公开(公告)号：US07636060B2

公开(公告)日：2009-12-22

申请号：US11620303

申请日：2007-01-05

申请人： Kuan-i Li ,  Kung-shuan Huang ,  Kun-tso Chen

发明人： Kuan-i Li ,  Kung-shuan Huang ,  Kun-tso Chen

IPC分类号： G01S1/00

CPC分类号： H04L1/08 ,  G01S19/24

摘要： A method and apparatus for collecting subframes of navigation data of satellites are disclosed. In the method of the present invention, the subframe is divided into several sub-units, each sub-units includes one or more words. When a receiver receives a subframe with a subframe ID, the respective required sub-units of the subframe are checked. A dummy sub-unit is not necessary to be considered. Valid ones of the required sub-units are collected. If not all the required sub-units of the subframe have been collected, the absent sub-units are to be collected when the next subframe with the same subframe ID is received. Some protection schemes can be applied to raise the reliability of such sub-unit collection. Especially when the signal is weak or unstable, the present invention may significantly improve the TTFF (Time To First Fix) performance of the receiver.

摘要翻译： 公开了一种收集卫星导航数据子帧的方法和装置。 在本发明的方法中，子帧被分成若干子单元，每个子单元包括一个或多个单词。 当接收器接收到具有子帧ID的子帧时，检查子帧的各个所要求的子单元。 虚拟子单元不需要考虑。 收集有效的所需子单位。 如果不是所有子帧的所有子单元被收集，则当接收到具有相同子帧ID的下一个子帧时，将不存在缺少的子单元。 可以采用一些保护方案来提高这种子单元收集的可靠性。 特别是当信号较弱或不稳定时，本发明可以显着改善接收机的TTFF（首次修复时间）性能。

公开(公告)号：US20080037687A1

公开(公告)日：2008-02-14

申请号：US11464089

申请日：2006-08-11

申请人： Kuan-i Li ,  Jui-Ming Wei ,  Chun-nan Chen

发明人： Kuan-i Li ,  Jui-Ming Wei ,  Chun-nan Chen

IPC分类号： H04L27/00

CPC分类号： G01S19/36 ,  G01S19/33

摘要： A method of direct RF digitization for multiple RF signal bands such GNSS or wireless communication signal bands and a receiver using the method. By using the method, an optimal sampling frequency to be used in direct RF digitization for signals of multiple RF signal bands can be easily obtained. According to the present invention, one or more of the RF signal bands are selected to be shifted to target band(s). By doing so, the optimal sampling frequency can be easily calculated. Then the obtained sampling frequency is used in executing the direct RF digitization.

摘要翻译： 一种用于诸如GNSS或无线通信信号频带的多个RF信号频带的直接RF数字化方法以及使用该方法的接收机。 通过使用该方法，可以容易地获得用于多个RF信号频带的信号的直接RF数字化中的最佳采样频率。 根据本发明，选择一个或多个RF信号频带以转移到目标频带。 通过这样做，可以容易地计算最佳采样频率。 然后获得的采样频率用于执行直接RF数字化。

公开(公告)号：US08174441B2

公开(公告)日：2012-05-08

申请号：US12791861

申请日：2010-06-01

申请人： Chun-Nan Chen ,  Wen-Chieh Tsai ,  Kuan-I Li

发明人： Chun-Nan Chen ,  Wen-Chieh Tsai ,  Kuan-I Li

IPC分类号： G01S19/35

CPC分类号： G01S19/34

摘要： A configurable calculating circuit includes a multiplexer, a mixer and an accumulator. The multiplexer is for receiving input signals including at least a first and a second input signals, and selectively outputting at least one of the input signals. The mixer is for mixing a selected input signal outputted from the multiplexer with a local oscillation signal to generate a mixed signal. The accumulator is for accumulating the mixed signal to generate an accumulated signal. When the configurable calculating circuit is operated under a first mode, the multiplexer selects the first input signal, and the accumulator performs a first accumulating operation upon the mixed signal; and when the configurable calculating circuit is operated under a second mode, the multiplexer selects the second input signal, and the accumulator performs a second accumulating operation, different from the first accumulating operation, upon the mixed signal.

摘要翻译： 可配置的计算电路包括多路复用器，混频器和累加器。 多路复用器用于接收包括至少第一和第二输入信号的输入信号，并且选择性地输出至少一个输入信号。 混频器用于将从多路复用器输出的所选择的输入信号与本地振荡信号混频以产生混合信号。 累加器用于累积混合信号以产生累积信号。 当可配置计算电路在第一模式下操作时，多路复用器选择第一输入信号，并且累加器对混合信号执行第一累加操作; 并且当所述可配置计算电路在第二模式下操作时，所述多路复用器选择所述第二输入信号，并且所述累加器对所述混合信号执行与所述第一累加操作不同的第二累加操作。

公开(公告)号：US08238490B2

公开(公告)日：2012-08-07

申请号：US12392325

申请日：2009-02-25

申请人： Hsin-Chung Yeh ,  Kuan-I Li

发明人： Hsin-Chung Yeh ,  Kuan-I Li

IPC分类号： H04L27/06

CPC分类号： H04L27/0014

摘要： A method for determining a Doppler shift of a first signal is provided. First, a plurality of Doppler frequency hypotheses is combined to obtain a joint Doppler signal. The first signal is the correlated according to the joint Doppler signal and a plurality of code signals with phases corresponding to a series of code phase hypotheses to obtain a series of correlation results which are then examined to determine whether the Doppler shift does lie in the Doppler hypotheses. A fine Doppler search is then performed to determine the Doppler shift when the Doppler shift lies in the Doppler hypotheses.

摘要翻译： 提供了一种用于确定第一信号的多普勒频移的方法。 首先，组合多个多普勒频率假设以获得联合多普勒信号。 第一信号是根据联合多普勒信号和具有与一系列码相位假设相对应的相位的多个码信号相关的，以获得一系列相关结果，然后检查相关结果，以确定多普勒频移是否位于多普勒 假设。 然后，当多普勒频移位于多普勒假设中时，执行精细多普勒搜索以确定多普勒频移。

公开(公告)号：US07835687B2

公开(公告)日：2010-11-16

申请号：US11874728

申请日：2007-10-18

申请人： Kuan-i Li

发明人： Kuan-i Li

IPC分类号： H04K3/00

CPC分类号： H04K3/228 ,  G01S19/21 ,  H04B1/7097 ,  H04B2201/70715

摘要： A jamming detector and jamming detecting method are disclosed. In accordance with the present invention, distribution of a received signal is compared with a reference distribution of a specific signal model. Deviation of the signal distribution from the reference distribution can be obtained according to the comparison results. The existence of jamming is determined according to the deviation. If the signal distribution significantly deviates from the reference distribution, it means that jamming exists. An anti-jamming circuit or algorithm can be activated only when jamming is detected, thereby power consumption is reduced.

摘要翻译： 公开了一种干扰检测器和干扰检测方法。 根据本发明，将接收信号的分布与特定信号模型的参考分布进行比较。 根据比较结果可以获得信号分布与参考分布的偏差。 干扰的存在根据偏差确定。 如果信号分布显着偏离参考分布，则表示存在干扰。 只有在检测到卡纸时，才能激活抗干扰电路或算法，从而降低功耗。

公开(公告)号：US20090153397A1

公开(公告)日：2009-06-18

申请号：US11956757

申请日：2007-12-14

申请人： Kuan-i Li ,  Zong-hua You ,  An-bang Chen

发明人： Kuan-i Li ,  Zong-hua You ,  An-bang Chen

IPC分类号： G01S1/00 ,  H04B1/00

CPC分类号： G01S19/21 ,  G01S19/254 ,  G01S19/29

摘要： A GNSS satellite signal handling method is disclosed. For a specific Doppler bin, when a peak is found, it is checked if the specific Doppler bin is polluted with interference by detection. If the detection result indicates that the specific Doppler bin is polluted with interference, a threshold, which is used to determine whether the actual signal peak is found or not, is then raised to a higher level, so as to increase the searching reliability. To detect interference, it is determined whether the specific Doppler bin is polluted by comparing a statistical value of correlation results of a plurality of code chip hypotheses with a reference or by checking if there are plural peaks existing in the power spectrum.

摘要翻译： 公开了GNSS卫星信号处理方法。 对于特定的多普勒箱，当发现峰值时，检查特定多普勒箱是否受到检测的干扰。 如果检测结果表示特定的多普勒箱被干扰地污染，则用于确定实际信号峰值是否被发现的阈值被提高到更高的水平，以增加搜索的可靠性。 为了检测干扰，通过将多个码片假设的相关结果的统计值与参考值进行比较，或者通过检查在功率谱中是否存在多个峰值来确定特定多普勒频段是否被污染。