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1. 发明申请

US20180343647A1 METHOD AND APPARATUS FOR TRANSMITTING PILOT ON MULTIPLE ANTENNAS 审中-公开
公开(公告)号：US20180343647A1
公开(公告)日：2018-11-29
申请号：US15972960
申请日：2018-05-07
申请人： InterDigital Patent Holdings, Inc.
发明人： Benoit Pelletier , Lujing Cai , Hong O. ZHANG , Fengjun Xi , Joseph S. Levy
IPC分类号： H04W72/04 , H04L27/26 , H04B7/06 , H04B7/0404 , H04W52/42 , H04L5/00 , H04L25/03 , H04W52/32 , H04J13/16 , H04W52/16 , H04W52/28 , H04W52/36 , H04W52/38 , H04W52/40
CPC分类号： H04W72/0406 , H04B7/0404 , H04B7/0634 , H04B7/0678 , H04J13/16 , H04L5/0014 , H04L5/0023 , H04L5/0051 , H04L25/03942 , H04L25/03961 , H04L27/2613 , H04W52/16 , H04W52/286 , H04W52/325 , H04W52/367 , H04W52/386 , H04W52/40 , H04W52/42
摘要： A method and apparatus for transmitting using beam are disclosed. A wireless transmit/receive unit (WTRU) may transmit a first physical random access channel (PRACH) preamble to a base station using a first beam at a first power level. The WTRU may receive an indication that the first PRACH preamble was received by the base station. If the indication was received, the WTRU may transmit data. If the indication was not received, the WTRU may select the first beam or a second beam to use for a second PRACH preamble. Further, the first and second beams may be different beams. If the first beam is selected, the WTRU may increase a transmission power level of the second PRACH preamble by a first power ramp step. If the second beam is selected, the WTRU may not increase the transmission power level of the second PRACH preamble by the first power ramp step.

2. 发明授权

US09362990B1 Method and apparatus for precomputation based MIMO decoder 有权
标题翻译：用于基于预计算的MIMO解码器的方法和装置
公开(公告)号：US09362990B1
公开(公告)日：2016-06-07
申请号：US14740645
申请日：2015-06-16
申请人： MBIT WIRELESS, INC.
发明人： Raghavendra H Bhat , Bhaskar Patel
IPC分类号： H04B7/02 , H04B7/04 , H04W88/08
CPC分类号： H04B7/0413 , H04B7/0669 , H04B7/0697 , H04L1/0045 , H04L25/03961 , Y02D70/1262 , Y02D70/142 , Y02D70/146 , Y02D70/444
摘要： Spatial Multiplexing (SM) with Multiple Input Multiple Output (MIMO) is used in many communication systems for providing high data rates. While SM-MIMO is a powerful technique for increasing the data rate and bandwidth efficiency, the decoders for SM-MIMO are highly complex. The complexity grows exponentially for optimum decoders as the number of multiplexed layers in SM-MIMO increases. Many reduced complexity suboptimal methods are used in practice that have close to optimum performance but they remain highly complex causing high power consumption which is not desirable for battery operated client terminals. Due to the parallel architecture of many of the SM-MIMO decoders, they involve computations that may eventually turn out to be redundant. A method and apparatus may include identifying and eliminating potentially redundant computations in SM-MIMO decoders based on the technique referred herein as precomputation. The removal of redundant computations enables reduced power consumption for SM-MIMO decoders.
摘要翻译：在多个通信系统中使用具有多输入多输出（MIMO）的空间复用（SM）来提供高数据速率。虽然SM-MIMO是提高数据速率和带宽效率的强大技术，但SM-MIMO的解码器非常复杂。随着SM-MIMO中多路复用层数的增加，最优解码器的复杂度呈指数增长。许多降低的复杂度在实践中使用的次优方法在接近最佳性能的情况下被使用，但它们仍然是非常复杂的，导致高功耗，这对于电池供电的客户终端是不希望的。由于许多SM-MIMO解码器的并行架构，它们涉及可能最终变成冗余的计算。一种方法和装置可以包括基于本文中称为预计算的技术来识别和消除SM-MIMO解码器中潜在的冗余计算。去除冗余计算可以降低SM-MIMO解码器的功耗。

3. 发明授权

US09246646B2 Method and apparatus for transmitting pilot on multiple antennas 有权
标题翻译：用于在多个天线上发射导频的方法和装置
公开(公告)号：US09246646B2
公开(公告)日：2016-01-26
申请号：US13250238
申请日：2011-09-30
申请人： Benoit Pelletier , Lujing Cai , Hong Zhang , Fengjun Xi , Joseph S. Levy
发明人： Benoit Pelletier , Lujing Cai , Hong Zhang , Fengjun Xi , Joseph S. Levy
IPC分类号： H04L5/00 , H04W52/42 , H04L25/03 , H04L27/26 , H04B7/04 , H04B7/06 , H04W52/16 , H04W52/28 , H04W52/36 , H04W52/38 , H04W52/40 , H04J13/16
CPC分类号： H04W72/0406 , H04B7/0404 , H04B7/0634 , H04B7/0678 , H04J13/16 , H04L5/0014 , H04L5/0023 , H04L5/0051 , H04L25/03942 , H04L25/03961 , H04L27/2613 , H04W52/16 , H04W52/286 , H04W52/325 , H04W52/367 , H04W52/386 , H04W52/40 , H04W52/42
摘要： Method and apparatus for transmitting pilot on multiple antennas are disclosed. A wireless transmit/receive unit (WTRU) may transmit a primary dedicated physical control channel (DPCCH) and at least one secondary DPCCH via multiple antennas using different channelization codes. The first eight pilot symbols of the secondary DPCCH may be same as pilot symbols of length eight of the primary DPCCH. The secondary DPCCH may include a same number of pilot bits as the primary DPCCH in a normal mode and in a compressed mode, respectively. The transmit power of the secondary DPCCH may be adjusted based on a ratio of a number of pilot symbols in the primary DPCCH and the secondary DPCCH. When a required transmit power exceeds a maximum allowed transmit power of the WTRU, power scaling may be applied equally to the primary DPCCH and the secondary DPCCH.
摘要翻译：公开了用于在多个天线上发射导频的方法和装置。无线发射/接收单元（WTRU）可以使用不同的信道化码通过多个天线发射主要专用物理控制信道（DPCCH）和至少一个辅助DPCCH。辅助DPCCH的前八个导频符号可以与主DPCCH的长度为8的导频符号相同。次级DPCCH可以分别包括与正常模式和压缩模式中的主DPCCH相同数量的导频位。可以基于主DPCCH中的导频符号数与辅DPCCH之间的比率来调整辅助DPCCH的发射功率。当所需的发射功率超过WTRU的最大允许发射功率时，功率缩放可以均等地应用于主DPCCH和辅助DPCCH。

4. 发明授权

US09031145B1 Low complexity technique for log-likelihood ratio computation 有权
标题翻译：对数似然比计算的低复杂度技术
公开(公告)号：US09031145B1
公开(公告)日：2015-05-12
申请号：US14291473
申请日：2014-05-30
申请人： Marvell International Ltd.
发明人： Arul Durai Murugan Palanivelu , Leilei Song , Rohit U. Nabar , Jungwon Lee , Sayandev Mukherjee , Hui-Ling Lou
IPC分类号： H04L23/02 , H04L5/12 , H04B7/04
CPC分类号： H04B7/0413 , H04L25/03242 , H04L25/03961 , H04L25/067 , H04L2025/03414 , H04L2025/0342
摘要： Systems and methods for detecting data in a multiple input/multiple output signal. The method includes receiving a first signal associated with a first data value and a second signal associated with a second data value. A distance value between the received second signal and each possible second data value is calculated. Coordinates for a hypothetical first signal in light of a first possible second data value are calculated, and the first coordinate value is quantized to a nearest constellation point. A distance value between the received second signal and each possible second data value is calculated using the calculated constellation points. A determination is made of a log-likelihood ratio based on the determined distance values.
摘要翻译：用于检测多输入/多输出信号中的数据的系统和方法。该方法包括接收与第一数据值相关联的第一信号和与第二数据值相关联的第二信号。计算接收到的第二信号与每个可能的第二数据值之间的距离值。计算出根据第一可能的第二数据值的假设第一信号的坐标，并且将第一坐标值量化到最接近的星座点。使用所计算的星座点来计算所接收的第二信号与每个可能的第二数据值之间的距离值。基于确定的距离值来确定对数似然比。

5. 发明申请

US20130208825A1 METHOD AND DEVICE FOR PRECODING IN WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：用于在无线通信系统中预测的方法和设备
公开(公告)号：US20130208825A1
公开(公告)日：2013-08-15
申请号：US13880540
申请日：2011-09-07
申请人： Ki Jun Kim , Sung Yoon Cho , Dong Ku Kim , Jin Young Jang , Byoung Hoon Kim , Hyuk Jin Chae
发明人： Ki Jun Kim , Sung Yoon Cho , Dong Ku Kim , Jin Young Jang , Byoung Hoon Kim , Hyuk Jin Chae
IPC分类号： H04B7/04
CPC分类号： H04B7/0456 , H04B7/0426 , H04B7/0465 , H04L5/0023 , H04L25/0244 , H04L25/0391 , H04L25/03961 , H04L2025/03414 , H04L2025/03624
摘要： Provided is a method and a device for precoding in a wireless communication system. The method for precoding comprises the following steps: generating a first precoding matrix, W1, for deciding the transmission power of one transmission antenna from a plurality of transmission antennas as the maximum power per antenna; generating a zero forcing (ZF) precoding matrix, Ti, which does not influence the transmission antenna having the power which is decided as the maximum power per antenna, based on the (i−1)th precoding matrix Wi−1 (i=2,3, . . . ); determining a constant which has the transmission power of one transmission antenna from the rest of the transmission antennas, which do not have the transmission power as the maximum power per antenna, based on the Ti; and generating the
摘要翻译：提供了一种用于无线通信系统中的预编码的方法和装置。用于预编码的方法包括以下步骤：生成用于从多个发送天线中确定一个发送天线的发送功率作为每个天线的最大功率的第一预编码矩阵W1; 基于第（i-1）预编码矩阵Wi-1（i = 2）生成不影响具有被确定为每天线的最大功率的功率的发送天线的零强制（ZF）预编码矩阵Ti ，3，...）; 基于Ti，确定具有不具有作为每个天线的最大功率的发送功率的其余发送天线的一个发送天线的发送功率的常数; 并产生

6. 发明申请

US20120147992A1 METHOD AND APPARATUS FOR CONSTRUCTING CODEBOOK, AND METHOD, APPARATUS AND SYSTEM FOR PRECODING 有权
标题翻译：用于构建代码的方法和装置，以及用于预编码的方法，装置和系统
公开(公告)号：US20120147992A1
公开(公告)日：2012-06-14
申请号：US13390796
申请日：2009-08-18
申请人： Hongwei Yang , Dong Li , Keying Wu
发明人： Hongwei Yang , Dong Li , Keying Wu
IPC分类号： H04B15/00 , H04B1/02
CPC分类号： H04B7/0473 , H04B7/0413 , H04L25/03898 , H04L25/03961
摘要： The present invention discloses a method and apparatus for constructing a codebook. The method comprises: receiving grouping information on a plurality of transmit antennas of a base station: obtaining a channel model for a channel between a mobile terminal and the base station; and determining an optimal precoding matrix corresponding to each antenna group according to the grouping information and the channel model, so as to construct a codebook used for precoding. The present invention further discloses a method and apparatus for selecting a precoding matrix, as well as a method, apparatus and system for precoding.
摘要翻译：本发明公开了一种构造码本的方法和装置。该方法包括：在基站的多个发射天线上接收分组信息：获取移动终端与基站之间的信道的信道模型; 以及根据分组信息和信道模型确定与每个天线组对应的最佳预编码矩阵，以便构造用于预编码的码本。本发明还公开了一种用于选择预编码矩阵的方法和装置，以及用于预编码的方法，装置和系统。

7. 发明授权

US10009073B2 System for acquiring channel knowledge and method thereof 有权
公开(公告)号：US10009073B2
公开(公告)日：2018-06-26
申请号：US15399754
申请日：2017-01-06
申请人： MediaTek Inc. , NATIONAL TAIWAN UNIVERSITY
发明人： Cheng-Rung Tsai , An-Yeu Wu , Ju-Ya Chen , Qiang Zhou
IPC分类号： H04B7/02 , H04B7/0408 , H04B7/06 , H04L25/03
CPC分类号： H04B7/0408 , H04B7/0617 , H04B7/0684 , H04B7/0695 , H04B7/088 , H04L25/0206 , H04L25/03898 , H04L25/03961
摘要： A system for acquiring channel knowledge and a method thereof are provided. At least one transmitter generates multiple directional beams in different directions, next modulates the directional beams in the different directions with at least one spreading sequence, so as to enlarge the beam range of each directional beam in the different directions and use the modulated directional beams as training-specific beams in the different directions, and sweeps the multiple training-specific beams in the different directions by using a plurality of antennas, so that at least one receiver measures at least one training-specific beam, and determines the channel knowledge according to the measurement result and beam-related information associated with the at least one training-specific beam, so as to achieve a technical effect of reducing training overhead.

8. 发明申请

US20180175971A1 METHODS AND DEVICES FOR SUB-BLOCK DECODING DATA SIGNALS 审中-公开
公开(公告)号：US20180175971A1
公开(公告)日：2018-06-21
申请号：US15836162
申请日：2017-12-08
申请人： INSTITUT MINES-TELECOM
发明人： Asma MEJRI , Ghaya REKAYA BEN-OTHMAN , Mohammed-Achraf KHSIBA
IPC分类号： H04L1/06 , H04B7/0413 , H04W4/00
CPC分类号： H04L1/0643 , H04B7/0413 , H04B7/0669 , H04B7/0891 , H04L1/0668 , H04L25/03191 , H04L25/03961 , H04W4/70 , H04W84/045
摘要： Embodiments of the invention provide a decoder for decoding a signal received through a transmission channel in a communication system, said signal comprising a vector of information symbols, wherein the decoder comprises: a processing unit (307) configured to determine at least one candidate set of division parameters and to perform a division of said vector of information symbols into a set of sub-vectors in association with each candidate set of division parameters, each pair of sub-vectors being associated with a division metric; a selection unit (309) configured to select one of said candidate sets of division parameters according to a selection criterion depending on said division metric; and a decoding unit (311) configured to determine at least one estimate of each sub-vector associated with said selected set of division parameters by applying a symbol estimation algorithm, wherein the decoder is configured to determine at least one estimate of the vector of information symbols from said at least one estimate of each sub-vector of information symbols.

9. 发明申请

US20170317786A1 Maximum likelihood detector and detecting method, and wireless signal receiver with maximum likelihood detection function 审中-公开
公开(公告)号：US20170317786A1
公开(公告)日：2017-11-02
申请号：US15465209
申请日：2017-03-21
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： CHUNG-YAO CHANG , WEI-CHIEH HUANG , YI-SYUN YANG
IPC分类号： H04L1/00 , H04L27/38
CPC分类号： H04L1/0054 , H04L25/03229 , H04L25/03961 , H04L25/067 , H04L27/38
摘要： The present disclosure includes an ML (Maximum Likelihood) detector. An embodiment of the ML detector comprises a search value selecting circuit and an ML detecting circuit. The search value selecting circuit is configured to select a search value according to a communication index and a modulation type or determine the search value according to a predetermined value, in which the communication index is related to a reception signal or a derivative thereof, the search value is associated with a search range, and a number of candidate signal value(s) in the search range is not greater than a number of all candidate signal values of the modulation type. The ML detecting circuit is configured to execute an ML calculation according to the search value and one of the reception signal and the derivative thereof, so as to calculate a log likelihood ratio of every candidate signal value in the search range.

10. 发明授权

US09692622B2 Equalization with noisy channel state information 有权
公开(公告)号：US09692622B2
公开(公告)日：2017-06-27
申请号：US14300658
申请日：2014-06-10
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Ali S. Khayrallah
IPC分类号： H03H7/40 , H04L25/03 , H04L25/02
CPC分类号： H04L25/03961 , H04L25/0242 , H04L25/03197
摘要： Systems and methods related to improved coherent demodulation and, in particular, improved channel equalization that accounts for variation in an effective channel estimation error with transmitted symbols are disclosed. In one embodiment, a wireless node includes a receiver front-end, a channel estimator, and an equalizer. The receiver front-end is adapted to output samples of a received signal. The channel estimator is adapted to estimate a channel between a transmitter of the received signal and the wireless node based on the samples of the received signal. The equalizer is adapted to process the samples of the received signal according to a modified equalization scheme that compensates for variation in an effective channel estimation error with transmitted symbols to thereby provide corresponding bit or symbol decisions. In this manner, channel equalization is improved, particularly for a wireless system that utilizes a modulation scheme with varying amplitude.

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