公开(公告)号：US09882760B2

公开(公告)日：2018-01-30

申请号：US15508984

申请日：2014-09-24

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： Zhiheng Guo ,  Hai Wang

IPC分类号： H04L27/00 ,  H04L27/26 ,  H04L27/38 ,  H04L27/14

CPC分类号： H04L27/2659 ,  H04L27/14 ,  H04L27/2657 ,  H04L27/2675 ,  H04L27/2679 ,  H04L27/3818 ,  H04L2027/0032 ,  H04L2027/0034 ,  H04L2027/0087

摘要： The present disclosure provides a method implemented in a wireless communication device for estimating a frequency offset between a carrier frequency of a received signal and a frequency of a local oscillator as well as the wireless communication device. The method comprises determining a plurality of phase change candidates for a phase change between a data symbol and a first reference symbol in the signal. The method further comprises generating a collection of constellation symbols from the data symbol and rotating the collection of constellation symbols by the plurality of phase change candidates. Then, one of the phase change candidates corresponding to one of the rotated collections of constellation symbols is selected in such a manner that said one of the rotated collections of constellation symbols matches a set of constellation points best. Next, the frequency offset is determined based on the selected phase change candidate.

公开(公告)号：US09215712B2

公开(公告)日：2015-12-15

申请号：US13758526

申请日：2013-02-04

申请人： Broadcom Corporation

发明人： Francis Swarts ,  Mark Kent

IPC分类号： H04W72/04 ,  H04L27/26 ,  H04J11/00 ,  H04W4/00 ,  H04L27/00

CPC分类号： H04W72/0453 ,  H04J11/0069 ,  H04L27/2657 ,  H04L27/2675 ,  H04L27/2686 ,  H04L2027/0034 ,  H04L2027/0087

摘要： A mobile device receives a signal comprising a PSS and a SSS. The mobile device performs iterative MFHT utilizing a reduced number of MFH branches. At each iteration, frequency offset estimation and Cell-ID detection are concurrently performed. An iteration starts with selecting initial frequency offsets spanning a frequency offset estimation range. The selected initial frequency offsets are placed in the MFH branches. A particular MFH branch with a maximum PSS correlation peak magnitude is selected at the iteration. A frequency offset estimate in the selected MFH branch is utilized for frequency control. The frequency offset estimation range utilized for the current iteration is reduced for the next iteration. A Cell-ID is declared if the Cell-ID is consistently detected not only within a particular iteration on the basis of having detected consistent cell ID information for the first and second halves of a radio frame, but also from iteration to iteration.

摘要翻译： 移动设备接收包括PSS和SSS的信号。 移动设备利用减少数量的MFH分支执行迭代MFHT。 在每次迭代时，同时执行频偏估计和小区ID检测。 迭代开始于选择跨越频率偏移估计范围的初始频率偏移。 所选择的初始频率偏移位于MFH分支中。 在迭代中选择具有最大PSS相关峰值幅度的特定MFH分支。 所选MFH分支中的频率偏移估计用于频率控制。 用于当前迭代的频率偏移估计范围在下一次迭代中减少。 如果基于已经检测到无线电帧的第一和第二半部分的一致的小区ID信息，而且从迭代到迭代，则不仅在特定迭代中一致地检测小区ID，否则将声明小区ID。

公开(公告)号：US08726374B2

公开(公告)日：2014-05-13

申请号：US13133029

申请日：2010-02-15

申请人： Yuji Unagami ,  Manabu Maeda ,  Yuichi Futa ,  Natsume Matsuzaki ,  Masao Nonaka ,  Hiroki Shizuya ,  Masao Sakai ,  Shuji Isobe ,  Eisuke Koizumi ,  Shingo Hasegawa ,  Makoto Carlos Miyauchi

发明人： Yuji Unagami ,  Manabu Maeda ,  Yuichi Futa ,  Natsume Matsuzaki ,  Masao Nonaka ,  Hiroki Shizuya ,  Masao Sakai ,  Shuji Isobe ,  Eisuke Koizumi ,  Shingo Hasegawa ,  Makoto Carlos Miyauchi

IPC分类号： H04N21/442 ,  H04N1/00 ,  G06F21/55 ,  H04L27/00

CPC分类号： H04N21/44236 ,  G06F21/55 ,  H04L2027/0034 ,  H04N1/0088

摘要： A management device detects whether any normal monitoring module that has not been tampered with exists by referring to monitoring results received from an information security device and selects, when existence is detected, one of the monitoring modules and assumes that the selected monitoring module has been tampered with. The monitoring device then successively applies a procedure to monitoring modules other than the selected monitoring module by referring to the monitoring results, starting from the selected monitoring module, the procedure being to assume that any monitoring module determining that a monitoring module assumed to have been tampered with is normal has also been tampered with. As a result of the procedure, when all of the monitoring modules are assumed to have been tampered with the management device determines the selected monitoring module to be a normal monitoring module that has not been tampered with.

摘要翻译： 管理设备通过参考从信息安全设备接收到的监视结果来检测是否存在尚未被篡改的任何正常监视模块，并且当检测到存在时选择监视模块中的一个并假定所选监控模块已被篡改 与。 然后，监视装置依次从所选择的监视模块开始，参考监视结果，对所选择的监视模块以外的监控模块应用程序，该过程是假设任何监视模块确定监视模块被假定为被篡改 与正常也被篡改。 作为该过程的结果，当假定所有监视模块被篡改时，管理装置将所选择的监视模块确定为未被篡改的正常监视模块。

公开(公告)号：US20130195229A1

公开(公告)日：2013-08-01

申请号：US13465613

申请日：2012-05-07

申请人： Hao-Jen CHENG ,  Qinfang SUN

发明人： Hao-Jen CHENG ,  Qinfang SUN

IPC分类号： H04L27/06

CPC分类号： H04L27/0014 ,  H04L27/16 ,  H04L27/2331 ,  H04L2027/0034 ,  H04L2027/0095

摘要： A receiver unit of a communication device can employ multiple correlators for decoding the access address of a packet received from another communication device. A dynamically determined primary frequency offset is applied to a phase difference signal that is determined from an RF signal that comprises the packet. For each of a plurality of access address decoding chains of the receiver unit, a secondary frequency offset associated with the access address decoding chain is applied to the phase difference signal, the phase difference signal is correlated with a predetermined access address of the communication device, and a resultant correlation output is compared against a correlation threshold. One of the access address decoding chains that generated the correlation output that is greater than the correlation threshold is selected and the packet is demodulated based, at least in part, on the phase difference signal corresponding to the selected access address decoding chain.

摘要翻译： 通信设备的接收机单元可以使用多个相关器来解码从另一通信设备接收的分组的接入地址。 将动态确定的主频偏移施加到从包括分组的RF信号确定的相位差信号。 对于接收机单元的多个接入地址解码链中的每一个，与接入地址解码链相关联的次频偏移被施加到相位差信号，相位差信号与通信设备的预定访问地址相关， 并将合成的相关输出与相关阈值进行比较。 选择生成大于相关阈值的相关输出的访问地址解码链之一，并且至少部分地基于与所选择的访问地址解码链相对应的相位差信号来解调分组。

公开(公告)号：US08331497B2

公开(公告)日：2012-12-11

申请号：US12480196

申请日：2009-06-08

申请人： Nader S. Alagha ,  Lars Erup

发明人： Nader S. Alagha ,  Lars Erup

IPC分类号： H04L27/06 ,  H04L27/22 ,  H04B7/212 ,  H04J3/06

CPC分类号： H04B7/18523 ,  H04L27/22 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2679 ,  H04L27/2695 ,  H04L2027/0034 ,  H04L2027/0046 ,  H04L2027/0065

摘要： A joint synchronizer and decoder that implements two decision aided processes, which are referred to as “decision aided candidate selection” and “decision aided synchronization and decoding.” Decision aided candidate selection may be used to select a carrier frequency offset by selecting among a number of candidates for this parameter based on an indication of decoding success. Decision aided synchronization and decoding may be used for phase tracking based on an indication of decoding success. Although these joint synchronizing and decoding techniques may be implemented together, they may also be implemented independently. The joint synchronizer and decoder may be implemented within a return channel receiver in a DVB-RCS system using turbo coding and quadrature phase shift key (QPSK) data modulation.

摘要翻译： 实现两个决策辅助过程的联合同步器和解码器，被称为决策辅助候选选择和决策辅助同步和解码。 决策辅助候选者选择可以用于基于解码成功的指示通过在该参数的候选数中选择来选择载波频率偏移。 决策辅助同步和解码可以用于基于解码成功的指示的相位跟踪。 虽然这些联合同步和解码技术可以一起实现，但是它们也可以独立地实现。 联合同步器和解码器可以在使用turbo编码和正交相移键（QPSK）数据调制的DVB-RCS系统中的返回信道接收机内实现。

公开(公告)号：US08160030B2

公开(公告)日：2012-04-17

申请号：US11835281

申请日：2007-08-07

申请人： Wilfred LeBlanc

发明人： Wilfred LeBlanc

IPC分类号： H04B7/216

CPC分类号： H04L65/1026 ,  H04B3/23 ,  H04B3/234 ,  H04J3/22 ,  H04L1/0002 ,  H04L1/0014 ,  H04L1/0015 ,  H04L1/0026 ,  H04L5/1438 ,  H04L7/027 ,  H04L7/0278 ,  H04L12/2801 ,  H04L12/66 ,  H04L25/03044 ,  H04L29/06 ,  H04L29/06027 ,  H04L47/10 ,  H04L47/11 ,  H04L47/263 ,  H04L47/28 ,  H04L65/1036 ,  H04L65/1069 ,  H04L65/607 ,  H04L65/80 ,  H04L67/322 ,  H04L69/329 ,  H04L2001/0093 ,  H04L2012/5671 ,  H04L2027/0028 ,  H04L2027/0034 ,  H04L2027/0053 ,  H04M7/0072 ,  H04M7/125 ,  H04M11/062 ,  H04M2201/40 ,  H04M2203/2027 ,  H04M2203/2066 ,  H04Q1/45 ,  Y02D50/10

摘要： The present invention provides a data rate controller system for determining the coder used, and hence the data rate, for a plurality of channels in an associated network. Each channel provides statistical information about an associated signal to a central controller (or call/resource manager). The controller considers the information and sends control instructions to each channel for selecting an appropriate coder and/or data rate. The statistical information might include lost-frame rate, jitter, call event discrimination, and system resource utilization. By considering each channel from a centralized standpoint, the network can be optimized according to network capabilities and channel resource capabilities. A profile might also be used where each channel autonomously chooses a coder based upon background noise derived from the source signal.

摘要翻译： 本发明提供一种数据速率控制器系统，用于确定所使用的编码器，并因此确定相关网络中的多个信道的数据速率。 每个通道向中央控制器（或呼叫/资源管理器）提供关于相关信号的统计信息。 控制器考虑信息并向每个通道发送控制指令以选择适当的编码器和/或数据速率。 统计信息可能包括丢帧率，抖动，呼叫事件辨别和系统资源利用。 通过从集中的角度考虑每个信道，可以根据网络能力和信道资源能力优化网络。 也可以在每个通道根据源信号导出的背景噪声自主选择编码器的情况下使用配置文件。

公开(公告)号：US08130726B2

公开(公告)日：2012-03-06

申请号：US11313555

申请日：2005-12-20

申请人： Shimman Patel ,  Kuei-Chiang Lai ,  Seguei A. Glazko

发明人： Shimman Patel ,  Kuei-Chiang Lai ,  Seguei A. Glazko

IPC分类号： H04B7/216

CPC分类号： H04L27/2695 ,  H04L5/0048 ,  H04L25/022 ,  H04L25/0228 ,  H04L27/2613 ,  H04L27/2659 ,  H04L27/2662 ,  H04L27/3872 ,  H04L2027/0034 ,  H04L2027/0065

摘要： For frequency bin error estimation, multiple hypotheses are formed for different frequency bin errors, pilot offsets, or combinations of frequency bin error and pilot offset. For each hypothesis, received symbols are extracted from the proper subbands determined by the hypothesis. In one scheme, the extracted received symbols for each hypothesis are despread with a scrambling sequence to obtain despread symbols for that hypothesis. A metric is derived for each hypothesis based on the despread symbols, e.g., by deriving a channel impulse response estimate based on the despread symbols and then deriving the metric based on the channel impulse response estimate. In another scheme, the extracted received symbols for each hypothesis are correlated, and a metric is derived based on the correlation results. For both schemes, the frequency bin error and/or the pilot offset are determined based on the metrics for all hypotheses evaluated.

摘要翻译： 对于频率块误差估计，针对不同的频率误差，导频偏移或频率误差和导频偏移的组合形成多个假设。 对于每个假设，从由假设确定的适当子带中提取接收符号。 在一个方案中，每个假设的提取的接收符号用加扰序列解扩，以获得该假设的解扩符号。 基于解扩符号为每个假设导出度量，例如通过基于解扩符号导出信道脉冲响应估计，然后基于信道脉冲响应估计导出度量。 在另一方案中，将每个假设的提取的接收符号相关联，并且基于相关结果导出度量。 对于两种方案，基于所评估的所有假设的度量来确定频率块误差和/或导频偏移。

公开(公告)号：US20100142651A1

公开(公告)日：2010-06-10

申请号：US12707736

申请日：2010-02-18

申请人： William Thesling ,  Fan Mo

发明人： William Thesling ,  Fan Mo

IPC分类号： H04L27/22 ,  H04L7/04

CPC分类号： H04L7/10 ,  H04L7/04 ,  H04L27/0014 ,  H04L27/2275 ,  H04L2027/003 ,  H04L2027/0034 ,  H04L2027/0036 ,  H04L2027/0053 ,  H04L2027/0067 ,  H04L2027/0095

摘要： Header information is used to facilitate coarse frequency and frame recovery. The coarse frequency and frame recovery is thereafter utilized to perform adaptive phase and frequency synchronization on a frame-by-frame basis.

摘要翻译： 头信息用于促进粗频和帧恢复。 此后，粗略的频率和帧恢复被用于逐帧执行自适应相位和频率同步。

公开(公告)号：US07653536B2

公开(公告)日：2010-01-26

申请号：US11676978

申请日：2007-02-20

申请人： Onur Tackin ,  Scott Branden

发明人： Onur Tackin ,  Scott Branden

IPC分类号： G10L11/06

CPC分类号： H04L65/103 ,  G10L25/90 ,  H04B3/23 ,  H04B3/234 ,  H04L5/1438 ,  H04L7/027 ,  H04L7/0278 ,  H04L12/2801 ,  H04L12/6418 ,  H04L12/66 ,  H04L25/03044 ,  H04L27/0012 ,  H04L29/06 ,  H04L29/06027 ,  H04L47/10 ,  H04L47/11 ,  H04L47/263 ,  H04L47/28 ,  H04L65/1026 ,  H04L65/1036 ,  H04L65/104 ,  H04L65/1043 ,  H04L65/1069 ,  H04L65/607 ,  H04L65/80 ,  H04L67/322 ,  H04L69/329 ,  H04L2001/0093 ,  H04L2012/5671 ,  H04L2012/6481 ,  H04L2027/0028 ,  H04L2027/0034 ,  H04L2027/0053 ,  H04M3/002 ,  H04M3/2209 ,  H04M3/2272 ,  H04M7/006 ,  H04M7/0069 ,  H04M7/125 ,  H04M11/062 ,  H04M2201/40 ,  H04M2201/52 ,  H04M2203/2027 ,  H04M2203/2066 ,  H04Q1/45 ,  Y02D50/10

摘要： A signal processing system which discriminates between voice signals and data signals modulated by a voiceband carrier. The signal processing system includes a voice exchange, a data exchange and a call discriminator. The voice exchange is capable of exchanging voice signals between a switched circuit network and a packet based network. The signal processing system also includes a data exchange capable of exchanging data signals modulated by a voiceband carrier on the switched circuit network with unmodulated data signal packets on the packet based network. The data exchange is performed by demodulating data signals from the switched circuit network for transmission on the packet based network, and modulating data signal packets from the packet based network for transmission on the switched circuit network. The call discriminator is used to selectively enable the voice exchange and data exchange.

摘要翻译： 一种信号处理系统，其识别语音信号和由语音频带载波调制的数据信号。 信号处理系统包括语音交换，数据交换和呼叫鉴别器。 语音交换能够在交换电路网络和基于分组的网络之间交换语音信号。 信号处理系统还包括能够在基于分组的网络上与未调制的数据信号分组交换由交换电路网络上的语音带载波调制的数据信号的数据交换。 通过解调来自交换电路网络的数据信号进行数据交换，以在基于分组的网络上进行传输，并且调制来自基于分组的网络的数据信号分组，以便在交换电路网络上传输。 呼叫鉴别器用于选择性地启用语音交换和数据交换。

公开(公告)号：US20080279220A1

公开(公告)日：2008-11-13

申请号：US11746111

申请日：2007-05-09

申请人： Michael Mao Wang

发明人： Michael Mao Wang

IPC分类号： H04B3/10

CPC分类号： H04W48/16 ,  H04J3/02 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0048 ,  H04L25/03866 ,  H04L27/0014 ,  H04L27/2604 ,  H04L27/2605 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2662 ,  H04L2027/0034 ,  H04L2027/0095

摘要： Techniques for sending sector/system information in TDM pilots using a hierarchical pilot structure are described. A base station sends multiple sets of bits for the sector/system information in multiple TDM pilots. The set of bits sent in a given TDM pilot may include bits sent in earlier TDM pilots. In one design, the base station generates a first TDM pilot based on a first set of bits, generates a second TDM pilot based on a second set of bits that includes the first set, generates a third TDM pilot based on all bits for the information, and sends the TDM pilots. A terminal performs detection to obtain a first detected value for the first TDM pilot, performs detection based on the first detected value to obtain a second detected value for the second TDM pilot, and performs detection based on the first and second detected values to obtain a third detected value for the third TDM pilot.

摘要翻译： 描述了使用分层导频结构在TDM导频中发送扇区/系统信息的技术。 基站在多个TDM导频中为扇区/系统信息发送多组比特。 在给定的TDM导频中发送的比特集合可以包括在先前的TDM导频中发送的比特。 在一种设计中，基站基于第一组比特生成第一TDM导频，基于包括第一组的第二组比特生成第二TDM导频，基于所述信息的所有比特生成第三TDM导频 并发送TDM导频。 终端执行检测以获得用于第一TDM导频的第一检测值，基于第一检测值进行检测，以获得第二TDM导频的第二检测值，并且基于第一和第二检测值进行检测，以获得 第三个TDM导频的第三个检测值。