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1. 发明申请

US20180183647A1 METHODS AND DEVICES FOR CHANNEL ESTIMATION 审中-公开
公开(公告)号：US20180183647A1
公开(公告)日：2018-06-28
申请号：US15390785
申请日：2016-12-27
申请人： Intel IP Corporation
发明人： Maxime Monin , Lea Castel , Tommaso Balercia
IPC分类号： H04L27/26 , H04L5/00 , H04W24/02
CPC分类号： H04W24/02 , H04B7/0854 , H04L5/0007 , H04L25/022 , H04L25/0224 , H04L25/024
摘要： A device and method for performing channel estimation, including in a first iteration of channel estimation, determining a channel estimate based on at least a first pilot symbol of a reference signal received at the device; and in each respective iteration of one or more ensuing iterations determining a reference channel estimate based on at least one subsequent pilot symbol of the reference signal; decoding a data signal received at the device based on the reference channel estimate; determining a data channel estimate based on at least one data symbol from the decoded data signal; and calculating a channel estimate for the respective iteration based on the reference channel estimate, the data channel estimate, and a channel estimate from a previous iteration.

2. 发明申请

US20180167123A1 SOFT CHANNEL TRACKING USING DETECTION OUTPUT 审中-公开
公开(公告)号：US20180167123A1
公开(公告)日：2018-06-14
申请号：US15447899
申请日：2017-03-02
申请人： Samsung Electronics Co., Ltd.
发明人： Hongbing CHENG , Ruchen DUAN , Jungwon LEE
IPC分类号： H04B7/06 , H04L5/00 , H04L1/00
CPC分类号： H04L1/0054 , H04L5/006 , H04L25/0224 , H04L25/024 , H04L25/067
摘要： A method and apparatus are provided. The method includes receiving, by a user equipment (UE), a first signal from a transceiver, determining one of a probability and a soft mean with a soft variance associated with the detected data symbol, determining a first coefficient and a second coefficient based on the determined one of the probability and the soft mean with the soft variance associated with the detected data symbol, determining channel state information (CSI) on a channel between the transceiver and the UE based on a second signal received by the UE from the transceiver, a previous CSI, the first coefficient and the second coefficient, and tracking the communication channel based on the determined CSI.

3. 发明申请

US20170155527A1 CHANNEL ESTIMATION FOR WIRELESS SYSTEMS WITHOUT MATRIX INVERSION 审中-公开
公开(公告)号：US20170155527A1
公开(公告)日：2017-06-01
申请号：US15430096
申请日：2017-02-10
申请人： Sony Corporation
发明人： Geoffrey Ye LI
IPC分类号： H04L25/02
CPC分类号： H04L25/024 , H04L1/06 , H04L7/0008 , H04L25/0206 , H04L25/0226 , H04L25/0228 , H04L27/2601 , H04L27/261 , H04L27/2613
摘要： In various embodiments, techniques are provided to determine channel characteristics of various communication systems such as OFDM systems or systems using a plurality of transmit antennas by using various sets of training symbols that produce zero cross-correlation energy. Channel communication can accordingly be simplified as the zero cross-correlation property allows for channel estimation without a matrix inversion.

4. 发明授权

US09654312B2 Layered detection method and apparatus for QAM-FBMC system 有权
公开(公告)号：US09654312B2
公开(公告)日：2017-05-16
申请号：US14802540
申请日：2015-07-17
申请人： Samsung Electronics Co., Ltd. , Industry-Academic Cooperation Foundation, Yonsei University
发明人： Dongkyu Sim , Chungyong Lee , Taeyoung Kim
IPC分类号： H04B1/10 , H04B15/00 , H04L25/03 , H04J11/00 , H04L25/02
CPC分类号： H04L25/03159 , H04J11/0023 , H04L25/0224 , H04L25/024
摘要： The present invention relates to a frequency region equalization method and an apparatus therefor in a cellular environment on the basis of a QAM-FBMC system. A method for receiving a signal by a receiver according to one embodiment of the present invention may include: performing channel estimation; comparing a minimum channel gain with a predetermined first threshold value; and performing layered detection when the minimum channel gain is smaller than the first threshold value. According to one embodiment of the present invention, a gain can be acquired in terms of a BER even while a structure of a symbol level equalizer is maintained.

5. 发明授权

US09544167B2 Methods and apparatus for monitoring occupancy of wideband GHz spectrum and sensing and decoding respective frequency components of time-varying signals using sub-nyquist criterion signal sampling 有权
标题翻译：用于监视宽带GHz频谱的占用的方法和装置，并且使用次尼基准则信号采样来感测和解码时变信号的各个频率分量
公开(公告)号：US09544167B2
公开(公告)日：2017-01-10
申请号：US14548231
申请日：2014-11-19
申请人： Dina Katabi , Haitham Z. Al-Hassanieh , Lixin Shi , Omid Salehi-Abari , Ezzeldin Hamed
发明人： Dina Katabi , Haitham Z. Al-Hassanieh , Lixin Shi , Omid Salehi-Abari , Ezzeldin Hamed
IPC分类号： H04B1/66 , H04L25/02 , H04B1/16 , H04W16/14
CPC分类号： H04L25/024 , G01P3/489 , H04B1/16 , H04B1/40 , H04L25/03038 , H04L27/0006 , H04L27/263 , H04L27/265 , H04L27/2666 , H04W16/14
摘要： Methods and apparatus for monitoring wideband GHz spectrum for wireless communication, and sensing and decoding respective frequency components of a time-varying signal corresponding to the monitored spectrum. Concepts relating to sparse Fast Fourier Transform (sFFT) techniques facilitate identification of one or more frequency components of a sparsely occupied spectrum by sub-sampling the signal corresponding to the monitored spectrum at a sampling rate below the Nyquist criterion. The disclosed methods and apparatus may be implemented using conventional relatively low-power wireless receivers and using off-the-shelf relatively inexpensive low-speed and low-power analog-to-digital converters (ADCs) typically employed in WiFi devices or cellular phones, in tandem with unique processing techniques based on sFFTs and sub-Nyquist criterion sampling, and have demonstrated efficacy even in scenarios where the monitored spectrum is not sparse.
摘要翻译：用于监测用于无线通信的宽带GHz频谱的方法和装置，以及感测和解码对应于所监视的频谱的时变信号的各个频率分量。与稀疏快速傅立叶变换（sFFT）技术有关的概念通过以低于奈奎斯特准则的采样率对与监测光谱相对应的信号进行子采样，从而有助于识别稀疏占用频谱的一个或多个频率分量。所公开的方法和装置可以使用传统的相对低功率的无线接收机来实现，并且使用通常在WiFi设备或蜂窝电话中使用的现成的相对便宜的低速和低功率模数转换器（ADC）与基于sFFT和亚奈奎斯特准则抽样的独特处理技术相结合，并且即使在监测频谱不稀疏的情况下也已经证明了效果。

6. 发明申请

US20160248604A1 CHANNEL ESTIMATION METHOD, APPARATUS, AND DEVICE AND MULTICHANNEL MICROWAVE COMMUNICATIONS SYSTEM 有权
标题翻译：信道估计方法，装置和设备以及多通道微波通信系统
公开(公告)号：US20160248604A1
公开(公告)日：2016-08-25
申请号：US15142472
申请日：2016-04-29
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： Rui LV
IPC分类号： H04L25/02 , H04B7/06
CPC分类号： H04L25/0204 , H04B7/0413 , H04B7/0617 , H04L25/0224 , H04L25/024 , H04L25/0244
摘要： The present invention discloses a channel estimation method, apparatus, and device and a multichannel microwave communications system. According to the channel estimation method, a first vector group corresponding to a transmit end and a second vector group corresponding to a receive end are first obtained according to a transmit-receive array size; then a subchannel estimation procedure is performed multiple times according to the transmit-receive array size, the first vector group, and the second vector group, to obtain multiple corresponding subchannel estimated coefficients; and finally, a real channel matrix is determined according to the first vector group, the second vector group, and an estimation matrix consisting of the multiple subchannel estimated coefficients.
摘要翻译：本发明公开了一种信道估计方法，装置和装置以及多通道微波通信系统。根据信道估计方法，首先根据发射接收阵列大小获得对应于发射端的第一矢量组和对应于接收端的第二矢量组; 然后根据发射 - 接收阵列大小，第一矢量组和第二矢量组多次执行子信道估计过程，以获得多个对应的子信道估计系数; 最后，根据第一矢量组，第二矢量组和由多个子信道估计系数组成的估计矩阵来确定实数信道矩阵。

7. 发明申请

US20160234761A1 METHOD AND APPARATUS FOR PERFORMING CELL SEARCH AND FREQUENCY OFFSET ESTIMATION 有权
标题翻译：用于执行细胞搜索和频率偏移估计的方法和装置
公开(公告)号：US20160234761A1
公开(公告)日：2016-08-11
申请号：US14750413
申请日：2015-06-25
申请人： Samsung Electronics Co., Ltd.
发明人： Dah-Hae CHONG , Ho-II KIM , Soo-Bok YEO , Min-Goo KIM , Chae-Hag YI
IPC分类号： H04W48/16 , H04L25/02
CPC分类号： H04L25/024 , H04J11/0069 , H04L27/0014 , H04L2027/0026
摘要： Methods and apparatuses are provided for performing a cell search by a receiver in a communication system. A scrambling code is identified by correlating a common pilot channel with a first synchronization accumulation length based on a frame boundary and a code group. A multipath signal is sought by correlating the common pilot channel with a second synchronization accumulation length based on the frame boundary and the code group. A difference between, or a ratio of, a first maximum value of first correlation values acquired during identification of the scrambling code and a second maximum value of second correlation values acquired during searching for the multipath signal, is determined. It is determined whether a frequency offset exists by comparing the difference or the ratio with a predetermined threshold value. The frequency offset is estimated and the frequency offset is transmitted to a demodulator, when the frequency offset exists.
摘要翻译：提供了用于在通信系统中由接收机执行小区搜索的方法和装置。通过基于帧边界和码组将公共导频信道与第一同步累加长度相关联来识别扰码。通过基于帧边界和代码组将公共导频信道与第二同步累加长度相关联来寻求多径信号。确定在识别扰码期间获取的第一相关值的第一最大值与在搜索多路径信号期间获取的第二相关值的第二最大值之间的差异或比率。通过将差异或比率与预定阈值进行比较来确定是否存在频率偏移。当频率偏移存在时，估计频率偏移并将频率偏移传输到解调器。

8. 发明授权

US09350585B2 Method and device for channel estimation, and corresponding computer program product 有权
标题翻译：信道估计方法和设备，以及相应的计算机程序产品
公开(公告)号：US09350585B2
公开(公告)日：2016-05-24
申请号：US14714937
申请日：2015-05-18
申请人： STMicroelectronics S.r.l.
发明人： Massimiliano Siti , Antonio Assalini , Silvano Pupolin
IPC分类号： H04B7/02 , H04L1/02 , H04L27/26 , H04L25/02 , H04B7/04
CPC分类号： H04L27/2649 , H04B7/0456 , H04L25/0204 , H04L25/0228 , H04L25/024
摘要： An embodiment of the time-variant channel estimation in an OFDM transmission system envisages the operations of: a) determining the received signal vector Yj,k for one or more of R receiving antennas, j=1, . . . , R, and at the current time instant k together with the frequency-domain channel-estimate vector Ĥj,k-1 at a preceding time instant k−1 and for each antenna j of one or more of R receiving antennas; b) producing a first estimate Âk of the transmitted digital symbols at the current time instant k on the basis of the aforesaid frequency-domain channel-estimate vectors Ĥj,k-1 at the preceding time instant k−1; c) computing an updated version of the frequency-domain channel-estimate vectors Ĥj,k at the current time instant k and for each antenna j of one or more of R receiving antennas on the basis of the received signal vectors Yj,k at the current time instant k and for each antenna j of one or more of R receiving antennas, using the aforesaid estimate Âk of the transmitted digital symbols at the current time instant k as set of known transmitted digital symbols; d) using the aforesaid updated version of the frequency-domain channel-estimate vectors Ĥj,k at the current time instant k and for each antenna j of one or more of R receiving antennas, for equalizing the paths of the transmission channel and decoding the received signal vectors Yj,k at the current time instant k and for each antenna j of one or more of R receiving antennas; and e) storing the updated versions of the channel-estimate vectors for using them in steps a) and b) at the next time instant k+1.
摘要翻译： OFDM传输系统中的时变信道估计的实施例设想以下操作：a）确定R个接收天线中的一个或多个的接收信号矢量Y j，k，j = 1。。。 R，并且在当前时刻k与前一时刻k-1处的频域信道估计向量Ĥj，k-1和一个或多个R个接收天线的每个天线j一起; b）根据前一时刻k-1的上述频域信道估计向量Ĥj，k-1，在当前时刻k产生所发送的数字符号的第一估计值k; c）基于当前时刻k处的接收信号矢量Yj，k计算当前时刻k的频域信道估计向量Ĥj，k和R个接收天线中的一个或多个的每个天线j的更新版本，使用在当前时刻k的所发送的数字符号的上述估计k作为已知发送的数字符号的集合，使用当前时刻k和一个或多个R个接收天线的每个天线j; d）使用上述更新版本的当前时刻k的频域信道估计向量Ĥj，k和R个接收天线中的一个或多个的每个天线j，以均衡发送信道的路径并对在当前时刻k处的接收信号矢量Yj，k和R个接收天线中的一个或多个的每个天线j; 以及e）在下一时刻k + 1的步骤a）和b）中存储用于使用它们的信道估计向量的更新版本。

9. 发明授权

US09338034B2 Ternary sequences with power of two exponent dimensionalities suitable for channel estimation 有权
标题翻译：具有适合于信道估计的两个指数维度的幂的三元序列
公开(公告)号：US09338034B2
公开(公告)日：2016-05-10
申请号：US14049256
申请日：2013-10-09
申请人： QUALCOMM Incorporated
发明人： Siavash Ekbatani , Alok Kumar Gupta
IPC分类号： H04L25/02 , H04L25/49 , G01S5/06 , G01S5/00 , G01S5/02 , G01S11/08 , G06Q10/00 , H04W64/00 , G08B21/02
CPC分类号： H04L25/024 , G01S5/00 , G01S5/0205 , G01S5/0215 , G01S5/0221 , G01S5/0226 , G01S5/06 , G01S11/08 , G06Q10/00 , G08B21/0272 , H04L25/0226 , H04L25/4923 , H04W64/00
摘要： Methods, systems, and devices for channel estimation in a location tracking system are described. The methods, system, and devices may include tools and techniques for determining and/or designing perfect or semi-perfect sequences (including preamble sequences) for implementation in a location tracking system. Sequences having 2's exponent dimensionality, such as ternary sequences, may be determined and employed, which may help reduce implementation complexity and/or operating power consumption. Sequences may be determined using mean square error and/or maximum autocorrelation peak performance metrics.
摘要翻译：描述了位置跟踪系统中用于信道估计的方法，系统和设备。方法，系统和装置可以包括用于确定和/或设计用于在位置跟踪系统中实现的完美或半完美序列（包括前导码序列）的工具和技术。可以确定并采用具有2个指数维数的序列，例如三进制序列，这有助于降低实现复杂度和/或操作功耗。序列可以使用均方误差和/或最大自相关峰性能度量来确定。

10. 发明授权

US09288634B2 Determining the position of a mobile device in an indoor environment 有权
公开(公告)号：US09288634B2
公开(公告)日：2016-03-15
申请号：US14717644
申请日：2015-05-20
申请人： Empire Technology Development LLC
发明人： Arvind Vijay Keerthi
IPC分类号： H04W4/04 , H04W64/00 , G01S5/02 , H04L25/02 , H04W4/02 , H04L27/26
CPC分类号： H04W4/04 , G01S5/0215 , H04L25/0212 , H04L25/0228 , H04L25/024 , H04L27/2613 , H04W4/02 , H04W64/00 , H04W88/02 , H04W88/08
摘要： Technologies and implementations for determining the location of a device in an indoor environment are generally disclosed.

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