公开(公告)号：US20230155809A1

公开(公告)日：2023-05-18

申请号：US18050134

申请日：2022-10-27

申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.

发明人： Conrad ZERNA ,  Peter NAGEL

IPC分类号： H04L7/04

CPC分类号： H04L7/043

摘要： An apparatus for generating a data stream according to an embodiment is provided. The apparatus is configured to generate the data stream, such that the data stream has header data and payload data. The apparatus is configured to generate the header data such that the header data comprises a synchronization header. Moreover, the apparatus is configured to generate the synchronization header using binary coding. Furthermore, the apparatus is configured to generate the synchronization header such that the synchronization header comprises a synchronization sequence being a predefined bit sequence having a plurality of bits.

公开(公告)号：US20190222443A1

公开(公告)日：2019-07-18

申请号：US16360945

申请日：2019-03-21

申请人： NXP B.V.

发明人： Thomas Baier ,  Wolfgang Küchler ,  Frank Leong

IPC分类号： H04L25/02 ,  H04L9/32

CPC分类号： H04L25/0202 ,  G01S5/0215 ,  G01S13/765 ,  H04J3/0608 ,  H04L7/042 ,  H04L7/043 ,  H04L9/3236 ,  H04L25/0212 ,  H04L25/0224

摘要： A processing module for a receiver device. The processor module comprises a channel estimate generation component arranged to output channel estimate information for a received signal, and a timestamping module arranged to determine a ToA measurement for a marker within a packet of the received signal based at least partly on the channel estimate information for the received signal generated by the channel estimate generation component. The channel estimate generation component comprises a validation component arranged to derive a validation pattern for the packet within the received signal for which a ToA measurement is to be determined, identify a section of the packet containing a validation sequence, and perform cross-correlation between at least a part of the validation sequence within the packet and at least a part of the generated validation pattern to generate channel estimate validation information.

公开(公告)号：US09973260B2

公开(公告)日：2018-05-15

申请号：US15433052

申请日：2017-02-15

申请人： Google Inc.

发明人： Dedi David Haziza

IPC分类号： H04B7/185 ,  H04W76/00 ,  H04L7/04 ,  H04W76/02 ,  H04B1/707 ,  H04B7/155 ,  H04B7/04 ,  H04W72/04

CPC分类号： H04B7/185 ,  H04B1/707 ,  H04B7/04 ,  H04B7/155 ,  H04B7/18504 ,  H04L7/043 ,  H04W72/04 ,  H04W72/0453 ,  H04W76/10

摘要： A method for modifying a communication signal for transmission from a source to a destination includes identifying, by data processing hardware, a target platform for communication with a communication device. The method includes establishing a communication connection between the target platform and the communication device and identifying an available communication channel for communicating data between the target platform and the communication device. The method also includes modifying a communication signal by multiplying the communication signal with a pseudo random noise spreading code. The method also includes causing transmission of the modified communication signal from the communication device to the target platform through the available communication channel. The modified communication signal is transmitted below a thermal noise of the available communication channel.

公开(公告)号：US09954715B2

公开(公告)日：2018-04-24

申请号：US15267396

申请日：2016-09-16

申请人： APPLE INC.

发明人： Jianglei Ma ,  Hang Zhang ,  Wen Tong ,  Ming Jia ,  Peiying Zhu ,  Mo-Han Fong

IPC分类号： H04L27/26 ,  H04B7/02 ,  H04L5/00 ,  H04W24/02 ,  H04B7/0452 ,  H04L7/04

CPC分类号： H04L27/2692 ,  H04B7/02 ,  H04B7/0452 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0048 ,  H04L7/043 ,  H04L27/2613 ,  H04L27/265 ,  H04L27/2655 ,  H04L27/2686 ,  H04W24/02

摘要： The present invention provides a preamble that is inserted into an OFDMA frame and has a common sequence for all the base stations participating in a transmission. The subscriber station performs fine synchronization using the common sequence on the common preamble, and the resulting peaks will provide the locations of candidate base stations. The base station specific search is then performed in the vicinities of those peaks by using base station specific pseudo-noise sequences. With this two stage cell search, the searching window is drastically reduced. The preamble is matched to known values by a respective receiver to decode the signals and permit multiple signals to be transferred from the transmitter to the receiver. The preamble may comprise two parts, Preamble-I and Preamble-2, which may be used in different systems, including multioutput, multi-input (MIMO) systems.

公开(公告)号：US09888435B2

公开(公告)日：2018-02-06

申请号：US14938109

申请日：2015-11-11

申请人： Electronics and Telecommunications Research Institute

发明人： Kap Seok Chang ,  Il Gyu Kim ,  Hyeong Geun Park ,  Young Jo Ko ,  Hyo Seok Yi ,  Chan Bok Jeong ,  Young Hoon Kim ,  Seung Chan Bang

IPC分类号： H04W48/16 ,  H04B7/26 ,  H04J11/00 ,  H04L7/04 ,  H04L27/26 ,  H04W72/04 ,  H04W56/00 ,  H04B1/7073 ,  H04W88/08

CPC分类号： H04W48/16 ,  H04B1/70735 ,  H04B7/2656 ,  H04J11/0069 ,  H04L7/043 ,  H04L27/2613 ,  H04L27/2655 ,  H04W56/00 ,  H04W72/042 ,  H04W72/0446 ,  H04W88/08

摘要： The present application relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence and a fourth scrambling sequence determined by the second short sequence; scrambling the short sequences with the respective scrambling sequences; and mapping the secondary synchronization signal that includes the first short sequence scrambled with the first scrambling sequence, the second short sequence scrambled with the second scrambling sequence and the third scrambling sequence, the second short sequence scrambled with the first scrambling sequence and the first short sequence scrambled by the second scrambling sequence and the fourth scrambling sequence to a frequency domain.

公开(公告)号：US09825723B2

公开(公告)日：2017-11-21

申请号：US15084280

申请日：2016-03-29

申请人： Kandou Labs, S.A.

发明人： Brian Holden ,  Amin Shokrollahi ,  Anant Singh

IPC分类号： H04B1/38 ,  H04L27/00 ,  H03K9/00 ,  H04B17/364 ,  H04B5/00 ,  H04L25/49 ,  H04B3/00 ,  H04L25/03 ,  H04L25/02 ,  H04L1/06 ,  H04L7/04 ,  H04L25/08 ,  H04B3/02

CPC分类号： H04B17/364 ,  G06F13/00 ,  H04B3/00 ,  H04B3/02 ,  H04B5/0031 ,  H04B5/0081 ,  H04L1/0041 ,  H04L1/0643 ,  H04L7/043 ,  H04L7/048 ,  H04L25/0268 ,  H04L25/0272 ,  H04L25/028 ,  H04L25/0292 ,  H04L25/03019 ,  H04L25/08 ,  H04L25/4925 ,  H04L2001/0096 ,  Y02D70/26 ,  Y02D70/42

摘要： Advanced detectors for vector signaling codes are disclosed which utilize multi-input comparators, generalized on-level slicing, reference generation based on maximum swing, and reference generation based on recent values. Vector signaling codes communicate information as groups of symbols which, when transmitted over multiple communications channels, may be received as mixed sets of symbols from different transmission groups due to propagation time variations between channels. Systems and methods are disclosed which compensate receivers and transmitters for these effects and/or utilize codes having increased immunity to such variations, and circuits are described that efficiently implement their component functions.

公开(公告)号：US20170149513A1

公开(公告)日：2017-05-25

申请号：US15368805

申请日：2016-12-05

申请人： Rambus Inc.

发明人： Andrew Ho ,  Vladimir Stojanovic ,  Bruno W. Garlepp ,  Fred F. Chen

IPC分类号： H04B17/29 ,  H04L25/03

CPC分类号： H04B17/29 ,  G01R31/31711 ,  G06F11/08 ,  H04B17/21 ,  H04L1/20 ,  H04L1/241 ,  H04L1/242 ,  H04L7/033 ,  H04L7/043 ,  H04L7/10 ,  H04L25/03006 ,  H04L25/03057 ,  H04L25/03146 ,  H04L25/03949 ,  H04L27/01

摘要： Described are methods and circuits for margin testing digital receivers. These methods and circuits prevent margins from collapsing in response to erroneously received data, and can thus be used in receivers that employ historical data to reduce intersymbol interference (ISI). Some embodiments detect receive errors for input data streams of unknown patterns, and can thus be used for in-system margin testing. Such systems can be adapted to dynamically alter system parameters during device operation to maintain adequate margins despite fluctuations in the system noise environment due to e.g. temperature and supply-voltage changes. Also described are methods of plotting and interpreting filtered and unfiltered error data generated by the disclosed methods and circuits. Some embodiments filter error data to facilitate pattern-specific margin testing.

公开(公告)号：US09544128B2

公开(公告)日：2017-01-10

申请号：US14768302

申请日：2013-02-21

申请人： QUALCOMM INCORPORATED

发明人： Hai Jiang ,  Yin Huang ,  Changlong Xu ,  Jian Li ,  Yisheng Xue

IPC分类号： H04L7/00 ,  H04L7/04 ,  H04L7/10

CPC分类号： H04L7/0037 ,  H04L7/0062 ,  H04L7/043 ,  H04L7/10

摘要： A method of data-aided timing recovery for Ethernet systems is disclosed. A first device negotiates a pseudorandom number sequence with a second device and receives a data signal from the second device. The first device samples the received data signal to recover a first training sequence. The first device also generates a second training sequence based on the pseudorandom number sequence. The second training sequence is then synchronized with the first training sequence. The synchronized second training sequence is used to align a receive clock signal of the first device with the data signal received from the second device.

摘要翻译： 公开了一种用于以太网系统的数据辅助定时恢复的方法。 第一设备与第二设备协商伪随机数序列，并从第二设备接收数据信号。 第一设备对接收的数据信号进行采样以恢复第一训练序列。 第一设备还基于伪随机数序列生成第二训练序列。 然后将第二训练序列与第一训练序列同步。 同步的第二训练序列用于将第一设备的接收时钟信号与从第二设备接收的数据信号对准。

公开(公告)号：US09525540B1

公开(公告)日：2016-12-20

申请号：US15017500

申请日：2016-02-05

申请人： QUALCOMM Incorporated

发明人： Stephen Jay Shellhammer ,  Peter Pui Lok Ang ,  Joseph Patrick Burke ,  Tingfang Ji ,  Cong Nguyen ,  Joseph Binamira Soriaga

IPC分类号： H04L7/00 ,  H04L5/00 ,  H04W40/00 ,  H04L27/04 ,  H04L7/04

CPC分类号： H04L7/0012 ,  H04L5/0007 ,  H04L5/0053 ,  H04L7/043 ,  H04L27/0008 ,  H04L27/04 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/2675 ,  H04L27/2692 ,  H04W40/005 ,  H04W52/0229 ,  H04W52/0283 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/21

摘要： When embedding a signal into a selected subcarrier of a multicarrier downlink waveform of regular data/control signaling, a base station modulates the embedded signal with a different modulation scheme than the other data in the downlink waveform. The base station nulls adjacent subcarriers to minimize interference at a low-power wake-up receiver of an IOE device(s). The IOE device wakes up the low-power wake-up receiver at scheduled times to listen for the signal. For synchronization signals, the IOE device corrects a local clock based on a correlation value of the signal to a predetermined sequence. For wake-up signals, the IOE device correlates whatever is detected at the antenna to a predetermined sequence and compares the correlation value to a predetermined threshold. If the threshold is met, the IOE device registers a wake-up signal and wakes the primary transceiver of the device. If not, the receiver goes back to sleep.

摘要翻译： 当将信号嵌入到常规数据/控制信令的多载波下行链路波形的选定子载波中时，基站以与下行链路波形中的其他数据不同的调制方式来调制嵌入信号。 基站使相邻子载波无效以最小化在IOE设备的低功率唤醒接收机处的干扰。 IOE设备在预定时间唤醒低功耗唤醒接收器以监听信号。 对于同步信号，IOE设备基于信号的相关值到预定的序列来校正本地时钟。 对于唤醒信号，IOE设备将在天线处检测到的任何内容与预定序列相关，并将相关值与预定阈值进行比较。 如果满足阈值，IOE设备将注册唤醒信号并唤醒设备的主收发器。 如果没有，接收机返回睡眠状态。

公开(公告)号：US09369271B2

公开(公告)日：2016-06-14

申请号：US14523478

申请日：2014-10-24

申请人： Huawei Technologies Co., Ltd.

发明人： Branislav Popovic

IPC分类号： H04K1/10 ,  H04L27/28 ,  H04L7/04 ,  H04L27/26

CPC分类号： H04L7/043 ,  H04L5/0007 ,  H04L7/041 ,  H04L27/2613 ,  H04L27/2626 ,  H04L27/2649 ,  H04L27/2655 ,  H04L27/2675

摘要： A method is provided for improving synchronization and information transmission in a communication system, including: generating a signal with a centrally symmetric part s(k) exploitable for synchronization; and sending the signal over a communication channel. The signal is based on a uniquely identifiable sequence c(l) from a set of sequences exploitable for information transmission. The centrally symmetric part s(k) is centrally symmetric in the shape of absolute value thereof. The centrally symmetric part s(k) is of arbitrary length N.

摘要翻译： 提供一种用于改善通信系统中的同步和信息传输的方法，包括：产生具有可用于同步的中心对称部分s（k）的信号; 并通过通信信道发送信号。 该信号基于来自可用于信息传输的一组序列的唯一可识别的序列c（1）。 中心对称部分s（k）以其绝对值的形状为中心对称。 中心对称部分s（k）具有任意长度N.