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公开(公告)号：US07672396B2
公开(公告)日：2010-03-02
申请号：US11472973
申请日：2006-06-22
申请人： Adam L. Schwartz , Sujai Chari
发明人： Adam L. Schwartz , Sujai Chari
IPC分类号： H04L25/49
CPC分类号： H03D3/009 , H03C2200/0058 , H04L27/2627 , H04L27/364
摘要： Methods of reducing spectral leakage due to I-Q imbalance within a transmitter are disclosed. The method includes the transmitter receiving a data stream of coefficients of a multi-carrier modulation signal. The data stream is pre-processed by processing a set of the coefficients that correspond with selected notch frequencies to reduce the effects of I-Q imbalance of the transmitter, wherein at least a portion of the set of coefficients corresponds to non-symmetrical notch frequencies. The pre-processed data stream is multi-carrier modulated. The multi-carrier modulated pre-processed data stream is I-Q modulated before transmission.
摘要翻译： 公开了减少由于发射机内的I-Q不平衡引起的频谱泄漏的方法。 该方法包括发射机接收多载波调制信号的系数的数据流。 通过处理与所选择的陷波频率相对应的一组系数来预处理数据流，以减少发射机的I-Q不平衡的影响，其中该组系数的至少一部分对应于非对称陷波频率。 预处理的数据流是多载波调制的。 多载波调制预处理数据流在传输之前进行I-Q调制。
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公开(公告)号：US20090103591A1
公开(公告)日：2009-04-23
申请号：US11982965
申请日：2007-11-06
IPC分类号： H04B1/713
CPC分类号： H04B1/715 , H04B1/7143 , H04B2001/7154
摘要： Methods and systems of frequency hopping communication are disclosed. One method includes a receiver obtaining a frequency hopping sequence, wherein the frequency hopping sequence defines a time sequence of reception through each of a plurality of frequency hopping bands. For each of the plurality of frequency hopping bands, the receiver estimates an interference level and assigns a band weight to the frequency hopping band based on the estimated interference level. The receiver receives a signal that includes symbols occupying the plurality of frequency hopping bands according to the frequency hopping sequence, and demodulates the symbols producing a stream of estimated bit values and corresponding bit value confidence levels. The bit value confidence levels of each of the estimated bit values are adjusted according to the band weight of a corresponding frequency hopping band.
摘要翻译： 公开了跳频通信的方法和系统。 一种方法包括获得跳频序列的接收机，其中跳频序列通过多个跳频频带中的每一个定义接收的时间序列。 对于多个跳频频带中的每一个，接收机估计干扰电平，并且基于所估计的干扰电平为跳频带分配频带权重。 接收机根据跳频序列接收包括占用多个跳频频带的符号的信号，并解调产生估计比特值流和对应比特值置信水平的符号。 每个估计位值的位值置信水平根据对应跳频带的带宽进行调整。
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公开(公告)号：US20070297532A1
公开(公告)日：2007-12-27
申请号：US11472973
申请日：2006-06-22
申请人： Adam L. Schwartz , Sujai Chari
发明人： Adam L. Schwartz , Sujai Chari
IPC分类号： H04L27/20
CPC分类号： H03D3/009 , H03C2200/0058 , H04L27/2627 , H04L27/364
摘要： Methods of reducing spectral leakage due to I-Q imbalance within a transmitter are disclosed. The method includes the transmitter receiving a data stream of coefficients of a multi-carrier modulation signal. The data stream is pre-processed by processing a set of the coefficients that correspond with selected notch frequencies to reduce the effects of I-Q imbalance of the transmitter, wherein at least a portion of the set of coefficients corresponds to non-symmetrical notch frequencies. The pre-processed data stream is multi-carrier modulated. The multi-carrier modulated pre-processed data stream is I-Q modulated before transmission.
摘要翻译： 公开了减少由于发射机内的I-Q不平衡引起的频谱泄漏的方法。 该方法包括发射机接收多载波调制信号的系数的数据流。 通过处理与所选择的陷波频率相对应的一组系数来预处理数据流，以减少发射机的I-Q不平衡的影响，其中该组系数的至少一部分对应于非对称陷波频率。 预处理的数据流是多载波调制的。 多载波调制预处理数据流在传输之前进行I-Q调制。
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公开(公告)号：US08942317B2
公开(公告)日：2015-01-27
申请号：US13543481
申请日：2012-07-06
申请人： Sujai Chari
发明人： Sujai Chari
CPC分类号： H04L27/2657 , H04L7/042 , H04L27/0014 , H04L2027/003 , H04L2027/0048 , H04L2027/0095
摘要： Apparatuses, methods and systems for mitigating carrier offset of a received signal are disclosed. One embodiment of a receiver includes a receiver chain operative to receive a communication signal from a desired transmitter, and a controller operative to determine a carrier offset correction based on prior reception of communication signals from the desired transmitter. The receiver chain is operative to generate a carrier offset corrected received signal by applying the carrier offset correction to the received communication signal, and a correlation processor operative to correlate the carrier offset corrected received communication signal with a known sequence.
摘要翻译： 公开了用于减轻接收信号的载波偏移的装置，方法和系统。 接收机的一个实施例包括可操作以从期望的发射机接收通信信号的接收机链路，以及控制器，用于根据来自所需发射机的通信信号的先前接收来确定载波偏移校正。 接收器链可操作以通过对所接收的通信信号应用载波偏移校正来产生载波偏移校正的接收信号，以及相关处理器，用于将载波偏移校正的接收通信信号与已知序列进行相关。
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公开(公告)号：US07978748B2
公开(公告)日：2011-07-12
申请号：US12001339
申请日：2007-12-11
申请人： Daryl Arnold Kaiser , Sujai Chari
发明人： Daryl Arnold Kaiser , Sujai Chari
IPC分类号： H04B1/73
CPC分类号： H04B1/7156 , H04B2001/71563 , H04L5/0023 , H04L5/0037 , Y10T137/7838 , Y10T137/7904
摘要： Methods and systems of a receiver selecting a subset of plurality of frequency hopping bands for synchronization of the receiver are disclosed. One method includes the receiver determining a receive signal quality metric for each band of the plurality of frequency hopping bands, and selecting at least one synchronization band as a subset of the plurality of frequency hopping bands for synchronization based on the receive signal quality metric of each of the plurality of frequency hopping bands.
摘要翻译： 公开了接收机选择用于接收机同步的多个跳频频带的子集的接收机的方法和系统。 一种方法包括接收机确定多个跳频频带中的每个频带的接收信号质量度量，并且基于每个频带的接收信号质量度量，选择至少一个同步频带作为用于同步的多个跳频频带的子集 的多个跳频带。
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公开(公告)号：US20100098047A1
公开(公告)日：2010-04-22
申请号：US12288504
申请日：2008-10-21
申请人： Xiaoming Zhou , Patrick Worfolk , Sujai Chari
发明人： Xiaoming Zhou , Patrick Worfolk , Sujai Chari
IPC分类号： H04J3/00
摘要： Embodiments for setting a data rate of encoded data of a transmitter are disclosed. One method includes determining a physical layer transmission rate based on a transmission link quality of a link, estimating a transmission throughput that can be transmitted over the link ensuring a level of Quality of Service (QOS) requirement, and the transmitter adjusting the data rate of the encoded data based on the estimated transmission throughput.
摘要翻译： 公开了用于设置发射机的编码数据的数据速率的实施例。 一种方法包括基于链路的传输链路质量确定物理层传输速率，估计可以通过链路传输的传输吞吐量，确保服务质量（QOS）要求的水平，并且发射机调整数据速率 基于所估计的传输吞吐量的编码数据。
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公开(公告)号：US08737545B2
公开(公告)日：2014-05-27
申请号：US13326248
申请日：2011-12-14
申请人： Sujai Chari , Ssu-Pin Ma
发明人： Sujai Chari , Ssu-Pin Ma
IPC分类号： H04L27/08
CPC分类号： H03G3/3068 , H04B2001/1054
摘要： Apparatuses, methods and systems of selecting a gain setting of a receiver chain are disclosed. One method includes bypassing a filter portion of the receiver chain and sampling a bypass receive signal while the filter portion of the receiver chain is bypassed. If the sampled bypass receive signal is determined to be saturated greater than a threshold, then selecting a gain setting of the receive chain as a function of the saturation. Further, the filter portion of the receive chain is included while sampling a receive signal with the selected gain setting.
摘要翻译： 公开了选择接收机链的增益设置的设备，方法和系统。 一种方法包括绕过接收器链的滤波器部分并对旁路接收信号进行采样，同时接收器链的滤波器部分被旁路。 如果采样旁路接收信号被确定为饱和大于阈值，则选择接收链的增益设置作为饱和度的函数。 此外，包括接收链的滤波器部分，同时采用所选择的增益设置对接收信号进行采样。
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公开(公告)号：US08693561B2
公开(公告)日：2014-04-08
申请号：US13423113
申请日：2012-03-16
CPC分类号： H04L25/0204 , H04L25/03292 , H04L27/2647 , H04L2025/03414 , H04L2025/03426 , H04L2025/03726
摘要： Apparatuses, methods and systems of receive signal detection of a multi-carrier signal are disclosed. One method includes receiving a multi-carrier signal, determining a characteristic of each sub-carrier of the multi-carrier signal, and selecting a one of a plurality of receive signal detection techniques for each sub-carrier of the multi-carrier signal based on the determined characteristic of the sub-carrier.
摘要翻译： 公开了多载波信号的接收信号检测的装置，方法和系统。 一种方法包括接收多载波信号，确定多载波信号的每个子载波的特性，以及基于多载波信号的每个子载波选择多个接收信号检测技术中的一个，基于 所确定的子载波的特性。
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公开(公告)号：US20140010326A1
公开(公告)日：2014-01-09
申请号：US13543481
申请日：2012-07-06
申请人： Sujai Chari
发明人： Sujai Chari
CPC分类号： H04L27/2657 , H04L7/042 , H04L27/0014 , H04L2027/003 , H04L2027/0048 , H04L2027/0095
摘要： Apparatuses, methods and systems for mitigating carrier offset of a received signal are disclosed. One embodiment of a receiver includes a receiver chain operative to receive a communication signal from a desired transmitter, and a controller operative to determine a carrier offset correction based on prior reception of communication signals from the desired transmitter. The receiver chain is operative to generate a carrier offset corrected received signal by applying the carrier offset correction to the received communication signal, and a correlation processor operative to correlate the carrier offset corrected received communication signal with a known sequence.
摘要翻译： 公开了用于减轻接收信号的载波偏移的装置，方法和系统。 接收机的一个实施例包括可操作以从期望的发射机接收通信信号的接收机链路，以及控制器，用于根据来自所需发射机的通信信号的先前接收来确定载波偏移校正。 接收器链可操作以通过对所接收的通信信号应用载波偏移校正来产生载波偏移校正的接收信号，以及相关处理器，用于将载波偏移校正的接收通信信号与已知序列进行相关。
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公开(公告)号：US07965787B2
公开(公告)日：2011-06-21
申请号：US12217974
申请日：2008-07-10
申请人： Sujai Chari
发明人： Sujai Chari
CPC分类号： H04L1/0036 , H04B1/7156 , H04B1/7183 , H04B7/084 , H04B7/0871 , H04B2001/71563 , H04L1/06
摘要： Methods and systems of receiving wireless signals are disclosed. One method includes a receiver characterizing signal quality parameters of receive signals for a plurality of receive diversity settings. The receiver selects a first receive diversity setting for synchronizing the receiver with the receive signal based on the characterized signal quality parameters. The receiver selects a second receive diversity setting for receiving data with the receive signal based on the characterized signal quality parameters.
摘要翻译： 公开了接收无线信号的方法和系统。 一种方法包括表征多个接收分集设置的接收信号的信号质量参数的接收机。 接收机基于所表征的信号质量参数选择用于使接收机与接收信号同步的第一接收分集设置。 接收机基于所表征的信号质量参数选择用接收信号接收数据的第二接收分集设置。
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