公开(公告)号：US06549594B1

公开(公告)日：2003-04-15

申请号：US09329365

申请日：1999-06-10

申请人： Xixian Chen ,  Song Zhang ,  Shiquan Wu

发明人： Xixian Chen ,  Song Zhang ,  Shiquan Wu

IPC分类号： H04L700

CPC分类号： H04L25/0202

摘要： A method for timing phase recovery including the steps of first, estimating an open-eye sequence of a received signal, second, estimating a channel response using the open-eye sequence, and third, correlating the estimated channel response with an ideal channel response to determine the peak correlation location. The peak correlation location corresponds to the recovered timing phase. A system including means for estimating an open-eye sequence of a received signal, a channel estimator and a correlator is also provided. The channel estimator is used for estimating a channel response using the open-eye sequence and the received signal. The correlator is used for correlating the estimated channel response with an ideal channel response to determine the peak correlation location, the peak correlation location corresponding to the recovered timing phase.

摘要翻译： 一种用于定时相位恢复的方法，包括以下步骤：首先估计接收信号的睁眼序列，其次，使用睁眼序列估计信道响应，以及第三，将所估计的信道响应与理想信道响应相关联 确定峰值相关位置。 峰值相关位置对应于恢复的定时相位。 还提供了一种包括用于估计接收信号的睁眼序列的装置，信道估计器和相关器的系统。 信道估计器用于使用睁眼序列和接收信号来估计信道响应。 相关器用于将估计的信道响应与理想信道响应相关以确定峰值相关位置，对应于恢复的定时相位的峰值相关位置。

公开(公告)号：US06510186B1

公开(公告)日：2003-01-21

申请号：US09321818

申请日：1999-05-28

申请人： Xixian Chen ,  Song Zhang ,  Shiquan Wu

发明人： Xixian Chen ,  Song Zhang ,  Shiquan Wu

IPC分类号： H04L2706

CPC分类号： H04L25/0202

摘要： A time delay estimation method including the steps of first, estimating a channel response from a received signal, and second, determining a time delay estimate by correlating the estimated channel response with an ideal channel response. Further, a system including a channel estimator and a correlator is provided. The channel estimator is used for estimating a channel response from a received signal and the correlator is used for estimating a time delay using the channel response and an ideal channel response.

摘要翻译： 一种时间延迟估计方法，包括以下步骤：首先，从接收信号估计信道响应，其次，通过将所估计的信道响应与理想信道响应相关来确定时延估计。此外，包括信道估计器和 提供相关器。 信道估计器用于从接收信号估计信道响应，并且相关器用于使用信道响应和理想信道响应来估计时间延迟。

公开(公告)号：US06353744B1

公开(公告)日：2002-03-05

申请号：US09374103

申请日：1999-08-16

申请人： Shiquan Wu ,  Song Zhang ,  Xixian Chen

发明人： Shiquan Wu ,  Song Zhang ,  Xixian Chen

IPC分类号： H04Q720

CPC分类号： H04W64/00 ,  G01S5/10

摘要： The invention is directed to positioning with low geometrical dilution of position (GDOP). Generally, the invention is a method for positioning including the steps of transmitting a asynchronous signal from a mobile to at least one base station; receiving the asynchronous signal at each base station; for each base station, determining a spherical line of position for the mobile using the received non-synchronous signal; and positioning the mobile using the spherical lines of position. The invention is a position location system which has the merits of both spherical and hyperbolic positioning systems while avoiding their drawbacks. The invention is less sensitive to GDOP and the mathematical model is easier to handle than the known hyperbolic system. The mathematical model embodied in the invention is equivalent to a convex quadratic probing subject to an ice-cream cone constraint. The invention also embodies an efficient algorithm for this optimization model. The invention is primarily directed to position location for E911, it can also applied to any other fields where position location is used, such as, but not limited to, radar positioning, satellite positioning and navigation systems.

摘要翻译： 本发明涉及用几何稀释几何位置（GDOP）进行定位。 通常，本发明是一种定位方法，包括以下步骤：从移动站向至少一个基站发送异步信号; 在每个基站接收异步信号; 对于每个基站，使用所接收的非同步信号确定移动站的球面行位线; 并使用球面线定位移动设备。 本发明是位置定位系统，其具有球面和双曲线定位系统的优点，同时避免了它们的缺点。 本发明对GDOP较不敏感，并且数学模型比已知的双曲线系统更容易处理。 本发明中体现的数学模型等同于经受冰淇淋锥限制的凸二次探测。 本发明还体现了该优化模型的有效算法。 本发明主要涉及用于E911的位置定位，它还可以应用于使用位置定位的任何其它领域，例如但不限于雷达定位，卫星定位和导航系统。

公开(公告)号：US06493380B1

公开(公告)日：2002-12-10

申请号：US09321819

申请日：1999-05-28

申请人： Shiquan Wu ,  Song Zhang ,  Xixian Chen

发明人： Shiquan Wu ,  Song Zhang ,  Xixian Chen

IPC分类号： H04B726

CPC分类号： G01S5/0215 ,  G01S5/02 ,  G01S5/06 ,  H04B7/005 ,  H04L25/0234

摘要： A method for estimating a time delay including the steps of first, estimating a channel spectrum from a received signal and a known reference signal, second, extracting a virtual array structure from the estimated channel spectrum, and third, determining the signal time delay using the virtual array structure. Further, a system for estimating a time delay including a channel spectrum estimator, means for extracting a virtual array structure and means for determining the time delay is provided. The channel spectrum estimator is used for estimating a channel spectrum from a received signal and a known reference signal. The means for extracting a virtual array structure uses the estimated channel spectrum. The means for determining the time delay uses the virtual array structure.

摘要翻译： 一种用于估计时间延迟的方法，包括首先从接收信号估计信道频谱和已知参考信号的步骤，其次，从所估计的信道频谱中提取虚拟阵列结构，以及第三，使用 虚拟阵列结构。 此外，提供了一种用于估计包括信道频谱估计器，用于提取虚拟阵列结构的装置和用于确定时间延迟的装置的时间延迟的系统。 信道频谱估计器用于从接收信号和已知参考信号估计信道频谱。 用于提取虚拟阵列结构的装置使用估计的信道频谱。 用于确定时间延迟的方法使用虚拟阵列结构。

公开(公告)号：US06704300B1

公开(公告)日：2004-03-09

申请号：US09374000

申请日：1999-08-16

申请人： Xixian Chen ,  Song Zhang ,  Shiquan Wu

发明人： Xixian Chen ,  Song Zhang ,  Shiquan Wu

IPC分类号： H04J306

CPC分类号： H04J3/0697 ,  G01S5/12 ,  H04L7/042

摘要： The invention is directed to a method and system for acquisition of a time stamped signal burst while preserving timing information. A system for acquisition of a time stamped signal burst while preserving timing information. The system includes a first framer, an offset frequency compensator and a second framer. The first framer is for framing a buffered signal burst using least mean squares tuning to produce a first time stamp. The offset frequency compensator is for substantially removing a frequency offset from the first time stamp to produce a rough signal burst. The second framer is for framing the rough signal burst using least mean squares tuning to produce a fine signal burst arid a second time stamp, the second time stamp being more reliable than the first time stamp. A method system or acquisition of a time stamped signal burst while preserving timing information including the steps of framing using LMS and compensating for frequency offset. An advantage of the invention is increased reliability of the time stamp of the acquired signal burst.

摘要翻译： 本发明涉及一种用于在保留定时信息的同时采集时间戳信号脉冲串的方法和系统。 一种用于获取时间戳信号脉冲串同时保持定时信息的系统。 该系统包括第一成帧器，偏移频率补偿器和第二成帧器。 第一个成帧器用于使用最小均方调整来构建缓冲的信号突发以产生第一时间戳。 偏移频率补偿器用于基本上从第一时间戳移除频率偏移以产生粗略的信号脉冲串。 第二成帧器用于使用最小均方调整来构图粗略信号突发以产生精细信号脉冲串和第二时间戳，第二时间戳比第一时间戳更可靠。 一种方法系统或时间戳信号脉冲串的采集，同时保持定时信息，包括使用LMS进行成帧和补偿频率偏移的步骤。 本发明的一个优点是增加了获取的信号脉冲串的时间戳的可靠性。

公开(公告)号：US08884819B2

公开(公告)日：2014-11-11

申请号：US13137548

申请日：2011-08-25

申请人： Shiquan Wu

发明人： Shiquan Wu

IPC分类号： H04B7/00 ,  G01S5/04 ,  H04B7/06

CPC分类号： H04B7/0602

摘要： This invention discloses directional antenna systems, antenna combining and transmission antenna selection mechanism for wireless communication terminals such mobile handsets, mobile embedded laptops, mobile CPEs (Customer premises equipment), nomadic wireless CPEs, fixed wireless terminals and etc. The disclosed systems and methods only require analog circuitry and compass readings therefore are easy to implement and well fit into the current wireless terminals architectures. The inventive systems and methods resolve the problem that a directional antenna may not receive properly when user turn around and the antenna direction is deviated from transmitter; the inventive systems and methods further reduce the interference caused by omni antenna systems by selecting a directional antenna for transmit.

摘要翻译： 本发明公开了用于无线通信终端的定向天线系统，天线组合和发射天线选择机制，例如移动手机，移动嵌入式笔记本电脑，移动CPE（客户驻地设备），游牧无线CPE，固定无线终端等。仅公开的系统和方法 因此，需要模拟电路和罗盘读数容易实现，并且很适合当前的无线终端架构。 本发明的系统和方法解决了当用户转向并且天线方向偏离发射机时定向天线可能不能正确接收的问题; 本发明的系统和方法通过选择用于传输的定向天线来进一步减少由全向天线系统引起的干扰。

公开(公告)号：US08792589B2

公开(公告)日：2014-07-29

申请号：US12779782

申请日：2010-05-13

申请人： Shiquan Wu ,  Vajira Samarasooriya

发明人： Shiquan Wu ,  Vajira Samarasooriya

IPC分类号： H04N5/455

CPC分类号： H04N17/004 ,  H03J1/0091 ,  H04B1/76 ,  H04H60/41 ,  H04H60/43 ,  H04N5/50

摘要： A wireless microphone system broadcasts a pilot tone at the designated ATSC pilot position in the TV Band channel being used by the wireless microphone system. The pilot tone is a readily detectable waveform transmitted in the ATSC pilot position. The pilot tone can be generated by any one of: a standalone pilot tone generator; a pilot tone generator incorporated into a wireless microphone receiver; or, a pilot tone generator incorporated into a wireless microphone.

摘要翻译： 无线麦克风系统在由无线麦克风系统使用的TV频道信道中的指定ATSC导频位置广播导频音。 导频音是在ATSC导频位置发送的易于检测的波形。 导频音可以由以下任何一种产生：独立导频音发生器; 并入无线麦克风接收机的导频音发生器; 或者组合到无线麦克风中的导频音发生器。

公开(公告)号：US08350970B2

公开(公告)日：2013-01-08

申请号：US12571153

申请日：2009-09-30

申请人： Neil Birkett ,  Shiquan Wu

发明人： Neil Birkett ,  Shiquan Wu

IPC分类号： H04N5/50 ,  H04N17/02 ,  H04B1/18 ,  H04B1/04 ,  G06F3/033

CPC分类号： H04H40/18 ,  H04B1/0064 ,  H04H2201/60 ,  H04L25/0278 ,  H04N21/4263 ,  H04N21/6112

摘要： A radio frequency front end for a television band receiver and spectrum sensor includes a first plurality of adaptive matching networks connected to a signal summer that combines signals received by the first plurality of antennas respectively connected to the first plurality of adaptive matching networks and outputs a combined signal to each of a second plurality of downconverter/tuners. The downconverter/tuners are respectively or collectively connected to an analog to digital converter that converts output of the second plurality of downconverter/tuners into at least one digital signal that is output to the television band receiver and spectrum sensor.

摘要翻译： 用于电视频带接收机和频谱传感器的射频前端包括连接到信号加法器的第一多个自适应匹配网络，其组合由分别连接到第一多个自适应匹配网络的第一多个天线接收的信号，并输出组合 信号到第二多个下变频器/调谐器中的每一个。 下变频器/调谐器分别或共同地连接到模数转换器，其将第二多个下变频器/调谐器的输出转换成输出到电视频带接收机和频谱传感器的至少一个数字信号。

公开(公告)号：US08264996B2

公开(公告)日：2012-09-11

申请号：US12684540

申请日：2010-01-08

申请人： Shiquan Wu ,  Wen Tong ,  Claude Royer ,  Edward Sich

发明人： Shiquan Wu ,  Wen Tong ,  Claude Royer ,  Edward Sich

IPC分类号： G08C17/00

CPC分类号： H04W52/0216 ,  H04B1/7103 ,  H04B2201/70714 ,  H04L5/0016 ,  H04L27/2618 ,  H04L27/2647 ,  H04L27/265 ,  H04W52/0229 ,  Y02D70/122 ,  Y02D70/1242

摘要： Wireless devices, transmitters, systems and methods are provided that have a narrow band signalling channel and a wide band channel, for example an OFDM channel. In order to save power, the wireless device is nominally powered down with the exception of a receiver specific to the narrow band signalling channel. Once instructed to do so over the narrow band signalling channel, the wireless device wakes up the rest of its wide band receive circuitry.

摘要翻译： 提供了具有窄带信令信道和宽带信道（例如OFDM信道）的无线设备，发射机，系统和方法。 为了节省电力，除了窄带信令信道专用的接收机之外，无线设备名义上关闭电源。 一旦通过窄带信令信道指示这样做，无线设备唤醒其宽带接收电路的其余部分。

公开(公告)号：US20120052821A1

公开(公告)日：2012-03-01

申请号：US13137465

申请日：2011-08-18

申请人： Dongxun Jia ,  Shiquan Wu

发明人： Dongxun Jia ,  Shiquan Wu

IPC分类号： H04B1/38

CPC分类号： H04B1/126 ,  H04B7/0825 ,  H04B7/0828 ,  H04B7/0857

摘要： This is invention discloses a perturbation antenna system for wireless communication terminals such mobile handsets, mobile embedded laptops, mobile CPEs (Customer premises equipment), nomadic wireless CPEs, fixed wireless terminals and etc. The perturbation antenna output is analogically combined with that of the primary antenna. The combined result is to re-create the antenna pattern shape and its direction pointing in order to achieve gains by user intercept. A variable delay circuitry is equipped to the perturbation antenna therefore the user's interception can be enforced via programmable apparatus either by manually or by digital inputs. The user can tune the delay parameters meanwhile observe the antenna pattern changes and the call quality until satisfaction.

摘要翻译： 本发明公开了一种用于诸如移动手机，移动嵌入式笔记本电脑，移动CPE（客户驻地设备），游牧无线CPE，固定无线终端等的无线通信终端的扰动天线系统。扰动天线输出与主要天线输出类似地组合 天线。 组合的结果是重新创建天线图案形状及其方向指向，以便通过用户截取实现增益。 可变延迟电路被配置到扰动天线，因此可以通过手动或数字输入通过可编程设备实施用户的截取。 用户可以调整延迟参数，同时观察天线方向的变化和通话质量，直到满意。