公开(公告)号：US07586837B2

公开(公告)日：2009-09-08

申请号：US10056920

申请日：2002-01-24

申请人： Mark Roh ,  Raghu Challa ,  Serguei A. Glazko

发明人： Mark Roh ,  Raghu Challa ,  Serguei A. Glazko

IPC分类号： H04J11/00 ,  H04B3/10 ,  H04B1/10 ,  H04L27/06

CPC分类号： H04B1/7077

摘要： Systems and techniques are disclosed detecting an embedded signal which includes producing a plurality of first correlated values from a portion of the first signal and a second signal, transforming the first correlation values into a plurality of second correlation values related to a frequency content of the first correlation values, and searching for the embedded signal by evaluating the second correlation values. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.

摘要翻译： 检测嵌入式信号的系统和技术包括从第一信号和第二信号的一部分产生多个第一相关值，将第一相关值变换成与第一信号的频率内容相关的多个第二相关值 相关值，并通过评估第二相关值来搜索嵌入信号。 要强调的是，该摘要被提供以符合要求摘要的规则，这将允许搜索者或其他读者快速确定技术公开的主题。 提交它的理解是，它不会用于解释或限制权利要求的范围或含义。

公开(公告)号：US06829485B2

公开(公告)日：2004-12-07

申请号：US09955521

申请日：2001-09-12

申请人： Farrokh Abrishamkar ,  Mark Roh

发明人： Farrokh Abrishamkar ,  Mark Roh

IPC分类号： H04Q720

CPC分类号： H04W68/00 ,  H04B1/7075 ,  H04B1/7115 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04W52/028 ,  H04W68/025 ,  Y02D70/40

摘要： A system determines if a primary paging channel should be received based on an examination of a quick paging channel. A first QPCH symbol is examined (102) and the normalized pilot energy is determined (104). If the normalized pilot energy is above a first threshold (106), the symbol is demodulated and the QPCH-symbol-to-pilot-energy ratio is determined (110) and compared against another threshold (112). If the normalized pilot energy is below the first threshold, the system proceeds to the second QPCH symbol immediately. Depending on the resulting values, a second QPCH signal is examined (108), the system sleeps (114), or the system decides (116) to process the primary paging channel directly (118). If the second signal is demodulated, and if its normalized pilot energy is high enough, it also is demodulated and the ratio of the sum-of-the-combined-QPCH-symbols to the sum-of-the-combined-pilot-energies is determined (122). If this ratio exceeds a threshold (124), the primary paging channel is processed (118); otherwise the system sleeps (114).

摘要翻译： 系统基于快速寻呼信道的检查来确定是否应该接收主寻呼信道。 检查第一QPCH符号（102）并且确定归一化导频能量（104）。 如果归一化的导频能量高于第一阈值（106），则对该符号进行解调并且确定QPCH符号到导频能量比（110）并与另一阈值（112）进行比较。 如果归一化的导频能量低于第一阈值，则系统立即进入第二QPCH符号。 根据得到的值，检查第二QPCH信号（108），系统休眠（114），或者系统决定（116）直接处理主寻呼信道（118）。 如果第二信号被解调，并且如果其归一化导频能量足够高，则其也被解调，并且组合QPCH符号之和与组合导频能量之和的比率 确定（122）。 如果该比率超过阈值（124），则处理主寻呼信道（118）; 否则系统睡眠（114）。

公开(公告)号：US06771616B2

公开(公告)日：2004-08-03

申请号：US09952722

申请日：2001-09-13

申请人： Farrokh Abrishamkar ,  Mark Roh

发明人： Farrokh Abrishamkar ,  Mark Roh

IPC分类号： H04Q100

CPC分类号： H04W68/00 ,  H04B1/7075 ,  H04B1/7115 ,  H04B2201/70701 ,  H04W52/0216 ,  H04W52/0219 ,  H04W52/0245 ,  Y02D70/40

摘要： A system determines if a primary paging channel should be received based on an examination of a quick paging channel. A first QPCH symbol is examined (102) and the normalized pilot energy is determined (104). If the normalized pilot energy is above a first threshold (106), the symbol is demodulated and the QPCH-symbol-to-pilot-energy ratio is determined (110) and compared against another threshold (114). If the normalized pilot energy is below the first threshold, the system proceeds to the second QPCH symbol immediately. Based on the two comparisons, a second QPCH signal is examined (108) or the system sleeps (116). If the second signal is examined, and if its normalized pilot energy is high enough, it also is demodulated and the ratio of the sum-of-the-combined-QPCH-symbols to the sum-of-the-combined-pilot-energies is determined (122). If this ratio exceeds a threshold (124), the primary paging channel is processed (120); otherwise the system sleeps (116).

摘要翻译： 系统基于快速寻呼信道的检查来确定是否应该接收主寻呼信道。 检查第一QPCH符号（102）并且确定归一化导频能量（104）。 如果归一化的导频能量高于第一阈值（106），则对该符号进行解调，并且确定QPCH符号到导频能量比（110）并与另一个阈值进行比较（114）。 如果归一化的导频能量低于第一阈值，则系统立即进入第二QPCH符号。 基于两个比较，检查第二QPCH信号（108）或系统睡眠（116）。 如果检测到第二信号，并且如果其归一化导频能量足够高，则其也被解调，并且组合QPCH符号之和与组合导频能量之和的比率 确定（122）。 如果该比率超过阈值（124），则处理主寻呼信道（120）; 否则系统睡眠（116）。

公开(公告)号：US20070110130A1

公开(公告)日：2007-05-17

申请号：US11621145

申请日：2007-01-09

申请人： Inyup Kang ,  Mark Roh ,  Brendon Johnson

发明人： Inyup Kang ,  Mark Roh ,  Brendon Johnson

IPC分类号： H04B1/00

CPC分类号： H04B1/70758 ,  H04B1/70757 ,  H04B1/7117

摘要： In general, the invention facilitates searching for energy peaks in spread spectrum wireless communication systems with greater precision. More particularly, various embodiments of the invention may involve reporting not only an energy peak and its associated offset, but also the energy levels corresponding to one or more offsets occurring before and after the offset at which the energy peak occurs. Interpolation or extrapolation techniques may be used to predict the actual location of an energy peak based on the apparent location of the peak and the energy levels observed at surrounding offsets.

摘要翻译： 通常，本发明有助于以更高的精度搜索扩频无线通信系统中的能量峰值。 更具体地，本发明的各种实施例可以包括不仅报告能量峰值及其相关联的偏移，还报告对应于发生能量峰值的偏移之前和之后发生的一个或多个偏移的能级。 可以使用插值或外插技术来基于峰值的表观位置和在周围偏移处观察到的能量水平来预测能量峰值的实际位置。

公开(公告)号：US07200162B2

公开(公告)日：2007-04-03

申请号：US10000928

申请日：2001-10-23

申请人： Inyup Kang ,  Mark Roh ,  Brendon L. Johnson

发明人： Inyup Kang ,  Mark Roh ,  Brendon L. Johnson

IPC分类号： H04B1/707

CPC分类号： H04B1/70758 ,  H04B1/70757 ,  H04B1/7117

摘要： In general, the invention facilitates searching for energy peaks in spread spectrum wireless communication systems with greater precision. More particularly, various embodiments of the invention may involve reporting not only an energy peak and its associated offset, but also the energy levels corresponding to one or more offsets occurring before and after the offset at which the energy peak occurs. Interpolation or extrapolation techniques may be used to predict the actual location of an energy peak based on the apparent location of the peak and the energy levels observed at surrounding offsets.

摘要翻译： 通常，本发明有助于以更高的精度搜索扩频无线通信系统中的能量峰值。 更具体地，本发明的各种实施例可以包括不仅报告能量峰值及其相关联的偏移，还报告对应于发生能量峰值的偏移之前和之后发生的一个或多个偏移的能级。 可以使用插值或外插技术来基于峰值的表观位置和在周围偏移处观察到的能量水平来预测能量峰值的实际位置。

公开(公告)号：US20050099334A1

公开(公告)日：2005-05-12

申请号：US10979918

申请日：2004-11-01

申请人： Mark Roh

发明人： Mark Roh

IPC分类号： G01S19/21 ,  G01S1/00 ,  G01S19/09 ,  G01S19/25 ,  G01S19/26 ,  G01S19/30 ,  G01S5/14

CPC分类号： G01S19/21 ,  G01S19/09 ,  G01S19/14 ,  G01S19/25 ,  G01S19/30

摘要： A method and apparatus mitigating the effects of cross-correlation signals on received satellite signals in a Global Positioning System (GPS) receiver is described. MS-Assisted and MS-Based cross-correlation detection and mitigation methods and apparatus are described. A GPS search mode architecture is used to detect SV signals and identify potential cross-correlations. The GPS search modes have different coherent integration lengths and different degrees of sensitivity. After detection, measurements are logged into a database for further processing. Several cross-correlation tests are described. For example, a “Mainlobe” cross-correlation test is described that identifies the most significant cross-correlations that occur when the Doppler difference between the interfering SV signal and the target SV signal is nonzero and a multiple of 1 kHz. Appropriate C/No and Doppler thresholds, or masks, are selected and used to identify the mainlobe cross-correlations. A wide Doppler mask is used to account for the effects on cross-correlations caused by BPSK data bit modulation. Appropriate MS-Assisted and MS-Based cross-correlation masks are described. Other cross-correlation tests include “variable C/No”, “strong”, “wide Doppler” and “pre-emptive” cross-correlation detection tests.

摘要翻译： 描述了在全球定位系统（GPS）接收机中减轻互相关信号对接收到的卫星信号的影响的方法和装置。 描述了MS辅助和基于MS的互相关检测和缓解方法和装置。 GPS搜索模式架构用于检测SV信号并识别潜在的互相关。 GPS搜索模式具有不同的相干积分长度和不同程度的灵敏度。 检测后，将测量记录到数据库中进行进一步处理。 描述了几个互相关测试。 例如，描述了“主瓣”互相关测试，其确定当干扰SV信号与目标SV信号之间的多普勒差异为零时和1kHz的倍数时发生的最显着的交叉相关。 选择适当的C / No和Doppler阈值或掩模，以用于识别主瓣交叉相关。 使用宽多普勒掩模来解释由BPSK数据位调制引起的对互相关的影响。 描述适当的MS辅助和基于MS的互相关掩模。 其他互相关测试包括“变量C /否”，“强”，“宽多普勒”和“先发制人”互相关检测测试。

公开(公告)号：US06608858B1

公开(公告)日：2003-08-19

申请号：US09491349

申请日：2000-01-26

申请人： Gilbert C. Sih ,  Avneesh Agrawal ,  Mark Roh ,  Brian K. Butler ,  Raghu Challa

发明人： Gilbert C. Sih ,  Avneesh Agrawal ,  Mark Roh ,  Brian K. Butler ,  Raghu Challa

IPC分类号： H04B1707

CPC分类号： H04B1/7087 ,  H04B1/7115 ,  H04B1/7117 ,  H04B2201/70701 ,  H04L27/0014 ,  H04L2027/0032 ,  H04L2027/0057 ,  H04L2027/0087

摘要： A method and apparatus for frequency tracking is described. The present invention provides a tracking mechanism for removing the effects of error due to frequency offset as well as compensation for frequency error due to doppler in a plurality of multipath signals. Each finger of a RAKE receiver utilizing the present invention will compute a frequency error for that finger. The weighted average of all of these frequency errors is calculated and filtered to provide a control signal for varying the frequency of IF and RF frequency synthesizers, accounting for the common frequency offset seen at each finger. Additionally, each finger is equipped with a rotator for providing frequency adjustment specific to that finger. The frequency of each finger is adjusted through feedback of the frequency error for that finger.

摘要翻译： 描述了用于频率跟踪的方法和装置。 本发明提供了一种用于消除由于频率偏移引起的误差的影响的跟踪机制以及由多个多径信号中的多普勒引起的频率误差的补偿。 利用本发明的RAKE接收机的每个手指将计算该手指的频率误差。 计算并滤波所有这些频率误差的加权平均值，以提供用于改变IF和RF频率合成器的频率的控制信号，从而考虑每个手指处的共同频率偏移。 此外，每个手指配备有用于提供特定于该手指的频率调节的旋转器。 每个手指的频率通过该手指的频率误差的反馈进行调整。

公开(公告)号：US07656935B2

公开(公告)日：2010-02-02

申请号：US11621145

申请日：2007-01-09

申请人： Inyup Kang ,  Mark Roh ,  Brendon L. Johnson

发明人： Inyup Kang ,  Mark Roh ,  Brendon L. Johnson

IPC分类号： H04B1/707

CPC分类号： H04B1/70758 ,  H04B1/70757 ,  H04B1/7117

摘要： In general, the invention facilitates searching for energy peaks in spread spectrum wireless communication systems with greater precision. More particularly, various embodiments of the invention may involve reporting not only an energy peak and its associated offset, but also the energy levels corresponding to one or more offsets occurring before and after the offset at which the energy peak occurs. Interpolation or extrapolation techniques may be used to predict the actual location of an energy peak based on the apparent location of the peak and the energy levels observed at surrounding offsets.

摘要翻译： 通常，本发明有助于以更高的精度搜索扩频无线通信系统中的能量峰值。 更具体地，本发明的各种实施例可以包括不仅报告能量峰值及其相关联的偏移，还报告对应于发生能量峰值的偏移之前和之后发生的一个或多个偏移的能级。 可以使用插值或外插技术来基于峰值的表观位置和在周围偏移处观察到的能量水平来预测能量峰值的实际位置。