公开(公告)号：EP1222785A1

公开(公告)日：2002-07-17

申请号：EP00972248.9

申请日：2000-10-17

申请人： QUALCOMM INCORPORATED

发明人： GLAZKO, Serguei, A.

IPC分类号： H04L27/233

CPC分类号： H04L27/2332

摘要： A method and apparatus for dynamic temperature compensation and pilot stage searcher selection in a mobile unit (95) of a CDMA wireless communication link. Temperature values and measured pilot frequencies are stored in a Temperature Compensation Table and a Temperature Array (130). The dynamically updated frequency values maitained in the Temperature Compensation Table and Temperature Array (130) are used to determine the searcher stage to be used in pilot signal acquisition. Both the Temperature Compensation Table and Temperature Array (TA) (130) are updated every 30 seconds after the mobile unit has acquired a pilot signal. The values in the Temperature Array correspond only to values measured during the current phone power on cycle. If the mobile unit (95) loses acquisition with a pilot signal and must reacquire, the acquisition software examines the TA values to determine whether or not the current temperature is saved in the TA. If the current temperature is saved in the TA then a recent frequency estimate exists and the pilot acquisition software uses the frequency estimate and utilizes a fast searcher algorithm. If the current temperature is within a predetermined threshold of the values saved in the TA, the pilot acquisition software calculate a weighted estimate of the frequency based upon the values saved in the TA and values previously saved in the Temperatute Compensation Table. The acquisition software then makes a decision of which searcher stage to be used based upon the weigthed frequency estimate.

公开(公告)号：EP2109938A2

公开(公告)日：2009-10-21

申请号：EP07874368.9

申请日：2007-12-17

申请人： QUALCOMM Incorporated

发明人： GLAZKO, Serguei, A. ,  BECKMAN, James, Edward ,  PATEL, Shimman

IPC分类号： H04B1/10 ,  H04L27/26

CPC分类号： H04L27/2647 ,  H04B1/1036 ,  H04K3/228

摘要： Techniques for detecting and suppressing jammers are described. A receiver may perform post-FFT jammer detection and pre-FFT jammer suppression. The receiver may transform an input signal to obtain a frequency-domain signal and may detect for jammers in the input signal based on the frequency-domain signal. The receiver may determine powers of a plurality of carriers based on the frequency-domain signal and may detect for jammers based on peaks in the powers of these carriers. The receiver may filter the input signal (e.g., with a notch filter) to suppress the detected jammers. Alternatively or additionally, the receiver may perform post-FFT jammer detection and post-FFT jammer suppression. The receiver may determine whether jammer is present on each carrier based on data power and channel power for that carrier. The receiver may modify (e.g., zero out or reduce) the frequency-domain signal on carriers with detected jammers.

摘要翻译： 描述了用于检测和抑制干扰的技术。 接收机可以执行FFT后干扰检测和预FFT干扰抑制。 接收机可以变换输入信号以获得频域信号，并且可以基于频域信号来检测输入信号中的干扰。 接收机可以基于频域信号来确定多个载波的功率，并且可以基于这些载波的功率的峰值来检测干扰。 接收机可以过滤输入信号（例如，使用陷波滤波器）来抑制所检测到的干扰。 或者或另外，接收机可以执行FFT后干扰检测和FFT后干扰抑制。 接收机可以基于该载波的数据功率和信道功率来确定每个载波上是否存在干扰信号。 接收机可以利用检测到的干扰来修改（例如，零或降低）载波上的频域信号。

公开(公告)号：EP1112508B1

公开(公告)日：2009-10-21

申请号：EP99968718.9

申请日：1999-09-02

申请人： QUALCOMM INCORPORATED

发明人： SOLIMAN, Samir, S. ,  GLAZKO, Serguei, A. ,  AGASHE, Parag, A.

IPC分类号： G01S1/00

CPC分类号： G01S19/24 ,  G01S19/246

摘要： Method and apparatus providing enhanced sensitivity for GPS receivers (400, 500, 600, 700) by allowing coherent integration of a correlation over several code periods of a GPS signal in one embodiment, and by performing a time to frequency domain conversion to the output from a correlation processor (507) in a second embodiment. In the case in which coherent integration is performed over several code periods, advantage is taken of the fact that CDMA cellular telephone base stations transmit information that allows the receiver to determine GPS time before beginning a GPS signal acquisition process. The integration can be expanded to include code periods from more than one bit period, if the GPS receiver (400, 500, 600, 700) takes advantage of the fact that known bit patterns are transmitted at particular times within the transmission from a GPS satellite. If no base station is within range, then the output from a correlator (507) that integrates a correlation over one code period is used to generate values that are input to a discrete time domain to frequency domain transform processor (511). The output from the transform processor (511) will indicate the presence of a signal from a particular satellite and the offset between locally generated signal and the received GPS signal.

公开(公告)号：EP1222785B1

公开(公告)日：2005-12-07

申请号：EP00972248.9

申请日：2000-10-17

申请人： QUALCOMM INCORPORATED

发明人： GLAZKO, Serguei, A.

IPC分类号： H04L27/233

CPC分类号： H04L27/2332

公开(公告)号：EP2294871A1

公开(公告)日：2011-03-16

申请号：EP09747189.0

申请日：2009-05-05

申请人： QUALCOMM Incorporated

发明人： CHIN, Tom ,  NAGUIB, Ayman, Fawzy ,  SHI, Guangming, Carl ,  BREHLER, Matthias ,  GLAZKO, Serguei, A.

IPC分类号： H04W48/16

CPC分类号： H04W48/16 ,  H04W88/06

摘要： Certain embodiments of the present disclosure provide a method for scanning for paging messages in a second radio access technology (RAT) network, such as a CDMA network, while connected to a first RAT network, such as a WiMAX network. For certain embodiments, an enhanced scanning request message may facilitate establishing a scanning cycle in the first RAT that aligns with a paging cycle of the second RAT.

公开(公告)号：EP1470730A1

公开(公告)日：2004-10-27

申请号：EP03704085.4

申请日：2003-01-31

申请人： QUALCOMM Incorporated

发明人： GLAZKO, Serguei, A. ,  YALLAPRAGADA, Subbarao ,  CHEN, Jiangxin

IPC分类号： H04Q7/32 ,  H04Q7/38

CPC分类号： H04W36/14

摘要： Interoperability between wireless communication systems, such as the IS2000-1x and IS856 systems, is facilitated by using supervision timers. A wireless communication device starts one or more supervision timers and performs an intersystem transition. When the wireless communication device returns from the transition, the supervision timers are used to estimate the duration of the transition. The wireless communication device then performs a sequence of tasks appropriate to the estimated duration.

公开(公告)号：EP1269650A1

公开(公告)日：2003-01-02

申请号：EP01926478.7

申请日：2001-03-29

申请人： QUALCOMM INCORPORATED

发明人： HUGHES, Robbin ,  YAO, De-Gang ,  GLAZKO, Serguei, A.

IPC分类号： H04B1/707

CPC分类号： H04B1/70775 ,  H04B1/70751 ,  H04B1/70754 ,  H04B1/7115 ,  H04B2201/70701 ,  H04B2201/70702

摘要： In a remote unit (39) of a wireless communication system, the speed of acquisition, or reacquisition, of a pilot signal by a search engine (47) is increased. PN space is divided into segments and a coarse search of each segment is performed using a set of 'fast' search parameters. A set of peak signal strengths, along with their corresponding PN offsets, is saved to memory (49) for each segment of PN space. Following the search of all segments of PN space, the peak signal strengths which were saved during the coarse acquisition are evaluated by a controller (50). Coarse acquisition search results are used by the remote unit (39) to determine fine search window parameters for subsequent searches performed by the remote unit (39) search engine (44). The fine search parameters concentrate searching efforts of the remote unit (39) search engine (44) on portions of PN space most likely to contain a viable base station pilot signal.

公开(公告)号：EP1360775B1

公开(公告)日：2008-08-06

申请号：EP02702159.1

申请日：2002-02-06

申请人： QUALCOMM INCORPORATED

发明人： GLAZKO, Serguei, A. ,  BLACK, Peter, J. ,  CHALLA, Raghu

IPC分类号： H04B1/707 ,  H04J13/00 ,  H04B7/26

CPC分类号： H04B1/70758 ,  H04B2201/70701

摘要： Techniques to search for a gated pilot reference in a wireless communication system. In one method, an overall code space in which the pilot may be found is partitioned into a number of groups of code sets, with each code set representative of all possible chip offsets of a specific PN sequence. The groups are ordered based on the likelihood of detecting the pilot in each of the groups. The groups of code sets are then used to search for the pilot, one group at a time, starting with the group most likely to result in successful pilot acquisition and ending with the group least likely to result in successful pilot acquisition. The search is terminated upon successful acquisition. The pilot search may be performed using detect, dwell, and pull-in substages. The detect substage for one group may be performed in parallel with the pull-in substage for another group.

公开(公告)号：EP1360775A1

公开(公告)日：2003-11-12

申请号：EP02702159.1

申请日：2002-02-06

申请人： QUALCOMM INCORPORATED

发明人： GLAZKO, Serguei, A. ,  BLACK, Peter, J. ,  CHALLA, Raghu

IPC分类号： H04B1/707 ,  H04J13/00 ,  H04B7/26

CPC分类号： H04B1/70758 ,  H04B2201/70701

摘要： Techniques to search for a gated pilot reference in a wireless communication system. In one method, an overall code space in which the pilot may be found is partitioned into a number of groups of code sets, with each code set representative of all possible chip offsets of a specific PN sequence. The groups are ordered based on the likelihood of detecting the pilot in each of the groups. The groups of code sets are then used to search for the pilot, one group at a time, starting with the group most likely to result in successful pilot acquisition and ending with the group least likely to result in successful pilot acquisition. The search is terminated upon successful acquisition. The pilot search may be performed using detect, dwell, and pull-in substages. The detect substage for one group may be performed in parallel with the pull-in substage for another group.

公开(公告)号：EP1212843A1

公开(公告)日：2002-06-12

申请号：EP00963543.4

申请日：2000-09-15

申请人： QUALCOMM INCORPORATED

发明人： ACHOUR, Baaziz ,  AMERGA, Messay ,  GLAZKO, Serguei, A.

IPC分类号： H04B1/707 ,  H04B7/02

CPC分类号： H04B1/7117 ,  H04B7/022 ,  H04B7/0491

摘要： A method for creating a path list for use in finger assignments comprising clearing a list of paths, choosing a sector for consideration from an active set of sectors, establishing a searcher window around the sector for consideration, and determining up to 'n' local maxima stronger than a threshold value. If a sector under consideration is transmitting on supplemental channels, the method involves artificially biasing the findings of the searcher window by a predetermined value. The biasing value may be constant, variable or proportional to the number of supplemental channels on the base station. After the local maxima corresponding to base stations transmitting on supplemental channels have been biased, the path lists are created. After the path list is created, a finger for consideration for assignment is chosen, and if the finger is not presently in lock on a path, the finger is de-assigned from the path.