公开(公告)号：US20070242639A1

公开(公告)日：2007-10-18

申请号：US11487260

申请日：2006-07-14

申请人： Alexander Leonidov ,  Hui Jin ,  Rajiv Laroia ,  Junyi Li ,  Murari Srinivasan

发明人： Alexander Leonidov ,  Hui Jin ,  Rajiv Laroia ,  Junyi Li ,  Murari Srinivasan

IPC分类号： H04B7/216

CPC分类号： H04L27/2608

摘要： Improved ways of communicating assignment signals using flash signaling are described, e.g., for wireless terminals with low SNR, that are more robust against large variation of channel gains due to e.g., frequency selective fading and fast fading in time. Coding and modulation methods and apparatus that have excellent properties against symbol erasures are described. The use of flash signaling provides an improved assignment channel having strong performance on the fading channel without compromising the performance on the AWGN channel. In one exemplary embodiment, the coding and modulation method can tolerate up to 5 erased symbols out of 8 transmitted symbols. One embodiment reduces or minimizes the sector interference on the flash assignment by improving or maximizing orthogonality between different sectors. In addition, one embodiment describes improved ways of swapping flash assignment tone-symbols in the presence other high priority signals, like sector pilots and sector null pilots.

摘要翻译： 例如，对于具有低SNR的无线终端，使用闪信号进行传送分配信号的改进方式对于由于例如频率选择性衰落和时间上的快速衰落而导致的信道增益的大变化更加鲁棒。 描述了具有针对符号擦除的优异特性的编码和调制方法和装置。 闪光信令的使用提供了在衰落信道上具有强性能的改进的分配信道，而不损害AWGN信道上的性能。 在一个示例性实施例中，编码和调制方法可以容忍8个发送的符号中多达5个擦除的符号。 一个实施例通过改善或最大化不同扇区之间的正交性来减少或最小化闪存分配上的扇区干扰。 此外，一个实施例描述了在存在其他高优先级信号（如扇区导频和扇区空导频）时交换闪存分配音调符号的改进方式。

公开(公告)号：US08351405B2

公开(公告)日：2013-01-08

申请号：US11486653

申请日：2006-07-14

申请人： Junyi Li ,  Vladimir Parizhisky ,  Alexander Leonidov ,  Thomas J. Richardson

发明人： Junyi Li ,  Vladimir Parizhisky ,  Alexander Leonidov ,  Thomas J. Richardson

IPC分类号： H04J3/00

CPC分类号： H04L27/261 ,  H04L5/0007

摘要： Methods and apparatus for improved beacon signaling in a wireless communication system are described. Information is encoded in the tone position of the beacon tone. The information encoded may include sector type, sector index and slope index, as well as some time index. The information is coded in the tone position so that any few of several beacons can be decoded in order to decode the information. The methods and apparatus described in the invention improve the robustness against frequency selective fading and do not require wireless terminals to establish synchronization for reliable base station detection.

摘要翻译： 描述了用于在无线通信系统中改进信标信令的方法和装置。 信息被编码在信标音的音调位置。 编码的信息可以包括扇区类型，扇区索引和斜率索引，以及一些时间索引。 信息被编码在音调位置，使得可以解码几个信标中的几个信号以便解码信息。 本发明中描述的方法和装置提高了针对频率选择性衰落的鲁棒性，并且不需要无线终端来建立用于可靠的基站检测的同步。

公开(公告)号：US08005158B2

公开(公告)日：2011-08-23

申请号：US11487260

申请日：2006-07-14

申请人： Alexander Leonidov ,  Hui Jin ,  Rajiv Laroia ,  Junyi Li ,  Murari Srinivasan

发明人： Alexander Leonidov ,  Hui Jin ,  Rajiv Laroia ,  Junyi Li ,  Murari Srinivasan

IPC分类号： H04L5/12 ,  H04L23/02

CPC分类号： H04L27/2608

摘要： Improved ways of communicating assignment signals using flash signaling are described, e.g., for wireless terminals with low SNR, that are more robust against large variation of channel gains due to e.g., frequency selective fading and fast fading in time. Coding and modulation methods and apparatus that have excellent properties against symbol erasures are described. The use of flash signaling provides an improved assignment channel having strong performance on the fading channel without compromising the performance on the AWGN channel. In one exemplary embodiment, the coding and modulation method can tolerate up to 5 erased symbols out of 8 transmitted symbols. One embodiment reduces or minimizes the sector interference on the flash assignment by improving or maximizing orthogonality between different sectors. In addition, one embodiment describes improved ways of swapping flash assignment tone-symbols in the presence other high priority signals, like sector pilots and sector null pilots.

摘要翻译： 例如，对于具有低SNR的无线终端，改进的使用闪信号进行分配信号的方式被描述，对于由于例如频率选择性衰落和时间上的快速衰落而导致的信道增益的大变化更加鲁棒。 描述了具有针对符号擦除的优异特性的编码和调制方法和装置。 闪光信令的使用提供了在衰落信道上具有强性能的改进的分配信道，而不损害AWGN信道上的性能。 在一个示例性实施例中，编码和调制方法可以容忍8个发送的符号中多达5个擦除的符号。 一个实施例通过改善或最大化不同扇区之间的正交性来减少或最小化闪存分配上的扇区干扰。 此外，一个实施例描述了在存在其他高优先级信号（如扇区导频和扇区空导频）时交换闪存分配音调符号的改进方式。

公开(公告)号：US07929501B2

公开(公告)日：2011-04-19

申请号：US11852028

申请日：2007-09-07

申请人： Alexander Leonidov ,  Thomas Richardson

发明人： Alexander Leonidov ,  Thomas Richardson

IPC分类号： H04B7/216

CPC分类号： H04W48/12 ,  H04L5/0053

摘要： Methods and apparatus related to efficiently communicating information, such as base station identification information and/or timing information, via beacon signals are described. Base station identification information and/or timing information is communicated via beacon signals. A beacon coding scheme is utilized in which different base station sectors in the communications system are associated with different sub-sets of beacon tones, e.g., a sub-set of 4 beacon tones. Different beacon tone sub-sets have at most 1 tone in common. A base station sector transmitter transmits a sequence of beacon signals, in accordance with a predetermined beacon tone hopping pattern, in a recurring timing structure, each beacon signal including one of the tones from its associated beacon tone subset. The structure of the beacon tone subsets and the hopping pattern facilitates efficient communication of information, efficient recovery of information being communicated and/or a simple implementation decoder by a wireless terminal.

摘要翻译： 描述了通过信标信号有效地传送诸如基站识别信息和/或定时信息的信息的方法和装置。 通过信标信号来传送基站识别信息和/或定时信息。 使用信标编码方案，其中通信系统中的不同基站扇区与信标音调的不同子集（例如，4个信标音调的子集）相关联。 不同的信标音子集最多有1个共同点。 基站扇区发射机以循环定时结构根据预定的信标音跳频模式传输信标信号序列，每个信标信号包括来自其相关信标音子集的一个音调。 信标音频子集和跳频模式的结构有助于信息的有效通信，正在通信的信息的有效恢复和/或无线终端的简单的实现解码器。

公开(公告)号：US07801227B2

公开(公告)日：2010-09-21

申请号：US11486881

申请日：2006-07-14

申请人： Vladimir Parizhisky ,  Rajiv Laroia ,  Alexander Leonidov ,  Tom Richardson ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Vladimir Parizhisky ,  Rajiv Laroia ,  Alexander Leonidov ,  Tom Richardson ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04K1/00

CPC分类号： H04L27/2613 ,  H04L5/023 ,  H04L27/2614 ,  H04L27/2655

摘要： A composite signal includes a high power beacon signal and low power corresponding wideband synchronization signal and is communicated over a time interval exceeding a single OFDM transmission time interval. A base station transmits one or more different such composite broadcast signals in a recurring timing structure. Each different potential beacon signal, e.g., a single tone signal, is paired with a unique wideband synchronization signal. A wideband synchronization signal includes at least some predetermined null tones and at least some predetermined non-null tones. For a given wideband synchronization signal, the predetermined null tones carry predetermined modulation symbol values, A wireless terminal receives a composite signal, identifies a beacon, determines a corresponding known wideband synchronization signal, compares received to known wideband synchronization signals, and determines at least one of a timing adjustment, frequency adjustment and channel estimation.

摘要翻译： 复合信号包括高功率信标信号和低功率对应的宽带同步信号，并且在超过单个OFDM传输时间间隔的时间间隔上传送。 基站以循环定时结构发送一个或多个不同的这种复合广播信号。 每个不同的潜在信标信号，例如单个音调信号，与唯一的宽带同步信号配对。 宽带同步信号至少包括一些预定的无效音调和至少一些预定的非空音调。 对于给定的宽带同步信号，预定的空音携带预定的调制符号值，A无线终端接收复合信号，识别信标，确定对应的已知宽带同步信号，将已接收的已知宽带同步信号进行比较，并确定至少一个 定时调整，频率调整和信道估计。

公开(公告)号：US09178732B2

公开(公告)日：2015-11-03

申请号：US12446728

申请日：2007-10-26

申请人： Thomas Richardson ,  Husheng Li ,  Junyi Li ,  Alexander Leonidov ,  Rajiv Laroia ,  Ravi Palanki ,  Gavin Horn ,  Ashwin Sampath

发明人： Thomas Richardson ,  Husheng Li ,  Junyi Li ,  Alexander Leonidov ,  Rajiv Laroia ,  Ravi Palanki ,  Gavin Horn ,  Ashwin Sampath

IPC分类号： H04W72/04 ,  H04J3/00 ,  H04L27/10 ,  H04L1/00 ,  H04L5/00

CPC分类号： H04L27/10 ,  H04L1/0045 ,  H04L5/0053 ,  H04L5/0091

摘要： Systems and methodologies are described that facilitate transmitting beacon symbols of a beacon message such that a sequence of symbols can satisfy a linear constraint over a field where the field elements can be identified with carriers. In this regard, a coding scheme can be applied to a beacon message; the coding scheme can produce a plurality of beacon symbols to transmit on given subcarriers. A receiving device of the beacon symbols can decode a beacon message by receiving less than the total number of symbols in a beacon message and determining the remaining symbol subcarriers based on the linear constraint. Thus, more efficient decoding of beacons is facilitated as well as resolving beacon ambiguity by figuring out which symbols satisfy linear constraints for the symbols, and resolving time and frequency shift by detecting an offset that would result in satisfaction of the linear constraint.

摘要翻译： 描述了促进发送信标消息的信标符号的系统和方法，使得符号序列可以满足可以用载波识别场元素的场的线性约束。 在这方面，编码方案可以应用于信标消息; 编码方案可以产生多个信标符号，以在给定子载波上进行传输。 信标符号的接收设备可以通过接收小于信标消息中的总符号数来解码信标消息，并且基于线性约束确定剩余的符号子载波。 因此，有助于信标的更有效的解码以及通过找出哪些符号满足符号的线性约束来解析信标模糊度，以及通过检测将导致满足线性约束的偏移来解决时间和频率偏移。

公开(公告)号：US20080062929A1

公开(公告)日：2008-03-13

申请号：US11852028

申请日：2007-09-07

申请人： Alexander Leonidov ,  Thomas Richardson

发明人： Alexander Leonidov ,  Thomas Richardson

IPC分类号： H04Q7/06

CPC分类号： H04W48/12 ,  H04L5/0053

摘要： Methods and apparatus related to efficiently communicating information, such as base station identification information and/or timing information, via beacon signals are described. Base station identification information and/or timing information is communicated via beacon signals. A beacon coding scheme is utilized in which different base station sectors in the communications system are associated with different sub-sets of beacon tones, e.g., a sub-set of 4 beacon tones. Different beacon tone sub-sets have at most 1 tone in common. A base station sector transmitter transmits a sequence of beacon signals, in accordance with a predetermined beacon tone hopping pattern, in a recurring timing structure, each beacon signal including one of the tones from its associated beacon tone subset. The structure of the beacon tone subsets and the hopping pattern facilitates efficient communication of information, efficient recovery of information being communicated and/or a simple implementation decoder by a wireless terminal.

摘要翻译： 描述了通过信标信号有效地传送诸如基站识别信息和/或定时信息的信息的方法和装置。 通过信标信号来传送基站识别信息和/或定时信息。 使用信标编码方案，其中通信系统中的不同基站扇区与信标音调的不同子集（例如，4个信标音调的子集）相关联。 不同的信标音子集最多有1个共同点。 基站扇区发射机以循环定时结构根据预定的信标音跳频模式传输信标信号序列，每个信标信号包括来自其相关信标音子集的一个音调。 信标音频子集和跳频模式的结构有助于信息的有效通信，正在通信的信息的有效恢复和/或无线终端的简单实现解码器。

公开(公告)号：US20080013479A1

公开(公告)日：2008-01-17

申请号：US11486653

申请日：2006-07-14

申请人： Junyi Li ,  Vladimir Parizhisky ,  Alexander Leonidov

发明人： Junyi Li ,  Vladimir Parizhisky ,  Alexander Leonidov

IPC分类号： H04Q7/00

CPC分类号： H04L27/261 ,  H04L5/0007

摘要： Methods and apparatus for improved beacon signaling in a wireless communication system are described. Information is encoded in the tone position of the beacon tone. The information encoded may include sector type, sector index and slope index, as well as some time index. The information is coded in the tone position so that any few of several beacons can be decoded in order to decode the information. The methods and apparatus described in the invention improve the robustness against frequency selective fading and do not require wireless terminals to establish synchronization for reliable base station detection.

摘要翻译： 描述了用于在无线通信系统中改进信标信令的方法和装置。 信息被编码在信标音的音调位置。 编码的信息可以包括扇区类型，扇区索引和斜率索引，以及一些时间索引。 信息被编码在音调位置，使得可以解码几个信标中的几个信号以便解码信息。 本发明中描述的方法和装置提高了针对频率选择性衰落的鲁棒性，并且不需要无线终端来建立用于可靠的基站检测的同步。

公开(公告)号：US20070242765A1

公开(公告)日：2007-10-18

申请号：US11486881

申请日：2006-07-14

申请人： Vladimir Parizhisky ,  Rajiv Laroia ,  Alexander Leonidov ,  Tom Richardson ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Vladimir Parizhisky ,  Rajiv Laroia ,  Alexander Leonidov ,  Tom Richardson ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04K1/10

CPC分类号： H04L27/2613 ,  H04L5/023 ,  H04L27/2614 ,  H04L27/2655

摘要： A composite signal includes a high power beacon signal and low power corresponding wideband synchronization signal and is communicated over a time interval exceeding a single OFDM transmission time interval. A base station transmits one or more different such composite broadcast signals in a recurring timing structure. Each different potential beacon signal, e.g., a single tone signal, is paired with a unique wideband synchronization signal. A wideband synchronization signal includes at least some predetermined null tones and at least some predetermined non-null tones. For a given wideband synchronization signal, the predetermined null tones carry predetermined modulation symbol values, A wireless terminal receives a composite signal, identifies a beacon, determines a corresponding known wideband synchronization signal, compares received to known wideband synchronization signals, and determines at least one of a timing adjustment, frequency adjustment and channel estimation.

摘要翻译： 复合信号包括高功率信标信号和低功率对应的宽带同步信号，并且在超过单个OFDM传输时间间隔的时间间隔上传送。 基站以循环定时结构发送一个或多个不同的这种复合广播信号。 每个不同的潜在信标信号，例如单个音调信号，与唯一的宽带同步信号配对。 宽带同步信号至少包括一些预定的无效音调和至少一些预定的非空音调。 对于给定的宽带同步信号，预定的空音携带预定的调制符号值，A无线终端接收复合信号，识别信标，确定对应的已知宽带同步信号，将已接收的已知宽带同步信号进行比较，并确定至少一个 定时调整，频率调整和信道估计。

公开(公告)号：US20070165728A1

公开(公告)日：2007-07-19

申请号：US11333759

申请日：2006-01-17

申请人： Vladimir Parizhsky ,  Rajiv Laroia ,  Alexander Leonidov ,  Tom Richardson ,  Junyi Li

发明人： Vladimir Parizhsky ,  Rajiv Laroia ,  Alexander Leonidov ,  Tom Richardson ,  Junyi Li

IPC分类号： H04K1/10

CPC分类号： H04L27/2613 ,  H04L27/2607 ,  H04L27/2655 ,  H04W48/08 ,  H04W52/325 ,  H04W56/00 ,  H04W56/003 ,  H04W88/08

摘要： A base station generates and transmits a multi-symbol beacon/timing synchronization signal. The multi-symbol beacon/timing synchronization signal includes: (i) an initial symbol including a body portion and a cyclic prefix, the cyclic prefix preceding the body portion and being generated from an end portion of the body portion and (ii) an extension symbol, which immediately follows the initial symbol. The extension symbol includes a first copy of the body portion beginning at the start of the extension symbol. The first copy of the body portion is immediately followed by a truncated portion, which is a copy of an initial portion of the body portion. The multi-symbol beacon/timing synchronization signal includes a single high power beacon tone, a plurality of low power tones comprising the synchronization signal, and a plurality of intentional Null tones. Each tone designation remains the same for both the initial symbol and the extension symbol.

摘要翻译： 基站生成并发送多符号信标/定时同步信号。 多符号信标/定时同步信号包括：（i）包括主体部分和循环前缀的初始符号，主体部分之前的循环前缀，并且从主体部分的端部生成，以及（ii）扩展 符号，紧跟着初始符号。 扩展符号包括从扩展符号开始开始的主体部分的第一副本。 主体部分的第一份副本后面紧跟着截面部分，该部分是主体部分的初始部分的副本。 多符号信标/定时同步信号包括单个高功率信标音调，包括同步信号的多个低功率音调以及多个有意的空音调。 对于初始符号和扩展符号，每个音色指定保持相同。