CHANNEL ESTIMATOR WITH EXTENDED CHANNEL BANDWIDTH
    1.
    发明申请
    CHANNEL ESTIMATOR WITH EXTENDED CHANNEL BANDWIDTH 审中-公开
    具有扩展信道带宽的信道估计器

    公开(公告)号:WO2006065434A2

    公开(公告)日:2006-06-22

    申请号:PCT/US2005/041747

    申请日:2005-11-17

    IPC分类号: H04B1/707

    摘要: A method (1700) and apparatus (1801) provide channel estimation with extended bandwidth filters. Antenna (1813) receives a signal such as a pilot signal and detects a bandwidth associated with the pilot signal in a detector (320). One of a plurality of filters (603, 605, 607, and 609) including extended bandwidth filters (311) and a default filter (305) can be selected by a selector (617). If the detector detects activity associated with a wider bandwidth, the filter associated with the wider bandwidth is selected over the presently selected filter. If no activity is detected, the default filter is selected.

    摘要翻译: 方法(1700)和装置(1801)使用扩展带宽滤波器来提供信道估计。 天线(1813)接收诸如导频信号之类的信号并且在检测器(320)中检测与导频信号相关联的带宽。 可以由选择器(617)选择包括扩展带宽滤波器(311)和默认滤波器(305)的多个滤波器(603,605,607和609)之一。 如果检测器检测到与较宽带宽相关的活动,则通过当前选择的过滤器选择与较宽带宽相关的过滤器。 如果未检测到任何活动,则选择默认过滤器。

    ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS MESSAGE PROCESSING METHOD AND APPARATUS

    公开(公告)号:WO2008002708A3

    公开(公告)日:2008-01-03

    申请号:PCT/US2007/065590

    申请日:2007-03-30

    摘要: A base station receives (201) OFDMA messages from a plurality of end user platforms that share all used tones within at least one OFDMA symbol. By one approach this base station then uses (202) a fixed starting time to select contiguous samples from received aggregate multi-user signals wherein the fixed starting time is offset from a reference time that comprises a time at which the base station expects to be receiving the signals from all end users. In combination with the time offset approach noted above or in lieu thereof the base station can process (204) selected contiguous samples using fast Fourier transform and then provide (205) phase rotation with respect to those processed samples. When applying phase rotation, by one approach a phase rotation can be applied (401) to the aggregate multi-user signal and, in addition, individual phase rotation can be applied (402) as determined on a user-by-user basis.

    CHANNEL ESTIMATOR WITH EXTENDED CHANNEL BANDWIDTH
    4.
    发明申请
    CHANNEL ESTIMATOR WITH EXTENDED CHANNEL BANDWIDTH 审中-公开
    具有扩展通道带宽的通道估计器

    公开(公告)号:WO2006065434A3

    公开(公告)日:2006-11-23

    申请号:PCT/US2005041747

    申请日:2005-11-17

    摘要: A method (1700) and apparatus (1801) provide channel estimation with extended bandwidth filters. Antenna (1813) receives a signal such as a pilot signal and detects a bandwidth associated with the pilot signal in a detector (320). One of a plurality of filters (603, 605, 607, and 609) including extended bandwidth filters (311) and a default filter (305) can be selected by a selector (617). If the detector detects activity associated with a wider bandwidth, the filter associated with the wider bandwidth is selected over the presently selected filter. If no activity is detected, the default filter is selected.

    摘要翻译: 一种方法(1700)和装置(1801)提供具有扩展带宽滤波器的信道估计。 天线(1813)接收诸如导频信号的信号,并且在检测器(320)中检测与导频信号相关联的带宽。 选择器(617)可以选择包括扩展带宽滤波器(311)和默认滤波器(305)的多个滤波器(603,605,607和609)之一。 如果检测器检测到与更宽带宽相关联的活动,则通过当前选择的滤波器选择与较宽带宽相关联的滤波器。 如果没有检测到活动,则选择默认过滤器。

    BLOCK CODEWORD DECODER WITH CONFIDENCE INDICATOR
    8.
    发明申请
    BLOCK CODEWORD DECODER WITH CONFIDENCE INDICATOR 审中-公开
    带有信号指示器的块编码解码器

    公开(公告)号:WO2008027636A1

    公开(公告)日:2008-03-06

    申请号:PCT/US2007/070302

    申请日:2007-06-04

    IPC分类号: H04L1/00

    CPC分类号: H04L1/0057 H04L25/067

    摘要: A wireless transceiver (100) that produces soft decisions for received, block error correction encoded codewords and a confidence indicator signifying a likelihood of errors in the detected data. The wireless transceiver (100) processes block encrypted signals, such as feedback channel messages in a WiMax uplink. Upon receiving a signal, a soft decision is determined for received block encoded codewords. A difference is calculated between a soft decision metric for a most likely detected codeword and a soft decision metric for a next most likely detected codeword. This difference is normalized based upon the total decoder input power received over the received signal (201 ). The normalized difference is then scaled by a channel dependent factor and is time filtered. The normalized and time filtered confidence indicator output (212) is able to be provided to a wireless network controller to assess the usability of the received data.

    摘要翻译: 一种无线收发器(100),其产生用于接收到的块错误校正编码码字的软判决,以及表示检测到的数据中的错误的可能性的置信度指示符。 无线收发器(100)处理块加密信号,例如WiMax上行链路中的反馈信道消息。 在接收到信号时,确定接收的块编码码字的软判决。 在最可能检测到的码字的软判决度量与下一个最可能的检测码字的软判决度量之间计算差。 该差异是基于在接收信号(201)上接收的总解码器输入功率而被归一化的。 然后通过信道相关因子对归一化差异进行缩放,并进行时间滤波。 归一化和时间滤波的置信度指示符输出(212)能够被提供给无线网络控制器以评估所接收数据的可用性。

    ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS MESSAGE PROCESSING METHOD AND APPARATUS
    9.
    发明申请
    ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS MESSAGE PROCESSING METHOD AND APPARATUS 审中-公开
    正交频分多路访问消息处理方法和设备

    公开(公告)号:WO2008002708A2

    公开(公告)日:2008-01-03

    申请号:PCT/US2007065590

    申请日:2007-03-30

    IPC分类号: H04J11/00

    摘要: A base station receives (201) OFDMA messages from a plurality of end user platforms that share all used tones within at least one OFDMA symbol. By one approach this base station then uses (202) a fixed starting time to select contiguous samples from received aggregate multi-user signals wherein the fixed starting time is offset from a reference time that comprises a time at which the base station expects to be receiving the signals from all end users. In combination with the time offset approach noted above or in lieu thereof the base station can process (204) selected contiguous samples using fast Fourier transform and then provide (205) phase rotation with respect to those processed samples. When applying phase rotation, by one approach a phase rotation can be applied (401) to the aggregate multi-user signal and, in addition, individual phase rotation can be applied (402) as determined on a user-by-user basis.

    摘要翻译: 基站从至少一个OFDMA符号中共享所有使用的音调的多个终端用户平台接收(201)OFDMA消息。 通过一种方法,该基站然后使用(202)固定的开始时间来从接收到的聚合多用户信号中选择连续样本,其中固定的开始时间偏离包括基站期望接收的时间的参考时间 来自所有终端用户的信号。 结合上述时间偏移方法或代替它,基站可以使用快速傅里叶变换来处理(204)选择的连续采样,然后提供(205)相对于那些处理样本的相位旋转。 当应用相位旋转时,通过一种方法可以将相位旋转(401)应用于聚合多用户信号,并且另外,可以在逐个用户的基础上确定单独的相位旋转(402)。