METHOD TO SYNCHRONIZE RECEIVER'S CLOCK TO TRANSMITTER'S CLOCK AT SUB-100NSEC
    1.
    发明申请
    METHOD TO SYNCHRONIZE RECEIVER'S CLOCK TO TRANSMITTER'S CLOCK AT SUB-100NSEC 审中-公开
    将接收器的时钟同步到100ns以下的发送器时钟的方法

    公开(公告)号:WO2006075312A3

    公开(公告)日:2006-09-14

    申请号:PCT/IB2006050136

    申请日:2006-01-13

    CPC classification number: H04L7/08 H04W56/0085

    Abstract: A sender (702) transmits one or more frames to a receiver (704). The receiver (704) either calculates a carrier frequency difference or a time difference using the one or more frames. A clock (722) in the receiver (704) is synchronized with a clock (714) in the sender (702) using the carrier frequency difference or the time difference.

    Abstract translation: 发送器(702)将一个或多个帧发送到接收器(704)。 接收器(704)使用一个或多个帧来计算载波频率差或时间差。 接收器(704)中的时钟(722)使用载波频率差或时间差与发送器(702)中的时钟(714)同步。

    IMPROVING PERFORMANCE IN A TIME-FREQUENCY INTERLEAVED ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM
    4.
    发明申请
    IMPROVING PERFORMANCE IN A TIME-FREQUENCY INTERLEAVED ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 审中-公开
    提高时频间隔正交频分复用系统的性能

    公开(公告)号:WO2008068669A1

    公开(公告)日:2008-06-12

    申请号:PCT/IB2007/054823

    申请日:2007-11-28

    CPC classification number: H04L25/022 H04L27/2649

    Abstract: In one embodiment, a TFI-OFDM receiver system (22) is able to more reliably decode the information bits by estimating the noise variance associated with the channel and using these estimates in mitigating in-band interference. In another embodiment, there is a TFI-OFDM receiver system (66) that is able to update the estimated channel impulse response and the noise variance by generating reference OFDM symbols from the received header symbols, the band hopping pattern provided by the TFC number associated with the communication link, the estimated channel impulse response and the noise variance estimates and symbols generated from a FFT processor (30).

    Abstract translation: 在一个实施例中,TFI-OFDM接收机系统(22)能够通过估计与信道相关联的噪声方差并且在减轻带内干扰中使用这些估计来更可靠地解码信息比特。 在另一个实施例中,存在TFI-OFDM接收机系统(66),其能够通过从接收到的标题符号生成参考OFDM符号来更新所估计的信道脉冲响应和噪声方差,所述TFC号码相关联提供的跳频模式 通信链路,估计信道脉冲响应和从FFT处理器(30)产生的噪声方差估计和符号。

    METHODS AND APPARATUSES FOR CHANNEL ESTIMATION FOR WIDEBAND OFDM COMMUNICATION SYSTEMS
    5.
    发明申请
    METHODS AND APPARATUSES FOR CHANNEL ESTIMATION FOR WIDEBAND OFDM COMMUNICATION SYSTEMS 审中-公开
    用于宽带OFDM通信系统的信道估计的方法和装置

    公开(公告)号:WO2006021939A2

    公开(公告)日:2006-03-02

    申请号:PCT/IB2005/052806

    申请日:2005-08-26

    Inventor: ZHANG, Yifeng

    Abstract: Systems and methods according to the present invention provide channel estimation methods, systems and devices which determine a coarse channel estimate (40) and a fine channel estimate (66). The coarse channel (40) estimate can be determined based on the channel estimation sequence transmitted to the receiver and then used to detect header symbols. The header symbols can be used to calculate additional channel estimates which can then be combined with the coarse channel estimate (40) to determine a fine channel estimate (66).

    Abstract translation: 根据本发明的系统和方法提供了确定粗略信道估计(40)和精细信道估计(66)的信道估计方法,系统和装置。 可以基于发送到接收机的信道估计序列来确定粗信道(40)估计,然后用于检测报头符号。 标题符号可以用于计算附加信道估计,然后可以与粗信道估计(40)组合以确定精细信道估计(66)。

    TRANSCEIVER WITH I/Q MISMATCH COMPENSATION SCHEME
    6.
    发明申请
    TRANSCEIVER WITH I/Q MISMATCH COMPENSATION SCHEME 审中-公开
    具有I / Q误差补偿方案的收发器

    公开(公告)号:WO2004082232A1

    公开(公告)日:2004-09-23

    申请号:PCT/IB2004/000668

    申请日:2004-03-11

    CPC classification number: G01V15/00 H03D3/009 H04L27/2649 H04L27/364

    Abstract: A transceiver (300) is provided with a compensation scheme for compensating gain and phase mismatches introduced by respective pairs of base-band filters in the receiver (130a, 130b) and transmitter (230a, 230b) of a wireless transceiver. A correction signal is derived from the gain and phase mismatch observed during loop back tests during which a signal of known characteristics at a selected frequency is passed through the base-band filters. The selected frequency belongs to the spectrum of the sub-band to which the quadrature signals belong.

    Abstract translation: 收发器(300)具有用于补偿由无线收发器的接收器(130a,130b)和发送器(230a,230b)中的各对基带滤波器引入的增益和相位失配的补偿方案。 在环回测试期间观察到的增益和相位失配导出校正信号,在此期间,所选频率处的已知特性的信号通过基带滤波器。 所选频率属于正交信号所属的子带的频谱。

    METHODS AND APPARATUSES FOR CHANNEL ESTIMATION FOR WIDEBAND OFDM COMMUNICATION SYSTEMS
    9.
    发明申请
    METHODS AND APPARATUSES FOR CHANNEL ESTIMATION FOR WIDEBAND OFDM COMMUNICATION SYSTEMS 审中-公开
    用于宽带OFDM通信系统的信道估计的方法和设备

    公开(公告)号:WO2006021939A3

    公开(公告)日:2006-04-20

    申请号:PCT/IB2005052806

    申请日:2005-08-26

    Inventor: ZHANG YIFENG

    Abstract: Systems and methods according to the present invention provide channel estimation methods, systems and devices which determine a coarse channel estimate (40) and a fine channel estimate (66). The coarse channel (40) estimate can be determined based on the channel estimation sequence transmitted to the receiver and then used to detect header symbols. The header symbols can be used to calculate additional channel estimates which can then be combined with the coarse channel estimate (40) to determine a fine channel estimate (66).

    Abstract translation: 根据本发明的系统和方法提供了确定粗略信道估计(40)和精细信道估计(66)的信道估计方法,系统和设备。 粗信道(40)估计可以基于发送到接收机的信道估计序列来确定,然后用于检测报头符号。 标头符号可用于计算额外的信道估计,然后可将其与粗略信道估计(40)组合以确定精细信道估计(66)。

Patent Agency Ranking