公开(公告)号：US20150092649A1

公开(公告)日：2015-04-02

申请号：US14567923

申请日：2014-12-11

Applicant: Microsoft Corporation

Inventor： Shiquan Wu ,  Wen Tong ,  Claude Royer ,  Edward Sich

IPC: H04L27/26 ,  H04W52/02

CPC classification number: H04W52/0216 ,  H04B1/7103 ,  H04B2201/70714 ,  H04L5/0016 ,  H04L27/2618 ,  H04L27/2647 ,  H04L27/265 ,  H04W52/0229 ,  Y02D70/122 ,  Y02D70/1242

Abstract: Wireless devices, transmitters, systems and methods are provided that have a narrow band signaling channel and a wide band channel, for example an OFDM channel. In order to save power, the wireless device is nominally powered down with the exception of a receiver specific to the narrow band signaling channel. Once instructed to do so over the narrow band signaling channel, the wireless device wakes up the rest of its wide band receive circuitry.

Abstract translation: 提供了具有窄带信令信道和宽带信道（例如OFDM信道）的无线设备，发射机，系统和方法。 为了节省电力，除了窄带信令信道专用的接收机之外，无线设备名义上关闭电源。 一旦通过窄带信令信道指示这样做，无线设备唤醒其宽带接收电路的其余部分。

公开(公告)号：US20130272458A1

公开(公告)日：2013-10-17

申请号：US13915446

申请日：2013-06-11

Applicant: Microsoft Corporation

Inventor： Ming Jia ,  Peiying Zhu ,  Wen Tong ,  Jianglei Ma

IPC: H04L25/02

CPC classification number: H04L25/02 ,  H04L25/03318 ,  H04L2025/03426 ,  H04L2025/03624

Abstract: Symbol detection and soft demapping methods and systems are provided. Individual subset symbol detection according to one or more embodiments involves identifying a search subset of a transmission symbol set for a transmission symbol. For each other transmission symbol in communication signals, multiple search subsets of the transmission symbol set are identified. The multiple search subsets include respective search subsets based on each transmission symbol in either the search subset for the first identified one of the transmission symbols or each of the multiple search subsets identified for a different one of the other transmission symbols. Symbol detection errors may be detected by identifying competing symbols and computing competing distances. Soft demapping may be provided by calculating soft decision results based on detected symbols and weighting the soft decision result.

Abstract translation: 提供符号检测和软解映射方法和系统。 根据一个或多个实施例的单独子集符号检测涉及识别用于传输符号的传输符号集的搜索子集。 对于通信信号中的每个其他传输符号，识别传输符号集合的多个搜索子集。 多个搜索子集包括基于针对第一被识别的一个传输符号的搜索子集中的每个传输符号或为其它传输符号中的不同一个标识的多个搜索子集中的每一个的每个传输符号。 可以通过识别竞争符号和计算竞争距离来检测符号检测错误。 可以通过基于检测到的符号计算软判定结果并对软决策结果加权来提供软解映射。

公开(公告)号：US09008236B2

公开(公告)日：2015-04-14

申请号：US13915446

申请日：2013-06-11

Applicant: Microsoft Corporation

Inventor： Ming Jia ,  Peiying Zhu ,  Wen Tong ,  Jianglei Ma

IPC: H04L27/06 ,  H04L25/02 ,  H04L25/03

CPC classification number: H04L25/02 ,  H04L25/03318 ,  H04L2025/03426 ,  H04L2025/03624

Abstract: Symbol detection and soft demapping methods and systems are provided. Individual subset symbol detection according to one or more embodiments involves identifying a search subset of a transmission symbol set for a transmission symbol. For each other transmission symbol in communication signals, multiple search subsets of the transmission symbol set are identified. The multiple search subsets include respective search subsets based on each transmission symbol in either the search subset for the first identified one of the transmission symbols or each of the multiple search subsets identified for a different one of the other transmission symbols. Symbol detection errors may be detected by identifying competing symbols and computing competing distances. Soft demapping may be provided by calculating soft decision results based on detected symbols and weighting the soft decision result.

Abstract translation: 提供符号检测和软解映射方法和系统。 根据一个或多个实施例的单独子集符号检测涉及识别用于传输符号的传输符号集的搜索子集。 对于通信信号中的每个其他传输符号，识别传输符号集合的多个搜索子集。 多个搜索子集包括基于针对第一被识别的一个传输符号的搜索子集中的每个传输符号或为其它传输符号中的不同一个标识的多个搜索子集中的每一个的每个传输符号。 可以通过识别竞争符号和计算竞争距离来检测符号检测错误。 可以通过基于检测到的符号计算软判定结果并对软决策结果加权来提供软解映射。

公开(公告)号：US20140023046A1

公开(公告)日：2014-01-23

申请号：US14037225

申请日：2013-09-25

Applicant: Microsoft Corporation

Inventor： Jianglei Ma ,  Ming Jia ,  Peiying Zhu ,  Wen Tong ,  Dong-Sheng Yu

IPC: H04W36/18

CPC classification number: H04W36/18 ,  H04B7/022 ,  H04L1/0618 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0025 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0048 ,  H04L25/0232 ,  H04L27/2613 ,  H04L27/2626 ,  H04L27/2647 ,  H04L27/2655

Abstract: Various embodiments relate to soft handoffs in an OFDM system. Each mobile terminal measures pilot signal strengths of transmissions from adjacent base stations. If the pilot signal strength for a base station exceeds the defined threshold, that base station is added to an active set list. Each mobile terminal notifies the base stations of their active set lists. By providing the set list to the base station controller and the servicing base station, the mobile terminal identifies the sole servicing base station or triggers a soft handoff mode when multiple base stations appear on the active set list. The soft handoff mode uses a combination of scheduling and space-time coding to affect efficient and reliable handoffs.

Abstract translation: 各种实施例涉及OFDM系统中的软切换。 每个移动终端测量来自相邻基站的传输的导频信号强度。 如果基站的导频信号强度超过定义的阈值，则该基站被添加到活动集列表中。 每个移动终端向基站通知其活动集列表。 通过将设置列表提供给基站控制器和服务基站，移动终端识别唯一服务基站，或者当多个基站出现在活动集列表上时触发软切换模式。 软切换模式使用调度和时空编码的组合来影响有效和可靠的切换。