公开(公告)号：US20190215877A1

公开(公告)日：2019-07-11

申请号：US16245850

申请日：2019-01-11

申请人： Samsung Electronics Co., Ltd.

发明人： Chen QIAN ,  Qi XIONG ,  Bin YU

IPC分类号： H04W74/08 ,  H04L27/26 ,  H04L27/00

CPC分类号： H04W74/0858 ,  H04L27/0014 ,  H04L27/2659 ,  H04L27/2666 ,  H04L2027/0065 ,  H04L2027/0095

摘要： The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). A method of determining a frequency-domain offset parameter of a preamble in a random access channel and a corresponding user equipment (UE) is provided. The method includes obtaining a random access channel subcarrier spacing ΔfRA, a preamble length LRA and a uplink (UL) channel subcarrier spacing Δf from a base station and determining a frequency-domain offset parameter k of a preamble in a random access channel based on the obtained random access channel subcarrier spacing ΔfRA, preamble length LRA and UL channel subcarrier spacing Δf. Other embodiments of the disclosure further provide a random access method, a method for configuring random access information and related device, and a corresponding computer readable medium.

公开(公告)号：US20180248738A1

公开(公告)日：2018-08-30

申请号：US15871542

申请日：2018-01-15

申请人： NXP B.V.

发明人： Marinus van Splunter ,  Arie Geert Cornelis Koppelaar ,  Frank Leong

IPC分类号： H04L27/26 ,  G01S13/02 ,  G01S13/08

CPC分类号： H04L27/2695 ,  G01S13/0209 ,  G01S13/08 ,  G01S13/765 ,  G01S13/825 ,  G01S13/84 ,  G07C9/00309 ,  H04L27/2659 ,  H04L27/266 ,  H04L27/2662 ,  H04L27/2675 ,  H04L2027/0026 ,  H04L2027/0095

摘要： An apparatus is configured to, based on a first signal comprising one or more data transmission frames received from a first radio device by a second radio device. The first signal has a particular carrier frequency of a carrier wave thereof and the one or more data transmission frames comprising a plurality of symbols provided at a particular symbol frequency. The carrier frequency and symbol frequency based on a reference clock frequency of the first radio device. One or more of an estimate of the particular carrier frequency is determined and an estimate of the particular symbol frequency relative to a reference clock frequency of the second radio device and provide for transmission of a response signal from the second radio device to the first radio device.

公开(公告)号：US20180191487A1

公开(公告)日：2018-07-05

申请号：US15906464

申请日：2018-02-27

申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

发明人： Ansuman Adhikary ,  Niklas Johansson ,  Yi-Pin Eric Wang

IPC分类号： H04L7/00 ,  H04L27/26 ,  H04L27/00 ,  H04W4/06 ,  H04W4/70

CPC分类号： H04L7/0037 ,  H04L27/0014 ,  H04L27/2657 ,  H04L2027/0034 ,  H04L2027/0095 ,  H04W4/06 ,  H04W4/70

摘要： A method in a node is disclosed. The method comprises receiving a signal, and obtaining a first oversampled received signal by sampling the received signal according to a symbol rate. The method further comprises estimating a first frequency offset based on the first oversampled received signal, the first frequency offset estimated using an estimation range limited to one of a bandwidth of the received signal or the symbol rate of the received signal, and obtaining a second oversampled received signal by sampling the received signal according to N times the symbol rate, wherein N is greater than 1. The method further comprises estimating a true frequency offset based on the first frequency offset estimate and the second oversampled received signal.

公开(公告)号：US09954796B2

公开(公告)日：2018-04-24

申请号：US15006822

申请日：2016-01-26

申请人： Echelon Corporation

发明人： Walter J. Downey

IPC分类号： H04L12/911 ,  H04L1/00 ,  H04L27/26 ,  H04L27/233 ,  H04B3/54 ,  H04J11/00 ,  H04L27/22 ,  H04L27/00

CPC分类号： H04L47/822 ,  H04B3/542 ,  H04J11/00 ,  H04L1/0039 ,  H04L27/22 ,  H04L27/233 ,  H04L27/2613 ,  H04L27/2649 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2692 ,  H04L2027/0095

摘要： A method is disclosed for detecting packet at a receiving system in a Multi-Carrier Modulation (MCM) system. The method starts with receiving a signal at the receiving system. Then during the plurality of symbol durations, a set of phases of the signal for each symbol duration is obtained, where each phase is a phase of a carrier of the number of carriers. Then a set of phase variances for each carrier of the number of carriers is obtained, where each phase variance is a difference of phases of a carrier in different symbol durations. Then a phase variance value based on the set of phase variances is computed and it is compared with a threshold to determine whether a packet has been detected from the received signal.

公开(公告)号：US20170373976A1

公开(公告)日：2017-12-28

申请号：US15539822

申请日：2015-01-27

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： Miguel Lopez ,  Bo Hagerman

IPC分类号： H04L12/801 ,  H04W4/00 ,  H04W84/12 ,  H04B7/04 ,  H04L27/00

CPC分类号： H04W4/38 ,  H04B7/04 ,  H04L47/10 ,  H04L2027/0095 ,  H04W4/06 ,  H04W84/12

摘要： A radio network node, e.g. an Access Point, and wireless devices are comprised in a Wireless Local Area Network. The radio network node is configured to: Identify wireless devices associated with common properties of one or more predetermined property types. Obtain data intended for transmission to the identified wireless devices, where different parts of the data is intended for transmission to different wireless devices. Form a single data packet based on said common properties and comprising the obtained data. The single data packet is associated with a packet type directed to deliver data to only a single wireless device. Transmit the single data packet on a communication channel being accessed by all of the identified wireless devices.

公开(公告)号：US09729366B2

公开(公告)日：2017-08-08

申请号：US14783806

申请日：2014-04-09

申请人： NORDIC SEMICONDUCTOR ASA

发明人： Sverre Wichlund ,  Eivind Sjogren Olsen

IPC分类号： H04L27/233 ,  H04L27/00

CPC分类号： H04L27/2334 ,  H04L27/2332 ,  H04L2027/003 ,  H04L2027/0057 ,  H04L2027/0065 ,  H04L2027/0085 ,  H04L2027/0095

摘要： A digital radio receiver adapted to receive radio signals modulated using continuous phase frequency shift keying, CPFSK. The receiver comprises means for receiving a radio signal (2), a correlator (8) arranged to estimate a frequency offset between the carrier frequency of the received radio signal and a nominal carrier frequency, means for correcting said frequency offset (4) and outputting a frequency-corrected radio signal (6), and a matched filter bank, MFB, which comprises a plurality of filters (20,22), each of which corresponds to a different bit pattern, for determining a bit sequence (36) from the frequency-corrected radio signal (6).

公开(公告)号：US20160381581A1

公开(公告)日：2016-12-29

申请号：US14835437

申请日：2015-08-25

申请人： FREESCALE SEMICONDUCTOR, INC.

发明人： MIHAI-IONUT STANCIU ,  RAJA V. TAMMA ,  KHURRAM WAHEED

IPC分类号： H04W24/08 ,  H04L5/00

CPC分类号： H04L5/0048 ,  H04L27/0014 ,  H04L27/22 ,  H04L2027/003 ,  H04L2027/0034 ,  H04L2027/0048 ,  H04L2027/0095 ,  H04W84/12

摘要： Methods and system for carrier frequency offset (CFO) estimation are described. The method includes determining correlation values between a plurality of samples from a received signal and a plurality of reference signals corresponding to a plurality of CFO candidates. A set of correlation values which exceeds a threshold is determined and a corresponding CFO candidate for each correlation value in the set is selected. A CFO estimate based on an interpolation of selected CFO candidates is then calculated.

摘要翻译： 描述载波频率偏移（CFO）估计的方法和系统。 该方法包括从接收到的信号和对应于多个CFO候选的多个参考信号确定多个样本之间的相关值。 确定超过阈值的一组相关值，并且选择该集合中的每个相关值的对应的CFO候选。 然后计算基于所选CFO候选的内插的CFO估计。

公开(公告)号：US09461855B2

公开(公告)日：2016-10-04

申请号：US13730993

申请日：2012-12-29

申请人： Intel Corporation

发明人： Thomas J. Kenney ,  Eldad Perahia ,  Shahrnaz Azizi

IPC分类号： H04L27/22 ,  H04L27/26 ,  H04L5/00 ,  H04L25/02 ,  H04L25/03

CPC分类号： H04L27/22 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/006 ,  H04L5/0085 ,  H04L5/0094 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/0226 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2694 ,  H04L27/2695 ,  H04L2025/0377 ,  H04L2027/0026 ,  H04L2027/0095

摘要： Pilot logic may determine based upon channel and phase information how to process pilot tones that shift locations every N symbols in an orthogonal frequency division multiplexing (OFDM) packet transmission. Pilot logic may determine a signal-to-noise ratio (SNR) for the channel to determine how to process the shifting pilot tones. Pilot logic may also determine channel and phase information updates such as channel state information and phase correction information from pilot tones. In situations of high SNR, logic may use channel estimates and phase rotations that are obtained from locations of the pilot tones for phase tracking and updating the equalizer. In situations of low SNR, logic may use the phase rotations for phase tracking and not update the equalizer during the OFDM transmission. Logic may also determine the presence or absence of a Doppler effect on the transmission and transmit a selection for N to an access point in response.

摘要翻译： 导频逻辑可以基于信道和相位信息来确定如何处理在正交频分复用（OFDM）分组传输中每N个符号移位位置的导频音调。 导频逻辑可以确定信道的信噪比（SNR）以确定如何处理移位导频音。 导频逻辑还可以确定信道和相位信息更新，例如来自导频音调的信道状态信息和相位校正信息。 在高SNR的情况下，逻辑可以使用从用于相位跟踪和更新均衡器的导频音调的位置获得的信道估计和相位旋转。 在低SNR的情况下，逻辑可以使用相位旋转进行相位跟踪，并且在OFDM传输期间不更新均衡器。 逻辑还可以确定对传输的多普勒效应的存在或不存在，并且响应地将N的选择发送到接入点。

公开(公告)号：US09363128B2

公开(公告)日：2016-06-07

申请号：US13838211

申请日：2013-03-15

申请人： Echelon Corporation

发明人： Walter J. Downey

IPC分类号： H04L27/06 ,  H04L27/26 ,  H04L1/00 ,  H04L27/233

CPC分类号： H04L47/822 ,  H04B3/542 ,  H04J11/00 ,  H04L1/0039 ,  H04L27/22 ,  H04L27/233 ,  H04L27/2613 ,  H04L27/2649 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2692 ,  H04L2027/0095

摘要： A method is disclosed for detecting packet at a receiving system in a Multi-Carrier Modulation (MCM) system. The method starts with receiving a signal at the receiving system. Then during the plurality of symbol durations, a set of phases of the signal for each symbol duration is obtained, where each phase is a phase of a carrier of the number of carriers. Then a set of phase variances for each carrier of the number of carriers is obtained, where each phase variance is a difference of phases of a carrier in different symbol durations. Then a phase variance value based on the set of phase variances is computed and it is compared with a threshold to determine whether a packet has been detected from the received signal.

摘要翻译： 公开了一种用于在多载波调制（MCM）系统中的接收系统处检测分组的方法。 该方法从接收系统接收信号开始。 然后在多个符号持续时间期间，获得每个符号持续时间的信号的一组相位，其中每个相位是载波数量的载波的相位。 然后，获得载波数量的每个载波的一组相位方差，其中每个相位方差是不同符号持续时间内载波的相位差。 然后计算基于相位方差集合的相位方差值，并将其与阈值进行比较，以确定是否已经从接收到的信号中检测到分组。

公开(公告)号：US20160142064A1

公开(公告)日：2016-05-19

申请号：US14233352

申请日：2012-06-28

申请人： Intel Mobile Communications GmbH

发明人： Yanzeng Fu ,  Yunshuai Tang ,  Hong Zhang ,  Zhen Wang ,  Zhe Xu ,  Jie Lei

IPC分类号： H03L7/099 ,  H04B17/20 ,  H04L27/26

CPC分类号： H03L7/099 ,  H03J7/04 ,  H04B17/20 ,  H04L25/4902 ,  H04L27/0014 ,  H04L27/2672 ,  H04L2027/0055 ,  H04L2027/0073 ,  H04L2027/0095

摘要： An automatic frequency control device, a method for automatic frequency control, a receiver, a mobile station and a non-transitory computer-readable digital storage medium are provided. The automatic frequency control device may include a quality calculation unit to calculate quality of a received signal, a state machine controller to generate a control signal based on the calculated quality of the received signal, and a filter to filter an estimated frequency offset of the received signal based on the control signal.

摘要翻译： 提供了一种自动频率控制装置，一种自动频率控制方法，一种接收机，一种移动台和一种非暂时的计算机可读数字存储介质。 自动频率控制装置可以包括：质量计算单元，用于计算接收信号的质量;状态机控制器;基于所计算出的接收信号质量来生成控制信号;滤波器，用于对接收到的信号的估计频率偏移进行滤波 基于控制信号的信号。