公开(公告)号：US11646923B2

公开(公告)日：2023-05-09

申请号：US17789319

申请日：2020-12-02

申请人： Istanbul Medipol Universitesi

发明人： Hüseyin Arslan ,  Ahmad Mohammad Abd-Alghani Jaradat

IPC分类号： H04L27/26 ,  H04L5/00 ,  H04L27/30

CPC分类号： H04L27/2602 ,  H04L5/0007 ,  H04L5/0053 ,  H04L27/2614 ,  H04L27/30

摘要： A method based on orthogonal frequency division multiplexing (OFDM) called OFDM-subcarrier gap and index modulation (OFDM-SGIM) is proposed in which the gaps between the active subcarriers are exploited to transmit extra bits alongside the conventional QAM symbols. Thereafter, the index modulation is combined with the new proposed OFDM-based scheme to guarantee a fixed subblock size.

公开(公告)号：US10778373B2

公开(公告)日：2020-09-15

申请号：US14321297

申请日：2014-07-01

申请人： Carl M Elam

发明人： Carl M Elam

IPC分类号： H04L27/30 ,  H04L1/06 ,  H04B7/08

摘要： Methods and systems consistent with this invention receive a plurality of transmitted signals in a receiver having a plurality of receive elements, wherein each transmitted signal has a different spatial location. Such methods and systems receive the plurality of transmitted signals at the plurality of receive elements to form a plurality of receive element signals, form a combined signal derived from the plurality of receive element signals, and detect each of the plurality of transmitted signals from the combined signal by its different spatial location. To achieve this, methods and systems consistent with this invention generate a plurality of arbitrary phase modulation signals, and phase modulate each of the plurality of receive element signals with a different one of the phase modulation signals to form a plurality of phase modulated signals. Such methods and systems then combine the plurality of phase modulated signals into a combined signal, generate expected signals, and cross-correlate the combined signal with the expected signals to form correlation signals. Such methods and systems then store the correlation signals in a correlation signal memory and analyze the correlation signals to extract information from the transmitted signals.

公开(公告)号：US10284407B2

公开(公告)日：2019-05-07

申请号：US15777761

申请日：2016-11-30

申请人： IDAC HOLDINGS, INC.

发明人： Erdem Bala ,  Mihaela C. Beluri ,  Kyle Jung-Lin Pan ,  Tao Deng ,  Liangping Ma ,  Yugeswar Deenoo ,  Ravikumar V. Pragada ,  Alphan Sahin

IPC分类号： H04L27/30 ,  H04L27/26

摘要： Methods and systems for operation in a wireless network are provided, the method including receiving modulated data symbols and zeros in a frequency-domain, and mapping in the frequency-domain the modulated data symbols and zeros in an interleaved manner to sub-carriers within a resource allocation. The method further includes generating a time-domain data signal based on the mapped sub-carriers, and generating a time domain cancellation signal by sign inverting and repeating a predetermined number of time-domain samples at a tail portion of the data signal. The method further includes combining the time-domain data signal and the time domain cancellation signal to generate an exact zero tail data signal such that the exact zero tail data signal has a zero tail length equal to the predetermined number of time-domain samples, and transmitting the exact zero tail data signal.

公开(公告)号：US09276787B2

公开(公告)日：2016-03-01

申请号：US12411263

申请日：2009-03-25

申请人： Kapil Bhattad ,  Ravi Palanki ,  Dexu Lin

发明人： Kapil Bhattad ,  Ravi Palanki ,  Dexu Lin

IPC分类号： H04L27/10 ,  H04L5/00 ,  H04L25/49 ,  H04L27/30 ,  H04L1/00 ,  H04L27/26

CPC分类号： H04L27/10 ,  H04L1/0057 ,  H04L5/0053 ,  H04L5/0091 ,  H04L25/4902 ,  H04L27/2647 ,  H04L27/30

摘要： Techniques for sending signaling messages with beacon signals in a wireless communication network are described. In one design, a transmitter station may map a signaling message (e.g., a reduce interference request) to multiple code symbols. The transmitter station may select multiple resource elements from among a plurality of resource elements based on the multiple code symbols. In one design, each code symbol may be sent across frequency by selecting one of multiple subcarriers in one symbol period. In another design, each code symbol may be sent across time by selecting one of multiple symbol periods on one subcarrier. The transmitter station may generate a beacon signal having transmit power on the selected resource elements and no transmit power on remaining resource elements. The transmitter station may send the beacon signal to at least one receiver station.

摘要翻译： 描述了在无线通信网络中用信标信号发送信令消息的技术。 在一种设计中，发射机站可以将信令消息（例如，减少干扰请求）映射到多个码符号。 发射机站可以基于多个码符号从多个资源元素中选择多个资源元素。 在一种设计中，可以通过在一个符号周期中选择多个子载波中的一个来在频率上发送每个码元。 在另一种设计中，可以通过在一个子载波上选择多个符号周期之一来跨越时间发送每个码元。 发射机站可以生成具有在所选择的资源单元上的发射功率并且在剩余的资源单元上没有发射功率的信标信号。 发射机站可以将信标信号发送到至少一个接收机站。

公开(公告)号：US09059881B2

公开(公告)日：2015-06-16

申请号：US14051194

申请日：2013-10-10

申请人： Texas Instruments Incorporated

发明人： Mohamed Farouk Mansour ,  Lars Jorgensen

IPC分类号： H04L27/30 ,  H04L25/06 ,  H04L27/34 ,  H04L27/38

CPC分类号： H04L25/067 ,  H04L27/3411 ,  H04L27/38

摘要： Embodiments of the invention provide a method of decoding of hexagonal constellations. The decoding methods exploit the inherent structure of the hexagonal grid to eliminate/minimize the requirements for distance computations. A constellation which has unused constellation points is received. A plurality of lookup tables is used for indicating whether a particular constellation point is used. The lookup tables are indexed using the two integers u and v. An initial estimate ū and v is found. The Euclidean distance to the immediate neighbors resulting in the immediate upper and lower integers for ū and v is computed. From the distance to the nearest neighbor, the log-likelihood ratio value is computed.

摘要翻译： 本发明的实施例提供了一种对六角形星座进行解码的方法。 解码方法利用六角网格的固有结构来消除/最小化距离计算的要求。 接收到具有未使用的星座点的星座。 多个查找表用于指示是否使用特定的星座点。 查找表使用两个整数u和v进行索引，找到初始估计ū和v。 计算与直接邻居的欧几里德距离，导致ū和v的立即上下整数。 从距离到最近的邻居，计算对数似然比值。

公开(公告)号：US08594152B2

公开(公告)日：2013-11-26

申请号：US13345057

申请日：2012-01-06

申请人： Ulo Parts ,  Anders Ostergaard Nielsen ,  Kaj Jansen

发明人： Ulo Parts ,  Anders Ostergaard Nielsen ,  Kaj Jansen

IPC分类号： H04L27/30

CPC分类号： H04B7/2681 ,  H04B1/70735 ,  H04B1/70752 ,  H04B1/7083 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04J11/0073 ,  H04W56/0085

摘要： A communications network and method thereof include a base station controller configured to provide a repetition period of a primary synchronization channel to be equal to a predetermined integer value times a scrambling code length of the scrambling code of a common pilot channel. A user equipment in the network is configured to search for a known sequence comprising the primary synchronization channel to select a cell and a corresponding sub-frame/symbol timing from the selected cell.

摘要翻译： 通信网络及其方法包括：基站控制器，被配置为将主同步信道的重复周期提供给等于预定整数值乘以公共导频信道的扰码的扰码长度。 网络中的用户设备被配置为搜索包括主同步信道的已知序列以从所选择的小区中选择小区和对应的子帧/符号定时。

公开(公告)号：US08170081B2

公开(公告)日：2012-05-01

申请号：US12802976

申请日：2010-06-16

申请人： Antonio Forenza ,  Stephen G. Perlman

发明人： Antonio Forenza ,  Stephen G. Perlman

IPC分类号： H04L27/30

CPC分类号： H04B17/0042 ,  H04B7/0417 ,  H04B17/24 ,  H04B17/309 ,  H04B17/318 ,  H04B17/345 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0057 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0226 ,  H04L25/0248 ,  H04L25/03343 ,  H04L27/2655 ,  H04L2025/03414 ,  H04L2025/0342 ,  H04L2025/03426 ,  H04L2025/03802

摘要： A machine-implemented system and method are described for removing interference between adjacent distributed-input-distributed-output (DIDO) clusters comprising. For example, a method according to one embodiment comprises: detecting signal strength at a first client from a main DIDO cluster; detecting interference signal strength at the first client from an interfering DIDO cluster; if the signal strength from the main DIDO cluster reaches a specified value relative to the value of the interference signal strength from the interfering DIDO cluster, then generating channel state information (CSI) defining channel state between one or more antennas of the first client and one or more antennas of the interfering DIDO cluster; transmitting the CSI from the first client to a base transceiver station (BTS) in the interfering DIDO cluster; and implementing DIDO precoding with inter-DIDO-cluster interference (IDCI) cancellation at the BTS in the interfering DIDO cluster to avoid RF interference at the first client.

摘要翻译： 描述了用于消除相邻分布式输入分布式输出（DIDO）群集之间的干扰的机器实现的系统和方法，包括。 例如，根据一个实施例的方法包括：从主DIDO簇检测第一客户端处的信号强度; 从干扰DIDO簇检测第一客户端处的干扰信号强度; 如果来自主DIDO簇的信号强度相对于来自干扰DIDO簇的干扰信号强度的值达到指定值，则产生定义第一客户端的一个或多个天线之间的信道状态的信道状态信息（CSI）和一个 或更多的干扰DIDO簇的天线; 将CSI从第一客户端发送到干扰DIDO簇中的基站收发器（BTS）; 并且在干扰DIDO簇中的BTS处实施DIDO簇间干扰（IDCI）消除的DIDO预编码，以避免在第一客户端处的RF干扰。

公开(公告)号：US08116351B2

公开(公告)日：2012-02-14

申请号：US12615761

申请日：2009-11-10

申请人： Chang-Soo Koo ,  Angelo Cuffaro ,  Sung-Hyuk Shin

发明人： Chang-Soo Koo ,  Angelo Cuffaro ,  Sung-Hyuk Shin

IPC分类号： H04L27/30

CPC分类号： H04W52/362 ,  H04W52/12 ,  H04W52/143 ,  H04W52/34 ,  H04W52/367

摘要： An apparatus and method is provided for dynamic range power control of a wireless downlink communication signal, such that target signal quality adjustments are held temporarily when it is apparent that transmit power control commands will not produce the desired response at the transmitting station. Comparisons of measured received signals to thresholds are performed to determine whether the transmitting station has either reached the maximum or minimum transmit power, in which case the target signal quality adjustment is controlled accordingly. When normal transmit power is detected, the target signal quality adjustments are allowed to resume as usual.

摘要翻译： 提供了一种用于无线下行链路通信信号的动态范围功率控制的装置和方法，使得当显然发射功率控制命令在发射台处不产生期望的响应时，暂时保持目标信号质量调整。 执行测量的接收信号与阈值的比较，以确定发射站是否达到最大或最小发射功率，在这种情况下相应地控制目标信号质量调整。 当检测到正常的发射功率时，允许目标信号质量调整恢复正常。

公开(公告)号：US07953138B2

公开(公告)日：2011-05-31

申请号：US12910485

申请日：2010-10-22

申请人： Mark Kent ,  Vinko Erceg ,  Jun Zheng

发明人： Mark Kent ,  Vinko Erceg ,  Jun Zheng

IPC分类号： H04L27/30

CPC分类号： H04L5/143 ,  H04B7/0417 ,  H04B7/0639 ,  H04L25/0204 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03808

摘要： A method and system for processing communication signals is provided and may comprise, quantizing a channel estimate at a MIMO receiver onto a codebook based on a cost function, wherein the codebook comprises a plurality of unitary matrices. A codebook index may be fed back from the MIMO receiver to a MIMO transmitter, wherein the codebook index is associated with one of the plurality of unitary matrices that minimizes the cost function. The cost function may be minimized by choosing a smallest scalar cost from a plurality of scalar costs, wherein each one of the scalar costs is generated from one or more sums and one or more products of elements of a product matrix, and wherein the product matrix is generated from one of the plurality of unitary matrices, a matrix comprising the channel estimate, and their respective Hermitian Transposes.

摘要翻译： 提供了一种用于处理通信信号的方法和系统，并且可以包括：基于成本函数将MIMO接收机处的信道估计量化到码本上，其中码本包括多个酉矩阵。 码本索引可以从MIMO接收机反馈到MIMO发射机，其中，码本索引与使成本函数最小化的多个酉矩阵中的一个相关联。 可以通过从多个标量成本中选择最小标量成本来最小化成本函数，其中每个标量成本是从产品矩阵的一个或多个和的乘积和一个或多个乘积的乘积产生的，并且其中产品矩阵 从多个酉矩阵中的一个生成矩阵，包括信道估计的矩阵以及它们各自的厄米转移。

公开(公告)号：US07822102B2

公开(公告)日：2010-10-26

申请号：US11767158

申请日：2007-06-22

申请人： Mark Kent ,  Vinko Erceg ,  Jun Zheng

发明人： Mark Kent ,  Vinko Erceg ,  Jun Zheng

IPC分类号： H04L27/30

CPC分类号： H04B7/0417 ,  G06Q30/0283 ,  H04B7/0626 ,  H04B7/0639 ,  H04B7/0854

摘要： Aspects of a method and system for an efficient channel quantization method or MIMO pre-coding systems may include quantizing channel state information in a MIMO pre-coding system onto a codebook, which comprises one or more unitary matrices, using a cost function; selecting a quantization function that enables the quantizing based on a number of receive antennas and a number of transmit antennas associated with the MIMO pre-coding system; and selecting the cost function from a set of cost functions based on the number of receive antennas and the number of transmit antennas. The channel state information may be a matrix Ĥ. The set of cost functions may comprise function f(A), which may be defined by the following relationships: f ⁡ ( A ) = ∑ i = 1 N ⁢ ⁢ ∑ j = 1 , j ≠ i N ⁢ ⁢  a i , j  2 ⁢ ⁢ and / or ⁢ ⁢ f ⁡ ( A ) = ∑ i = 1 N ⁢ ⁢ ∑ j = 1 , j ≠ i N ⁢ ⁢  a i , j  2 - ∑ i = 1 N ⁢ ⁢ a i , i where A is a matrix of size N by N and aij is element (i,j) of matrix A.

摘要翻译： 用于有效信道量化方法或MIMO预编码系统的方法和系统的方面可以包括：使用成本函数将MIMO预编码系统中的信道状态信息量化到包括一个或多个酉矩阵的码本上; 选择能够基于多个接收天线进行量化的量化函数和与MIMO预编码系统相关联的多个发射天线; 以及基于接收天线的数量和发射天线的数量从一组成本函数中选择成本函数。 信道状态信息可以是矩阵Ĥ。 一组成本函数可以包括函数f（A），其可以由以下关系定义：f⁡（A）=Σi = 1 N笨Σj = 1，j≠i Nüüai，j 庇2⁢or⁡⁡⁡⁡⁡ΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣ 其中A是N乘N的矩阵，aij是矩阵A的元素（i，j）。