TDS-OFDMAA COMMUNICATION SYSTEM UPLINK FREQUENCY SYNCHRONIZATION
    61.
    发明申请
    TDS-OFDMAA COMMUNICATION SYSTEM UPLINK FREQUENCY SYNCHRONIZATION 审中-公开
    TDS-OFDMAA通信系统上行频率同步

    公开(公告)号:US20080279294A1

    公开(公告)日:2008-11-13

    申请号:US12117002

    申请日:2008-05-08

    申请人: LIN YANG QIN LIU

    发明人: LIN YANG QIN LIU

    IPC分类号: H04J11/00 H04L27/28

    摘要: TDS-OFDM can be applied to uplink wireless communication multiple accesses through sub-channelization, which means that each user uses a portion of available bandwidth to achieve orthogonal multiple access, where the sub-carriers in each sub-band may be contiguous or distributed. Inside the bandwidth for each user, at least one random or known sequence is used as the guard interval between transmitted symbols, where the sequence is limited inside the sub-band.

    摘要翻译: TDS-OFDM可以通过子信道化应用于上行链路无线通信多次访问,这意味着每个用户使用一部分可用带宽来实现正交多址接入,其中每个子带中的子载波可以是连续的或分布的。 在每个用户的带宽内,使用至少一个随机或已知序列作为发送符号之间的保护间隔,其中序列在子带内被限制。

    METHOD AND APPARATUS FOR SYNCHRONIZATION FOR MIMO TDS-OFDM SYSTEM
    62.
    发明申请
    METHOD AND APPARATUS FOR SYNCHRONIZATION FOR MIMO TDS-OFDM SYSTEM 审中-公开
    用于MIMO TDS-OFDM系统的同步的方法和装置

    公开(公告)号:US20080225997A1

    公开(公告)日:2008-09-18

    申请号:US12048353

    申请日:2008-03-14

    申请人: Lin Yang Qin Liu

    发明人: Lin Yang Qin Liu

    IPC分类号: H04L27/06

    摘要: In a TDS-OFDM system, frequency offset estimate provided. A method for estimating a frequency offset comprising the step of correlating a known PN sequence with a received signal.

    摘要翻译: 在TDS-OFDM系统中,提供频偏估计。 一种用于估计频偏的方法,包括将已知PN序列与接收信号相关的步骤。

    METHOD AND APPARATUS FOR ADAPTIVE PN LENGTH FOR TDS-OFDM IN TRANSMISSION
    63.
    发明申请
    METHOD AND APPARATUS FOR ADAPTIVE PN LENGTH FOR TDS-OFDM IN TRANSMISSION 审中-公开
    用于TDS-OFDM传输的自适应PN长度的方法和装置

    公开(公告)号:US20080225969A1

    公开(公告)日:2008-09-18

    申请号:US12048322

    申请日:2008-03-14

    申请人: LIN YANG Qin Liu

    发明人: LIN YANG Qin Liu

    IPC分类号: H04K1/10

    CPC分类号: H04L27/2605

    摘要: In a TDS-OFDM system, a method for transmission is provided. The method comprises the step of: adjusting a PN sequence length, whereby a required performance is maintained. The adjusting step comprises increasing, decreasing, or keep unchanging the PN sequence length.

    摘要翻译: 在TDS-OFDM系统中,提供了一种用于传输的方法。 该方法包括以下步骤:调整PN序列长度,由此保持所需的性能。 调整步骤包括增加,减少或保持不变PN序列长度。

    METHOD FOR CHANNEL ESTIMATION
    64.
    发明申请
    METHOD FOR CHANNEL ESTIMATION 审中-公开
    信道估计方法

    公开(公告)号:US20080025418A1

    公开(公告)日:2008-01-31

    申请号:US11550358

    申请日:2006-10-17

    IPC分类号: H04K1/10 H04L27/06

    摘要: A channel estimation using the received PN (pseudo-noise) sequence associated with a received frame among a plurality of associated, neighboring frames. The estimation using a value associated with a point of a currently frame as a denominator in a predetermined formula. If the value is smaller than its corresponding value in a neighboring frame, the neighboring frame's corresponding value is used instead of the value of the current frame.

    摘要翻译: 使用与多个相关联的相邻帧中的接收帧相关联的接收PN(伪噪声)序列的信道估计。 使用与当前帧的点相关联的值作为预定公式中的分母的估计。 如果该值小于相邻帧中的对应值,则使用相邻帧的对应值而不是当前帧的值。

    METHOD AND APPARATUS FOR FREQUENCY DOMAIN EXUALIZATION BASED UPON A DECISION FEEDBACK IN A TDS-OFDM RECEIVER
    65.
    发明申请
    METHOD AND APPARATUS FOR FREQUENCY DOMAIN EXUALIZATION BASED UPON A DECISION FEEDBACK IN A TDS-OFDM RECEIVER 审中-公开
    基于TDS-OFDM接收机中的决策反馈的频域实现的方法和装置

    公开(公告)号:US20080025384A1

    公开(公告)日:2008-01-31

    申请号:US11550342

    申请日:2006-10-17

    IPC分类号: H03H7/30 H04K1/10 H04L27/06

    摘要: A device for equalization adapted for receiving a symbol and a channel frequency response is provided. The device includes a slicer for delimiting the channel frequency response to a sliced channel frequency response based upon a signal constellation; and a divider for dividing the received symbol using the sliced channel frequency response as the divider, with a resultant quotient of the divider as a reference point for future received symbols.

    摘要翻译: 提供一种用于均衡的装置,用于接收符号和信道频率响应。 所述设备包括限幅器,用于基于信号星座将所述信道频率响应定界为限幅信道频率响应; 以及用于使用分片信道频率响应分割接收到的符号作为分频器的除法器,分频器的合成商作为未来接收符号的参考点。

    MRI/MRS Gradient Coil with Integrated Cooling Circuits
    66.
    发明申请
    MRI/MRS Gradient Coil with Integrated Cooling Circuits 有权
    具有集成冷却电路的MRI / MRS梯度线圈

    公开(公告)号:US20070236218A1

    公开(公告)日:2007-10-11

    申请号:US11279107

    申请日:2006-04-09

    申请人: Qin Liu

    发明人: Qin Liu

    IPC分类号: G01V3/00

    CPC分类号: G01R33/3856

    摘要: Systems, methods and apparatus are provided through which heat produced in the patient examination space by the power used to create electromagnetic fields in an MRI/MRS system is significantly reduced by coolant carried by one of two split connected concentric coil layers of one of two of the primary gradient coils used to alter the main magnetic field. The coil carrying the coolant is made of copper tubing. The second primary gradient coil is placed between the layers of the split primary gradient coil. Adjusting the number of turns in each layer of the split primary gradient coil adjusts the heat generated. The inductances and resistances of the two primary gradient coils are balanced by adjusting the gain of the coils.

    摘要翻译: 提供了一种系统,方法和装置,通过这些系统,方法和装置,通过用于在MRI / MRS系统中产生电磁场的功率在病人检查空间中产生的热量由两个分开连接的同心线圈层之一 用于改变主磁场的主梯度线圈。 承载冷却剂的盘管由铜管制成。 第二主梯度线圈被放置在分裂初级梯度线圈的层之间。 调整分裂初级梯度线圈每层的匝数调节产生的热量。 通过调节线圈的增益来平衡两个主梯度线圈的电感和电阻。

    Iterative assessment of multipath signal presence
    67.
    发明授权
    Iterative assessment of multipath signal presence 失效
    多径信号存在的迭代评估

    公开(公告)号:US07170944B1

    公开(公告)日:2007-01-30

    申请号:US10291154

    申请日:2002-11-07

    申请人: Qin Liu Lin Yang

    发明人: Qin Liu Lin Yang

    IPC分类号: H04L27/28 H04J11/00

    摘要: Method and system for determining whether one or more multipath signals is present in a received signal frame that includes a reference symbol (RS) sequence RS(t;m1) as part of the frame, and for iteratively evaluating a multipath signal that is present. The RS sequence index (m1) for the frame is identified, and first and second Fourier transforms Φ(f;m1;ref) and Φ(f;rec) for the received frame are provided for a selected time segment IS that includes the RS sequence of the received frame. An inverse Fourier transform σ(t;m1) of the ratio of the transforms is computed and analyzed. If at least one multipath signal is present, σ(t;m1) is nonlinearly filtered, and the filtered function is convolved with RS(t;m1). This convolution represents a received signal extension, due to multipath signal(s) presence. A refinement procedure analyzes a contribution to multipath signals from the preceding frame(s). The procedure is iteratively driven toward an optimal representation of any multipath signal(s) present.

    摘要翻译: 用于确定在包括作为帧的一部分的参考符号(RS)序列RS(t; m 1)的接收信号帧中是否存在一个或多个多径信号的方法和系统,并且用于迭代地评估存在的多径信号 。 识别该帧的RS序列索引(m 1),并且为所选择的时间段IS提供接收帧的第一和第二傅里叶变换Phi(f; m 1; ref)和Phi(f; rec) 接收帧的RS序列。 计算和分析变换比率的傅立叶逆变换Σ(t; m 1)。 如果存在至少一个多径信号,则σ(t; m 1)被非线性滤波,滤波后的函数与RS(t; m 1)卷积。 由于多路径信号存在,该卷积表示接收到的信号扩展。 细化程序分析对来自前一帧的多路径信号的贡献。 该过程被迭代地驱动到存在的任何多径信号的最佳表示。