公开(公告)号：US20080095268A1

公开(公告)日：2008-04-24

申请号：US11873626

申请日：2007-10-17

Applicant: Carlos Aldana

Inventor： Carlos Aldana

IPC: H04L27/00

CPC classification number: H04L25/0226 ,  H04B7/0691 ,  H04L1/0656

Abstract: Aspects of a method and system for choice of a steering matrix (Q) for sounding in antenna selection are presented. Aspects of the system may include a transmitting station that enables determination of values for a plurality of matrix elements, which are represented in a steering matrix (Q). The contents of the steering matrix may be determined based on the contents of a plurality of protocol data units (PDU). Each of the PDUs may comprise a sounding frame. One or more space-time signals may be generated based on the plurality of PDUs. One or more transmit chain signals may be generated by multiplying a vector representation, which comprises the one or more space-time signals, by the steering matrix. One or more transmit chain signals may be transmitted via transmitting antennas selected from a plurality of transmitting antennas.

Abstract translation: 提出了用于选择天线选择中的探测的导向矩阵（Q）的方法和系统的方面。 系统的方面可以包括能够确定在导引矩阵（Q）中表示的多个矩阵元素的值的发送站。 可以基于多个协议数据单元（PDU）的内容来确定导向矩阵的内容。 每个PDU可以包括探测帧。 可以基于多个PDU来生成一个或多个空时信号。 一个或多个发射链信号可以通过乘以由导引矩阵乘以包括一个或多个空时信号的矢量表示来产生。 可以经由从多个发送天线中选择的发送天线来发送一个或多个发送链信号。

公开(公告)号：US20080089446A1

公开(公告)日：2008-04-17

申请号：US11871598

申请日：2007-10-12

Applicant: Joo-Hyun LEE ,  Sang-Boh YUN ,  Young-Hoon KWON ,  Sung-Soo HWANG ,  Jong-In KIM ,  Hyun-Cheol PARK ,  Hyoun-Kuk KIM ,  Ki-Hwan JEON

Inventor： Joo-Hyun LEE ,  Sang-Boh YUN ,  Young-Hoon KWON ,  Sung-Soo HWANG ,  Jong-In KIM ,  Hyun-Cheol PARK ,  Hyoun-Kuk KIM ,  Ki-Hwan JEON

IPC: H04B1/16

CPC classification number: H04L1/0045 ,  H04L1/0656

Abstract: A method and apparatus for detecting a signal in a communication system using at least two transmit antennas are provided. The signal detection method and apparatus includes selecting a symbol corresponding to a lowest branch metric from among symbols, the number of which corresponds to a modulation scheme, determining a candidate symbol by extending a process of selecting a symbol corresponding to a lowest branch metric from among the selected symbols, to a number which is less by one than the number of the transmit antennas, setting an accumulated branch metric of the candidate symbol as a threshold, removing a symbol having an accumulated branch metric higher than the threshold, and selecting, as a last received symbol, a symbol corresponding to a path having the lowest accumulated branch metric among paths selected without being removed until a last stage.

Abstract translation: 提供了一种使用至少两个发射天线来检测通信系统中的信号的方法和装置。 信号检测方法和装置包括从符号中选择与最低分支度量相对应的符号，其数量对应于调制方案，通过扩展选择对应于最低分支度量的符号的处理来确定候选符号， 将所选择的符号设置为比发送天线的数量小一个的数字，将候选符号的累积分支度量设置为阈值，去除具有高于阈值的累积分支度量的符号，并且选择为 最后接收的符号，对应于在所选择的路径中具有最低累积分支度量的路径的符号，而不被去除直到最后阶段。

公开(公告)号：US07356089B2

公开(公告)日：2008-04-08

申请号：US10655012

申请日：2003-09-05

Applicant: Ming Jia ,  Peiying Zhu ,  Wen Tong ,  Christian Dubuc

Inventor： Ming Jia ,  Peiying Zhu ,  Wen Tong ,  Christian Dubuc

IPC: H04B7/02 ,  H04L27/10 ,  H04L23/02

CPC classification number: H04B7/0417 ,  H04B7/0682 ,  H04B7/10 ,  H04L1/0025 ,  H04L1/0612 ,  H04L1/0625 ,  H04L1/0656 ,  H04L25/0206 ,  H04L27/2602

Abstract: A rotation by a phase offset is applied to symbols to be transmitted by one antenna relative to symbols to be transmitted from another antenna in a wireless communication system employing multi-element antennas at the transmitter. Such a phase offset allows the functionality of a MIMO system to be maintained when a MIMO channel degenerates. Advantageously, a MIMO system using the new signal design may provide a level of performance in a rich-scattering environment that is equivalent to a MIMO system using a known signal design. Furthermore, a MIMO system employing embodiments of the present invention may show significantly improvements in robustness over conventional MIMO systems.

Abstract translation: 通过相位偏移的旋转被应用于将由一个天线相对于在发射机处采用多元天线的无线通信系统中的另一个天线发送的符号要发送的符号。 当MIMO信道退化时，这种相位偏移允许维持MIMO系统的功能。 有利地，使用新信号设计的MIMO系统可以在丰富散射环境中提供等效于使用已知信号设计的MIMO系统的性能水平。 此外，采用本发明的实施例的MIMO系统可以显示出超常的MIMO系统的鲁棒性的显着改进。

公开(公告)号：US07321564B2

公开(公告)日：2008-01-22

申请号：US10765009

申请日：2004-01-26

Applicant: Muhammad Zubair Ikram ,  Srinath Hosur ,  Michael O. Polley ,  Manish Goel

Inventor： Muhammad Zubair Ikram ,  Srinath Hosur ,  Michael O. Polley ,  Manish Goel

IPC: H04J1/16

CPC classification number: H04B7/02 ,  H04B1/7105 ,  H04B1/7107 ,  H04L1/0631 ,  H04L1/0656 ,  H04L27/2647

Abstract: A Hybrid IMMSE-LMMSE receiver processing technique predicts performance of and selects between iterative and non-iterative decoding of symbols based on an intelligent metric. Based on a pre-specified criterion, the receiver determines if a correct first-stage decision is made or not. If a correct decision is made, then it follows iterative processing like in BLAST. Alternatively, if a wrong decision is found to have occurred, the receiver resorts to LMMSE estimation processing.

Abstract translation: 混合IMMSE-LMMSE接收机处理技术基于智能度量预测符号的迭代和非迭代解码之间的性能并进行选择。 根据预先指定的标准，接收机确定是否做出正确的第一阶段决定。 如果做出正确的决定，那么它将像BLAST一样进行迭代处理。 或者，如果发现错误的决定已经发生，接收机将采用LMMSE估计处理。

公开(公告)号：US20070280336A1

公开(公告)日：2007-12-06

申请号：US10590671

申请日：2005-02-23

Applicant: Jianzhong Zhang ,  Balaji Raghothaman ,  Giridhar Mandyam

Inventor： Jianzhong Zhang ,  Balaji Raghothaman ,  Giridhar Mandyam

IPC: H04Q7/00

CPC classification number: H04L25/03292 ,  H04L1/0631 ,  H04L1/0656

Abstract: A system according to embodiments of this invention provide a multiple transmit antenna (117-1 . . . M), multiple receive antenna (121-1 . . . N) (MIMO) receiver (125) design for the communication downlinks such as those used in CDMA technology. Two algorithms referred to as the MIMO LMMSE-FFT and MIMO LMMSE-SIC (Successive Interference Cancellation) algorithms, are described in detail. In embodiments of the invention, the interference cancellation step is achieved without the impractical assumption of the knowledge of all the active Walsh codes in the systems, unlike many other interference cancellation based algorithms found in the literature.

Abstract translation: 根据本发明的实施例的系统提供用于诸如那些通信下行链路的多个发射天线（117-1M），多个接收天线（121-1.1）（MIMO）接收机（125）设计 用于CDMA技术。 被称为MIMO LMMSE-FFT和MIMO LMMSE-SIC（连续干扰消除）算法的两种算法被详细描述。 在本发明的实施例中，与在文献中发现的许多其他基于干扰消除的算法不同，实现干扰消除步骤，而不需要系统中所有活动沃尔什码的知识的不切实际的假设。

公开(公告)号：US20070263569A1

公开(公告)日：2007-11-15

申请号：US11746459

申请日：2007-05-09

Applicant: Soong-Yoon CHOI ,  Kyung-Joo Suh ,  Young-Hoon Kwon ,  Sung-Soo Hwang ,  Jong-In Kim ,  Yong-Seok Kim ,  Hyun-Cheol Park ,  Hyoun-Kuk Kim

Inventor： Soong-Yoon CHOI ,  Kyung-Joo Suh ,  Young-Hoon Kwon ,  Sung-Soo Hwang ,  Jong-In Kim ,  Yong-Seok Kim ,  Hyun-Cheol Park ,  Hyoun-Kuk Kim

IPC: H04Q7/00

CPC classification number: H04B7/0851 ,  H04L1/0656 ,  H04L5/0046 ,  H04L5/0053 ,  H04L5/1453

Abstract: An apparatus and method for lowering a tree searching complexity in a Spatial Multiplexing (SM) Multiple Input Multiple Output (MIMO) antenna system are provided. A transmitting apparatus includes a generator for generating a plurality of transmit streams by spatial-multiplexing a transmit data, a determiner for determining modulation schemes to be applied to the plurality of the transmit streams respectively and a modulator for modulating the plurality of the transmit streams using at least two modulation schemes under control of the determiner. The receiver detects the signals by allocating the modulation scheme of the lowest order to the upper tree level.

Abstract translation: 提供了一种用于降低空间复用（MIMO）多输入多输出（MIMO）天线系统中的树搜索复杂度的装置和方法。 发送装置包括：发生器，用于通过空间复用发送数据来产生多个发送流;确定器，用于确定分别应用于多个发送流的调制方案;以及调制器，用于使用 在确定器的控制下的至少两个调制方案。 接收机通过将最低阶的调制方案分配给上层树来检测信号。

公开(公告)号：US20070243903A1

公开(公告)日：2007-10-18

申请号：US11576248

申请日：2005-10-25

Applicant: Bin Ihm ,  Yong Jin ,  Jin Chun

Inventor： Bin Ihm ,  Yong Jin ,  Jin Chun

IPC: H04M1/00

CPC classification number: H04L1/1893 ,  H04L1/0025 ,  H04L1/0631 ,  H04L1/0643 ,  H04L1/0656 ,  H04L1/0668 ,  H04L1/0693 ,  H04L1/1671 ,  H04L1/18 ,  H04L1/1864 ,  H04L1/1896

Abstract: A method of retransmitting a data packet in a wireless communication system having multiple antennas is disclosed. More specifically, a mobile station (MS) determines a retransmission format from a plurality of retransmission formats and then informs the determined retransmission format by which to retransmit the data packet. A 1 = [ S ~ 1 - S ~ 2 0   0 S ~ 2   S ~ 1 S ~ 3 - S ~ 4 0   0 S ~ 4   S ~ 5 ] A 2 = [ S ~ 1 - S ~ 2 S ~ 3 -   S ~ 4 S ~ 2   S ~ 1 0   0 0   0 S ~ 4   S ~ 5 ] A 3 = [ S ~ 1 - S ~ 2 0   0 S ~ 2   S ~ 1 S ~ 3 - S ~ 4 S ~ 2   S ~ 1 S ~ 4   S ~ 5 ]

公开(公告)号：US20070165104A1

公开(公告)日：2007-07-19

申请号：US11554726

申请日：2006-10-31

Applicant: Farooq Khan ,  Cornelius Rensburg ,  Jin-Kyu Han

Inventor： Farooq Khan ,  Cornelius Rensburg ,  Jin-Kyu Han

IPC: H04B1/00

CPC classification number: H04L27/2602 ,  H04B7/022 ,  H04B7/0669 ,  H04B7/0697 ,  H04H20/30 ,  H04H20/67 ,  H04L1/0061 ,  H04L1/0066 ,  H04L1/007 ,  H04L1/0625 ,  H04L1/0656 ,  H04L5/0023 ,  H04L5/0046 ,  H04L5/0048 ,  H04L5/006 ,  H04L2001/0098

Abstract: A wireless communication system is disclosed wherein an information source communicates with a mobile station via multiple intermediary base stations located in respective cells of a broadcast zone. In one embodiment, each base station sends multiple information streams that may be received by a mobile station located in the broadcast zone. By receiving multiple information streams from multiple base stations, the mobile station may enhance reception. In one embodiment, a base station transmits an information stream that includes a base layer and another information stream including an enhanced layer. If a receiver in a mobile station receives an enhanced layer with more than a predetermined amount of quality, then the receiver uses information in the received enhanced layer to supplement information in the received base layer.

Abstract translation: 公开了一种无线通信系统，其中信息源通过位于广播区域的相应小区中的多个中间基站与移动台进行通信。 在一个实施例中，每个基站发送可以由位于广播区域中的移动台接收的多个信息流。 通过从多个基站接收多个信息流，移动台可以增强接收。 在一个实施例中，基站发送包括基本层和包括增强层的另一个信息流的信息流。 如果移动站中的接收机接收到具有超过预定量的质量的增强层，则接收机使用所接收的增强层中的信息来补充所接收的基本层中的信息。

公开(公告)号：US20070105503A1

公开(公告)日：2007-05-10

申请号：US11508386

申请日：2006-08-22

Applicant: Byoung-Hoon Kim

Inventor： Byoung-Hoon Kim

IPC: H04B7/00 ,  H04B1/00

CPC classification number: H04B7/0417 ,  H04B7/04 ,  H04B7/0632 ,  H04L1/0026 ,  H04L1/06 ,  H04L1/0656 ,  H04L1/0675

Abstract: Systems and methods for improving the performance of a MIMO wireless communication system by reducing the amount of uplink resources that are needed to provide channel performance feedback for the adjustment of data rates on the downlink MIMO channels. In one embodiment, a method comprises encoding each of a set of data streams according to corresponding data rates, permuting the data streams on a set of MIMO channels according to a full permutation of combinations, transmitting the permuted data streams, receiving the permuted data streams, decoding and determining an SNR for each of the data streams, computing a condensed SNR metric for the set of data streams, providing the condensed metric as feedback, determining a set of individual SNR metrics for the data streams based on the condensed SNR metric, and adjusting the data rates at which the data streams are encoded based on the individual SNR metrics.

Abstract translation: 通过减少为在下行链路MIMO信道上调整数据速率而提供信道性能反馈所需的上行链路资源的量来改善MIMO无线通信系统的性能的系统和方法。 在一个实施例中，一种方法包括根据对应的数据速率对一组数据流中的每一个进行编码，根据组合的全部排列来置换一组MIMO信道上的数据流，发送置换的数据流，接收置换的数据流 解码和确定每个数据流的SNR，计算所述数据流集合的精简SNR度量，提供所述精简度量作为反馈，基于所述精简SNR度量确定所述数据流的各个SNR度量的集合， 以及基于各个SNR度量来调整数据流被编码的数据速率。

公开(公告)号：US20070064830A1

公开(公告)日：2007-03-22

申请号：US11523278

申请日：2006-09-18

Applicant: Soong-Yoon Choi ,  Gun-Chul Hwang ,  Chan-Byoung Chae ,  Seung-Hoon Nam

Inventor： Soong-Yoon Choi ,  Gun-Chul Hwang ,  Chan-Byoung Chae ,  Seung-Hoon Nam

IPC: H04L1/02

CPC classification number: H04L1/0656 ,  H04B7/063 ,  H04B7/0634 ,  H04B7/0689 ,  H04L25/0206 ,  H04L25/0224 ,  H04L27/2608

Abstract: An apparatus and method for simultaneously providing service to users each having a different number of antennas in a multiple-antenna wireless communication system are provided. The communication method discloses a BS in a wireless communication system that services a first multiple antenna mode using X transmit antennas and a second multiple antenna mode using Y transmit antennas such that (Y>X), the BS determines an MS to be serviced in the second multiple antenna mode and receives a sounding signal from the MS. The BS estimates an uplink channel using the received sounding signal and acquires downlink channel values using estimated uplink channel values. Then the BS services the MS in the second multiple antenna mode using the downlink channel values.

Abstract translation: 提供了一种用于在多天线无线通信系统中同时向具有不同天数的用户提供服务的装置和方法。 该通信方法公开了使用X个发射天线来服务第一多天线模式的无线通信系统中的BS，以及使用Y个发射天线的第二多天线模式，使得（Y> X），BS确定要在 第二多天线模式并从MS接收探测信号。 BS使用接收到的探测信号估计上行链路信道，并且使用估计的上行链路信道值来获取下行链路信道值。 然后BS使用下行链路信道值在第二多天线模式中服务于MS。