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    • 6. 发明申请
    • DATA TRANSMISSION WITH SPATIAL SPREADING IN A MIMO COMMUNICATION SYSTEM
    • 数据传输与MIMO通信系统中的空间传播
    • US20070211814A1
    • 2007-09-13
    • US11683736
    • 2007-03-08
    • Jay WaltonJohn KetchumMark WallaceSteven Howard
    • Jay WaltonJohn KetchumMark WallaceSteven Howard
    • H04L1/02
    • H04B7/0417H04B7/0626H04B7/0678H04L1/0002H04L1/0003H04L1/0009H04L5/0023H04L25/0224
    • For data transmission with spatial spreading, a transmitting entity (1) encodes and modulates each data packet to obtain a corresponding data symbol block, (2) multiplexes data symbol blocks onto NS data symbol streams for transmission on NS transmission channels of a MIMO channel, (3) spatially spreads the NS data symbol streams with steering matrices, and (4) spatially processes NS spread symbol streams for full-CSI transmission on NS eigenmodes or partial-CSI transmission on NS spatial channels of the MIMO channel. A receiving entity (1) obtains NR received symbol streams via NR receive antennas, (2) performs receiver spatial processing for full-CSI or partial-CSI transmission to obtain NS detected symbol streams, (3) spatially despreads the NS detected symbol streams with the same steering matrices used by the transmitting entity to obtain NS recovered symbol streams, and (4) demodulates and decodes each recovered symbol block to obtain a corresponding decoded data packet.
    • 对于具有空间扩展的数据传输,发送实体(1)对每个数据分组进行编码和调制,以获得相应的数据符号块,(2)将数据符号块复用到N个S / S数据符号流上以便传输 (3)用导向矩阵空间扩展N S S个数据符号流,并且(4)空间地处理N S S个数据符号流, / SUB>扩展符号流,用于N信道本征模式上的全CSI传输或MIMO信道的N SUB空间信道上的部分CSI传输。 接收实体(1)通过N个N个接收天线获得接收到的N N个符号流,(2)执行用于全CSI或部分CSI传输的接收机空间处理,以获得 (3)使用发送实体使用的相同导向矩阵空间地解扩N N S S个检测到的符号流,以获得N N个S< S< S< (4)对每个恢复的符号块进行解调和解码以获得对应的解码数据分组。
    • 8. 发明申请
    • Unified MIMO transmission and reception
    • 统一的MIMO传输和接收
    • US20060013250A1
    • 2006-01-19
    • US10892732
    • 2004-07-15
    • Steven HowardJay WaltonMark Wallace
    • Steven HowardJay WaltonMark Wallace
    • H04Q7/24
    • H04B7/0413H04B7/0417H04B7/0421H04B7/0617H04L1/0026
    • A “unified” MIMO system that supports multiple operating modes for efficient data transmission is described. Each operating mode is associated with different spatial processing at a transmitting entity. For example, four operating modes may be defined for (1) full-CSI or partial-CSI transmission and (2) with or without steering transmit diversity (STD). An appropriate operating mode may be selected for use based on various factors (e.g., availability of a good channel estimate). With steering transmit diversity, data is spatially spread and transmitted on multiple spatial channels, and a single rate may then be used for all spatial channels used for data transmission. A receiving entity may utilize a minimum mean square error (MMSE) technique for all operating modes. The receiving entity may derive a spatial filter matrix and perform receiver spatial processing in the same manner for all operating modes, albeit with different effective channel response matrices.
    • 描述了支持多种操作模式以实现有效数据传输的“统一”MIMO系统。 每个操作模式与发送实体处的不同空间处理相关联。 例如,可以为(1)全CSI或部分CSI传输定义四种操作模式,以及(2)具有或不具有导向发射分集(STD)的操作模式。 可以基于各种因素(例如,良好信道估计的可用性)来选择适当的操作模式来使用。 利用转向发射分集,数据在空间上扩展并在多个空间信道上传输,然后可以将单个速率用于用于数据传输的所有空间信道。 接收实体可以针对所有操作模式使用最小均方误差(MMSE)技术。 接收实体可以导出空间滤波器矩阵并且以相同的方式对所有操作模式执行接收机空间处理,尽管具有不同的有效信道响应矩阵。
    • 10. 发明申请
    • Transmit diversity and spatial spreading for an OFDM-based multi-antenna communication system
    • 基于OFDM的多天线通信系统的发射分集和空间扩展
    • US20050195733A1
    • 2005-09-08
    • US10794918
    • 2004-03-05
    • J. WaltonJohn KetchumMark WallaceSteven HowardSanjiv Nanda
    • J. WaltonJohn KetchumMark WallaceSteven HowardSanjiv Nanda
    • H04J99/00H04B7/04H04B7/06H04L27/26H04J11/00
    • H04B7/0615H04B7/0413H04L27/2602
    • A multi-antenna transmitting entity transmits data to a single- or multi-antenna receiving entity using (1) a steered mode to direct the data transmission toward the receiving entity or (2) a pseudo-random transmit steering (PRTS) mode to randomize the effective channels observed by the data transmission across the subbands. The PRTS mode may be used to achieve transmit diversity or spatial spreading. For transmit diversity, the transmitting entity uses different pseudo-random steering vectors across the subbands but the same steering vector across a packet for each subband. The receiving entity does not need to have knowledge of the pseudo-random steering vectors or perform any special processing. For spatial spreading, the transmitting entity uses different pseudo-random steering vectors across the subbands and different steering vectors across the packet for each subband. Only the transmitting and receiving entities know the steering vectors used for data transmission.
    • 多天线发射实体使用(1)向接收实体指导数据传输的导向模式或(2)伪随机发射转向(PRTS)模式来将数据发送到单天线或多天线接收实体,以随机化 通过子带上的数据传输观察到的有效信道。 PRTS模式可以用于实现发射分集或空间扩展。 对于发射分集,发射实体在子带上使用不同的伪随机导引向量,但是在每个子带的分组上使用相同的导向向量。 接收实体不需要具有伪随机导引向量的知识或执行任何特殊处理。 对于空间扩展,发射实体在子带上使用不同的伪随机导引向量,并且跨每个子带的分组使用不同的导向矢量。 只有发送和接收实体知道用于数据传输的导向向量。