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23 条记录 (耗时 0.023 秒)

    Iterative channel estimation
    1.
    发明授权
    Iterative channel estimation 有权
    迭代信道估计

    公开(公告)号：US06459728B1

    公开(公告)日：2002-10-01

    申请号：US09302764

    申请日：1999-04-30

    申请人： Israel Bar-David ,  Carlo Luschi ,  Ran-Hong Yan

    发明人： Israel Bar-David ,  Carlo Luschi ,  Ran-Hong Yan

    IPC分类号： H04L2701

    CPC分类号： H04L25/0202 ,  H04L25/0212 ,  H04L25/0236

    摘要： A method and apparatus for estimating channel impulse response and data in a signal transmitted over a channel in a communication system. The channel impulse response is estimated uses correlative channel sounding, and then, using the estimated channel impulse response, the data in the signal is estimated. The output is then fed back to the channel impulse response estimator and the channel impulse estimation is repeated. The data estimation and channel impulse response estimation may be iterated a number of times.

    摘要翻译： 一种用于估计在通信系统中通过信道发送的信号中的信道脉冲响应和数据的方法和装置。 估计信道脉冲响应使用相关信道探测，然后使用估计的信道脉冲响应，估计信号中的数据。 然后将输出反馈到信道脉冲响应估计器，并重复信道脉冲估计。 数据估计和信道脉冲响应估计可以重复多次。

    Radio communication systems
    2.
    发明授权
    Radio communication systems 有权
    无线电通信系统

    公开(公告)号：US06668030B2

    公开(公告)日：2003-12-23

    申请号：US09848504

    申请日：2001-05-03

    申请人： Alexandr Kuzminskiy ,  Carlo Luschi ,  Paul Edward Strauch ,  Ran-Hong Yan

    发明人： Alexandr Kuzminskiy ,  Carlo Luschi ,  Paul Edward Strauch ,  Ran-Hong Yan

    IPC分类号： H04B110

    CPC分类号： H04L1/20 ,  H04B7/005 ,  H04L1/06 ,  H04L2025/03566 ,  H04L2025/03726

    摘要： A mobile telephone system includes a base station which establishes a link with a selected mobile station. The received signal from the mobile station will include a noise component as well as a possible interference component from another mobile station operating at the same frequency in another cell. The base station has a trellis based equalization system which operates on the assumption that the received signal includes components which have a predominantly Gaussian characteristic. A switch controller determines when the interference component (which is non-gaussian) in the received signal becomes a dominant component and operates to switch a spatio-temporal filter into the circuit instead of the trellis based equalization system, to improve the bit error rate performance.

    摘要翻译： 移动电话系统包括与所选择的移动站建立链接的基站。 来自移动台的接收信号将包括噪声分量以及来自在另一小区中以相同频率工作的另一移动站的可能干扰分量。 基站具有基于网格的均衡系统，其基于接收信号包括具有主要高斯特性的分量来运行。 开关控制器确定接收信号中的干扰分量（其是非高斯）何时成为主要分量并且操作以将时空滤波器切换到电路而不是基于网格的均衡系统，以提高误码率性能 。

    Channel estimation using soft-decision feedback
    3.
    发明授权
    Channel estimation using soft-decision feedback 有权
    使用软判决反馈的信道估计

    公开(公告)号：US06539067B1

    公开(公告)日：2003-03-25

    申请号：US09300495

    申请日：1999-04-28

    申请人： Carlo Luschi ,  Syed Aon Mujtaba ,  Magnus Sandell ,  Paul Edward Strauch ,  Ran-Hong Yan ,  Stephan ten Brink

    发明人： Carlo Luschi ,  Syed Aon Mujtaba ,  Magnus Sandell ,  Paul Edward Strauch ,  Ran-Hong Yan ,  Stephan ten Brink

    IPC分类号： H04L2706

    CPC分类号： H04L25/0202

    摘要： A method of estimating channel impulse response in a signal transmitted over a channel in a communication system is described. The channel estimator obtains a priori knowledge about the transmitted signal, and then uses the transmitted signal and the a priori knowledge to choose an estimate of channel impulse response which minimizes the expected distance between the transmitted signal and a reconstructed signal. The expected distance that is minimized is a cost function, represented by E{∥r−Bh∥2r}. By using soft decision feedback, the invention minimizes erroneous decision feedback which can cause error propagation. The decisions are usually in the form of log likelihood ratios (LLR).

    摘要翻译： 描述了在通信系统中通过信道发送的信号中估计信道脉冲响应的方法。 信道估计器获得关于发射信号的先验知识，然后使用发射信号和先验知识来选择信道脉冲响应的估计，其使发射信号和重构信号之间的预期距离最小化。 最小化的预期距离是由E {‖r-Bh‖2r}表示的成本函数。 通过使用软判决反馈，本发明使可能导致错误传播的错误判定反馈最小化。 决策通常是对数似然比（LLR）的形式。

    Frequency stable resonator with temperature compensating layers
    5.
    发明授权
    Frequency stable resonator with temperature compensating layers 失效
    具有温度补偿层的频率稳定谐振器

    公开(公告)号：US06580933B2

    公开(公告)日：2003-06-17

    申请号：US09825030

    申请日：2001-04-03

    申请人： Farhat Abbas ,  Ran-Hong Yan

    发明人： Farhat Abbas ,  Ran-Hong Yan

    IPC分类号： H01P708

    CPC分类号： H01P7/10 ,  Y10S505/70 ,  Y10S505/866

    摘要： A resonator for rf frequencies, especially microwave, in telecommunications systems, with an extremely stable resonant frequency over a desired operating temperature range, of predetermined width (Y) and thickness (X) and having a predetermined length (Z) in the direction of propagation for achieving a desired resonance, comprises a dielectric substrate of rutile, and first and second temperature compensating layers of sapphire on two opposite faces of the substrate and extending along the length of the substrate, these sapphire layers having a predetermined thickness, and first and second superconducting layers formed on the outer surfaces of the temperature compensating layers. The dielectric constant of rutile has an opposite temperature dependence to that of sapphire, and the thicknesses of the temperature compensating layers are selected such that the frequency of resonance of the resonator is maintained within a predetermined range over a predetermined temperature range, for example 1 part in 1015 over a temperature range of 1 mK0.

    摘要翻译： 在电信系统中用于频率特别是微波的谐振器，在预定宽度（Y）和厚度（X）的期望工作温度范围内具有非常稳定的谐振频率并且在传播方向上具有预定长度（Z） 为了实现期望的共振，包括金红石的电介质基底和在基底的两个相对面上的蓝宝石的第一和第二温度补偿层，并且沿着基底的长度延伸，这些蓝宝石层具有预定的厚度，第一和第二 形成在温度补偿层的外表面上的超导层。 金红石的介电常数与蓝宝石的温度依赖性相反，并且选择温度补偿层的厚度，使得共振器的谐振频率在预定温度范围内保持在预定范围内，例如1分 在1015℃，温度范围为1 mK0。

    Cellular multicarrier wireless communication system
    6.
    发明授权
    Cellular multicarrier wireless communication system 有权
    蜂窝多载波无线通信系统

    公开(公告)号：US06553011B1

    公开(公告)日：2003-04-22

    申请号：US09188026

    申请日：1998-11-06

    申请人： Ran-Hong Yan ,  Stephan ten Brink

    发明人： Ran-Hong Yan ,  Stephan ten Brink

    IPC分类号： H04B7204

    CPC分类号： H04W16/00 ,  H04L5/023

    摘要： A cellular multicarrier wireless communication system is disclosed, in which base stations for a cluster of two or more respective cells transmit the same signaling information in synchronism on the same group of subcarriers. This allows the combination of several base station signals ‘on the air’ prior to the receiver's antenna, without using any additional hardware for signal combination in the mobile terminal.

    摘要翻译： 公开了一种蜂窝式多载波无线通信系统，其中两个或多个相应小区的群集的基站在相同的子载波组上同步地发送相同的信令信息。 这允许在接收机的天线之前“空中”上的几个基站信号的组合，而不需要在移动终端中用于信号组合的任何附加硬件。

    Time-slot partitioning in a TDMA system
    7.
    发明授权
    Time-slot partitioning in a TDMA system 有权
    TDMA系统中的时隙划分

    公开(公告)号：US07362734B1

    公开(公告)日：2008-04-22

    申请号：US09980287

    申请日：2000-03-14

    申请人： Konstantinos Samaras ,  Louis Gwyn Samuel ,  Jian Jun Wu ,  Ran-Hong Yan

    发明人： Konstantinos Samaras ,  Louis Gwyn Samuel ,  Jian Jun Wu ,  Ran-Hong Yan

    IPC分类号： H04J3/00

    CPC分类号： H04B7/2643 ,  H04W72/0446

    摘要： According to the present invention there is provided a method of transmitting user data in a TDMA system in which the number of channels is increased by partitioning at least one time-slot in a TDMA frame into at least two sub-time-slots. Each sub time-slot may be allocated to a different user. User data may be transmitted in each time slot in a burst structure, user data being transmitted in each sub time-slot in a corresponding burst structure. User data may be transmitted in each time slot in a burst structure having n bits and wherein each time slot is partitioned into m sub time slots, user data being transmitted in each sub time-slot in a corresponding burst structure having n/m bits.

    摘要翻译： 根据本发明，提供了一种在TDMA系统中发送用户数据的方法，其中通过将TDMA帧中的至少一个时隙划分成至少两个子时隙来增加信道数量。 每个子时隙可以被分配给不同的用户。 可以在突发结构中的每个时隙中发送用户数据，在相应的突发结构中的每个子时隙中发送用户数据。 可以在具有n位的突发结构中的每个时隙中发送用户数据，并且其中每个时隙被划分为m个子时隙，在具有n / m位的相应突发结构中的每个子时隙中发送用户数据。

    Pre-association for CWUSB
    9.
    发明授权
    Pre-association for CWUSB 有权
    CWUSB预协会

    公开(公告)号：US07865642B2

    公开(公告)日：2011-01-04

    申请号：US12272287

    申请日：2008-11-17

    申请人： Turgut Aytur ,  Fred Battaglia ,  Saurabh Garg ,  Batuhan Okur ,  Ping-Wen Ong ,  Venkatesh Rajendran ,  Ran-Hong Yan

    发明人： Turgut Aytur ,  Fred Battaglia ,  Saurabh Garg ,  Batuhan Okur ,  Ping-Wen Ong ,  Venkatesh Rajendran ,  Ran-Hong Yan

    IPC分类号： G06F13/42 ,  G06F13/00

    CPC分类号： H04L9/0844 ,  H04L63/0869 ,  H04L2209/80 ,  H04W12/06

    摘要： Certified Wireless USB 1.0 defines two different types of association: cable association and numeric association. In order to implementation these two association methods, the CWUSB device needs to have either upstream USB connector (for cable association) or display capability (for numeric association). These extra requirements make the CWUSB device bulkier (one more USB connector) and/or more expensive (extra display components). For cheap and simple CWUSB devices, we need a simpler association method that is easy and cheap to implement. In a pre-packaged total solution, which includes a host and one or more device(s), we can use pre-association to smooth the user experience. The host and device(s) are pre-associated. When an end user starts to use this solution, they do not need to worry about the association at all.

    摘要翻译： 认证无线USB 1.0定义了两种不同类型的关联：电缆关联和数字关联。 为了实现这两种关联方法，CWUSB设备需要有上游USB连接器（用于电缆关联）或显示功能（用于数字关联）。 这些额外的要求使得CWUSB设备体积更大（一个USB连接器）和/或更昂贵的（额外的显示组件）。 对于便宜和简单的CWUSB设备，我们需要一种简单易用的关联方法来实现。 在包括主机和一个或多个设备的预先打包的整体解决方案中，我们可以使用预关联来平滑用户体验。 主机和设备是预先关联的。 最终用户开始使用这种解决方案时，他们根本不用担心关联。