公开(公告)号：US20070147538A1

公开(公告)日：2007-06-28

申请号：US11643340

申请日：2006-12-20

Applicant: Yun-Ho Jung ,  Yun-Sang Park ,  Bong-Gee Song ,  Young-Hak Kim ,  Byung-Tae Kang ,  Min-Cheol Park ,  In-Hyoung Kim ,  Hae-Dong Yeon

Inventor： Yun-Ho Jung ,  Yun-Sang Park ,  Bong-Gee Song ,  Young-Hak Kim ,  Byung-Tae Kang ,  Min-Cheol Park ,  In-Hyoung Kim ,  Hae-Dong Yeon

IPC: H04L1/02

CPC classification number: H04B7/0845 ,  H04L1/0631 ,  H04L1/0656

Abstract: An apparatus and method for canceling an interference signal in a broadband wireless communication system are provided. A receiver of a wireless communication system includes at least two receive antennas for receiving a target signal of a serving base station and interference signals of at least one neighbor base station; a channel estimator for estimating channels of the signals received through the receive antennas; and a detector for detecting the target signal using channel estimation values of the received signals. Accordingly, it is possible to reduce error propagation caused by the incorrect estimation and detection of the interference signal. In addition, time delay for detecting/restoring/removing the interference signal does not occur. Moreover, the increase of additional buffers can be prevented. Consequently, the increase of hardware complexity can be prevented.

Abstract translation: 提供一种用于在宽带无线通信系统中消除干扰信号的装置和方法。 无线通信系统的接收机包括用于接收服务基站的目标信号和至少一个相邻基站的干扰信号的至少两个接收天线; 用于估计通过接收天线接收的信号的信道的信道估计器; 以及检测器，用于使用所接收信号的信道估计值来检测目标信号。 因此，可以减少由误差估计和干扰信号的检测引起的误差传播。 此外，不发生用于检测/恢复/去除干扰信号的时间延迟。 此外，可以防止额外的缓冲器的增加。 因此，可以防止硬件复杂性的增加。

公开(公告)号：US20070064828A1

公开(公告)日：2007-03-22

申请号：US11187495

申请日：2005-07-22

Applicant: Carlos Aldana ,  Rajendra Moorti ,  Christopher Young

Inventor： Carlos Aldana ,  Rajendra Moorti ,  Christopher Young

IPC: H04L1/02

CPC classification number: H04L1/0656 ,  H04L1/0071 ,  H04L25/0208 ,  H04L25/0212 ,  H04L25/0242

Abstract: Various aspects of a method for and system for multiple input multiple output (MIMO) channel estimation are presented. Aspects of a method for computing channel estimates in a radio frequency (RF) communications system may comprise decomposing a direct matrix computation into a plurality of constituent matrices, and jointly computing a plurality of channel estimates for a corresponding plurality of channel estimate streams received via a plurality of RF channels based on at least a portion of the plurality of constituent matrices. Aspects of a system for computing channel estimates in an RF communications system may comprise a receiver that decomposes a direct matrix computation into a plurality of constituent matrices, and jointly computes a plurality of channel estimates for a corresponding plurality of channel estimate streams received via a plurality of RF channels based on at least a portion of the plurality of constituent matrices.

Abstract translation: 提出了多输入多输出（MIMO）信道估计的方法和系统的各个方面。 用于计算射频（RF）通信系统中的信道估计的方法的方面可以包括将直接矩阵计算分解为多个构成矩阵，并且共同计算经由以下各项接收的相应多个信道估计流的多个信道估计： 基于多个构成矩阵的至少一部分的多个RF信道。 用于在RF通信系统中计算信道估计的系统的方面可以包括将直接矩阵计算分解为多个构成矩阵的接收机，并且共同计算经由多个接收的相应多个信道估计流的多个信道估计 基于所述多个构成矩阵的至少一部分的RF信道。

公开(公告)号：US20070041458A1

公开(公告)日：2007-02-22

申请号：US11465020

申请日：2006-08-16

Applicant: Dale Hocevar ,  Anuj Batra

Inventor： Dale Hocevar ,  Anuj Batra

IPC: H04K1/10 ,  H04L5/12 ,  H04L1/02

CPC classification number: H04L1/0656 ,  H04L1/0041 ,  H04L1/0057 ,  H04L1/0068 ,  H04L1/08 ,  H04L27/2602

Abstract: Transceiver circuitry for use in a multiple-input, multiple-output (MIMO), orthogonal frequency-division multiplexing (OFDM), communications environment, is disclosed. Error correction coding according to a fixed-block size code, such as low density parity check (LDPC) coding, is implemented. The codeword length, and codeword arrangement, are selected by determining a minimum number of OFDM symbol periods required for a payload size, and the number of available information bits in those symbol periods. A rule-based approach, for example in a table, is used to select the codeword length, and the number of codewords required. Shortening is then applied to the code, followed by determining whether puncturing or repeating of bits is necessary to efficiently use the available OFDM symbols.

Abstract translation: 公开了用于多输入，多输出（MIMO），正交频分复用（OFDM），通信环境中的收发器电路。 实现了诸如低密度奇偶校验（LDPC）编码之类的固定块大小码的纠错编码。 通过确定有效载荷大小所需的OFDM符号周期的最小数目以及那些符号周期中的可用信息比特数来选择码字长度和码字排列。 例如在表中使用基于规则的方法来选择码字长度和所需的码字数量。 然后将缩短应用于代码，随后确定是否需要打孔或重复位以有效地使用可用的OFDM符号。

公开(公告)号：US20060280206A1

公开(公告)日：2006-12-14

申请号：US11390499

申请日：2006-03-28

Applicant: Paul Marko

Inventor： Paul Marko

IPC: H04J3/18 ,  H04J3/04

CPC classification number: H04L1/0059 ,  H03M13/23 ,  H03M13/27 ,  H03M13/2936 ,  H03M13/3761 ,  H03M13/6362 ,  H04L1/0041 ,  H04L1/0054 ,  H04L1/0057 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/0656 ,  H04L1/08

Abstract: A method and apparatus encode a source data stream via convolutional encoding. Plural encoded data streams are interleaved and transmitted on plural transmission channels. Data groups generated via convolutional encoding are interleaved via time-interleaving functions to disperse selected bits within puncture groups of the data groups, bits in between data groups, and bits in selected sets of data groups to facilitate reconstruction of the source data stream from at least a portion of the interleaved data stream received on at least one transmission channel. The time-interleaving functions are selected to facilitate reconstruction of the source data stream from one transmission channel following continuous blockage. Subsets of bits of puncture groups are selected to allow reconstruction of the source data stream from more than one of the transmission channels using a minimum number of subsets. Multiple combinations of subsets can be received on both transmission channels to reconstruct the source data stream following blockage of one channel. Decoding is performed via a Viterbi decoder.

Abstract translation: 一种通过卷积编码对源数据流进行编码的方法和装置。 多个编码数据流被交织并在多个传输信道上传输。 经由卷积编码生成的数据组经由时间交织功能进行交织，以分散数据组的穿孔组中的选定位，数据组之间的位，以及所选择的数据组组中的位，以便至少从源数据流重建 交织的数据流的一部分在至少一个传输信道上接收。 选择时间交织功能以便于在连续阻塞之后从一个传输信道重建源数据流。 选择穿孔组的比特组以允许使用最小数量的子集从多于一个传输信道重构源数据流。 可以在两个传输信道上接收子集的多个组合，以在一个信道被阻塞之后重构源数据流。 通过维特比解码器进行解码。

公开(公告)号：US20060146965A1

公开(公告)日：2006-07-06

申请号：US11324715

申请日：2006-01-03

Applicant: Jong-Hyung Kwun ,  Chan-Soo Hwang ,  Kyung-Chun Lee ,  Joo-Hwan Chun

Inventor： Jong-Hyung Kwun ,  Chan-Soo Hwang ,  Kyung-Chun Lee ,  Joo-Hwan Chun

IPC: H03D1/00 ,  H04L1/02

CPC classification number: H04L1/0054 ,  H04B7/08 ,  H04L1/0656

Abstract: A signal detection method and apparatus in a receiver in a MIMO mobile communication system. The receiver orders symbol combinations transmittable from a transmitter in an ascending order of the difference between the symbol combinations and transmit symbols produced by eliminating inter-symbol interference from a received signal, initializes a symbol combination with the minimum difference to an ML solution, calculates the distance between a first symbol combination and the transmit symbols and the cost of a second symbol combination, detects a symbol combination having a distance to the transmit symbols equal to the distance between the first symbol combination and the transmit symbols, and having a minimum distance, and decides the first symbol combination as the ML solution if the minimum distance exceeds the distance between the first symbol combination and the transmit symbols.

Abstract translation: MIMO移动通信系统中的接收机中的信号检测方法和装置。 接收机按照从接收到的信号消除符号间干扰产生的符号组合和发送符号之间的差异的升序顺序发送来自发送器的符号组合，将具有最小差异的符号组合初始化为ML解，计算出 第一符号组合与发送符号之间的距离和第二符号组合的成本检测具有等于第一符号组合和发送符号之间的距离的发射符号的距离并且具有最小距离的符号组合， 并且如果最小距离超过第一符号组合和发送符号之间的距离，则将第一符号组合确定为ML解。

公开(公告)号：US20060002414A1

公开(公告)日：2006-01-05

申请号：US10872578

申请日：2004-06-21

Applicant: Jianxuan Du ,  Andreas Molisch ,  Jinyun Zhang

Inventor： Jianxuan Du ,  Andreas Molisch ,  Jinyun Zhang

IPC: H04L12/28 ,  H04L12/56

CPC classification number: H04L1/0002 ,  H04L1/0019 ,  H04L1/0656

Abstract: A method allocates data rates to layers to be transmitted in a multiple input, multiple output communications system. An input data stream is demultiplexed into multiple layers. For each layer, determine statistics representing a capacity of the layer based on past observations of transmitting the layer through a channel. For each layer, determine an optimum data rate based on the statistics. For each layer, determine if the optimum data rate is less than a minimum data rate of a set of available bit rates, and, if true, selecting, for a particular layer, the minimum data rate from the set of available data rates, and otherwise, if false, selecting, for the particular layer, a closest data rate from the set of available data rates that is less than the optimum data rate.

Abstract translation: 一种方法将数据速率分配给要在多输入多输出通信系统中发送的层。 输入数据流被解复用为多层。 对于每个层，基于通过信道传输层的过去观察来确定表示层的容量的统计信息。 对于每一层，根据统计数据确定最佳数据速率。 对于每个层，确定最佳数据速率是否小于一组可用比特率的最小数据速率，并且如果为真，则从一组可用数据速率为特定层选择最小数据速率，以及 否则，如果为false，则对于特定层，从小于最佳数据速率的可用数据速率集合中选择最接近的数据速率。

公开(公告)号：US06934320B2

公开(公告)日：2005-08-23

申请号：US10127327

申请日：2002-04-19

Applicant: Djordje Tujkovic ,  Emiliano Sottani

Inventor： Djordje Tujkovic ,  Emiliano Sottani

IPC: H04J15/00 ,  H04B20060101 ,  H04B1/707 ,  H04B7/02 ,  H04B7/04 ,  H04B7/10 ,  H04B7/26 ,  H04L1/00 ,  H04Q7/38

CPC classification number: H04L1/006 ,  H04B1/707 ,  H04B7/10 ,  H04L1/0071 ,  H04L1/0656

Abstract: A method and system for processing information data in a wireless communications system for reducing the complexity in spatial multiplexing of signals over different transmit antennas. In orthogonalized spatial multiplexing with the resolution of one, encoded data are interleaved and converted into a plurality of parallel sub-streams. Each sub-stream is then spreaded with a user specific spreading code with an intentional delay offset of few chips prior to modulating the encoded data for transmission. Likewise, in orthogonalized spatial multiplexing with the resolution of two, encoded data are interleaved and converted into a plurality of parallel sub-stream pairs. Each sub-stream pair is spreaded pairwise with a user specific spreading code with an intentional delay offset of few chips.

Abstract translation: 一种在无线通信系统中处理信息数据的方法和系统，用于降低在不同发射天线上信号的空间复用的复杂度。 在分辨率为1的正交空间复用中，编码数据被交织并转换成多个并行子流。 然后，在调制用于传输的编码数据之前，用用户特定的扩展码分散每个子流，其具有少量芯片的有意延迟偏移。 类似地，在具有二分辨率的正交空间复用中，编码数据被交织并转换成多个并行子流对。 每个子流对与用户特定的扩展码成对扩展，具有少量芯片的有意延迟偏移。

公开(公告)号：US20050174932A1

公开(公告)日：2005-08-11

申请号：US10829261

申请日：2004-04-22

Applicant: Juinn-Horng Deng ,  Jwo-Yuh Wu ,  Ta-Sung Lee

Inventor： Juinn-Horng Deng ,  Jwo-Yuh Wu ,  Ta-Sung Lee

IPC: H04B7/02 ,  H04J11/00 ,  H04L1/06 ,  H04L5/02 ,  H04Q7/00

CPC classification number: H04B7/02 ,  H04L1/0643 ,  H04L1/0656 ,  H04L5/0026 ,  H04L25/0204 ,  H04L25/0242 ,  H04L2025/03426

Abstract: The present invention discloses a MIMO system and method, which is suitable for MC-CDMA communication system with multiple paths to obtain the spectrum efficiency and gain simultaneously. The transceiver includes steps of simultaneously transferring a transmitting data to a plurality of parallel data streams, and space time block encoding each data. Then, spreading the encoded data streams with a pre-designed space-path spreading code, and transmitting data with the transmit antennas through a multiple paths. Finally, at each receiver, despreading received data by the matched filters, and separating mutually interfering signal with a linear combiner and a BLAST detector to obtain the diversity gain.

Abstract translation: 本发明公开了一种MIMO系统和方法，适用于具有多个路径的MC-CDMA通信系统，以同时获得频谱效率和增益。 收发器包括同时将发送数据传送到多个并行数据流的步骤，以及对每个数据进行空间时间块编码。 然后，利用预先设计的空间路径扩展码扩展编码数据流，并通过多个路径与发送天线发送数据。 最后，在每个接收机处，通过匹配滤波器对接收到的数据进行解扩，并且将相互干扰的信号与线性组合器和BLAST检测器分离以获得分集增益。

公开(公告)号：US20050147177A1

公开(公告)日：2005-07-07

申请号：US10946342

申请日：2004-09-22

Applicant: Dong-Youn Seo ,  Bong-Hoe Kim

Inventor： Dong-Youn Seo ,  Bong-Hoe Kim

IPC: H04B7/04 ,  H04B1/707 ,  H04B7/06 ,  H04L1/00 ,  H04L1/02 ,  H04L1/06 ,  H04L25/02 ,  H04Q20060101

CPC classification number: H04L1/0009 ,  H04B1/71055 ,  H04B7/0413 ,  H04B7/061 ,  H04B7/0632 ,  H04B7/0691 ,  H04B7/0697 ,  H04B7/0854 ,  H04L1/0003 ,  H04L1/0026 ,  H04L1/0656 ,  H04L1/0675

Abstract: A method of controlling signal transmission in a Multiple Input Multiple Output (MIMO) communication system including selecting a modulation and code set (MCS) for each of M data streams transmitted via M transmitting antennas in a transmitting side of the MIMO system, and selectively selecting M-1 or fewer transmitting antennas from the M transmitting antennas for transmitting the data streams based on channel quality information indicative of a transmission performance of the selected MCS corresponding to each of the M transmitting antennas. In another example, the present invention provides a novel method of controlling signal transmission in a MIMO communication system including selecting M weight vectors for streams transmitted by each of M transmitting antennas in a transmitting side of the MIMO system, and selectively selecting M-1 or fewer streams and weight vectors from the M weight vectors for transmitting data streams based on channel quality information indicative of transmission performance of the selected weight vectors corresponding to each of the M vector spaces.

Abstract translation: 一种在多输入多输出（MIMO）通信系统中控制信号传输的方法，包括：通过在MIMO系统的发送侧经由M个发送天线发送的每个M个数据流选择调制和码集（MCS），并选择性地选择 基于用于发送数据流的M-1个或更少的发射天线，用于基于指示与每个M个发射天线相对应的所选择的MCS的传输性能的信道质量信息。 在另一个例子中，本发明提供了一种控制MIMO通信系统中的信号传输的新方法，包括选择MIMO系统的发射侧的每个M个发射天线发送的流的M个权重向量，并选择性地选择M-1或 基于指示对应于每个M个向量空间的所选权重向量的传输性能的信道质量信息，来自用于发送数据流的M个权重向量的较少的流和权重向量。

公开(公告)号：US20050141631A1

公开(公告)日：2005-06-30

申请号：US10941809

申请日：2004-09-16

Applicant: Hiroaki Takano

Inventor： Hiroaki Takano

IPC: H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04B7/26 ,  H04J11/00 ,  H04L1/02 ,  H04L1/06

CPC classification number: H04L1/0656 ,  H04B7/0417 ,  H04B7/0615 ,  H04B7/0842

Abstract: The invention realizes an SVD-MIMO transmission having resistance to the variations in the channel characteristic, which saves the feedback from the receiver to the transmitter. The receiver updates the current one into a new channel matrix Hnew every 100 OFDM symbols, and performs the reception processing by updating the current one into a new decoding weight matrix Unew acquired by the singular value decomposition of the channel matrix Hnew. On the other hand, the transmitter continues to use the original transmission weight matrix V. The diagonal matrix D is turned into a non-diagonal matrix because of the variations in the channel characteristic, where the elements except for the diagonal elements take the values except for zero. This shows that cross talks are generated at this moment. The receiver acquires the cross talk gains, and cancels the cross talk signals of the reception signal to thereby realize the signal transmission without cross talks in consequence.

Abstract translation: 本发明实现了具有抵抗信道特性变化的SVD-MIMO传输，其保存了从接收机到发射机的反馈。 接收机将每100个OFDM符号将当前的一个更新为新的信道矩阵H新的，并且通过将当前的更新更新为新的解码加权矩阵U N来执行接收处理。 通过信道矩阵H新的的奇异值分解获得。 另一方面，发射机继续使用原始传输权重矩阵V.由于信道特性的变化，对角线矩阵D变为非对角矩阵，其中除对角线元素之外的元素取除除 为零。 这表明交叉谈话是在这个时刻产生的。 接收机获取串扰增益，并且消除接收信号的串扰信号，从而实现信号传输而不会交叉地进行交谈。