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1. 发明申请

US20090034651A1 METHOD FOR FAST CONVERGENCE CALIBRATION OF RADIO-FREQUENCY TRANSCEIVERS 审中-公开
标题翻译：无线电频率收敛器快速融合校准方法
公开(公告)号：US20090034651A1
公开(公告)日：2009-02-05
申请号：US11830569
申请日：2007-07-30
申请人： Tim Lan , Sheng Lin , Lekun Lin
发明人： Tim Lan , Sheng Lin , Lekun Lin
IPC分类号： H04K1/02
CPC分类号： H04L27/2601 , H04L25/061 , H04L27/364 , H04L27/3863
摘要： To more efficiently compensate for modulation imbalance, a mobile device modulates and demodulates a calibration tone and generates digital data representing modulation imbalance effects on the calibration tone. Using digital data enables modulation imbalance effects to be quickly estimated using digital signal processing techniques, increasing the number of estimates of modulation imbalance effects calculated. The modulation imbalance estimates are used to refine one or more compensation parameters which are applied to transmitted and/or received signals to compensate for errors caused by modulation.
摘要翻译：为了更有效地补偿调制不平衡，移动设备对校准音进行调制和解调，并生成表示对校准音进行调制不平衡的数字数据。使用数字数据使得能够使用数字信号处理技术快速估计调制不平衡效应，从而增加计算出的调制不平衡效应的估计数。调制不平衡估计用于细化应用于发射和/或接收信号的一个或多个补偿参数，以补偿由调制引起的误差。

2. 发明授权

US11128501B2 Method for fast convergence calibration of radio-frequency transceivers 有权
公开(公告)号：US11128501B2
公开(公告)日：2021-09-21
申请号：US11830569
申请日：2007-07-30
申请人： Tim Lan , Sheng Lin , Lekun Lin
发明人： Tim Lan , Sheng Lin , Lekun Lin
IPC分类号： H04L27/00 , H04L27/26 , H04L25/06 , H04L27/36 , H04L27/38
摘要： To more efficiently compensate for modulation imbalance, a mobile device modulates and demodulates a calibration tone and generates digital data representing modulation imbalance effects on the calibration tone. Using digital data enables modulation imbalance effects to be quickly estimated using digital signal processing techniques, increasing the number of estimates of modulation imbalance effects calculated. The modulation imbalance estimates are used to refine one or more compensation parameters which are applied to transmitted and/or received signals to compensate for errors caused by modulation.

3. 发明申请

US20100027717A1 Equalization of OFDM Signals Based on Time and Then Frequency Interpolation 审中-公开
标题翻译：基于时间和频率插值的OFDM信号均衡
公开(公告)号：US20100027717A1
公开(公告)日：2010-02-04
申请号：US11831364
申请日：2007-07-31
申请人： Lekun Lin , Sheng Lin , Kai Xie
发明人： Lekun Lin , Sheng Lin , Kai Xie
IPC分类号： H04L27/06
CPC分类号： H04L25/022 , H04L25/0232
摘要： Two dimensional interpolation techniques are used to compensate for time-varying channel gain H in an OFDM system. The channel gain can be reasonably estimated at various times and at various frequencies due, for example, to the use of pilot tones. These channel estimates are used to estimate the channel gain at other times and/or frequencies by two-dimensional interpolation, interpolating first with respect to time (e.g., with respect to a symbol index s) and then with respect to frequency (e.g., with respect to a sub-carrier index c).
摘要翻译：二维内插技术用于补偿OFDM系统中的时变信道增益H. 由于例如使用导频音，可以在各种时间和各种频率下合理地估计信道增益。这些信道估计用于通过二维插值来估计其他时间和/或频率处的信道增益，首先相对于时间（例如，相对于符号索引s）然后相对于频率进行内插（例如，与关于副载体索引c）。

4. 发明授权

US07233268B1 Multi-stage sample rate converter 失效
标题翻译：多级采样率转换器
公开(公告)号：US07233268B1
公开(公告)日：2007-06-19
申请号：US11422071
申请日：2006-06-03
申请人： Lekun Lin , Sheng Lin
发明人： Lekun Lin , Sheng Lin
IPC分类号： H03M7/00
CPC分类号： H03H17/0621 , H03H17/0685
摘要： Architectures of multi-stage sample rate converters are disclosed. According to one aspect of the present invention, a received signal with a higher sampling rate is converted to a lower sampling rate. To prevent aliasing in the resultant signal, an anti-aliasing filter is introduced. The passband of the anti-aliasing filter is so adjusted according to the conversation rate of a sample rate converter. To keep the implementation relatively simple, the coefficients of the filter are kept constant. Therefore, the conversation rate of a sample rate converter is constrained in a limited range, thus requiring only a constant anti-aliasing filter. A series of halfband filters are then used to convert the signal to a desired sampling rate.
摘要翻译：公开了多级采样率转换器的架构。根据本发明的一个方面，具有较高采样率的接收信号被转换成较低的采样率。为了防止所得信号中的混叠，引入了抗混叠滤波器。抗混叠滤波器的通带根据采样率转换器的通话速率进行调整。为了保持相对简单的实现，滤波器的系数保持不变。因此，采样率转换器的通话速率被限制在有限的范围内，因此仅需要恒定的抗混叠滤波器。然后使用一系列半带滤波器将信号转换成所需的采样率。

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