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1. 发明授权

US11968064B2 Multiple-input and multiple-output (MIMO) detection in wireless communications 有权
公开(公告)号：US11968064B2
公开(公告)日：2024-04-23
申请号：US17953088
申请日：2022-09-26
申请人： ZEKU TECHNOLOGY (SHANGHAI) CORP., LTD.
发明人： Jian Gu , Chengzhi Li , Hang Zhou , Bin Liu
IPC分类号： H04L25/03 , H04B7/022 , H04B7/0417 , H04B7/06 , H04L1/00
CPC分类号： H04L25/03242 , H04B7/022 , H04B7/0417 , H04B7/0626 , H04L1/0054 , H04L2025/03426
摘要： Introduced here is at least one technique to better estimate interference at a receiver. The technique includes receiving a plurality of reference signals, which each have information indicative of noise. Thus, the technique further includes, for each reference signal, determining a noise estimation and determining a distance metric and log-likelihood ratio (LLR) of the noise estimation. Once the distance metric and LLR of each reference signal is determined, the receiver can determine a final LLR based on the distance metric and LLR of each reference signal. In this manner, a final LLR is determined. This technique can be applied by any device operating on MIMO technology.

2. 发明授权

US11888655B2 Devices and methods for machine learning assisted sphere decoding 有权
公开(公告)号：US11888655B2
公开(公告)日：2024-01-30
申请号：US17620715
申请日：2020-06-23
申请人： INSTITUT MINES-TELECOM
发明人： Ghaya Rekaya , Aymen Askri
IPC分类号： H04L25/03 , G06N20/10 , G06N3/048
CPC分类号： H04L25/03242 , G06N3/048 , G06N20/10 , H04L2025/03458 , H04L2025/03464
摘要： A decoder for decoding a signal received through a transmission channel represented by a channel matrix using a search sphere radius. The decoder comprises a radius determination device for determining a search sphere radius from a preliminary radius. The radius determination device is configured to: i. apply a machine learning algorithm to input data derived from the received signal, the channel matrix and a current radius, the current radius being initially set to the preliminary radius, which provides a current predicted number of lattice points associated with the current radius; ii. compare the current predicted number of lattice points to a given threshold; iii. update the current radius if the current predicted number of lattice points is strictly higher than the given threshold, the current radius being updated by applying a linear function to the current radius; Steps i to iii are iterated until a termination condition is satisfied, the termination condition being related to the current predicted number, the radius determination device being configured to set the search sphere radius to the current radius in response to the termination condition being satisfied.

3. 发明申请

US20180034675A1 TREE SEARCH TONE RESERVATION FOR PAPR REDUCTION IN OFDM SYSTEMS 审中-公开
公开(公告)号：US20180034675A1
公开(公告)日：2018-02-01
申请号：US15550947
申请日：2015-10-16
申请人： Kabushiki Kaisha Toshiba
发明人： Filippo TOSATO , Magnus Stig Torsten SANDELL
IPC分类号： H04L27/26 , H04L25/03
CPC分类号： H04L27/2618 , H04L1/0053 , H04L25/03242 , H04L27/2626
摘要： An OFDM transmitter comprising an input for acquiring or receiving a signal to be transmitted, an output for transmitting a PAPR reduced version of the signal, a processor and memory storing code for execution by the processor. The processor, when executing the code, is configure to determine a plurality of possible values of tone reservation, hereinafter referred to as TR, tones for use in TR based PAPR reduction and to perform a tree search over some or all of the possible values under a first constraint that the average power per TR tone does not exceed the average power per tone used for data transmission and a second constraint that selected values for the TR tones reduce PAPR.

4. 发明授权

US09667453B2 Equalization in the receiver of a multiple input multiple output system 有权
公开(公告)号：US09667453B2
公开(公告)日：2017-05-30
申请号：US14898194
申请日：2014-06-17
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Özgün Paker
IPC分类号： H03H7/30 , H03H7/40 , H03K7/00 , H04L25/03 , H04B7/0413
CPC分类号： H04L25/03057 , H04B7/0413 , H04L25/03171 , H04L25/03242
摘要： Embodiments of the invention concern a method of equalizing (S9), in a turbo equalizing system (S10), by sphere decoding (S11) a signal transmitted over a channel by a multiple input multiple output system, comprising: receiving (S3) said transmitted signal, building (S4) at least one search tree, providing (S6) likelihoods of bits, for said transmitted signal, from said built search tree(s) and from said received transmitted signal, wherein equalizing method (S9) also comprises receiving feedback signal from a channel decoder (S8) of said turbo equalizing system (S10), and wherein said feedback signal is used to build (S4) said search tree(s).

5. 发明授权

US09509533B2 Method performed by a sphere decoder based turbo equalizer 有权
标题翻译：基于球面解码器的turbo均衡器执行的方法
公开(公告)号：US09509533B2
公开(公告)日：2016-11-29
申请号：US14893230
申请日：2014-05-23
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Özgün Paker
IPC分类号： H04L25/03 , H04L27/34 , H03M13/25
CPC分类号： H04L25/03242 , H03M13/258 , H04L25/03286 , H04L25/03318 , H04L27/3416 , H04L2025/03426 , H04L2025/03611
摘要： A sphere decoder based turbo equalizer is described. A method comprises assorting in a first vector Quadrature Amplitude Modulation, QAM, symbols on a particular tree level based on first distance properties, assorting in a second vector QAM symbols on the particular tree level based on second distance properties, selecting the QAM symbol with the minimum second distance property in the second vector, wherein said selecting comprises labeling the selected QAM symbol as protected, identifying the selected QAM symbol in the first vector assorted by distance properties, pruning the first vector by eliminating all QAM symbols having a larger first distance property compared to the selected QAM symbol, wherein said pruning is restricted to QAM symbols not being labeled as protected, and repeating the steps d-e selecting the QAM symbol with the next minimum second distance property.
摘要翻译：描述了基于球面解码器的turbo均衡器。一种方法包括基于第一距离属性在第一矢量正交幅度调制QAM中分配特定树级上的符号，基于第二距离属性对特定树级别上的第二矢量QAM符号进行分类，选择QAM符号其中所述选择包括将所选择的QAM符号标记为受保护的，识别由距离属性分类的第一向量中的所选择的QAM符号，通过消除具有较大第一距离属性的所有QAM符号来修剪第一向量与所选择的QAM符号相比，其中所述修剪被限制为不被标记为受保护的QAM符号，并且重复以下述最小第二距离属性选择QAM符号的步骤。

6. 发明授权

US09356733B2 Method and apparatus for soft output fixed complexity sphere decoding detection 有权
公开(公告)号：US09356733B2
公开(公告)日：2016-05-31
申请号：US14648089
申请日：2013-09-23
申请人： ZTE Microelectronics Technology Co., Ltd
发明人： Gang Wu , Wenshui Shen
IPC分类号： H04L27/06 , H04L1/00 , H04L25/03 , H04B7/04
CPC分类号： H04L1/0054 , H04B7/0456 , H04L25/03242 , H04L25/03318
摘要： Provided are an SFSD detection method and apparatus, and the method includes: QR decomposition is performed on a channel response matrix to acquire a Q matrix and an R matrix; the conjugate transpose of the Q matrix is multiplied by a received signal to acquire an equalized signal of the received signal; ML path detection is performed on the equalized signal, reserved nodes in respective layers are decreased layer by layer to acquire an ML path, and branches as many as iterations are reserved; ML complementary set path detection is performed on the branches, and all nodes of an acquired complementary set layer are reserved and reserved nodes in other layers are decreased layer by layer to acquire an ML complementary set path; and LLR information of each bit of each symbol of each layer is acquired according to the ML path and the ML complementary set path. For more-than-two-layer MIMO, the disclosure can acquire a detection performance approaching the ML performance and meet requirements on acceptable hardware implementation complexity.

7. 发明授权

US09252990B1 MIMO sphere decoder with linear startup in a wireless local area network 有权
标题翻译：在无线局域网中具有线性启动的MIMO球体解码器
公开(公告)号：US09252990B1
公开(公告)日：2016-02-02
申请号：US13652376
申请日：2012-10-15
申请人： Quantenna Communications, Inc.
发明人： Pengcheng Zhan , Hossein Dehghan , Hongping Liu
IPC分类号： H04L25/03 , H04L1/06
CPC分类号： H04L25/03242 , H04L1/005 , H04L1/0656 , H04L25/03229
摘要： A wireless device with multiple antennae and configured to support orthogonal frequency-division multiplexed (OFDM), multiple-input multiple-output (MIMO) communications of a wireless local area network (LAN) over a wireless communication medium on a communication channel. The wireless device comprises: a MIMO demapper configured to receive a packet on the communication channel and to perform both linear together with non-linear decoding processes based on an initial communication channel estimate ‘H’, and with initial linear decoding of at least a first received symbol in a payload portion of the received packet followed by decoding of remaining symbols in the packet using non-linear sphere decoding, thereby reducing a level of complexity associated with non-linear decoding by extending a time interval available for an initial channel estimate decomposition portion of non-linear sphere decoding to span at least a portion of a n interval associated with linear decoding of at least the first received payload symbol.
摘要翻译：一种具有多个天线并被配置为支持无线局域网（LAN）在通信信道上的无线通信介质上的正交频分复用（OFDM），多输入多输出（MIMO）通信的无线设备。所述无线设备包括：MIMO去映射器，被配置为在所述通信信道上接收分组，并且基于初始通信信道估计'H'与非线性解码处理两者同时执行线性，并且利用初始线性解码至少第一在接收到的分组的有效载荷部分中接收到符号，随后使用非线性球体解码解码分组中的剩余符号，从而通过扩展可用于初始信道估计分解的时间间隔来降低与非线性解码相关联的复杂度水平部分非线性球体解码以跨越与至少第一接收到的有效载荷符号的线性解码相关联的间隔的至少一部分。

8. 发明申请

US20150349923A1 Sphere Decoding Detection Method And Device 审中-公开
标题翻译：球体解码检测方法和装置
公开(公告)号：US20150349923A1
公开(公告)日：2015-12-03
申请号：US14654601
申请日：2013-07-23
申请人： ZTE CORPORATION
发明人： Pengpeng QIAO
IPC分类号： H04L1/00 , H04B7/04 , H04B7/08
CPC分类号： H04L1/0052 , H04B7/0413 , H04B7/0854 , H04L1/00 , H04L1/0045 , H04L1/0047 , H04L25/0204 , H04L25/0246 , H04L25/03242 , H04L2025/03426
摘要： Disclosed are a sphere decoding detection method and apparatus, including: preprocessing a received signal to obtain a signal approximate estimation value Xpre of the received signal, deducing an initial square radius D2 of sphere decoding detection according to Xpre, and determining the size I of a constellation space according to the current signal to noise ratio of the received signal; according to depth first and sphere constraint rules, searching for a search path depending on the size I of the constellation space and an initial square radius D2; after a search path is searched out, and when the sum of local Euclidean distances of the searched-out search path is less than the current square radius, updating the square radius, and re-searching for a search path until a search path cannot be searched out, and determining a candidate signal point corresponding to the latest saved search path as the optimum signal estimation point.
摘要翻译：公开了一种球体解码检测方法和装置，包括：对接收到的信号进行预处理以获得接收信号的信号近似估计值Xpre，根据Xpre推定球体解码检测的初始平方半径D2，并确定a的尺寸I 星座空间根据当前信噪比的接收信号; 根据深度第一和球面约束规则，根据星座空间的大小I和初始平方半径D2搜索搜索路径; 在搜索路径被搜索出之后，并且当搜索出的搜索路径的局部欧几里德距离之和小于当前平方半径时，更新平方半径，并重新搜索搜索路径，直到搜索路径不能搜索出，并且将与最新保存的搜索路径相对应的候选信号点确定为最佳信号估计点。

9. 发明授权

US09166740B1 Low complexity distance metrics for maximum likelihood receivers 有权
标题翻译：用于最大似然接收机的低复杂度距离度量
公开(公告)号：US09166740B1
公开(公告)日：2015-10-20
申请号：US14165893
申请日：2014-01-28
申请人： Marvell International Ltd.
发明人： Adina Matache , Leilei Song , Bhaskar V. Nallapureddy , Hui-Ling Lou
IPC分类号： H03M13/45 , H04L1/00 , H04L25/03 , H04L5/12 , H04L27/06
CPC分类号： H04L1/0054 , H03M13/45 , H04L25/03171 , H04L25/03242 , H04L25/03318
摘要： Systems and methods are provided for determining a data value for a bit of interest in a received data signal. A closest 0-bit symbol candidate is selected from a plurality of 0-bit symbol candidates using a symbol selection distance approximation. A closest 1-bit symbol candidate is selected from a plurality of 1-bit symbol candidates using the symbol selection distance approximation. A 0-bit distance between the received data signal and the selected 0-bit symbol candidate is determined, and a 1-bit distance between the received data signal and the selected 1-bit symbol candidate is determined. A log likelihood ratio is calculated for the bit of interest using the determined 0-bit distance and the determined 1-bit distance.
摘要翻译：系统和方法被提供用于确定接收到的数据信号中感兴趣的位的数据值。使用符号选择距离近似从多个0位符号候选中选择最接近的0位符号候选。使用符号选择距离近似，从多个1位符号候选中选择最接近的1位符号候选。确定接收到的数据信号和所选择的0位符号候选之间的0比特距离，并确定接收到的数据信号与所选择的1比特符号候选之间的1比特距离。使用所确定的0比特距离和所确定的1比特距离来计算感兴趣比特的对数似然比。

10. 发明申请

US20150155924A1 Processing Method and Device for Performing Space-Time Decoding on MIMO Signal 有权
标题翻译：用于在MIMO信号上执行空时解码的处理方法和装置
公开(公告)号：US20150155924A1
公开(公告)日：2015-06-04
申请号：US14406021
申请日：2013-08-20
申请人： ZTE CORPORATION
发明人： Hongfeng Qin , Gaocai Xiong , Yue Xiao , Hongzhi Zhao
IPC分类号： H04B7/04
CPC分类号： H04B7/0478 , H04B7/0473 , H04L1/0631 , H04L25/03242 , H04L25/03318 , H04L25/03891 , H04L2025/0342
摘要： Provided is a processing method and apparatus for performing space-time decoding on MIMO signals. The method includes: performing QR decomposition on a channel matrix H with a size of Nr×Nt in a MIMO system and performing an initialization operation, wherein Nt is the number of transmitting antennas and Nr is the number of receiving antennas; enumerating candidate constellation points of transmitting signals at each level of transmitting antennas according to an input parameter M=[M1, M2, . . . , MNt], a receiving signal y and a result of the QR decomposition of the channel matrix H, wherein M is the number of the numerated candidate constellation points at each level, y=Hs+n calculating increments of a Euclid distance due to addition of selection of a candidate constellation point at present level according to obtained candidate constellation points; and deciding and outputting space-time decoding according to the sum of calculated increments of Euclid distances of candidate constellation points at all levels.
摘要翻译：提供了一种用于对MIMO信号执行空时解码的处理方法和装置。该方法包括：在MIMO系统中对Nr×Nt大小的信道矩阵H执行QR分解，并执行初始化操作，其中Nt是发射天线的数量，Nr是接收天线的数量; 根据输入参数M = [M1，M2，...]来枚举在发射天线的每个等级的发射信号的候选星座点。。。，MNt]，接收信号y和信道矩阵H的QR分解的结果，其中M是每个级别上的所计算的候选星座点的数量，y = Hs + n计算由于加法而产生的欧几里德距离的增量根据获得的候选星座点选择当前级别的候选星座点; 并根据所有级别的候选星座点的欧几里德距离的计算增量的总和来确定和输出空时解码。

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