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81. 发明申请

US20170354349A1 WIFI-BASED PERSON-IDENTIFICATION TECHNIQUE FOR USE IN SMART SPACES 审中-公开
公开(公告)号：US20170354349A1
公开(公告)日：2017-12-14
申请号：US15611545
申请日：2017-06-01
申请人： The Regents of the University of California
发明人： Prasant Mohapatra , Parth H. Pathak , Yunze Zeng
IPC分类号： A61B5/117 , A61B5/00 , H04L27/26 , H04W28/04 , H04L29/08 , H04B7/06 , A61B5/11 , H04W84/12
CPC分类号： A61B5/117 , A61B5/0022 , A61B5/112 , A61B5/7203 , A61B5/7257 , A61B2562/0219 , H04B7/0626 , H04L27/261 , H04L27/265 , H04L27/2671 , H04L27/2672 , H04L67/22 , H04L67/306 , H04W4/33 , H04W4/70 , H04W84/12
摘要： The disclosed embodiments relate to the design of a system that identifies a person. During operation, the system receives channel state information (CSI) for a set of orthogonal frequency division modulation (OFDM) subcarriers while the person moves in a region that includes two or more nodes that use the set of OFDM subcarriers to communicate with one another. Next, the system analyzes the CSI to obtain an analysis result. The system then determines the identity of the person based on the analysis result.

82. 发明授权

US09763209B2 Interference-tolerant multi-band synchronizer 有权
公开(公告)号：US09763209B2
公开(公告)日：2017-09-12
申请号：US14837252
申请日：2015-08-27
申请人： xG Technology, Inc.
发明人： Stephen R. Carsello
IPC分类号： H04W56/00 , H04L5/00 , H04B7/04 , H04L27/26
CPC分类号： H04W56/003 , H04B7/04 , H04L5/001 , H04L5/0023 , H04L27/2663 , H04L27/2672 , H04L27/2688 , H04L27/2691
摘要： A multi-band synchronizer that performs robustly in the presence of partial-band interference by breaking down the correlation of a sync waveform at a plurality of times, with one or more received signal branches into a multitude of sub-band correlations, and combining the sub-band correlations such that the impact of partial-band interference on synchronization performance is significantly mitigated is disclosed.

83. 发明申请

US20170237597A1 METHOD OF PROCESSING WCDMA SIGNAL TIMING OFFSET FOR SIGNAL ANALYZING EQUIPMENT 有权
公开(公告)号：US20170237597A1
公开(公告)日：2017-08-17
申请号：US15050078
申请日：2016-02-22
申请人： INNOWIRELESS CO., LTD.
发明人： Jin Soup JOUNG , Joo Hyeong LEE , Yong Hoon LIM , Kyoung Hwan JU
IPC分类号： H04L27/26 , H04B1/7087 , H04L5/00
CPC分类号： H04L27/2656 , H04B1/7073 , H04B1/7087 , H04L5/0021 , H04L27/2672 , H04L27/2675
摘要： Provided is a method of processing a WCDMA signal timing offset for a signal analyzer. The method includes estimating an integer multiple timing offset of WCDMA baseband sample data corresponding to an amount of at least one frame; generating a frequency domain signal which is time delayed corresponding to a fractional timing offset estimation resolution after generating the frequency domain signal by performing an FFT calculation on an already-known reference signal; converting each time-delayed frequency domain signal into a time domain signal by performing an IFFT calculation on each time-delayed frequency domain signal and calculating a correlation between an input signal from a position of the integer multiple timing offset and the time domain signal; and estimating a delay time leading to a maximum correlation as a fractional timing offset.

84. 发明授权

US09712316B2 Reception apparatus, phase error estimation method, and phase error correction method 有权
公开(公告)号：US09712316B2
公开(公告)日：2017-07-18
申请号：US14770406
申请日：2014-02-20
申请人： Panasonic Corporation
发明人： Yoshinori Shirakawa , Koichiro Tanaka , Takenori Sakamoto
IPC分类号： H04L7/00 , H04L27/22 , H04L27/26 , H04L7/04
CPC分类号： H04L7/0041 , H04L7/0054 , H04L7/04 , H04L27/22 , H04L27/2657 , H04L27/2672 , H04L27/2675
摘要： In a phase error corrector, a signal extractor extracts received reference signals from received signals, and an error vector calculator calculates the error vectors of phase errors by comparing the extracted received reference signals with a known reference signal that is to be transmitted. A representative vector calculator divides, according to frequency, the error vectors into two or more groups and calculates representative vectors for the respective groups. A correction value calculator calculates, on the basis of the representative vectors, phase correction values for the respective frequencies. A phase corrector uses the calculated phase correction values to correct the phase errors for the respective frequencies.

85. 发明申请

US20170180179A1 SINGLE STREAM PHASE TRACKING DURING CHANNEL ESTIMATION IN A VERY HIGH THROUGHPUT WIRELESS MIMO COMMUNICATION SYSTEM 有权
公开(公告)号：US20170180179A1
公开(公告)日：2017-06-22
申请号：US15450773
申请日：2017-03-06
申请人： QUALCOMM Incorporated
发明人： Kai Shi , Ning Zhang
IPC分类号： H04L27/26 , H04L25/02 , H04B7/0413
CPC分类号： H04L5/0048 , H04B7/0413 , H04B7/0421 , H04L25/0204 , H04L25/0224 , H04L25/023 , H04L27/2657 , H04L27/2672 , H04L27/2675 , H04L27/2695
摘要： In MIMO a wireless node's receive chain demodulation function is enhanced to include phase tracking using very high-throughput long training fields (VHT-LTFs) embedded in a frame preamble. Single stream pilot tones are added during transmission of VHT-LTFs. A receiver estimates the channel using the pilot tones in a first set of VHT-LTFs, and estimates the phase of the pilot tones using a second set of VHT-LTFs. The phase estimation receiver estimates the channel using the pilot tones in a first set of VHT-LTFs. The phase estimation is continuously applied to other received data tones throughout the VHT-LTFs of data symbols. Phase errors due to PLL mismatches and phase noise are reduced at reception, leading to better signal to noise ratio for different levels of drift and frequency offset.

86. 发明申请

US20170126460A1 RADIO COMMUNICATIONS SYSTEM AND METHOD WITH INCREASED TRANSMISSION CAPACITY BASED ON FREQUENCY TWISTED WAVES 有权
公开(公告)号：US20170126460A1
公开(公告)日：2017-05-04
申请号：US15317577
申请日：2015-06-10
申请人： EUTELSAT S A
发明人： Jacques DUTRONC , Antonio SAITTO
IPC分类号： H04L27/26 , H04L5/00
CPC分类号： H04L27/2659 , H04B7/0413 , H04L5/0007 , H04L5/0048 , H04L27/2601 , H04L27/2634 , H04L27/2639 , H04L27/266 , H04L27/2666 , H04L27/2671 , H04L27/2672 , H04L27/2678 , H04L27/2697
摘要： A method of implementing Orbital Angular Momentum (OAM) for radio communications in general and LTE in particular. Common prior art so far recreate the vorticity (axial rotation of the Poynting vector) by using ring-shaped antenna arrays. This application proposes to create the vorticity in signal processing without the need of any space diversity (i.e. work with a single antenna). An Hilbert transform is applied in frequency domain to the Fourier transform of the analytical representation of a band-limited OFDM signal. The Hilbert transform is then approximated by a development in series into orthogonal twisted modes. This can be seen as an inverse Fourier transform of the complex analytical signal. Therefore an OAM IFFT based transmitter is proposed where parallel IFFTs are performed for each OAM mode and superimposed.

87. 发明授权

US09596118B2 FBMC receiver using a method for synchronization in a frequency domain 有权
标题翻译： FBMC接收机使用频域同步的方法
公开(公告)号：US09596118B2
公开(公告)日：2017-03-14
申请号：US14771394
申请日：2014-03-11
申请人： Commissariat a l'energie atomique et aux energies alternatives
发明人： Jean-Baptiste Dore , Vincent Berg
IPC分类号： H04L27/26 , H04L27/38 , H04L27/36
CPC分类号： H04L27/264 , H04L27/2652 , H04L27/2663 , H04L27/2665 , H04L27/2672 , H04L27/2675 , H04L27/2684 , H04L27/2691 , H04L27/362 , H04L27/38
摘要： A filter bank multi-carrier (FBMC) receiver implementing a synchronization in the frequency domain. The receiver includes a synchronization module including an error estimator on the sampling instants and, for each subcarrier, an interpolating filter for reconstructing the samples at the accurate sampling instants. A phase-shifter is provided, for each subcarrier, at the output of the interpolating filter, to make a phase compensation. The phase-shifter can be followed by an equalizer in the frequency domain.
摘要翻译：实现频域同步的滤波器组多载波（FBMC）接收机。接收机包括同步模块，该模块包括采样时刻上的误差估计器，并且对于每个子载波，包括用于在精确采样时刻重建采样的内插滤波器。针对每个子载波，在内插滤波器的输出处提供移相器进行相位补偿。移相器后面可以是频率域中的均衡器。

88. 发明授权

US09584245B2 Non-coherent neighbor cell searching method 有权
标题翻译：非相干相邻小区搜索方法
公开(公告)号：US09584245B2
公开(公告)日：2017-02-28
申请号：US14226196
申请日：2014-03-26
申请人： National Central University
发明人： Pei-Yun Tsai , Shun-Fang Liu
IPC分类号： H04L27/26 , H04J11/00
CPC分类号： H04J11/0076 , H04J11/004 , H04J11/0093 , H04L27/2657 , H04L27/2668 , H04L27/2672 , H04L27/2692
摘要： The present invention relates to a non-coherent neighbor cell search method for primary synchronization signal (PSS) and secondary synchronization signal (SSS). In order to eliminate the channel response of the home cell, the present invention utilizes the similarity of channel responses at adjacent subcarriers, components at the kth subcarrier and the (k+1)th subcarrier of the received signal are respectively multiplied by the conjugation of the corresponding local synchronization signal to respectively obtain the kth product and the (k+1)th product. Afterward, a combination signal is obtained by examining the difference of the kth product and the (k+1)th product. By mathematical simplification and analysis, the main unknown component of the combination signal is the synchronization signal of neighbor cell, also in a compound form. Thus, the neighbor cell ID can be obtained by performing the correlation operation of the combination signal to the compound reference sequence.
摘要翻译：本发明涉及用于主同步信号（PSS）和次同步信号（SSS）的非相干相邻小区搜索方法。为了消除家庭小区的信道响应，本发明利用相邻子载波的信道响应的相似性，第k个子载波的分量和接收信号的第（k + 1）个子载波分别乘以相应的本地同步信号分别获得第k个乘积和第（k + 1）个乘积。之后，通过检查第k个乘积和第（k + 1）个乘积的差异来获得组合信号。通过数学简化和分析，组合信号的主要未知分量是相邻单元的同步信号，也是复合形式。因此，可以通过执行组合信号与复合参考序列的相关操作来获得相邻小区ID。

89. 发明申请

US20170041028A1 SYSTEMS AND METHODS FOR IMPROVING WLAN RANGE 有权
标题翻译：改善WLAN范围的系统和方法
公开(公告)号：US20170041028A1
公开(公告)日：2017-02-09
申请号：US15332970
申请日：2016-10-24
申请人： NETGEAR, INC.
发明人： Joseph Amalan Arul EMMANUEL , Peiman AMINI , Paul NYSEN , Shun-Liang YU , Chia-Wei LIU , Shahrokh ZARDOSHTI , Gin WANG , Henry CHEN
IPC分类号： H04B1/00 , H04L27/26
CPC分类号： H04B1/005 , H04B1/0096 , H04B2001/0491 , H04L27/2672 , H04W84/12
摘要： Various embodiments disclose systems and methods for employing a Sub1G signal (e.g. a signal in the range of approximately 500 Mhz or 800 mHz) for use with internal and/or external components of various user devices. The Sub1G region may provide a path loss advantage over traditional 2.4 and 5 Ghz systems because of the lower frequency in free-space path loss model. Sub1G may also present less interference compared to 2.4 GHz (e.g., better QoS for applications such as VOIP, Gaining, etc.). In some of the disclosed embodiments, Sub1G may be employed using current 2.4G or 5G Wireless LAN chipset with RF Up/Down Converters. In some embodiments, the Sub1G approach may be used to create a Long Range Bridge, Long Range Extender, Long Range Client, Long Range Hotspot, etc.
摘要翻译：各种实施例公开了用于使用与各种用户装置的内部和/或外部组件一起使用的Sub1G信号（例如，大约500Mhz或800mHz的信号）的系统和方法。由于自由空间路径损耗模型的频率较低，Sub1G区域可能比传统的2.4和5 GHz系统提供路径损耗优势。与2.4GHz相比，Sub1G还可以呈现更少的干扰（例如，对于诸如VOIP，Gaining等应用的更好的QoS）。在一些所公开的实施例中，可以使用具有RF上/下转换器的当前2.4G或5G无线LAN芯片组来采用Sub1G。在一些实施例中，Sub1G方法可用于创建长距离桥，长距离扩展器，远程客户端，远程热点等。

90. 发明授权

US09537702B2 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：US09537702B2
公开(公告)日：2017-01-03
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 , H04L5/00
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。

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