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1. 发明授权

US09042463B2 Method and system for adaptive guard interval (GI) combining 有权
标题翻译：自适应保护间隔（GI）组合的方法和系统
公开(公告)号：US09042463B2
公开(公告)日：2015-05-26
申请号：US13351071
申请日：2012-01-16
申请人： Mingrui Zhu , Arun Kedambadi , Seung Chul Hong , Anand Anandakumar
发明人： Mingrui Zhu , Arun Kedambadi , Seung Chul Hong , Anand Anandakumar
IPC分类号： H04K1/10 , H04L27/28 , H04L25/02 , H04L27/26
CPC分类号： H04L27/2605 , H04L25/0216 , H04L25/0222 , H04L25/0226 , H04L27/2607 , H04L27/2647 , H04L27/2655
摘要： A method and system for combining a guard interval and a corresponding portion of a received symbol, whereby when receiving a signal that contains the symbol with a guard interval corresponding to the symbol, a portion of the guard interval that is free from inter-symbol interference may be extracted, and the extracted portion of the guard interval may be combined with the corresponding portion of the symbol. The extracting and combining may be done after a determining, based on a delay profile provided by the received signal, that a delay spread is smaller than a predetermined channel delay. The delay spread may be determined by filtering an instantaneous delay spread associated with the received signal. The filtering may be performed using a 1-tap infinite impulse response low-pass filter. The low-pass filter may include a time constant that is the inverse of a maximum Doppler frequency shift.
摘要翻译：一种用于组合保护间隔和接收到的符号的对应部分的方法和系统，由此当接收到包含具有与该符号对应的保护间隔的符号的信号时，保护间隔的一部分没有符号间干扰可以提取保护间隔的提取部分与符号的对应部分组合。在基于由接收信号提供的延迟分布确定延迟扩展小于预定信道延迟之后，可以进行提取和组合。可以通过对与接收信号相关联的瞬时延迟扩展进行滤波来确定延迟扩展。可以使用1抽头无限脉冲响应低通滤波器来执行滤波。低通滤波器可以包括与最大多普勒频移相反的时间常数。

2. 发明申请

US20120183107A1 METHOD AND SYSTEM FOR ADAPTIVE GUARD INTERVAL (GI) COMBINING 有权
标题翻译：自适应间隔（GI）组合的方法和系统
公开(公告)号：US20120183107A1
公开(公告)日：2012-07-19
申请号：US13351071
申请日：2012-01-16
申请人： Mingrui Zhu , Arun Kedambadi , Seung Chul Hong , Anand Anandakumar
发明人： Mingrui Zhu , Arun Kedambadi , Seung Chul Hong , Anand Anandakumar
IPC分类号： H04B15/00
CPC分类号： H04L27/2605 , H04L25/0216 , H04L25/0222 , H04L25/0226 , H04L27/2607 , H04L27/2647 , H04L27/2655
摘要： A method and system for combining a guard interval and a corresponding portion of a received symbol, whereby when receiving a signal that contains the symbol with a guard interval corresponding to the symbol, a portion of the guard interval that is free from inter-symbol interference may be extracted, and the extracted portion of the guard interval may be combined with the corresponding portion of the symbol. The extracting and combining may be done after a determining, based on a delay profile provided by the received signal, that a delay spread is smaller than a predetermined channel delay. The delay spread may be determined by filtering an instantaneous delay spread associated with the received signal. The filtering may be performed using a 1-tap infinite impulse response low-pass filter. The low-pass filter may include a time constant that is the inverse of a maximum Doppler frequency shift.
摘要翻译：一种用于组合保护间隔和接收到的符号的对应部分的方法和系统，由此当接收到包含具有与该符号对应的保护间隔的符号的信号时，保护间隔的一部分没有符号间干扰可以提取保护间隔的提取部分与符号的对应部分组合。在基于由接收信号提供的延迟分布确定延迟扩展小于预定信道延迟之后，可以进行提取和组合。可以通过对与接收信号相关联的瞬时延迟扩展进行滤波来确定延迟扩展。可以使用1抽头无限脉冲响应低通滤波器来执行滤波。低通滤波器可以包括与最大多普勒频移相反的时间常数。

3. 发明申请

US20140009318A1 METHOD AND SYSTEM FOR TIME INTERLEAVED ANALOG-TO-DIGITAL CONVERTER TIMING MISMATCH ESTIMATION AND COMPENSATION 有权
标题翻译：时间间隔模拟数字转换器时序误差估计与补偿的方法与系统
公开(公告)号：US20140009318A1
公开(公告)日：2014-01-09
申请号：US13936385
申请日：2013-07-08
申请人： Pawandeep Taluja , Mingrui Zhu , Xuefeng Chen , Anand Anandakumer , Sheng Ye , Timothy Leo Gallagher
发明人： Pawandeep Taluja , Mingrui Zhu , Xuefeng Chen , Anand Anandakumer , Sheng Ye , Timothy Leo Gallagher
IPC分类号： H03M1/50
CPC分类号： H03M1/0612 , H03M1/1009 , H03M1/1038 , H03M1/1215 , H03M1/50 , H04L7/0087 , H04L25/08 , H04W56/00
摘要： Methods and systems for time interleaved analog-to-digital converter timing mismatch calibration and compensation may comprise receiving an analog signal on a chip, converting the analog signal to a digital signal utilizing a time interleaved analog-to-digital-converter (ADC), and reducing a blocker signal that is generated by timing offsets in the time interleaved ADC by estimating complex coupling coefficients between a desired digital output signal and the blocker signal utilizing a decorrelation algorithm on frequencies within a desired frequency bandwidth. The decorrelation algorithm may comprise a symmetric adaptive decorrelation algorithm. The received analog signal may be generated by a calibration tone generator on the chip. An aliased signal may be summed with an output signal from a multiplier. The complex coupling coefficients may be determined utilizing the decorrelation algorithm on the summed signals. A multiplier may be configured to cancel the blocker signal utilizing the determined complex coupling coefficients.
摘要翻译：用于时间交织的模数转换器定时失配校准和补偿的方法和系统可以包括在芯片上接收模拟信号，利用时间交织的模数转换器（ADC）将模拟信号转换成数字信号，以及通过使用在期望频率带宽内的频率上的去相关算法来估计期望的数字输出信号和阻塞信号之间的复耦合系数来减少由时间交错ADC中的定时偏移产生的阻塞信号。解相关算法可以包括对称自适应去相关算法。所接收的模拟信号可以由芯片上的校准音发生器产生。混叠信号可以与来自乘法器的输出信号相加。复数耦合系数可以利用求和信号上的去相关算法来确定。乘法器可以被配置为利用所确定的复耦合系数来消除阻塞信号。

4. 发明授权

US08928507B2 Method and system for time interleaved analog-to-digital converter timing mismatch estimation and compensation 有权
标题翻译：时间交错模数转换器定时失配估计和补偿的方法和系统
公开(公告)号：US08928507B2
公开(公告)日：2015-01-06
申请号：US13936385
申请日：2013-07-08
申请人： Pawandeep Taluja , Mingrui Zhu , Xuefeng Chen , Anand Anandakumer , Sheng Ye , Timothy Leo Gallagher
发明人： Pawandeep Taluja , Mingrui Zhu , Xuefeng Chen , Anand Anandakumer , Sheng Ye , Timothy Leo Gallagher
IPC分类号： H03M1/06 , H03M1/50
CPC分类号： H03M1/0612 , H03M1/1009 , H03M1/1038 , H03M1/1215 , H03M1/50 , H04L7/0087 , H04L25/08 , H04W56/00
摘要： Methods and systems for time interleaved analog-to-digital converter timing mismatch calibration and compensation may include receiving an analog signal on a chip, converting the analog signal to a digital signal utilizing a time interleaved analog-to-digital-converter (ADC), and reducing a blocker signal that is generated by timing offsets in the time interleaved ADC by estimating complex coupling coefficients between a desired digital output signal and the blocker signal utilizing a decorrelation algorithm on frequencies within a desired frequency bandwidth. The decorrelation algorithm may include a symmetric adaptive decorrelation algorithm. The received analog signal may be generated by a calibration tone generator on the chip. An aliased signal may be summed with an output signal from a multiplier. The complex coupling coefficients may be determined utilizing the decorrelation algorithm on the summed signals. A multiplier may be configured to cancel the blocker signal utilizing the determined complex coupling coefficients.
摘要翻译：用于时间交织的模数转换器定时失配校准和补偿的方法和系统可以包括在芯片上接收模拟信号，使用时间交织的模数转换器（ADC）将模拟信号转换成数字信号，以及通过使用在期望频率带宽内的频率上的去相关算法来估计期望的数字输出信号和阻塞信号之间的复耦合系数来减少由时间交错ADC中的定时偏移产生的阻塞信号。解相关算法可以包括对称自适应去相关算法。所接收的模拟信号可以由芯片上的校准音发生器产生。混叠信号可以与来自乘法器的输出信号相加。复数耦合系数可以利用求和信号上的去相关算法来确定。乘法器可以被配置为利用所确定的复耦合系数来消除阻塞信号。

5. 发明授权

US08295380B2 Automatic gain control circuit for MIMO OFDM receiver 失效
标题翻译： MIMO OFDM接收机的自动增益控制电路
公开(公告)号：US08295380B2
公开(公告)日：2012-10-23
申请号：US12114929
申请日：2008-05-05
申请人： Mingrui Zhu , Gwang-Hyun Gho , Won-Joon Choi
发明人： Mingrui Zhu , Gwang-Hyun Gho , Won-Joon Choi
IPC分类号： H04B7/02
CPC分类号： H04L27/2647 , H03G3/3078
摘要： An automatic gain control (AGC) circuit and method for performing AGC for an orthogonal frequency-division multiplexing (OFDM) receiver measures signal power of input digital signals that are derived from incoming data frames with preambles to produce gain change signals when the signal power differs from a reference target power level. The gain of an amplifier of the OFDM receiver is changed in response to the gain change signals until a preamble of the data frames is detected for the first time. The gain of the amplifier of the OFDM receiver is further changed in response to the gain change signals, after the preamble is detected, only during periods when the preambles of the data frames are being processed by the OFDM receiver such that the gain of the amplifier is not changed during periods when other portions of the data frames are being processed by the OFDM receiver.
摘要翻译：用于对正交频分复用（OFDM）接收机执行AGC的自动增益控制（AGC）电路和方法测量输入数字信号的信号功率，该输入数字信号从具有前同步码的输入数据帧导出，以在信号功率不同时产生增益改变信号从参考目标功率水平。 OFDM接收机的放大器的增益响应于增益变化信号而改变，直到第一次检测到数据帧的前导码为止。 OFDM接收机的放大器的增益在检测到前导码之后响应于增益改变信号进一步改变，仅在OFDM接收器正在处理数据帧的前导码的时段期间，使得放大器的增益在数据帧的其他部分正在被OFDM接收机处理的期间不改变。

6. 发明申请

US20080273636A1 AUTOMATIC GAIN CONTROL CIRCUIT FOR MIMO OFDM RECEIVER 失效
标题翻译： MIMO OFDM接收机的自动增益控制电路
公开(公告)号：US20080273636A1
公开(公告)日：2008-11-06
申请号：US12114929
申请日：2008-05-05
申请人： Mingrui Zhu , Gwang-Hyun Gho , Won-Joon Choi
发明人： Mingrui Zhu , Gwang-Hyun Gho , Won-Joon Choi
IPC分类号： H04L27/08
CPC分类号： H04L27/2647 , H03G3/3078
摘要： An automatic gain control (AGC) circuit and method for performing AGC for an orthogonal frequency-division multiplexing (OFDM) receiver measures signal power of input digital signals that are derived from incoming data frames with preambles to produce gain change signals when the signal power differs from a reference target power level. The gain of an amplifier of the OFDM receiver is changed in response to the gain change signals until a preamble of the data frames is detected for the first time. The gain of the amplifier of the OFDM receiver is further changed in response to the gain change signals, after the preamble is detected, only during periods when the preambles of the data frames are being processed by the OFDM receiver such that the gain of the amplifier is not changed during periods when other portions of the data frames are being processed by the OFDM receiver.
摘要翻译：用于对正交频分复用（OFDM）接收机执行AGC的自动增益控制（AGC）电路和方法测量输入数字信号的信号功率，该输入数字信号从具有前同步码的输入数据帧导出，以在信号功率不同时产生增益改变信号从参考目标功率水平。 OFDM接收机的放大器的增益响应于增益变化信号而改变，直到第一次检测到数据帧的前导码为止。 OFDM接收机的放大器的增益在检测到前导码之后响应于增益改变信号进一步改变，仅在OFDM接收器正在处理数据帧的前导码的时段期间，使得放大器的增益在数据帧的其他部分正在被OFDM接收机处理的期间不改变。

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