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81. 发明授权

US5805638A Systems and methods of digital wireless communication using equalization 失效
标题翻译：使用均衡的数字无线通信的系统和方法
公开(公告)号：US5805638A
公开(公告)日：1998-09-08
申请号：US566771
申请日：1995-12-04
申请人： William J. Liew
发明人： William J. Liew
IPC分类号： H03H21/00 , H04L25/02 , H04L25/03 , H03H7/30 , H04L27/06
CPC分类号： H04L25/0244 , H03H21/0012 , H04L25/025 , H04L2025/03547 , H04L25/03178
摘要： A wireless digital communication system, such as a cellular mobile communication system, overcomes channel dispersion and multipath fade with an equalizer using matrix division channel estimation followed by maximum likelihood sequence estimation for each time slot. The matrix division channel estimation involves storing transforms of the training symbols and producing a linear combination of received training symbols and the stored transforms.
摘要翻译：诸如蜂窝移动通信系统之类的无线数字通信系统使用矩阵分割信道估计来克服信道色散和均衡器的多路径衰落，随后是每个时隙的最大似然序列估计。矩阵分割信道估计涉及存储训练符号的变换并产生接收到的训练符号和所存储的变换的线性组合。

82. 发明授权

US5596607A Method and an arrangement of estimating transmitted symbols at a receiver in digital signal transmission 失效
标题翻译：在数字信号传输中在接收机处估计传输符号的方法和装置
公开(公告)号：US5596607A
公开(公告)日：1997-01-21
申请号：US079886
申请日：1993-06-23
申请人： Lars G. Larsson , Perols B. O. Gudmundson , Karim Jamal
发明人： Lars G. Larsson , Perols B. O. Gudmundson , Karim Jamal
IPC分类号： H04B1/10 , H04B7/005 , H04L25/02 , H04L25/03 , H04L27/06 , H03D1/00
CPC分类号： H04L25/03178 , H04B7/005 , H04L25/025 , H04L25/03292 , H04L25/03324
摘要： In a digital time-shared transmission system, a receiver receives a signal whose symbol rate is lower than the channel bandwidth of the system. A correlating and sampling circuit receives a baseband signal, samples the signal a number of times with each symbol time, performs channel correlation, generates a channel estimate and samples down the once sampled signal to an observed signal with two values for each symbol time. A channel equalizer executes a fractional viterbi algorithm which utilizes two delta-metric values for each state transition and generates estimated symbols. A channel estimating filter receives a symbol sequence of alternating zero-value symbols and the estimated symbols and generates an estimated signal. The channel estimating filter is adapted with the aid of an error signal and the filter delivers a channel estimate to the channel equalizer. Weighting factors are generated with the aid of the error signal and the two aforementioned delta-metric values are co-weighted to a common delta-metric value with the aid of weighting factors, this common delta-metric value being used to generate the estimated symbols. The use of the weighting factors improves the metric calculation and enables the channel estimating filter and the channel equalizer to be relatively simple. The insertion of the zero-value symbols simplifies the generation of the weighting factors and the adaptation of the channel estimating filter.
摘要翻译：在数字时分传输系统中，接收机接收符号率低于系统信道带宽的信号。相关和采样电路接收基带信号，每个符号时间多次采样信号，执行信道相关，产生信道估计，并将一次采样信号采样到具有每个符号时间的两个值的观测信号。信道均衡器执行分数维特比算法，其利用每个状态转换的两个Δ度量值并产生估计符号。信道估计滤波器接收交替的零值符号和估计符号的符号序列，并产生估计信号。信道估计滤波器借助于误差信号进行调整，并且滤波器向信道均衡器传送信道估计。借助于误差信号产生加权因子，并且借助于加权因子将两个前述的delta度量值共同加权到公共的delta度量值，该公共的delta度量值用于生成估计符号。使用加权因子改善了度量计算，使信道估计滤波器和信道均衡器相对简单。零值符号的插入简化了加权因子的生成和信道估计滤波器的适应。

83. 发明授权

US11916596B2 Distributed radio access networks (RANs) supporting coordinated amplifier gain optimization 有权
公开(公告)号：US11916596B2
公开(公告)日：2024-02-27
申请号：US17395099
申请日：2021-08-05
申请人： Corning Optical Communications LLC
发明人： Kalle Ahmavaara , Shirish Nagaraj , Deepak Pengoria
IPC分类号： H04B10/2575 , H04B1/40 , H04B17/00 , H04L25/02 , H03G3/30 , H04L27/36 , H04W24/02 , H04W52/24 , H04W72/12
CPC分类号： H04B10/25752 , H04B1/40 , H04B17/0085 , H04L25/025 , H03G3/30 , H04L27/36 , H04W24/02 , H04W52/24 , H04W72/12
摘要： A distributed radio access network (RAN) is provided. A selected wireless transceiver node(s) in a selected coverage cell receives a radio frequency (RF) test signal(s). The selected wireless transceiver node(s) determines an effective gain value based on a predefined characteristic of the RF test signal(s). The selected wireless transceiver node(s) communicates the effective gain value and other related parameters to a server apparatus in the distributed RAN. The server apparatus determines a common gain value for the selected wireless transceiver node(s) in the selected coverage cell based on the parameters. Accordingly, the selected wireless transceiver node(s) operates based on the common gain value. By determining a respective common gain value for each of the coverage cells in the distributed RAN, it may be possible for all the wireless transceiver nodes in the distributed RAN to communicate an uplink digital communications signal(s) without causing distortion in the uplink digital communications signal(s).

84. 发明公开

US20240048413A1 CHANNEL RESTORATION METHOD AND RECEIVING DEVICE 审中-公开
公开(公告)号：US20240048413A1
公开(公告)日：2024-02-08
申请号：US18382104
申请日：2023-10-20
申请人： GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
发明人： Han Xiao , Wenqiang Tian , Wendong Liu
IPC分类号： H04L25/02 , H04L25/03
CPC分类号： H04L25/0254 , H04L25/0224 , H04L25/025 , H04L25/03
摘要： The embodiments of the present disclosure provide a channel restoration method and a receiving device, capable of performing channel restoration based on a neural network, thereby improving channel restoration performance and in turn improving data restoration and channel feedback performance. The channel restoration method includes: receiving, by a receiving device, a pilot signal and a data signal transmitted by a transmitting device; extracting, by the receiving device, channel correlation features from target information using a first neural network to obtain a target feature map, the target information including the data signal and the pilot signal, or the target information including the data signal and a pilot position channel determined based on the pilot signal; and performing, by the receiving device, channel restoration processing on the target feature map and the pilot position channel using a second neural network to obtain restored channel information.

85. 发明授权

US11854166B2 Apparatus and method using baseline estimation and half-quadratic minimization for the deblurring of signal data 有权
公开(公告)号：US11854166B2
公开(公告)日：2023-12-26
申请号：US17042195
申请日：2019-03-29
申请人： LEICA MICROSYSTEMS CMS GMBH
发明人： Kai Walter , Florian Ziesche
IPC分类号： G06T5/00 , G06T5/10 , G06T5/20 , H04L25/02 , G06V10/30 , G06F17/13 , G06F17/15 , G06T7/00 , G02B7/38 , G02B21/12 , G02B21/24 , H04N25/615
CPC分类号： G06T5/003 , G02B7/38 , G02B21/12 , G02B21/244 , G06F17/13 , G06F17/15 , G06T5/002 , G06T5/10 , G06T5/20 , G06T7/0012 , G06V10/30 , H04L25/025 , H04N25/615 , G06T2207/10056 , G06T2207/10068 , G06T2207/20056 , G06T2207/20081 , G06T2207/20084 , G06T2207/30024
摘要： A method for estimating baseline in a signal, the signal being represented by input signal data (I(xi)), includes estimating a baseline contribution (I2(xi)) in the signal to obtain baseline estimation data (f(xi)), wherein the baseline estimation data (f(xi)) are computed as a fit to at least a subset of the input signal data (I(xi)) by minimizing a least-square minimization criterion (M(f(xi))). Deblurred output signal data (O(xi)) are obtained based on the baseline estimation data (f(xi)) and the input signal data (I(xi)). The least-square minimization criterion (M(f(xi))) comprises a penalty term (P(f(xi))).

86. 发明授权

US11765001B1 Wireless mesh network 有权
公开(公告)号：US11765001B1
公开(公告)日：2023-09-19
申请号：US17090738
申请日：2020-11-05
申请人： Verana Networks, Inc.
发明人： Kenneth D. Jones , Vedat Eyuboglu
IPC分类号： H04L25/02 , H04W84/18
CPC分类号： H04L25/0204 , H04L25/0212 , H04L25/0242 , H04L25/021 , H04L25/025 , H04W84/18
摘要： Among other things, aspects, features, and implementations of wireless mesh networks and wireless mesh network devices are described.

87. 发明公开

US20230198815A1 METHODS AND DEVICES FOR JOINT PROCESSING IN MASSIVE MIMO SYSTEMS 审中-公开
公开(公告)号：US20230198815A1
公开(公告)日：2023-06-22
申请号：US17553918
申请日：2021-12-17
申请人： Intel Corporation
发明人： Lu LU , Sundar KRISHNAMURTHY , Kuilin Clark CHEN , Thushara HEWAVITHANA
IPC分类号： H04L25/02 , H04B17/391
CPC分类号： H04L25/0256 , H04B17/391 , H04L25/0258 , H04L25/025 , H04L25/0252
摘要： A distributed unit (DU) may include a transceiver configured to communicate with a plurality of radio units (RUs) that are configured to serve a plurality of user equipments (UEs). The DU may include a processor configured to determine RU precoding parameters for UEs served by a first RU set from the plurality of RUs based on estimated channel parameters for communication channels between the first RU set and at least one of interfering UEs served by other RUs from the plurality of RUs; to encode information indicating the determined precoding parameters for downlink transmissions to the first RU set and determine DU precoding parameters for downlink transmissions to the UEs served by the first RU set based on the determined RU precoding parameters; and/or precode communication signals based on the determined DU precoding parameters.

88. 发明授权

US11669940B2 Apparatus and method for baseline estimation in input signal data 有权
公开(公告)号：US11669940B2
公开(公告)日：2023-06-06
申请号：US17042194
申请日：2019-03-29
申请人： LEICA MICROSYSTEMS CMS GMBH
发明人： Kai Walter , Florian Ziesche
IPC分类号： G06K9/00 , G06T5/00 , G06T5/10 , G06T5/20 , H04L25/02 , G06V10/30 , G06F17/13 , G06F17/15 , G06T7/00 , G02B7/38 , G02B21/12 , G02B21/24 , H04N25/615
CPC分类号： G06T5/003 , G02B7/38 , G02B21/12 , G02B21/244 , G06F17/13 , G06F17/15 , G06T5/002 , G06T5/10 , G06T5/20 , G06T7/0012 , G06V10/30 , H04L25/025 , H04N25/615 , G06T2207/10056 , G06T2207/10068 , G06T2207/20056 , G06T2207/20081 , G06T2207/20084 , G06T2207/30024
摘要： An apparatus for baseline estimation in input signal data is configured to retrieve input signal data (I(xi)) and to subtract baseline estimation data (ƒ(xi)) from the input signal data (I(xi)) to compute output signal data. The apparatus is further configured to compute the baseline estimation data (ƒ(xi)) from a convolution using a discrete Green's function (G(xi)).

89. 发明授权

US11652672B1 Adaptive guard interval using channel impulse response data 有权
公开(公告)号：US11652672B1
公开(公告)日：2023-05-16
申请号：US17206995
申请日：2021-03-19
申请人： Amazon Technologies, Inc.
发明人： Cyril Arokiaraj Arool Emmanuel , Satyabh Mishra
IPC分类号： H04L25/02 , H04L27/26
CPC分类号： H04L25/025 , H04L25/022 , H04L25/0212 , H04L27/2607
摘要： A method and system to determine an adjusted guard interval duration associated with a wireless signal transmitted via a wireless communication link between a first network device and a second network device in a wireless network. The second network device receives a first wireless signal including a first duration of a guard interval from the first network device at a first time. The second network device determines, in view of the set of pilot symbols, a channel impulse response. A channel parameter value is determined based on the channel impulse response. An adjusted guard interval duration corresponding to the channel parameter value is established and used to estimate a second physical rate of the link. The second network device provides a communication identifying the adjusted guard interval duration to the first network device in response to determining the second physical rate is greater than the first physical rate.

90. 发明授权

US10841013B2 High-speed receiver architecture 有权
公开(公告)号：US10841013B2
公开(公告)日：2020-11-17
申请号：US16674957
申请日：2019-11-05
申请人： INPHI CORPORATION
发明人： Oscar Ernesto Agazzi , Diego Ernesto Crivelli , Hugo Santiago Carrer , Mario Rafael Hueda , German Cesar Augusto Luna , Carl Grace
IPC分类号： H04B10/50 , H04L5/16 , H04B1/38 , H04B10/69 , H04L25/02 , H04L25/03 , H04B10/40 , H03M13/41 , H04B3/23 , H04B7/005 , H04B10/2507 , H04B10/294 , H04B1/04 , H04B7/0456
CPC分类号： H04B10/5059 , H03M13/41 , H04B1/38 , H04B3/235 , H04B7/005 , H04B10/25073 , H04B10/2941 , H04B10/40 , H04B10/6971 , H04L5/16 , H04L25/0202 , H04L25/025 , H04L25/03038 , H04L25/03057 , H04B7/0456 , H04B2001/0441 , H04B2201/709772 , H04L2025/03477 , H04L2025/03617
摘要： A receiver (e.g., for a 10G fiber communications link) includes an interleaved ADC coupled to a multi-channel equalizer that can provide different equalization for different ADC channels within the interleaved ADC. That is, the multi-channel equalizer can compensate for channel-dependent impairments. In one approach, the multi-channel equalizer is a feedforward equalizer (FFE) coupled to a Viterbi decorder, for example, a sliding block Viterbi decoder (SBVD); and the FFE and/or the channel estimator for the Viterbi decoder are adapted using the LMS algorithm.

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