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    • 5. 发明申请
    • Fiber aided wireless network architecture
    • 光纤辅助无线网络架构
    • US20080080868A1
    • 2008-04-03
    • US11540975
    • 2006-09-29
    • Siddharth RayMuriel MedardLizhong Zheng
    • Siddharth RayMuriel MedardLizhong Zheng
    • H04B10/00
    • H04B10/25754
    • A FAWNA that allows high-speed mobile connectivity by leveraging the speed of optical networks. Specifically, SIMO FAWNA, which comprises a SIMO wireless channel interfaced with a fiber channel through wireless-to-optical interfaces. Received wireless signal at each interface are sampled and quantized prior to transmission. The capacity of the FAWNA approaches the capacity of the architecture exponentially with fiber capacity. It is also shown that for a given fiber capacity, there is an optimal method of operating wireless bandwidth and number of interfaces. An optimal method to divide the fiber capacity among the interfaces is shown, which ensures that each interface is allocated a rate so that noise is dominated by front end noise rather than by quantization distortion. A method is also presented in which, rather than dynamically changing rate allocation based on channel state, a less complex, fixed rate allocation may be adopted with very small loss in performance.
    • FAWNA通过利用光网络的速度来实现高速移动连接。 具体来说,SIMO FAWNA包括通过无线到光学接口与光纤通道接口的SIMO无线信道。 在每个接口处的接收到的无线信号在传输之前被采样和量化。 FAWNA的容量以光纤容量指数地接近架构容量。 还表明,对于给定的光纤容量,存在操作无线带宽和接口数量的最佳方法。 示出了在接口之间划分光纤容量的最佳方法,其确保每个接口被分配速率,使得噪声以前端噪声为主,而不是通过量化失真。 还提出了一种方法,其中,不是基于信道状态动态地改变速率分配,而是可以采用较不复杂的固定速率分配,而性能损失非常小。
    • 6. 发明授权
    • Spatial spreading in a multi-antenna communication system
    • 多天线通信系统中的空间扩展
    • US08903016B2
    • 2014-12-02
    • US13526160
    • 2012-06-18
    • Jay Rodney WaltonLizhong ZhengJohn W. KetchumMark S. WallaceSteven J. Howard
    • Jay Rodney WaltonLizhong ZhengJohn W. KetchumMark S. WallaceSteven J. Howard
    • H04L27/26H04B7/02H04B7/06H04L1/06H04B7/04
    • H04B7/0417H04B7/0456H04B7/0669H04B17/336H04L1/06
    • Spatial spreading is performed in a multi-antenna system to randomize an “effective” channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system, at a transmitting entity, data is processed (e.g., encoded, interleaved, and modulated) to obtain ND data symbol blocks to be transmitted in NM transmission spans, where ND≧1 and NM>1. The ND blocks are partitioned into NM data symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices, where L>1) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and transmitted via NT transmit antennas in one transmission span. The ND data symbol blocks are thus spatially processed with NM steering matrices and observe an ensemble of channels.
    • 在多天线系统中执行空间扩展,以随机化接收实体针对每个发送的数据符号块观察到的“有效”信道。 对于MIMO系统,在发送实体处理(例如,编码,交织和调制)数据,以获得将以NM≥1和NM> 1的NM传输跨度发送的ND数据符号块。 ND块被划分为NM数据符号子块,每个传输跨度的一个子块。 对于每个子块,选择导向矩阵(例如,以确定性或伪随机方式从一组L个导引矩阵中,其中L> 1)。 每个数据符号子块用为该子块选择的导引矩阵进行空间处理,以获得在一个传输范围内经由NT个发射天线进一步处理和传输的发射符号。 因此,ND数据符号块用NM导引矩阵进行空间处理,并观察信道的集合。
    • 10. 发明申请
    • Spatial spreading in a multi-antenna communication system
    • 多天线通信系统中的空间扩展
    • US20050175115A1
    • 2005-08-11
    • US11008865
    • 2004-12-09
    • Jay WaltonLizhong ZhengJohn KetchumMark WallaceSteven Howard
    • Jay WaltonLizhong ZhengJohn KetchumMark WallaceSteven Howard
    • H04J99/00H04L1/06H04L1/02
    • H04B7/0417H04B7/0456H04B7/0669H04B17/336H04L1/06
    • Spatial spreading is performed in a multi-antenna system to randomize an “effective” channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system, at a transmitting entity, data is processed (e.g., encoded, interleaved, and modulated) to obtain ND data symbol blocks to be transmitted in NM transmission spans, where ND≧1 and NM>1. The ND blocks are partitioned into NM data symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices, where L>1) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and transmitted via NT transmit antennas in one transmission span. The ND data symbol blocks are thus spatially processed with NM steering matrices and observe an ensemble of channels.
    • 在多天线系统中执行空间扩展,以随机化接收实体针对每个发送的数据符号块观察到的“有效”信道。 对于MIMO系统,在发送实体处理(例如,编码,交织和调制)数据以获得N N个数据符号块,以在N M M中发送。 传输范围,其中N = 1和N M M 1。 N N个块被划分为N个M个数据符号子块,每个传输跨度的一个子块。 对于每个子块,选择导向矩阵(例如,以确定性或伪随机方式从一组L个导引矩阵中,其中L> 1)。 利用为该子块选择的导引矩阵来对每个数据符号子块进行空间处理,以获得在一个传输跨度中通过N T个发射天线进一步处理和传输的发射符号。 N N个数据符号块因此用N M M导引矩阵进行空间处理并观察信道的整体。