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2. 发明申请

WO1998039854A1 RECEIVER WITH FREQUENCY OFFSET CORRECTING FUNCTION 审中-公开
标题翻译：接收器具有频率偏移校正功能
公开(公告)号：WO1998039854A1
公开(公告)日：1998-09-11
申请号：PCT/JP1997000653
申请日：1997-03-04
申请人： MITSUBISHI DENKI KABUSHIKI KAISHA , NAGAYASU, Takayuki , MURAKAMI, Keishi
发明人： MITSUBISHI DENKI KABUSHIKI KAISHA
IPC分类号： H04B03/10
CPC分类号： H04L25/0236 , H03J7/02 , H04B7/01 , H04L25/0212 , H04L25/0226 , H04L25/025 , H04L25/03273 , H04L25/03292 , H04L27/0014 , H04L2027/0038 , H04L2027/0055 , H04L2027/0059 , H04L2027/0067
摘要： A receiver with frequency offset correcting function corrects distortion caused by interference between codes and a frequency offset in received signals. In order to correct the distorsion, a frequency offset correcting circuit (21) corrects the received signals based on an estimated frequency offset value. A first CIR estimating circuit (22) finds an estimated CIR value at a first position based on an already known training sequence in the corrected received signals. A second estimating circuit (24) finds another estimated CIR value at a second position which is different from the first position by updating the estimated CIR value at the first position as an initial value in accordance with an LMS algorithm based on the corrected received signals and a decision value outputted from an equalizer (13). A phase deviation detecting circuit (15) calculates phase deviations based on the estimated CIR values at the first and second positions and an averaging circuit (26) averages the phase deviations and outputs the average phase deviation to a frequency offset correcting circuit (21) as an estimated frequency offset value.
摘要翻译：具有频偏校正功能的接收机校正由代码之间的干扰和接收信号中的频率偏移引起的失真。为了校正变形，频偏校正电路（21）基于估计的频率偏移值来校正接收信号。第一CIR估计电路（22）根据校正后的接收信号中已知的训练序列，求出第一位置的估计CIR值。第二估计电路（24）通过基于校正的接收信号根据LMS算法将作为初始值的第一位置处的估计CIR值更新为与第一位置不同的第二位置的另一估计CIR值，以及从均衡器（13）输出的判定值。相位偏差检测电路（15）基于第一和第二位置处的估计CIR值来计算相位偏差，并且平均电路（26）对相位偏差进行平均，并将平均相位偏差输出到频偏校正电路（21），作为估计频率偏移值。

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