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1. 发明申请

WO2009046209A1 METHOD AND APPARATUS FOR EFFICIENT DC CALIBRATION IN A DIRECT-CONVERSION SYSTEM WITH VARIABLE DC GAIN 审中-公开
标题翻译：具有可变直流增益的直接转换系统中有效直流校准的方法和装置
公开(公告)号：WO2009046209A1
公开(公告)日：2009-04-09
申请号：PCT/US2008/078611
申请日：2008-10-02
申请人： MAXLINEAR, INC. , LING, Curtis , LO, Andy , SEDALO, Tete
发明人： LING, Curtis , LO, Andy , SEDALO, Tete
IPC分类号： H04B1/06
CPC分类号： H04B1/16 , H04B1/40
摘要： A wireless communication receiver includes a multitude of look-up tables each storing a multitude of DC offset values associated with the gains of an amplification stage disposed in the wireless communication receiver. The entries for each look-up table are estimated during a stage of the calibration phase. During such a calibration stage, for each selected gain of an amplification stage, a search logic estimates a current DC offset number and compares it to a previous DC offset estimate that is fed back to the search logic. If the difference between the current and previous estimates is less than a predefined threshold value, the current estimate is treated as being associated with the DC offset of the selected gain of the amplification stage and is stored in the look-up table. This process is repeated for each selected gain of each amplification stage of interest until the look-up tables are populated.
摘要翻译：无线通信接收机包括多个查找表，每个查找表存储与设置在无线通信接收机中的放大级的增益相关联的多个DC偏移值。在校准阶段的阶段估计每个查找表的条目。在这样的校准阶段期间，对于放大级的每个所选增益，搜索逻辑估计当前DC偏移数，并将其与反馈到搜索逻辑的先前DC偏移估计进行比较。如果当前和先前估计之间的差值小于预定义的阈值，则将当前估计值视为与放大级的所选增益的DC偏移相关联，并存储在查找表中。对于感兴趣的每个扩增阶段的每个选择的增益重复该过程，直到查找表被填充。

2. 发明申请

WO2011037627A1 IMPULSE NOISE MITIGATION UNDER OUT-OF-BAND INTERFERENCE CONDITIONS 审中-公开
标题翻译：在带外干扰条件下的噪声噪声抑制
公开(公告)号：WO2011037627A1
公开(公告)日：2011-03-31
申请号：PCT/US2010/002598
申请日：2010-09-23
申请人： MAXLINEAR, INC. , LO, Andy , KANG, Sugbong
发明人： LO, Andy , KANG, Sugbong
IPC分类号： H04B1/10
CPC分类号： H04B1/1036 , H04B1/10
摘要： A noise abatement method and system for impulse noise in an RF receiver where the RF analog signal is converted to a digital signal prior to being connected to a demodulator. Two filters are used to detect impulse noise signals even under out-of-band interferer conditions, and prevent the impulse noise from reaching the input to the demodulator. A first of the two filters detects impulse noise using signals lower than the frequency bandwidth of the desired signal, and a second of the two filters detects impulse noise using signals higher the frequency bandwidth of the desired signal. A mean magnitude of the signal is detected over a predetermined time T and is used to select which filter to use for noise abatement.
摘要翻译： RF接收机中的脉冲噪声的噪声消除方法和系统，其中RF模拟信号在连接到解调器之前被转换成数字信号。即使在带外干扰信号条件下，也可使用两个滤波器来检测脉冲噪声信号，并防止脉冲噪声到达解调器的输入。两个滤波器中的第一个滤波器使用低于期望信号的频率带宽的信号来检测脉冲噪声，并且两个滤波器中的第二个滤波器使用更高所需信号的频率带宽的信号来检测脉冲噪声。在预定时间T内检测信号的平均幅度，并且用于选择用于噪声消除的哪个滤波器。

3. 发明公开

EP2206239A1 METHOD AND APPARATUS FOR EFFICIENT DC CALIBRATION IN A DIRECT-CONVERSION SYSTEM WITH VARIABLE DC GAIN 审中-公开
标题翻译：方法和设备高效DC校准具有可变直流增益直接转换方式
公开(公告)号：EP2206239A1
公开(公告)日：2010-07-14
申请号：EP08836510.1
申请日：2008-10-02
申请人： Maxlinear, Inc.
发明人： LING, Curtis , LO, Andy , SEDALO, Tete
IPC分类号： H04B1/06
CPC分类号： H04B1/16 , H04B1/40
摘要： A wireless communication receiver includes a multitude of look-up tables each storing a multitude of DC offset values associated with the gains of an amplification stage disposed in the wireless communication receiver. The entries for each look-up table are estimated during a stage of the calibration phase. During such a calibration stage, for each selected gain of an amplification stage, a search logic estimates a current DC offset number and compares it to a previous DC offset estimate that is fed back to the search logic. If the difference between the current and previous estimates is less than a predefined threshold value, the current estimate is treated as being associated with the DC offset of the selected gain of the amplification stage and is stored in the look-up table. This process is repeated for each selected gain of each amplification stage of interest until the look-up tables are populated.

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