公开(公告)号：US20180159713A1

公开(公告)日：2018-06-07

申请号：US15795683

申请日：2017-10-27

申请人： Nanchong Coolpad Intelligent Technology Company Limited (CN)

发明人： Mingju LI ,  Yajun ZHU ,  Yunfei ZHANG

IPC分类号： H04L27/26 ,  H04L5/00

CPC分类号： H04L27/2666 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/0064 ,  H04L5/0073 ,  H04L5/0078 ,  H04L27/2602 ,  H04L27/2686

摘要： The embodiments of the present disclosure disclose an information transmission method, a base station and a terminal. The method comprises: configuring at least one type of subcarrier spacing of synchronization signal and physical broadcast channel and symbol numbers occupied by the synchronization signal and the physical broadcast channel by a base station, wherein, the subcarrier spacing of the synchronization signal is 15×2m kHz, the subcarrier spacing of the physical broadcast channel is 15×2n kHz, m and n are both integers in a range of 0 to 5; selecting one configuration for sending the synchronization signal and the physical broadcast channel according to a service time delay requirement; determining frequency domain positions and time domain positions of the synchronization signal and the physical broadcast channel, wherein, the frequency domain positions for sending the synchronization signal and the physical broadcast channel are neighboring each other or at least partially overlap, the time domain positions for sending the synchronization signal and the physical broadcast channel are neighboring each other or partially overlap; sending the synchronization signal and the physical broadcast channel to a terminal according to the selected configuration and the determined frequency domain positions and time domain positions. By means of the present disclosure, the time delay of a terminal accessing a communication area can be reduced.

公开(公告)号：US09900184B2

公开(公告)日：2018-02-20

申请号：US15329065

申请日：2014-11-27

申请人： ZTE Corporation

发明人： Jidong Wei ,  Bin Li

IPC分类号： H04L25/02 ,  H04L27/26

CPC分类号： H04L25/0224 ,  H04L27/26 ,  H04L27/2657 ,  H04L27/2671 ,  H04L27/2675 ,  H04L27/2682 ,  H04L27/2686 ,  H04L27/2695

摘要： The present invention provides a method, device and storage medium for frequency offset estimate, and the method for frequency offset estimate comprises: performing initial channel estimate by receiving an Sounding Reference Signal (SRS) or a Preamble code transmitted by a User Equipment (UE) to obtain a first frequency offset estimate value of a current sub-frame of the UE (S101); determining a frequency offset range in which the first frequency offset estimate value is located, and obtaining an initial frequency offset value corresponding to the first frequency offset estimate value according to the preset correspondence between the range of the frequency offset and the initial frequency offset value (S102); determining a phase difference of adjacent pilot positions based on a received pilot sequence included in the current sub-frame, and obtaining a dual pilot frequency offset estimate value according to the phase difference within the range limited by the initial frequency offset value corresponding to the first frequency offset estimate value (S103); and acquiring a frequency offset estimate value of the current sub-frame according to the initial frequency offset value corresponding to the first frequency offset estimate value and the dual pilot frequency offset estimate value (S104).

公开(公告)号：US09887868B2

公开(公告)日：2018-02-06

申请号：US14750390

申请日：2015-06-25

申请人： INTEL IP CORPORATION

发明人： Assaf Kasher

IPC分类号： H04L27/26

CPC分类号： H04L27/2657 ,  H04B1/005 ,  H04L7/00 ,  H04L27/2686

摘要： Various embodiments are generally directed to an apparatus, method and other techniques to determine a first frequency offset for a first band of communication based on one or more packets communicated by a first transceiver, determine a second frequency offset for a second band of communication based on the first frequency offset, and process one or more packets of information communicated on the second band of communication via a second transceiver based on the second frequency offset.

公开(公告)号：US09832063B2

公开(公告)日：2017-11-28

申请号：US13680173

申请日：2012-11-19

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-1 and Preamble-2, which may be used in different systems, including multioutput, multi-input (MIMO) systems.

公开(公告)号：US09831975B2

公开(公告)日：2017-11-28

申请号：US15172463

申请日：2016-06-03

申请人： Imagination Technologies Limited

发明人： Paul Murrin ,  Bastien Beauvois ,  Nitzan Tzifroni

IPC分类号： H04J11/00 ,  H04L29/06 ,  H04W24/08 ,  H04W72/04 ,  H04L27/26

CPC分类号： H04J11/005 ,  H04L27/2607 ,  H04L27/2659 ,  H04L27/2678 ,  H04L27/2686 ,  H04L69/22 ,  H04W24/08 ,  H04W72/0453

摘要： A non-data-aided method of calculating an estimate of the sampling frequency offset (SFO) in a digital receiver involves performing a plurality of correlations between two identical sized groups of samples within a received signal where the spacing of the groups is varied for each correlation. In various examples the number of samples in the groups is also varied. For larger symbols, the group of samples may comprise approximately the same number of samples as the guard interval in a symbol and for smaller symbols, the group of samples may comprise approximately the same number of samples as an entire symbol. An estimate of the SFO is determined by identifying the largest correlation result obtained from all the correlations performed. The largest correlation result indicates the largest correlation.

公开(公告)号：US08340072B2

公开(公告)日：2012-12-25

申请号：US13114579

申请日：2011-05-24

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

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

IPC分类号： H04W72/04

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.

摘要翻译： 本发明提供插入到OFDMA帧中并具有参与传输的所有基站的公共序列的前同步码。 用户站使用公共前导码上的公共序列执行精细同步，并且所得到的峰值将提供候选基站的位置。 然后通过使用基站专用伪噪声序列，在那些峰附近执行基站专用搜索。 通过这两个阶段的单元格搜索，搜索窗口大大减少。 前导码由相应的接收机与已知值匹配以对信号进行解码，并允许多个信号从发射机传送到接收机。 前导码可以包括两个部分，即前导码1和前导码2，其可以在不同的系统中使用，包括多输入多输入（MIMO）系统。

公开(公告)号：US20120287874A1

公开(公告)日：2012-11-15

申请号：US13509710

申请日：2010-11-12

申请人： Kengo Oketani

发明人： Kengo Oketani

IPC分类号： H04W72/04

CPC分类号： H04L27/0014 ,  H04L27/2636 ,  H04L27/2657 ,  H04L27/2672 ,  H04L27/2675 ,  H04L27/2686 ,  H04L2027/0026 ,  H04L2027/0085

摘要： A frequency offset estimation unit estimates a frequency offset by combining information on a maximum window having a maximum peak power obtained from a received PRACH (Physical Random Access Channel) signal and a sign of a phase of a correlation value between channel estimation values obtained from a received PUSCH (Physical Uplink Shared Channel) signal.

摘要翻译： 频率偏移估计单元通过将从接收到的PRACH（物理随机访问信道）信号获得的具有最大峰值功率的最大窗口的信息与从a获得的信道估计值之间的相关值的相位的符号组合信息来估计频率偏移 接收到的PUSCH（Physical Uplink Shared Channel，物理上行链路共享信道）信号。

公开(公告)号：US20080151813A1

公开(公告)日：2008-06-26

申请号：US11645110

申请日：2006-12-22

申请人： Guanbin Xing ,  Manyuan Shen

发明人： Guanbin Xing ,  Manyuan Shen

IPC分类号： H04B7/212

CPC分类号： H04W56/0015 ,  H04J3/0605 ,  H04J3/0682 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2655 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2675 ,  H04L27/2686 ,  H04W92/10

摘要： A system and method of signal detection is provided. A received signal may be correlated with combinations of reference signals, each combination representing a subset of the reference signals, rather than being correlated with each reference signal individually. Once the timing offset has been found, the specific reference signal matching the received signal may be found with a one-dimensional (1D) search. A large 2-D search is thus reduced to a smaller 2-D search followed by a 1-D search. The system and method may be applied to downlink initial acquisition in mobile WiMAX systems.

摘要翻译： 提供了一种信号检测系统和方法。 接收到的信号可以与参考信号的组合相关联，每个组合表示参考信号的子集，而不是分别与每个参考信号相关。 一旦找到定时偏移，可以用一维（1D）搜索找到与接收信号匹配的特定参考信号。 因此，大的2-D搜索被减少到更小的2-D搜索，随后是1-D搜索。 该系统和方法可以应用于移动WiMAX系统中的下行链路初始采集。

公开(公告)号：US07305053B2

公开(公告)日：2007-12-04

申请号：US10494821

申请日：2002-10-31

申请人： Wilhelmus Johannes Van Houtum

发明人： Wilhelmus Johannes Van Houtum

IPC分类号： H04L1/00

CPC分类号： H04L27/2657 ,  H04L27/2613 ,  H04L27/2671 ,  H04L27/2675 ,  H04L27/2686 ,  H04L2027/0046 ,  H04L2027/0065 ,  H04L2027/0095

摘要： A method of detecting frequency errors in a receiver during frame synchronization. A fast synchronization and reliable reception of the data requires a fast determination of frequency errors in the received signal. In CPFSK and OFDM, the frequency offset is even more important because of potential subcarrier interference. The method operates in the time domain and removes the 2p limitation in the phase representation by an unwrap function allowing a precise frequency determination.

摘要翻译： 一种在帧同步期间检测接收机中的频率误差的方法。 数据的快速同步和可靠接收需要快速确定接收信号中的频率误差。 在CPFSK和OFDM中，由于潜在的副载波干扰，频率偏移更为重要。 该方法在时域中操作，并通过允许精确频率确定的展开功能消除相位表示中的2p限制。

公开(公告)号：US20070133699A1

公开(公告)日：2007-06-14

申请号：US11606353

申请日：2006-11-30

申请人： Hee-Jin Roh ,  Su-Jin Yoon ,  Min-Goo Kim

发明人： Hee-Jin Roh ,  Su-Jin Yoon ,  Min-Goo Kim

IPC分类号： H04K1/10

CPC分类号： H04L27/266 ,  H04L27/2659 ,  H04L27/2675 ,  H04L27/2686

摘要： An apparatus and method for recovering a carrier frequency of a received signal using a predefined symbol in an OFDM system is provided. A maximum value detector detects at least three values and their corresponding offsets in descending order among auto-correlation values calculated within a specific frequency offset range between a received signal and a predefined symbol. A frequency offset corrector compares a ratio of a first auto-correlation value to a second auto-correlation value with a predetermined first threshold, determines whether first and second frequency offsets corresponding to the first and second auto-correlation values are adjacent to each other if the ratio of the auto-correlation values is less than the first threshold, and determines an initial carrier frequency offset using a difference between the first frequency offset and a frequency offset correction value determined according to system, if the first and second frequency offsets are adjacent to each other and a ratio of the second auto-correlation value and a third auto-correlation value is greater than a predetermined second threshold.

摘要翻译： 提供了一种用于在OFDM系统中使用预定符号来恢复接收信号的载波频率的装置和方法。 最大值检测器在接收信号和预定义符号之间的特定频率偏移范围内计算的自相关值之中以降序检测至少三个值及其相应的偏移。 频率偏移校正器将第一自相关值与第二自相关值的比率与预定的第一阈值进行比较，确定与第一和第二自相关值对应的第一和第二频率偏移是否彼此相邻如果 所述自相关值的比率小于所述第一阈值，并且如果所述第一和第二频率偏移相邻，则使用根据系统确定的所述第一频率偏移和频率偏移校正值之间的差来确定初始载波频率偏移 并且第二自相关值和第三自相关值的比率大于预定的第二阈值。