公开(公告)号：US07693241B2

公开(公告)日：2010-04-06

申请号：US11392316

申请日：2006-03-28

Applicant: Thejaswi Bharadwaj Madapushi Sheshadri ,  Brian Dong ,  Messay Amerga ,  Chih-Ping Hsu ,  Parvathanathan Subrahmanya ,  Xiaoming Zhu

Inventor： Thejaswi Bharadwaj Madapushi Sheshadri ,  Brian Dong ,  Messay Amerga ,  Chih-Ping Hsu ,  Parvathanathan Subrahmanya ,  Xiaoming Zhu

IPC: H04L1/00 ,  H04B1/69 ,  H04B7/216

CPC classification number: H04B1/7117 ,  B60L2200/26

Abstract: A rake receiver finger assignor is configured to assign a rake receiver finger to a time offset between identified signal path time offsets in accordance with a concentration of identified signal paths from a transmitter to a rake receiver. In accordance with the exemplary embodiment, a number of identified signal paths having time offsets within a time window are observed to determine the concentration of signal paths identified by a path searcher. If the number of identified signal paths indicates a concentrated distribution of signal paths such as during a fat path condition, at least one rake finger is assigned between at a time offset between two identified signal paths.

Abstract translation: 耙式接收器手指分配器被配置为根据从发射机到耙式接收机的识别的信号路径的浓度，将耙机接收机手指分配到所识别的信号路径时间偏移之间的时间偏移。 根据示例性实施例，观察到在时间窗内具有时间偏移的多个识别的信号路径，以确定由路径搜索器识别的信号路径的浓度。 如果所识别的信号路径的数量表示信号路径的集中分布，例如在脂肪路径条件期间，则在两个识别的信号路径之间的时间偏移处分配至少一个耙指。

公开(公告)号：US07308022B2

公开(公告)日：2007-12-11

申请号：US10060885

申请日：2002-01-29

Applicant: Roland R. Rick ,  Messay Amerga ,  Jeremy M. Stein ,  Ivan Fernandez-Corbaton

Inventor： Roland R. Rick ,  Messay Amerga ,  Jeremy M. Stein ,  Ivan Fernandez-Corbaton

IPC: H04B1/00

CPC classification number: G01S5/0215 ,  G01S5/0221 ,  G01S19/22 ,  H04B1/70755 ,  H04B1/7117

Abstract: A parameter estimator for estimating one or more parameter(s) from a signal is described. A correlation function is derived from the signal, and the correlation function analyzed to determine if one or more first peak(s) are present, and, if so, distinguishable from the sidelobe(s) of a second peak. If the one or more first peak(s) are present and distinguishable from the sidelobe(s) of the second peak, the one or more parameter(s) are estimated from the one or more first peak(s). If the one or more first peak(s) are not present, or, if present, are not distinguishable from the sidelobe(s) of the second peak, the one or more parameter(s) are estimated from the second peak. The parameter estimator may be employed in a subscriber station to estimate a parameter such as the time of arrival of one or more base station or sector pilot signals in a wireless communication system. This information may be utilized in an overall advanced forward link trilateration (AFLT) process for estimating the location of the subscriber station.

Abstract translation: 描述了用于从信号估计一个或多个参数的参数估计器。 从信号中导出相关函数，分析相关函数以确定是否存在一个或多个第一峰，如果是，则与第二峰的旁瓣区分开。 如果一个或多个第一峰存在并且可与第二峰的旁瓣区分开，则从一个或多个第一峰估计一个或多个参数。 如果一个或多个第一峰不存在，或者如果存在，则不能与第二峰的旁瓣区分开，则从第二峰估计一个或多个参数。 可以在用户台中使用参数估计器来估计诸如无线通信系统中的一个或多个基站或扇区导频信号的到达时间的参数。 该信息可以用于用于估计用户台的位置的总体高级前向链路三边测量（AFLT）过程。

公开(公告)号：US20070098051A1

公开(公告)日：2007-05-03

申请号：US11392316

申请日：2006-03-28

Applicant: Thejaswi Bharadwaj Shesha ,  Brian Dong ,  Messay Amerga ,  Chih-Ping Hsu ,  Parvathanathan Subrahmanya ,  Xiaoming Zhu

Inventor： Thejaswi Bharadwaj Shesha ,  Brian Dong ,  Messay Amerga ,  Chih-Ping Hsu ,  Parvathanathan Subrahmanya ,  Xiaoming Zhu

IPC: H04B1/00

CPC classification number: H04B1/7117 ,  B60L2200/26

Abstract: A rake receiver finger assignor is configured to assign a rake receiver finger to a time offset between identified signal path time offsets in accordance with a concentration of identified signal paths from a transmitter to a rake receiver. In accordance with the exemplary embodiment, a number of identified signal paths having time offsets within a time window are observed to determine the concentration of signal paths identified by a path searcher. If the number of identified signal paths indicates a concentrated distribution of signal paths such as during a fat path condition, at least one rake finger is assigned between at a time offset between two identified signal paths.

Abstract translation: 耙式接收器手指分配器被配置为根据从发射机到耙式接收机的识别的信号路径的浓度，将耙机接收机手指分配到所识别的信号路径时间偏移之间的时间偏移。 根据示例性实施例，观察到在时间窗内具有时间偏移的多个识别的信号路径，以确定由路径搜索器识别的信号路径的浓度。 如果所识别的信号路径的数量表示信号路径的集中分布，例如在脂肪路径条件期间，则在两个识别的信号路径之间的时间偏移处分配至少一个耙指。

公开(公告)号：US07039418B2

公开(公告)日：2006-05-02

申请号：US09922997

申请日：2001-08-03

Applicant: Messay Amerga ,  Christopher Patrick ,  Roland Rick ,  Douglas N. Rowitch ,  Saed Younis

Inventor： Messay Amerga ,  Christopher Patrick ,  Roland Rick ,  Douglas N. Rowitch ,  Saed Younis

IPC: H04Q7/20

CPC classification number: H04W64/00 ,  G01S5/0273 ,  G01S19/06 ,  G01S19/46 ,  H04B7/2606

Abstract: Techniques to detect whether or not a remote terminal is under the coverage of a repeater within a wireless communication network, which may be based on (1) a list of base stations expected to be received while under the repeater's coverage, (2) the characterized environment of the repeater, and/or (3) the propagation delays for a transmission received at the remote terminal. Additional ambiguity resulting from being under a repeater's coverage may also be accounted for and/or compensated by (1) discarding time measurements from repeated base stations, (2) adjusting the processing for position estimation to account for the additional ambiguity due to the repeater, (3) computing a series of position estimates based on multiple transmissions received from the same originating base station and selecting the best estimate, and/or (4) computing a series of position estimates based on multiple transmissions from multiple originating base stations and selecting the best estimate.

公开(公告)号：US20050054368A1

公开(公告)日：2005-03-10

申请号：US10650564

申请日：2003-08-27

Applicant: Messay Amerga

Inventor： Messay Amerga

IPC: H04L12/56 ,  H04W24/00 ,  H04W36/14 ,  H04W48/20 ,  H04W72/12 ,  H04Q7/20

CPC classification number: H04W48/20 ,  H04W36/0083

Abstract: Techniques for intra-frequency searching in the presence of frequency gaps are disclosed. In one embodiment, a search is scheduled and frequency switches are suppressed during the scheduled search. In another embodiment, a search is scheduled in between anticipated frequency gaps. In yet another embodiment, a timer is deployed, the expiration of which indicates a search is to be scheduled. In yet another embodiment, a timer is deployed, the expiration of which indicates a search is to be scheduled and frequency switches are suppressed during the scheduled search. Various other embodiments are also presented. Benefits include allowing prescribed levels of intra-frequency and inter-frequency search to be performed which allows for improved base station selection and therefore improved performance and system capacity.

Abstract translation: 公开了在存在频率间隙的情况下进行频率内搜索的技术。 在一个实施例中，调度搜索并且在调度搜索期间抑制频率切换。 在另一个实施例中，在预期频率间隙之间调度搜索。 在另一个实施例中，部署了计时器，其期限指示将要调度搜索。 在另一个实施例中，部署定时器，其期限指示将要调度搜索，并且在调度搜索期间抑制频率切换。 还提出了各种其它实施例。 优点包括允许执行规定级别的频率内和频率间搜索，从而改善基站选择，从而提高性能和系统容量。

公开(公告)号：US06819931B2

公开(公告)日：2004-11-16

申请号：US09904325

申请日：2001-07-12

Applicant: Messay Amerga ,  Abhay A. Joshi ,  Mark Levin

Inventor： Messay Amerga ,  Abhay A. Joshi ,  Mark Levin

IPC: H04Q720

CPC classification number: H04B1/7117

Abstract: A method for assigning tracking elements includes sorting a list of potential assignments according to a diversity criterion. In one example, a list of received signal instances is sorted first according to a measure of energy and then sorted again according to the diversity criterion. In a further embodiment, a demodulation element may be labeled available for assignment yet continue to output demodulated symbols in a locked state. Applications to a mobile station of a CDMA system for cellular telephony are discussed.

Abstract translation: 用于分配跟踪元素的方法包括根据分集标准排列潜在分配的列表。 在一个示例中，接收到的信号实例的列表首先根据能量的度量进行排序，然后根据多样性标准再次分类。 在另一个实施例中，解调元件可以被标记为可用于分配，但是在锁定状态下继续输出解调的符号。 讨论了用于蜂窝电话的CDMA系统的移动站的应用。

公开(公告)号：US06785554B1

公开(公告)日：2004-08-31

申请号：US09398907

申请日：1999-09-15

Applicant: Messay Amerga

Inventor： Messay Amerga

IPC: H04B700

CPC classification number: H04B1/7117 ,  H04B7/022 ,  H04B7/0491

Abstract: A method and communication system for assigning the plurality of fingers to demodulation paths in a path list which insures that at least one finger will be assigned to a demodulation path supporting a supplemental channel, if one exists. The method involves determining whether any of the fingers is demodulating a supplemental channel (112). When no fingers are demodulating supplemental channels, the it is determined whether the sector containing the path under consideration supports supplemental channels (114). If the sector containing the path under consideration supports supplemental channels, then the method determines the strength of the signal path relative to the weakest finger (116). If the path is a certain amount greater in strength then the weakest finger, then the method involves reassigning that finger to the path with the supplemental channel (108) and if the path with the supplemental channel is a certain amount of strength weaker than the weakest finger plus a certain value, then the method involves determining whether the weakest finger is the only one supporting the supplemental channel (118). If the weakest finger is the only one supporting supplemental channels, and the sector supports supplemental channels (120), then that finger is assigned to the demodulation path with the supplemental channel (108), thus insuring that the information on a supplemental channel is always demodulated by a finger during a soft-handoff in a high data rate call if one or more fingers are already demodulating supplemental channels, then the finger assignment algorithm will proceed in the conventional way.

Abstract translation: 一种方法和通信系统，用于将多个指状物分配给路径列表中的解调路径，确保至少一个手指将被分配给支持补充信道的解调路径（如果存在）。 该方法涉及确定任何一个手指是否解调补充信道（112）。 当没有手指解调补充信道时，确定包含正在考虑的路径的扇区是否支持补充信道（114）。 如果包含正在考虑的路径的扇区支持补充信道，则该方法确定相对于最弱手指（116）的信号路径的强度。 如果路径的强度一定大于最弱的手指，则该方法包括将该手指重新分配到具有补充通道（108）的路径上，并且如果具有补充通道的路径具有弱于最弱的一定强度的强度 手指加一定值，则该方法涉及确定最弱的手指是否是唯一支持补充通道（118）的手指。 如果最弱的手指是唯一支持补充信道的手指，并且扇区支持补充信道（120），那么该手指被分配给具有补充信道（108）的解调路径，从而确保补充信道上的信息总是 如果一个或多个手指已经解调补充信道，则在高数据速率呼叫中的软切换期间由手指解调，则手指分配算法将以常规方式进行。

公开(公告)号：US06738438B2

公开(公告)日：2004-05-18

申请号：US10056877

申请日：2002-01-24

Applicant: Roland R. Rick ,  Borislav Ristic ,  Messay Amerga ,  Jeremy M. Stein ,  Ivan Fernandez-Corbaton ,  Ashok Bhatia

Inventor： Roland R. Rick ,  Borislav Ristic ,  Messay Amerga ,  Jeremy M. Stein ,  Ivan Fernandez-Corbaton ,  Ashok Bhatia

IPC: H04L2706

CPC classification number: H04B1/70754 ,  G01S5/0221

Abstract: A parameter estimator for estimating one or more parameter(s) from a correlation function derived from a signal using a dynamically variable search window is described. The parameter estimator may be employed in a subscriber station to estimate the time of arrival of one or more base station pilot signals in a wireless communication system. This information may be utilized in an overall advanced forward link trilateration (AFLT) process for estimating the location of the subscriber station.

Abstract translation: 描述了一种用于使用动态变量搜索窗口从从信号导出的相关函数中估计一个或多个参数的参数估计器。 在用户站中可以采用参数估计器来估计无线通信系统中的一个或多个基站导频信号的到达时间。 该信息可以用于用于估计用户台的位置的总体高级前向链路三边测量（AFLT）过程。

公开(公告)号：US06650912B2

公开(公告)日：2003-11-18

申请号：US09956324

申请日：2001-09-18

Applicant: Jiangxin Chen ,  Arthur Neufeld ,  Serguei Glazko ,  Messay Amerga

Inventor： Jiangxin Chen ,  Arthur Neufeld ,  Serguei Glazko ,  Messay Amerga

IPC: H04B138

CPC classification number: H04W68/025 ,  H04W24/00 ,  H04W52/0216 ,  H04W52/0245 ,  H04W68/00 ,  H04W72/08 ,  Y02D70/122

Abstract: A quick paging channel (QPCH) is used to receive paging indicators that indicate that a wireless communication device (WCD) has a message on a paging channel relating to, for example, an incoming call to the WCD. When the condition of the quick paging channel is too low to receive paging indicators reliably, the quick paging channel is disabled to avoid false alarms, and the slotted paging channel is used to receive paging messages without monitoring the QPCH. When the QPCH signal is strong, the probability of false alarms is lower, and the quick paging channel is enabled. By using the quick paging channel to receive paging indicators only when the QPCH signal is strong, the wireless communication device can remain in a sleep state for greater periods of time as compared with the use of a slotted paging channel. As a result, standby time may be significantly improved.

Abstract translation: 快速寻呼信道（QPCH）用于接收指示无线通信设备（WCD）在寻呼信道上具有与例如对WCD的呼入有关的消息的寻呼指示符。 当快速寻呼信道的条件太低而无法可靠地接收寻呼指示时，快速寻呼信道被禁止，以避免误报，而时隙寻呼信道用于接收寻呼消息而不监控QPCH。 当QPCH信号强时，误报的概率较低，快速寻呼信道被使能。 通过使用快速寻呼信道仅在QPCH信号强时接收寻呼指示符，与使用时隙寻呼信道相比，无线通信设备可以保持较长时间的睡眠状态。 结果，可以显着提高待机时间。

公开(公告)号：US08139542B2

公开(公告)日：2012-03-20

申请号：US12239027

申请日：2008-09-26

Applicant: Brian Dong ,  Messay Amerga ,  Supratik Bhattacharjee ,  Xiaoming Zhu

Inventor： Brian Dong ,  Messay Amerga ,  Supratik Bhattacharjee ,  Xiaoming Zhu

IPC: H04W4/00

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B1/70753 ,  H04B1/70758 ,  H04B2201/70702 ,  H04W36/30 ,  H04W48/16

Abstract: Cell timing is detected by first trying to detect a target handover cell through detecting a primary synchronization channel (P-SCH) followed by a common pilot channel (CPICH). If that fails, N number of retrials is performed using a full-window search on the CPICH. The full-window CPICH search is performed blindly, without any slot timing information from the P-SCH. Performance is improved while maintaining the benefits of faster acquisition methods in good channel conditions. The full-window search is more time consuming, but takes advantage of the stronger CPICH transmission. In good channel conditions, a mobile device can proceed quickly with the normal method of timing acquisition. With failure, the mobile device can switch to the longer search which has a higher probability of successfully completing the hard handover procedure. The overall effect is a higher success rate of hard handovers without a uniform increase of time spent in cell timing acquisition.

Abstract translation: 通过首先通过检测跟随公共导频信道（CPICH）的主同步信道（P-SCH）来尝试检测目标切换小区来检测小区定时。 如果失败，则使用CPICH上的全窗口搜索来执行N次重试。 完全窗口CPICH搜索盲目执行，没有来自P-SCH的任何时隙定时信息。 性能得到改善，同时在良好的通道条件下保持更快的采集方法的好处。 全窗口搜索更耗时，但利用更强的CPICH传输。 在良好的信道条件下，移动设备可以通过正常的定时采集方法快速进行。 随着故障，移动设备可以切换到成功完成硬切换过程的较高概率的较长搜索。 总体效果是更高的硬切换成功率，而没有在单元定时采集中花费的时间的均匀增加。