Apparatus for estimating a frequency offset in a communication system and method thereof
    12.
    发明申请
    Apparatus for estimating a frequency offset in a communication system and method thereof 审中-公开
    用于估计通信系统中的频率偏移的装置及其方法

    公开(公告)号:US20060093076A1

    公开(公告)日:2006-05-04

    申请号:US11259688

    申请日:2005-10-26

    IPC分类号: H04L27/06 H03D1/04

    摘要: An apparatus and method for estimating a frequency offset using a preamble signal having a periodically repeated structure. According to the apparatus and method, the sum of or the difference between an input signal and a delay signal is calculated without obtaining a simple correlation value between the input signal and the delay signal, and then a correlation value between a calculated signal and the delay signal is obtained. Accordingly, the implementation complexity of the circuit and the power consumption are reduced, and thus, the battery cycle of a terminal provided with the frequency offset estimating circuit can be increased.

    摘要翻译: 一种使用具有周期性重复结构的前导码信号来估计频率偏移的装置和方法。 根据该装置和方法,计算出输入信号与延迟信号之差或差值之和,而无需获得输入信号与延迟信号之间的简单相关值,然后计算出的信号与延迟信号之间的相关值 信号。 因此,电路的实现复杂度和功耗被降低,从而可以增加设置有频率偏移估计电路的终端的电池周期。

    Apparatus and method for channel estimation for data demodulation in broadband wireless access system
    14.
    发明授权
    Apparatus and method for channel estimation for data demodulation in broadband wireless access system 有权
    宽带无线接入系统中数据解调的信道估计装置及方法

    公开(公告)号:US07801252B2

    公开(公告)日:2010-09-21

    申请号:US11710852

    申请日:2007-02-26

    IPC分类号: H03D1/00 H04L27/06

    CPC分类号: H04L25/023

    摘要: Provided is a channel estimation apparatus and method. In the channel estimation apparatus, a channel estimator performs channel estimation onto a received symbol and output a channel estimation result. The channel estimation result is stored in an estimation buffer along with a channel estimation result compensated in a preamble phase compensator. The preamble phase compensator receives a channel estimation result for pilot subcarriers of a data symbol and a preamble channel estimation result from the estimation buffer, acquires a phase rotation value between them, and compensates the preamble channel estimation result with the phase rotation value. When FCH and DL-MAP are demodulated, pilot subcarriers in the Nth PUSC symbol have been used to estimate the channel of the Nth PUSC symbol.

    摘要翻译: 提供了一种信道估计装置和方法。 在信道估计装置中,信道估计器对所接收的符号进行信道估计并输出信道估计结果。 信道估计结果与在前置码相位补偿器中补偿的信道估计结果一起存储在估计缓冲器中。 前导码相位补偿器从估计缓冲器接收数据符号的导频子载波的信道估计结果和前导信道估计结果,获取相位旋转值,并以相位旋转值补偿前导信道估计结果。 当FCH和DL-MAP被解调时,第N PUSC符号中的导频子载波已被用于估计第N个PUSC符号的信道。

    Method and apparatus for cell search in wireless communication system
    15.
    发明授权
    Method and apparatus for cell search in wireless communication system 有权
    无线通信系统中小区搜索的方法和装置

    公开(公告)号:US07532902B2

    公开(公告)日:2009-05-12

    申请号:US11312172

    申请日:2005-12-20

    IPC分类号: H04W68/00 H04J11/00 H04W4/00

    摘要: Disclosed is an apparatus and a method for performing a cell search in a wireless communication system. A subscriber station calculates the power of subcarriers according to their positions in a preamble signal of a frequency domain and identifies a segment of a cell to which the subscriber station belongs. Then, the subscriber station correlates PN sequences, which correspond to the segment of the cell that has been identified, with the preamble signal of the frequency domain. Therefore, the number of calculations for determining correlation values in a cell search is remarkably reduced.

    摘要翻译: 公开了一种用于在无线通信系统中执行小区搜索的装置和方法。 用户台根据频域的前导信号中的位置来计算子载波的功率,并且识别用户站所属的小区的一段。 然后,用户台将对应于已经识别的小区的段的PN序列与频域的前导信号相关联。 因此,用于确定小区搜索中的相关值的计算次数显着降低。

    Apparatus and method for receiving signal in a communication system
    16.
    发明授权
    Apparatus and method for receiving signal in a communication system 失效
    用于在通信系统中接收信号的装置和方法

    公开(公告)号:US07594160B2

    公开(公告)日:2009-09-22

    申请号:US11450815

    申请日:2006-06-09

    IPC分类号: H03M13/45

    摘要: Provided is an apparatus and method for receiving a signal in communication system. The apparatus and method includes generating a particular log-likelihood ratio (LLR) value by demapping an input signal according to a particular demapping scheme among a plurality of demapping schemes; performing a control operation of buffering the particular LLR value in a particular LLR sub-buffer for buffering an LLR value generated according to the particular demapping scheme among the plurality of LLR sub-buffers for buffering an LLR value generated according to each of the plurality of demapping schemes; and performing a control operation of reading an LLR value buffered in an LLR buffer including the plurality of LLR sub-buffers.

    摘要翻译: 提供了一种用于在通信系统中接收信号的装置和方法。 该装置和方法包括通过根据多个解映射方案中的特定解映射方案对输入信号进行解映射来产生特定对数似然比(LLR)值; 执行缓冲特定LLR子缓冲器中的特定LLR值的控制操作,用于缓冲根据多个LLR子缓冲器中的特定解映射方案生成的LLR值,用于缓冲根据多个LLR子缓冲器中的每一个产生的LLR值 解散计划; 以及执行读取在包括所述多个LLR子缓冲器的LLR缓冲器中缓冲的LLR值的控制操作。

    Apparatus and method for channel estimation for data demodulation in broadband wireless access system
    17.
    发明申请
    Apparatus and method for channel estimation for data demodulation in broadband wireless access system 有权
    宽带无线接入系统中数据解调的信道估计装置及方法

    公开(公告)号:US20070211832A1

    公开(公告)日:2007-09-13

    申请号:US11710852

    申请日:2007-02-26

    IPC分类号: H04L27/06 H03D1/00

    CPC分类号: H04L25/023

    摘要: Provided is a channel estimation apparatus and method. In the channel estimation apparatus, a channel estimator performs channel estimation onto a received symbol and output a channel estimation result. The channel estimation result is stored in an estimation buffer along with a channel estimation result compensated in a preamble phase compensator. The preamble phase compensator receives a channel estimation result for pilot subcarriers of a data symbol and a preamble channel estimation result from the estimation buffer, acquires a phase rotation value between them, and compensates the preamble channel estimation result with the phase rotation value. When FCH and DL-MAP are demodulated, pilot subcarriers in the Nth PUSC symbol have been used to estimate the channel of the Nth PUSC symbol.

    摘要翻译: 提供了一种信道估计装置和方法。 在信道估计装置中,信道估计器对所接收的符号进行信道估计并输出信道估计结果。 信道估计结果与在前置码相位补偿器中补偿的信道估计结果一起存储在估计缓冲器中。 前导码相位补偿器从估计缓冲器接收数据符号的导频子载波的信道估计结果和前导信道估计结果,获取相位旋转值,并以相位旋转值补偿前导信道估计结果。 当FCH和DL-MAP被解调时,第N个PUSC符号中的导频子载波已被用于估计第N个PUSC符号的信道。

    Apparatus and method for performing time domain channel estimation in a communication system
    19.
    发明申请
    Apparatus and method for performing time domain channel estimation in a communication system 审中-公开
    在通信系统中执行时域信道估计的装置和方法

    公开(公告)号:US20060133529A1

    公开(公告)日:2006-06-22

    申请号:US11313897

    申请日:2005-12-21

    IPC分类号: H04K1/10

    摘要: In an orthogonal frequency division multiplexing (OFDM) system, channel estimates of pilot subcarriers in a current input symbol are input, and time domain channel estimation for data subcarriers positioned between adjacent pilot subcarriers is performed by linear interpolating channel estimates of the adjacent pilot subcarriers associated with each of the pilot subcarriers in the current input symbol during a time interval of the current input symbol.

    摘要翻译: 在正交频分复用(OFDM)系统中,输入当前输入符号中的导频子载波的信道估计,并且通过相邻导频子载波关联的线性内插信道估计来执行位于相邻导频子载波之间的数据子载波的时域信道估计 在当前输入符号的时间间隔内的当前输入符号中的每个导频子载波。