchell D. Trott
IPC分类号： H04L2706
CPC分类号： H04L27/18 , H04B7/0851
摘要： A method and apparatus are provided that performs spatial processing, timing estimation and frequency offset using a training sequence of a received burst. According to one aspect of the present invention, the invention includes receiving a burst having a known training sequence at a set of diversity antennas, sampling the received burst at each antenna, determining a coarse timing estimate for samples from at least one antenna, and determining a spatial weighting vector using the coarse timing estimate. The embodiment further includes applying the spatial weighting vector to the received burst samples for each antenna to form a single channel signal, determining a fine timing estimate for the single channel signal, determining a second spatial weighting vector using the fine timing estimate, applying the second spatial weighting vector to the received burst samples for each antenna to form a second single channel signal, and demodulating the second single channel signal.

3. 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。

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。

7. 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。

8. 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。

9. 发明授权

US06768747B1 Relative and absolute timing acquisition for a radio communications system 有权
标题翻译：无线电通信系统的相对和绝对定时采集
公开(公告)号：US06768747B1
公开(公告)日：2004-07-27
申请号：US09726799
申请日：2000-11-30
申请人： Mithat C. Dogan
发明人： Mithat C. Dogan
IPC分类号： H04J306
CPC分类号： H04L7/041 , H04L7/08
摘要： A method and apparatus are provided that allows timing to be determined in two steps. According to one aspect of the present invention, the invention includes searching a received digital signal burst for a known repeating core sequence, the core sequence having a first symbol sequence, and, upon finding one of the core sequences, determining sequence timing of the found core sequence using the found core sequence. The invention further includes searching the received burst for a marker sequence following the repetition of the core sequence, the marker sequence having a second symbol sequence different from the first symbol sequence and upon finding the marker sequence, determining timing of the received digital signal burst using the found marker sequence.
摘要翻译：提供了允许以两个步骤确定定时的方法和装置。根据本发明的一个方面，本发明包括搜索接收的数字信号脉冲串用于已知的重复核心序列，核心序列具有第一符号序列，并且在找到核心序列之一时，确定发现的序列时序核心序列使用找到的核心序列。本发明还包括在核心序列的重复之后搜索所接收的脉冲串中的标记序列，所述标记序列具有不同于第一符号序列的第二符号序列，并且在找到标记序列时，确定接收到的数字信号突发的定时，使用找到的标记序列。

10. 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。

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