公开(公告)号：US20060274836A1

公开(公告)日：2006-12-07

申请号：US11445377

申请日：2006-05-31

Applicant: Hemanth Sampath ,  Tamer Kadous

Inventor： Hemanth Sampath ,  Tamer Kadous

IPC: H04B14/04 ,  H04L1/02

CPC classification number: H04L25/03242 ,  H03M13/45 ,  H04B7/04 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0048 ,  H04L1/0066 ,  H04L1/06 ,  H04L1/0631 ,  H04L1/0656 ,  H04L25/03197 ,  H04L27/2601 ,  H04L27/38 ,  H04L2025/03414

Abstract: Methods and apparatuses for decoding codewords received over a MIMO channel are provided. According to one aspect of the disclosure, a cost function is computed for each constellation point of an Mth rank or spatial layer, and Ncand of those constellation points having minimum cost are preserved as candidate points, where Ncand is a parameter specified to the decoding algorithm. In addition, a cost function may be computed for all possible transitions from the Ncand candidate points of the Mth rank to all possible constellation points of the (M-1)th spatial layer, and Ncand of those transitions having minimum cost are preserved as candidate points. The process is repeated for all spatial layers, resulting in the identification of Ncand candidate codewords and their associated cost functions.

Abstract translation: 提供了用于解码通过MIMO信道接收的码字的方法和装置。 根据本公开的一个方面，针对第M等级或空间层的每个星座点计算成本函数，并且将具有最小成本的那些星座点的N≠N保存为候选点，其中N cand 是对解码算法指定的参数。 另外，对于从第M级的N个候选点到第（M-1）个空间层的所有可能的星座点的所有可能的转换，可以计算成本函数，并且N _{cand 被保留为候选点。 对所有空间层重复该过程，导致识别N候选码字及其相关联的成本函数。}

公开(公告)号：US20060221898A1

公开(公告)日：2006-10-05

申请号：US10553411

申请日：2004-03-17

Applicant: Martin Bossert ,  Elena Costa ,  Axel Hubner ,  Matthias Lott ,  Egon Schulz

Inventor： Martin Bossert ,  Elena Costa ,  Axel Hubner ,  Matthias Lott ,  Egon Schulz

IPC: H04Q7/00

CPC classification number: H04L27/2602 ,  H04B7/0669 ,  H04B7/0671 ,  H04L1/0656 ,  H04L27/2626

Abstract: A method transmits data by radio during which a frequency band is split into a plurality of subcarriers, and a plurality of antennas are used for transmitting. The data are split into a number of elements, which are to be respectively transmitted by each antenna, said number of elements corresponding to the number of subcarriers, whereby for each antenna, each element is respectively assigned to a subcarrier for transmitting, and at least two antennas on at least one subcarrier transmit different elements. Before an OFDM modulation for each antenna, each element is multiplied by an antenna-specific and element-specific factor. Alternatively, after an OFDM modulation for at least one antenna, the time sequence of the time-dependent signal generated on the basis of the OFDM modulation is reordered. A transmitter carries out the method.

Abstract translation: 一种方法是通过无线电发送数据，在此期间将频带分割为多个子载波，并且使用多个天线进行发送。 将数据分割成若干要由各天线分别发送的元件，所述元件的数量对应于子载波数，由此对于每个天线，每个元件分别被分配给用于传输的子载波，并且至少 至少一个副载波上的两个天线发射不同的元件。 在每个天线的OFDM调制之前，每个元素乘以天线特定的和元素特定的因子。 或者，在至少一个天线的OFDM调制之后，重新排列基于OFDM调制生成的时间相关信号的时间序列。 发射机执行该方法。

公开(公告)号：US07116724B2

公开(公告)日：2006-10-03

申请号：US10200211

申请日：2002-07-23

Applicant: Cheol Woo You

Inventor： Cheol Woo You

IPC: H04B7/02 ,  H04L1/02

CPC classification number: H04L1/0065 ,  H04B7/0613 ,  H04L1/0059 ,  H04L1/0071 ,  H04L1/0625 ,  H04L1/0656

Abstract: Disclosed is a signal transmitting and receiving method and system in a mobile communication system provided with a plurality of antennas. The signal transmitting method in the mobile communication system that transmits a signal through a plurality of antennas includes separating by layers and primarily encoding input data for an independent signal generation interleaving in space and time the primarily encoded data of the respective layers, receiving and secondarily encoding the interleaved data, and transmitting the secondarily encoded data through the plurality of antennas.

Abstract translation: 公开了一种设置有多个天线的移动通信系统中的信号发送和接收方法和系统。 通过多个天线发送信号的移动通信系统中的信号发送方法包括分层，主要编码用于空间中的独立信号生成交织的输入数据，并且分别对各层的主编码数据进行编码，接收和二次编码 交错数据，以及通过多个天线发送二次编码数据。

公开(公告)号：US07110350B2

公开(公告)日：2006-09-19

申请号：US10793712

申请日：2004-03-05

Applicant: Jian Li ,  Jianhua Liu

Inventor： Jian Li ,  Jianhua Liu

IPC: H04J9/00 ,  H04Q7/00 ,  H04L1/02

CPC classification number: H04L1/0059 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/0656 ,  H04L27/2602

Abstract: A system and method for enhancing the data rate of a WLAN. Through the deployment of a MIMO system, the data rate ordinarily expected of a SISO type system can be doubled. Yet, the MIMO system of the present invention can remain backward compatible with conventional WLAN standards implemented by typical SISO type system. In particular, the packet preamble of the MIMO packet of the present invention is similar to that of a conventional SISO system so as to be backward compatible with conventional SISO receivers. Additionally, the data model of the MIMO system can be configured to support the detection of symbols in the MIMO packet of the present invention. Importantly, the present invention can include a least squares soft-detector for use in a wireless LAN compatible MIMO system.

Abstract translation: 一种用于增强WLAN的数据速率的系统和方法。 通过部署MIMO系统，SISO型系统通常预期的数据速率可以增加一倍。 然而，本发明的MIMO系统可以保持向后兼容于由典型的SISO类型系统实现的常规WLAN标准。 特别地，本发明的MIMO分组的分组前导码与传统的SISO系统相似，以便与传统的SISO接收机向后兼容。 此外，MIMO系统的数据模型可以被配置为支持本发明的MIMO分组中的符号的检测。 重要的是，本发明可以包括用于在无线LAN兼容MIMO系统中使用的最小二乘软件检测器。

公开(公告)号：US20060182207A1

公开(公告)日：2006-08-17

申请号：US11056745

申请日：2005-02-11

Applicant: In-Kyu Lee ,  Bong-Dae Choi ,  Chang-Kyung Sung

Inventor： In-Kyu Lee ,  Bong-Dae Choi ,  Chang-Kyung Sung

IPC: H04B7/10 ,  H04K1/10

CPC classification number: H04L1/0643 ,  H04B7/0669 ,  H04L1/0656

Abstract: A receiver for a hybrid space time block codes (STBC) scheme using a nonlinear decision feedback (DFB) filter instead of a conventional linear filter which are used in the hybrid STBC scheme, that is, a combination of a spatial division multiplexing (SDM) scheme and a STBC scheme. In the receiver used for the STBC scheme, a previous-stage remaining signal is detected by using a well-known BLAST algorithm, and inter-symbol interference (ISI) is minimized by applying the previous-stage remaining signal to a current-stage signal, providing improved performance. The receiver used for the STBC scheme can be applied to a time varying channel fading environment as well as a quasi-static channel environment. According to the hybrid STBC scheme, a gain of about 3 dB can be obtained in channel environments having a frame error rate (FER) frequency efficiency of 2 and 3 Bps/Hz in the same condition by using a simulation.

Abstract translation: 一种使用非线性判决反馈（DFB）滤波器而不是在混合STBC方案中使用的常规线性滤波器的混合空间时间块码（STBC）方案的接收机，即空分多路复用（SDM） 计划和STBC计划。 在用于STBC方案的接收机中，通过使用公知的BLAST算法检测前一级剩余信号，并且通过将前一级剩余信号应用于当前级信号来最小化符号间干扰（ISI） ，提供改进的性能。 用于STBC方案的接收机可以应用于时变信道衰落环境以及准静态信道环境。 根据混合STBC方案，通过使用模拟，可以在相同条件下具有2和3Bps / Hz的帧错误率（FER）频率效率的信道环境中获得约3dB的增益。

公开(公告)号：US07058086B2

公开(公告)日：2006-06-06

申请号：US09849237

申请日：2001-05-07

Applicant: Paul D. Marko

Inventor： Paul D. Marko

IPC: H04B7/02 ,  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. One or more encoded data streams are interleaved and transmitted on one or more 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 the transmission channels using a minimum number of subsets. Multiple combinations of subsets can be received via two or more transmission channels to reconstruct the source data stream following blockage of one channel. Decoding is performed via a Viterbi decoder.

公开(公告)号：US06999472B2

公开(公告)日：2006-02-14

申请号：US09870260

申请日：2001-05-30

Applicant: Jyri Hamalainen ,  Risto Wichman

Inventor： Jyri Hamalainen ,  Risto Wichman

IPC: H04J3/16 ,  H04J3/22 ,  H04B7/02 ,  H04L1/02 ,  H04L23/02 ,  H04L5/12

CPC classification number: H04L1/0045 ,  H04B7/0669 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/0059 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/0656

Abstract: Apparatus, and an associated method, for space-time encoding data to be communicated upon a communication channel susceptible to fading. Multi-rate data services can be effectuated through appropriate selection of the code rate by which data is encoded. And, the coding of space-time encoded data is facilitated as different permutations of coded data symbols are separate transmitted upon separate communication paths.

公开(公告)号：US20060019709A1

公开(公告)日：2006-01-26

申请号：US10520694

申请日：2003-07-10

Applicant: Sung-Jin Kim ,  Ki- Ho Kim ,  Chang-Soon Park ,  Kwang-Bok Lee

Inventor： Sung-Jin Kim ,  Ki- Ho Kim ,  Chang-Soon Park ,  Kwang-Bok Lee

IPC: H04M1/00

CPC classification number: H04L1/0006 ,  H04B7/0634 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0016 ,  H04L1/0656 ,  H04L1/1812

Abstract: A mobile communication apparatus including a base station and at least two mobile stations, having multiple antennas, respectively is provided. In the mobile communication apparatus, the base station restores from feedback signals transmitted from the mobile stations weight information determined in the mobile stations, generates from the restored weight information downlink control information ensuring maximum throughput to each of the mobile stations, and selects from among data of all of the mobile stations data of a desired mobile station(s) to be transmitted, based on the downlink control information. Each of each of the mobile stations has at least one mobile station antenna, the base station has at least two base station antennas, and the downlink control information includes mobile station selection information, an optimal basis matrix index, and optimal gain indices. As a result, nominal peak throughput in multi-antenna mobile communications can be efficiently achieved at low costs.

Abstract translation: 提供了分别具有多个天线的基站和至少两个移动台的移动通信装置。 在移动通信装置中，基站从移动台发送的反馈信号中恢复加权信息，从恢复的加权信息生成确保每个移动台的最大吞吐量的下行链路控制信息，并从数据中进行选择 基于下行链路控制信息，要发送的所需移动台的所有移动站数据的数据。 每个移动台具有至少一个移动台天线，基站具有至少两个基站天线，并且下行链路控制信息包括移动台选择信息，最优基矩阵索引和最优增益索引。 因此，可以以低成本有效地实现多天线移动通信中的标称峰值吞吐量。

公开(公告)号：US20050265475A1

公开(公告)日：2005-12-01

申请号：US11109663

申请日：2005-04-20

Applicant: Yong Sun ,  Hwa Tan

Inventor： Yong Sun ,  Hwa Tan

IPC: H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04L1/00 ,  H04L1/06 ,  H04L27/04 ,  H03D1/00 ,  H04L1/02

CPC classification number: H04L1/0668 ,  H04B7/04 ,  H04B7/0697 ,  H04L1/0625 ,  H04L1/0631 ,  H04L1/0656 ,  H04L2001/0098

Abstract: A communications system, comprising a transmitter and a receiver, are operable to communicate information using a spatial multiplexing method. The transmitter is operable to separate data to be transmitted into two categories, Alamouti encoding the symbols of the first category and transmitting them on an even number of antennae, and not encoding the second category of symbols, but merely using a modulation scheme such as QAM, and transmitting them on one or more further antennae. A corresponding receiver is operable to successively detect signal components received on corresponding spatially displaced antennae, and then to determine an estimated channel response from the signal components. A weighting function is then derived to extract a stream of data from the received signal, which, on the basis that the Alamouti STBC encoded signal will have the highest signal to noise ratio, will normally be the latter, while other data not encoded according to Alamouti is detected thereafter.

Abstract translation: 包括发射机和接收机的通信系统可操作以使用空间复用方法来传送信息。 发射机可操作以将要发送的数据分离成两类，Alamouti编码第一类别的符号并在偶数天线上发送它们，并且不对第二类别的符号进行编码，而仅使用诸如QAM的调制方案 ，并在一个或多个另外的天线上发送它们。 相应的接收机可操作地连续地检测在对应的空间位移天线上接收的信号分量，然后确定来自信号分量的估计信道响应。 然后导出加权函数以从接收信号中提取数据流，其基于Alamouti STBC编码信号将具有最高的信噪比，通常将是后者，而其他数据不是根据 此后检测到Alamouti。

公开(公告)号：US20050220065A1

公开(公告)日：2005-10-06

申请号：US11097012

申请日：2005-03-31

Applicant: Bong-Hoe Kim ,  Dong-Youn Seo ,  Dong-Hee Shim

Inventor： Bong-Hoe Kim ,  Dong-Youn Seo ,  Dong-Hee Shim

IPC: H04B1/69 ,  H04B7/00 ,  H04B7/04 ,  H04B7/06

CPC classification number: H04L1/0656 ,  H04B7/04 ,  H04B7/0669 ,  H04B7/0697 ,  H04L1/0026 ,  H04L1/1812

Abstract: Provided is a method for transmitting a data signal in a multiple-input multiple-output mobile communication system for transmitting and receiving the data signal by using a plurality of transmitting antennas and a plurality of receiving antennas, wherein when each data transmitted through the plurality of transmitting antennas is transmitted with respectively different control signals, the control signals are transmitted respectively through downlink control signal transport channels as many as the number of control signals. According to this, when information with respect to modulation methods and OVSF codes for each transmitting antenna in the MIMO system is different, it is possible to achieve efficient transmission and reception by using a method for transmitting the different information to a terminal. Furthermore, a backward compatibility between the MIMO system and the related art HSDPA system can be satisfied by using control channels similar to the control channels used in the related art HSDPA system, and the method can be unlimitedly applied to any case data is composed of one packet or of several packets.

Abstract translation: 提供了一种用于在多输入多输出移动通信系统中发送数据信号的方法，用于通过使用多个发送天线和多个接收天线来发送和接收数据信号，其中当通过多个 发送天线分别用不同的控制信号发送，控制信号分别通过与控制信号数量一样多的下行链路控制信号传输信道发送。 据此，当MIMO系统中的每个发送天线的调制方式和OVSF码的信息不同时，可以通过使用向终端发送不同信息的方法来实现有效的发送和接收。 此外，可以通过使用与现有技术HSDPA系统中使用的控制信道相似的控制信道来满足MIMO系统和现有技术HSDPA系统之间的向后兼容性，并且该方法可以无限地应用于由一个 数据包或几个数据包。