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31. 发明授权

US09444671B2 Antenna direction adjustment method and OFDM reception device 有权
标题翻译：天线方向调整方法和OFDM接收装置
公开(公告)号：US09444671B2
公开(公告)日：2016-09-13
申请号：US14898056
申请日：2014-03-28
申请人： HITACHI KOKUSAI ELECTRIC INC.
发明人： Mikio Fujikura , Tatsuhiro Nakada
IPC分类号： H04L27/26 , H04L27/00 , H04B1/18
CPC分类号： H04L27/2659 , H04B1/18 , H04L5/0023 , H04L5/0048 , H04L27/0008 , H04L27/0012 , H04L27/22 , H04L27/2613 , H04L27/2663 , H04L27/2666 , H04L27/2675 , H04L27/2678 , H04L27/38
摘要： The present invention makes it possible to maintain the continuity of reception detection level and adjust the direction of a reception antenna even under the condition that the reception electric field is low and clock timing synchronization at a C/N ratio of 0 dB or less is lost. QAM modulation including a pilot carrier has higher correlativity in one symbol (1152 samples) correlation, and differential modulation with no pilot has higher correlativity in effective symbol (1024 samples) correction. Detection circuits are provided separately for the QAM modulation and the differential modulation, and in the differential modulation, autocorrelation with a 1024 FFT clock delay signal is performed. The higher of the respective correlation results is selected in the final stage.
摘要翻译：本发明即使在接收电场低的情况下也能够保持接收检测电平的连续性并且调整接收天线的方向，并且C / N比为0dB以下的时钟定时同步丢失。包括导频载波的QAM调制在一个符号（1152个样本）相关中具有更高的相关性，并且没有导频的差分调制在有效符号（1024个样本）校正中具有较高的相关性。针对QAM调制和差分调制分别提供检测电路，并且在差分调制中，执行与1024 FFT时钟延迟信号的自相关。在最后阶段选择相应的相关结果越高。

32. 发明授权

US09414304B2 Method and related mobile device for cell searching with low memory requirement 有权
标题翻译：低存储要求的小区搜索方法及相关移动设备
公开(公告)号：US09414304B2
公开(公告)日：2016-08-09
申请号：US14661439
申请日：2015-03-18
申请人： Intel IP Corporation
发明人： Tian Yan Pu
IPC分类号： H04W48/16 , H04L5/00 , H04W56/00
CPC分类号： H04W48/16 , H04J11/0073 , H04J11/0076 , H04J11/0089 , H04L5/0048 , H04L27/2659 , H04L27/2663 , H04L27/2675 , H04L27/2689 , H04W56/00
摘要： The present solution relates to a method for searching for a cell in a cellular mobile communication system having low memory requirement. The method comprises: receiving in a receiver a signal carrying a reference signal having a first data rate, decimating the signal to generate a down-sampled signal having a second data rate, phase-compensating a phase distortion introduced by the decimating, and correlating the down-sampled signal against a phase-compensated local reference signal or a phase-compensated down-sampled signal against a local reference signal. When buffering the down-sampled signal prior or subsequent to phase-compensating, the buffer size is minimized as 1× oversampling is employed compared to 2× oversampling of current solutions.
摘要翻译：本解决方案涉及用于在具有低存储器要求的蜂窝移动通信系统中搜索小区的方法。该方法包括：在接收机中接收携带具有第一数据速率的参考信号的信号，抽取该信号以产生具有第二数据速率的下采样信号，相位补偿通过抽取引入的相位失真，并将针对相位补偿的本地参考信号或相对于本地参考信号的相位补偿的下采样信号的下采样信号。当在相位补偿之前或之后缓冲下采样信号时，与当前解的2×过采样相比，使用1×过采样时，缓冲器大小被最小化。

33. 发明申请

US20160149742A1 MULTI-WAVEBAND OFDM RECEIVER, AND FREQUENCY OFFSET COMPENSATION METHOD AND SYSTEM 有权
标题翻译：多波段OFDM接收机和频率偏移补偿方法与系统
公开(公告)号：US20160149742A1
公开(公告)日：2016-05-26
申请号：US15010248
申请日：2016-01-29
申请人： Huawei Technologies Co., Ltd.
发明人： Xingwen Yi , Cheng Hong , Huaping Qing
IPC分类号： H04L27/26 , H04J14/02 , H04B10/64 , H04B10/61
CPC分类号： H04L27/2659 , H04B10/615 , H04B10/6164 , H04B10/64 , H04J14/0298 , H04L27/26 , H04L27/2657 , H04L27/2682 , H04L27/2697
摘要： A multi-waveband OFDM receiver and a frequency offset compensation method and system are disclosed. The method includes: performing single waveband frequency offset estimation on an optical comb line of each order; classifying the optical comb lines into a low mutation optical comb line and a high mutation optical comb line; performing joint frequency offset estimation on the low mutation optical comb line; and performing compensation for a frequency offset of a radio frequency drive signal by using an estimated joint frequency offset. The present invention improves accuracy and reliability of the frequency offset estimation of the radio frequency drive signal, so that the degree of the compensation for the frequency offset of the radio frequency drive signal is more comprehensive and accurate.
摘要翻译：公开了一种多波段OFDM接收机和频偏补偿方法及系统。该方法包括：在每个顺序的光梳线上执行单波段频偏估计; 将光梳线分为低突变光梳线和高突变光梳线; 对低突变光梳线进行联合频偏评估; 并通过使用估计的联合频率偏移来对射频驱动信号的频率偏移进行补偿。本发明提高了射频驱动信号的频偏估计的精度和可靠性，使得射频驱动信号的频偏补偿的程度更全面和准确。

34. 发明申请

US20160149741A1 ANTENNA DIRECTION ADJUSTMENT METHOD AND OFDM RECEPTION DEVICE 有权
标题翻译：天线方向调整方法和OFDM接收装置
公开(公告)号：US20160149741A1
公开(公告)日：2016-05-26
申请号：US14898056
申请日：2014-03-28
申请人： HITACHI KOKUSAI ELECTRIC INC.
发明人： Mikio FUJIKURA , Tatsuhiro NAKADA
IPC分类号： H04L27/26 , H04B1/18 , H04L27/00
CPC分类号： H04L27/2659 , H04B1/18 , H04L5/0023 , H04L5/0048 , H04L27/0008 , H04L27/0012 , H04L27/22 , H04L27/2613 , H04L27/2663 , H04L27/2666 , H04L27/2675 , H04L27/2678 , H04L27/38
摘要： The present invention makes it possible to maintain the continuity of reception detection level and adjust the direction of a reception antenna even under the condition that the reception electric field is low and clock timing synchronization at a C/N ratio of 0 dB or less is lost. QAM modulation including a pilot carrier has higher correlativity in one symbol (1152 samples) correlation, and differential modulation with no pilot has higher correlativity in effective symbol (1024 samples) correction. Detection circuits are provided separately for the QAM modulation and the differential modulation, and in the differential modulation, autocorrelation with a 1024 FFT clock delay signal is performed. The higher of the respective correlation results is selected in the final stage.
摘要翻译：本发明即使在接收电场低的情况下也能够保持接收检测电平的连续性并且调整接收天线的方向，并且C / N比为0dB以下的时钟定时同步丢失。包括导频载波的QAM调制在一个符号（1152个样本）相关中具有更高的相关性，并且没有导频的差分调制在有效符号（1024个样本）校正中具有较高的相关性。针对QAM调制和差分调制分别提供检测电路，并且在差分调制中，执行与1024 FFT时钟延迟信号的自相关。在最后阶段选择相应的相关结果越高。

35. 发明申请

US20160119174A1 Method and Apparatus for Identifying Channel Bandwidth and Channel Offset of an Orthogonal Frequency Division Multiplexing Signal 有权
标题翻译：用于识别正交频分复用信号的信道带宽和信道偏移的方法和装置
公开(公告)号：US20160119174A1
公开(公告)日：2016-04-28
申请号：US14521835
申请日：2014-10-23
申请人： Uurmi Systems Private Limited
发明人： Nanda Kishore Chavali , Syed Zeeshan Ismail
IPC分类号： H04L27/26 , H04W24/08
CPC分类号： H04L27/2672 , H04L5/001 , H04L27/2659 , H04L27/2666
摘要： Methods, apparatuses and systems for identifying a channel bandwidth and channel offset of an orthogonal frequency division multiplexing (OFDM) signal. The OFDM signal is received by a receiver apparatus that may be tuned to RF bandwidth of 20 MHz, 40 MHz or 80 MHz. The method utilized by the apparatus includes identifying the location of the primary channel and subsequently determining a sequence of equalized frequency domain sub-symbols of the signal field in the lower and the upper frequency band. Further, a cross-correlation between the sequence of equalized frequency domain sub-symbols is computed along with the computing energy of the sequence of equalized frequency domain sub-symbols. Finally, the cross-correlation and the computed energy are compared for identifying the channel offset and the channel bandwidth.
摘要翻译：用于识别正交频分复用（OFDM）信号的信道带宽和信道偏移的方法，装置和系统。 OFDM信号由可被调谐到20MHz，40MHz或80MHz的RF带宽的接收机设备接收。该装置使用的方法包括识别主信道的位置，随后确定下频段和上频带中信号域的均衡频域子符号序列。此外，均衡频域子符号序列之间的互相关计算与均衡的频域子符号序列的计算能量一起计算。最后，比较互相关和计算能量以识别信道偏移和信道带宽。

36. 发明授权

US09197377B2 Methods and systems for HARQ protocols 有权
标题翻译： HARQ协议的方法和系统
公开(公告)号：US09197377B2
公开(公告)日：2015-11-24
申请号：US14500468
申请日：2014-09-29
申请人： Apple Inc.
发明人： Mo-Han Fong , Sophie Vrzic , Robert Novak , Jun Yuan , Dong-Sheng Yu
IPC分类号： H04L1/18 , H04W72/00 , H04L5/14 , H04W88/04 , H04W88/06 , H04W28/04 , H04W72/04 , H04W72/12
CPC分类号： H04L1/1812 , H04L1/0003 , H04L1/0009 , H04L1/1816 , H04L1/1861 , H04L1/1887 , H04L1/1896 , H04L5/0055 , H04L5/14 , H04L27/2659 , H04L27/2666 , H04W28/04 , H04W72/005 , H04W72/042 , H04W72/044 , H04W72/0446 , H04W72/0453 , H04W72/1257 , H04W72/1268 , H04W88/04 , H04W88/06
摘要： Methods described herein are for wireless communication systems. One aspect of the invention is directed to a method for a HARQ process, in which the HARQ process includes a first transmission of an encoder packet and at least one retransmission. The method involves allocating a transmission resource for each respective transmission. The method involves transmitting control information from a base station to a mobile station for each respective transmission. The control information includes information to uniquely identify the HARQ process and an identification of one of a time resource, a frequency resource and a time and frequency resource that is allocated for the transmission. In some embodiments of the invention, specific control information is signalled from a base station to a mobile station to enable RAS-HARQ operation. In some embodiments of the invention, retransmission signaling in included as part of regular unicast signaling used for both first transmission and retransmissions. In some embodiments of the invention, a 3-state acknowledgement channel and associated error recovery operation enables the base station and mobile station to recover from control signaling error and reduce packet loss.
摘要翻译：本文描述的方法用于无线通信系统。本发明的一个方面涉及一种用于HARQ过程的方法，其中所述HARQ过程包括编码器分组的第一传输和至少一个重传。该方法包括为每个相应的传输分配传输资源。该方法涉及从每个相应传输的基站向移动台发送控制信息。控制信息包括用于唯一地识别HARQ过程的信息和为传输分配的时间资源，频率资源和时间和频率资源之一的标识。在本发明的一些实施例中，从基站向移动台发信号通知特定的控制信息以启用RAS-HARQ操作。在本发明的一些实施例中，包括作为用于第一传输和重传的常规单播信令的一部分的重传信令。在本发明的一些实施例中，3状态确认信道和相关联的错误恢复操作使得基站和移动台能够从控制信令错误中恢复并减少分组丢失。

37. 发明授权

US09160597B2 Method for estimating OFDM integer frequency offset, OFDM integer frequency offset estimator and OFDM receiver system 有权
标题翻译：用于估计OFDM整数频偏的方法，OFDM整数频偏估计器和OFDM接收机系统
公开(公告)号：US09160597B2
公开(公告)日：2015-10-13
申请号：US14546536
申请日：2014-11-18
申请人： Research & Business Foundation SUNGKYUNKWAN UNIVERSITY
发明人： Keun Hong Chae , Seok Ho Yoon
IPC分类号： H04L27/06 , H04L27/26
CPC分类号： H04L27/2646 , H04L27/2657 , H04L27/2659 , H04L27/2672 , H04L27/2675 , H04L27/2688
摘要： A method of estimating an orthogonal frequency division multiplexing (OFDM) integer frequency offset is disclosed. The method includes generating N combined sub-carrier components by superposing G received sub-carrier components of N received sub-carrier components constituting received symbol, outputting a primary estimated integer frequency offset value from a candidate value, which makes primary correlated values, obtained with respect to primary integer frequency offset candidate values, to be largest, and outputting a secondary estimated integer frequency offset value from a secondary candidate value, which makes secondary correlated values, obtained with respect to secondary integer frequency offset candidate values based on primary estimated integer frequency offset value, to be largest.
摘要翻译：公开了一种估计正交频分复用（OFDM）整数频偏的方法。该方法包括通过叠加构成接收符号的N个接收到的子载波分量的G个接收到的子载波分量来产生N个组合子载波分量，从作为主要相关值的候选值输出主估计整数频率偏移值，相对于主要整数频率偏移候选值为最大，并且从次要候选值输出二次估计整数频率偏移值，其使得基于初级估计的整数频率相对于次级整数频率偏移候选值获得的次要相关值补偿值最大。

38. 发明申请

US20150172089A1 METHOD FOR ESTIMATING OFDM INTEGER FREQUENCY OFFSET, OFDM INTEGER FREQUENCY OFFSET ESTIMATOR AND OFDM RECEIVER SYSTEM 有权
标题翻译：用于估计OFDM整数频偏的方法，OFDM整数频偏估计器和OFDM接收机系统
公开(公告)号：US20150172089A1
公开(公告)日：2015-06-18
申请号：US14546536
申请日：2014-11-18
申请人： Research & Business Foundation SUNGKYUNKWAN UNIVERSITY
发明人： Keun Hong CHAE , Seok Ho YOON
IPC分类号： H04L27/26
CPC分类号： H04L27/2646 , H04L27/2657 , H04L27/2659 , H04L27/2672 , H04L27/2675 , H04L27/2688
摘要： A method of estimating an orthogonal frequency division multiplexing (OFDM) integer frequency offset is disclosed. The method includes generating N combined sub-carrier components by superposing G received sub-carrier components of N received sub-carrier components constituting received symbol, outputting a primary estimated integer frequency offset value from a candidate value, which makes primary correlated values, obtained with respect to primary integer frequency offset candidate values, to be largest, and outputting a secondary estimated integer frequency offset value from a secondary candidate value, which makes secondary correlated values, obtained with respect to secondary integer frequency offset candidate values based on primary estimated integer frequency offset value, to be largest.
摘要翻译：公开了一种估计正交频分复用（OFDM）整数频偏的方法。该方法包括通过叠加构成接收符号的N个接收到的子载波分量的G个接收到的子载波分量来产生N个组合子载波分量，从作为主要相关值的候选值输出主估计整数频率偏移值，相对于主要整数频率偏移候选值为最大，并且从次要候选值输出二次估计整数频率偏移值，其使得基于初级估计的整数频率相对于次级整数频率偏移候选值获得的次要相关值补偿值最大。

39. 发明申请

US20140348272A1 CONTROLLABLE FREQUENCY OFFSET FOR INPHASE AND QUADRATURE (IQ) IMBALANCE ESTIMATION 有权
标题翻译：基准和平衡（IQ）不平等估计的可控频率偏移
公开(公告)号：US20140348272A1
公开(公告)日：2014-11-27
申请号：US14459204
申请日：2014-08-13
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Chester Park , Jim Svensson
IPC分类号： H04L27/26
CPC分类号： H04L27/2659 , H04L27/0014 , H04L27/2647 , H04L27/28 , H04L2027/0026
摘要： Embodiments of user equipment and methods for determining IQ imbalance parameters are described. In some embodiments, a method for determining in-phase (I) and Quadrature (Q) imbalance (IQ imbalance) parameters based on a known signal in a dual-carrier receiver using at least one controllable frequency offset includes receiving a known signal modulated onto a first radio frequency (RF) carrier frequency and a second RF carrier frequency different than the first RF carrier frequency. The known signal is downconverted to a baseband signal for the carriers by conversion from the respective RF carrier frequencies to an intermediate frequency (IF) using a common RF local oscillator (LO) and by further conversion from IF to baseband using carrier specific IF LOs, where a controllable frequency offset is used. Any controllable frequency offset is removed from the baseband signal for the first and second carriers to produce representations of the received signals.
摘要翻译：描述用于确定IQ不平衡参数的用户设备和方法的实施例。在一些实施例中，基于使用至少一个可控频率偏移的双载波接收机中的已知信号来确定同相（I）和正交（Q）不平衡（IQ不平衡）参数的方法包括：接收已调制到第一射频（RF）载波频率和与第一RF载波频率不同的第二RF载波频率。已知信号通过使用公共RF本地振荡器（LO）从相应RF载波频率转换到中频（IF）并通过使用载波专用IF LO从IF进一步转换到基带，将载波下转换为基带信号，其中使用可控频率偏移。从第一和第二载波的基带信号中去除任何可控的频偏，以产生接收信号的表示。

40. 发明授权

US08891678B2 Receiving apparatus and receiving method 有权
标题翻译：接收装置和接收方法
公开(公告)号：US08891678B2
公开(公告)日：2014-11-18
申请号：US13839910
申请日：2013-03-15
申请人： Optis Wireless Technology, LLC
发明人： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： H04L27/00 , H04L27/12 , H04L1/06 , H04L27/04 , H04L27/14 , H04B7/04 , H04B7/06 , H04B7/08 , H04L25/02 , H04L27/26
CPC分类号： H04L25/0204 , H04B7/0413 , H04B7/06 , H04B7/0626 , H04B7/0632 , H04B7/0671 , H04B7/0689 , H04B7/0697 , H04B7/082 , H04L1/0618 , H04L5/0023 , H04L5/003 , H04L5/0048 , H04L25/0206 , H04L27/04 , H04L27/06 , H04L27/12 , H04L27/14 , H04L27/18 , H04L27/2601 , H04L27/2602 , H04L27/2627 , H04L27/2649 , H04L27/2657 , H04L27/2659 , H04L27/2691 , H04L27/2695 , H04L69/22 , H04W52/52 , H04W72/0453
摘要： A receiver receives, using a plurality of antennas, a multiplexed signal that includes (i) a first OFDM modulation signal with a subcarrier carrying a symbol including multiplex information and a subcarrier carrying a pilot symbol and a subcarrier carrying a data symbol and (ii) a second OFDM modulation signal with a subcarrier carrying a symbol including multiplex information and a subcarrier carrying the pilot symbol and a subcarrier carrying the data symbol. A decoder uses the symbol including multiplex information and decodes the data symbol.
摘要翻译：接收机使用多个天线接收多路复用信号，该多路复用信号包括：（i）第一OFDM调制信号与携带包含复用信息的符号的副载波和携带导频符号的子载波和携带数据符号的子载波，以及（ii）具有携带包含复用信息的符号的子载波的第二OFDM调制信号和承载导频符号的子载波以及承载数据符号的副载波。解码器使用包括复用信息的符号并对数据符号进行解码。

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