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公开(公告)号：US20060245347A1
公开(公告)日：2006-11-02
申请号：US11119240
申请日：2005-04-29
申请人： Srikant Jayaraman , Hao Xu , June Namgoong , Michael Mangan , Peter Black
发明人： Srikant Jayaraman , Hao Xu , June Namgoong , Michael Mangan , Peter Black
IPC分类号： H04J11/00
CPC分类号： H04L27/2662 , H04L1/20 , H04L5/0048 , H04L27/2695 , H04L2001/0093
摘要： A spread-spectrum communication system provides an effective signal-to-noise ratio (SNR) of received orthogonal frequency division multiplex (OFDM) slots in the presence of timing errors. Effective SNR can serve as a diagnostic tool for determining whether there was a timing error when a measured packet error rate (PER) remains high, and a predicted PER from the effective SNR remains low. A loop can use the effective SNR to control a time reference used by an OFDM decoder.
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2.发明申请Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling 失效无线通信中的噪声方差估计用于分集组合和对数似然度比例公开(公告)号：US20060062322A1
公开(公告)日：2006-03-23
申请号：US11047347
申请日：2005-01-28
申请人： June Namgoong , Hao Xu , Peter Black , Srikant Jayaraman
发明人： June Namgoong , Hao Xu , Peter Black , Srikant Jayaraman
CPC分类号： H04L1/20 , H04B1/1027 , H04L27/2647
摘要： Noise variance estimation in wireless communications. Noise variance estimation includes receiving a signal including an OFDM symbol having, in-band tones including in-band pilot tones, and band-edge tones including band-edge pilot tones and guard tones, estimating an effective noise variance for the in-band tones using the in-band pilot tones and channel estimates for the in-band pilot tones, and estimating an effective noise variance for the band-edge tones using the band-edge pilot tones, channel estimates for the band-edge pilot tones, and the guard tones.
摘要翻译： 无线通信中的噪声方差估计。 噪声方差估计包括接收包括具有包括带内导频音频的带内音调和包括带边导频音和保护音的带边音调的OFDM符号的信号，估计带内音调的有效噪声方差 使用带内导频音调和频带内导频音调的估计，以及使用带边导频音估计带边音调的有效噪声方差，对带边导频音进行信道估计，以及 守卫色调。
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公开(公告)号：US20050276364A1
公开(公告)日：2005-12-15
申请号：US11102301
申请日：2005-04-08
申请人： Peter Black , Hao Xu , June Namgoong , Srikant Jayaraman
发明人： Peter Black , Hao Xu , June Namgoong , Srikant Jayaraman
CPC分类号： H04L25/0204 , H04L25/0216 , H04L25/0234
摘要： A pilot assisted channel estimation process. A receiver may be configured to estimate the impulse response of a channel from a signal having pilot tones and spread-spectrum pilot signals. The receiver estimates the response of the channel from the pilot tones, and adapts the length of delay the channel response is estimated based on the spread-spectrum pilot signals.
摘要翻译： 导频辅助信道估计过程。 接收机可以被配置为从具有导频音调和扩频导频信号的信号估计信道的脉冲响应。 接收机从导频音估计信道的响应，并根据扩频导频信号调整估计信道响应的延迟长度。
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4.发明授权Noise variance estimation in wireless communications for diversity combining and log likelihood scaling 有权用于分集组合和对数似然度比例的无线通信中的噪声方差估计公开(公告)号：US08126072B2
公开(公告)日：2012-02-28
申请号：US12491056
申请日：2009-06-24
申请人： June Namgoong , Hao Xu , Peter J. Black , Srikant Jayaraman
发明人： June Namgoong , Hao Xu , Peter J. Black , Srikant Jayaraman
IPC分类号： H04L27/28
CPC分类号： H04L1/20 , H04B1/1027 , H04L27/2647
摘要： The present patent application comprises a method and means for demodulating symbols, comprising converting an OFDM symbol from a time domain to a frequency domain, selecting pilot tones, making a soft decision based on received data, and estimating a channel frequency response. In another example, the method and means further comprises selecting guard tones. In another example, the method and means further comprises generating channel estimates for in-band and band-edge pilot tones.
摘要翻译： 本专利申请包括用于解调符号的方法和装置，包括将OFDM符号从时域转换到频域，选择导频音，基于接收到的数据进行软判决，以及估计信道频率响应。 在另一示例中，该方法和装置还包括选择保护音。 在另一示例中，该方法和装置还包括生成带内和带边导频音调的信道估计。
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5.发明授权公开(公告)号：US07564775B2
公开(公告)日：2009-07-21
申请号：US11119240
申请日：2005-04-29
IPC分类号： H04J11/00
CPC分类号： H04L27/2662 , H04L1/20 , H04L5/0048 , H04L27/2695 , H04L2001/0093
摘要： A spread-spectrum communication system provides an effective signal-to-noise ratio (SNR) of received orthogonal frequency division multiplex (OFDM) slots in the presence of timing errors. Effective SNR can serve as a diagnostic tool for determining whether there was a timing error when a measured packet error rate (PER) remains high, and a predicted PER from the effective SNR remains low. A loop can use the effective SNR to control a time reference used by an OFDM decoder.
摘要翻译： 在存在定时误差的情况下，扩频通信系统提供接收到的正交频分复用（OFDM）时隙的有效信噪比（SNR）。 当测量的分组错误率（PER）保持为高时，有效SNR可以用作确定是否存在定时误差的诊断工具，并且来自有效SNR的预测的PER保持为低。 循环可以使用有效SNR来控制OFDM解码器使用的时间参考。
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6.发明授权Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling 失效无线通信中的噪声方差估计用于分集组合和对数似然度比例公开(公告)号：US07672383B2
公开(公告)日：2010-03-02
申请号：US11047347
申请日：2005-01-28
申请人： June Namgoong , Hao Xu , Peter J. Black , Srikant Jayaraman
发明人： June Namgoong , Hao Xu , Peter J. Black , Srikant Jayaraman
IPC分类号： H04L27/28
CPC分类号： H04L1/20 , H04B1/1027 , H04L27/2647
摘要： Noise variance estimation in wireless communications. Noise variance estimation includes receiving a signal including an OFDM symbol having, in-band tones including in-band pilot tones, and band-edge tones including band-edge pilot tones and guard tones, estimating an effective noise variance for the in-band tones using the in-band pilot tones and channel estimates for the in-band pilot tones, and estimating an effective noise variance for the band-edge tones using the band-edge pilot tones, channel estimates for the band-edge pilot tones, and the guard tones.
摘要翻译： 无线通信中的噪声方差估计。 噪声方差估计包括接收包括具有包括带内导频音频的带内音调和包括带边导频音和保护音的带边音调的OFDM符号的信号，估计带内音调的有效噪声方差 使用带内导频音调和频带内导频音调的估计，以及使用带边导频音估计带边音调的有效噪声方差，对带边导频音进行信道估计，以及 守卫色调。
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公开(公告)号：US07149264B2
公开(公告)日：2006-12-12
申请号：US11102301
申请日：2005-04-08
申请人： Peter J. Black , Hao Xu , June Namgoong , Srikant Jayaraman
发明人： Peter J. Black , Hao Xu , June Namgoong , Srikant Jayaraman
IPC分类号： H04B1/10
CPC分类号： H04L25/0204 , H04L25/0216 , H04L25/0234
摘要： A pilot assisted channel estimation process. A receiver may be configured to estimate the impulse response of a channel from a signal having pilot tones and spread-spectrum pilot signals. The receiver estimates the response of the channel from the pilot tones, and adapts the length of delay the channel response is estimated based on the spread-spectrum pilot signals.
摘要翻译： 导频辅助信道估计过程。 接收机可以被配置为从具有导频音调和扩频导频信号的信号估计信道的脉冲响应。 接收机从导频音估计信道的响应，并根据扩频导频信号调整估计信道响应的延迟长度。
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8.发明申请Noise Variance Estimation In Wireless Communications For Diversity Combining and Log Likelihood Scaling 有权无线通信中的噪声方差估计用于分集组合和对数似然比公开(公告)号：US20100054371A1
公开(公告)日：2010-03-04
申请号：US12491056
申请日：2009-06-24
申请人： Jun Namgoong , Hao Xu , Peter J. Black , Srikant Jayaraman
发明人： Jun Namgoong , Hao Xu , Peter J. Black , Srikant Jayaraman
IPC分类号： H04L27/06
CPC分类号： H04L1/20 , H04B1/1027 , H04L27/2647
摘要： The present patent application comprises a method and means for demodulating symbols, comprising converting an OFDM symbol from a time domain to a frequency domain, selecting pilot tones, making a soft decision based on received data, and estimating a channel frequency response. In another example, the method and means further comprises selecting guard tones. In another example, the method and means further comprises generating channel estimates for in-band and band-edge pilot tones.
摘要翻译： 本专利申请包括用于解调符号的方法和装置，包括将OFDM符号从时域转换到频域，选择导频音，基于接收到的数据进行软判决，以及估计信道频率响应。 在另一示例中，该方法和装置还包括选择保护音。 在另一示例中，该方法和装置还包括生成带内和带边导频音调的信道估计。
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公开(公告)号：US11954120B2
公开(公告)日：2024-04-09
申请号：US17896316
申请日：2022-08-26
申请人： Hao Xu
发明人： Hao Xu
IPC分类号： G06F16/22 , G06F16/27 , G06F16/332 , G06F16/901 , G06Q20/38 , G06Q20/40
CPC分类号： G06F16/27 , G06F16/2246 , G06F16/3329 , G06F16/9024 , G06Q20/382 , G06Q20/3827 , G06Q20/401
摘要： The present invention is a system and method for recording right transfer in blockchain. There are three types of tokens, each of which may include a definition of rights. The rights can also be split or merged during circulation of tokens. The blockchain system ensures totality of rights does not increase nor decrease before and after circulation.
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公开(公告)号：US11179607B1
公开(公告)日：2021-11-23
申请号：US17235897
申请日：2021-04-20
发明人： Hao Xu , Jiashun He , Jiang Liu , Yifei Xu , Fusheng Pan
摘要： The present invention relates to a ball picking robot, comprising a walking mechanism, a ball picking mechanism, a ball pushing mechanism and a ball storage mechanism. The ball picking mechanism comprises a ball picking basket, an air cylinder used for driving the ball picking basket to move up and down, an air storage tank used for providing an air source for the air cylinder, a solenoid valve arranged at the air outlet of the air storage tank, a micro air pump connected to the air storage tank, and a shielding assembly arranged at an opening in the rear end of the ball picking basket. A first gear is mounted at the input end of the micro air pump. The ball pushing mechanism comprises a rotary ball discharging assembly, comprising an either-rotation motor, a rotary impeller connected to a first output shaft of the either-rotation motor through a belt assembly.
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