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31.发明专利
公开(公告)号：AU2003286637A1
公开(公告)日：2004-05-13
申请号：AU2003286637
申请日：2003-10-22
Applicant: QUALCOMM INC
Inventor： PATRICK CHRISTOPHER , ROWITCH DOUGLAS NEAL
IPC: G01S1/00 , G01S19/09 , G01S19/24 , G01S19/25 , G01S19/28 , G01S19/29 , G01S19/45 , G01S19/46 , H04W64/00 , G01S5/14 , H04B1/707 , G01S1/04
Abstract: A method of and system for searching for position determination signals using a plurality of progressively more sensitive search modes comprising a first level mode, a second mode, and at least one higher level mode. If any of the search window parameters exceed prescribed limits, a first level search is performed, and the search window parameters are refined responsive to the ensuing search results so they are within the prescribed limits. Then, the second level search is performed, and measurements derived from the ensuing search results. If the measurements satisfy selected measurement sufficiency criteria, additional searching within the position fix attempt is avoided. If the measurements do not satisfy the selected measurement sufficiency criteria, a higher level, more sensitive search is performed.
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公开(公告)号：CA2484504A1
公开(公告)日：2003-11-13
申请号：CA2484504
申请日：2003-05-02
Applicant: QUALCOMM INC
Inventor： ROWITCH DOUGLAS NEAL
IPC: G01S19/03 , G01S1/00 , G01S5/14 , G01S19/04 , G01S19/05 , G01S19/07 , G01S19/10 , G01S19/11 , G01S19/25 , G01S19/41 , G01S19/44 , H04B1/00 , H04B7/00 , G01S1/02
Abstract: A method of wireless communications according to one embodiment of the invention includes obtaining a first time base (e.g. obtaining a code phase) from a signal received from a ground transmitter (e.g. a CDMA base station). A predetermined offset based on at least a propagation delay of the received signal is applied to the first time base to obtain a second time base. For example, the second time base may be aligned to a time base of a positioning satellite system (e.g. the NAVSTAR GPS). A timing signal is generated that h as a code phase based on the second time base.
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公开(公告)号：BR0111670A
公开(公告)日：2003-10-07
申请号：BR0111670
申请日：2001-06-14
Applicant: QUALCOMM INC
Inventor： ROWITCH DOUGLAS NEAL , LEE WAY-SHING , EKVETCHAVIT THUNYACHATE
Abstract: Demodulator architectures for processing a received signal in a wireless communications system. The demodulator includes a number of correlators coupled to a combiner. Each correlator typically receives and despreads input samples (which are generated from the received signal) with a respective despreading sequence to provide despread samples. Each correlator then decovers the despread samples to provide decovered “half-symbols” and further demodulates the decovered half-symbols with pilot estimates to generate correlated symbols. The decovering is performed with a Walsh symbol having a length (T) that is half the length (2T) of a Walsh symbol used to cover the data symbols in the transmitted signal. The combiner selectively combines correlated symbols from the assigned correlators to provide demodulated symbols. One or more correlators can be assigned to process one or more instances of each transmitted signal. The pilot estimates used within each assigned correlator to demodulate the decovered half-symbols are generated based on the signal instance being processed by that correlator.
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公开(公告)号：AU761463B2
公开(公告)日：2003-06-05
申请号：AU2976300
申请日：2000-01-28
Applicant: QUALCOMM INC
Inventor： ROWITCH DOUGLAS NEAL
Abstract: The present invention is a novel and improved method and apparatus for performing frame identification. In accordance with one embodiment of the invention, a received frame of data is processed by generating estimates of the received frame, measuring a correlation between said estimates and stored estimates of a previously improperly received frame, processing the received frame as a retransmitted frame when said correlation is greater than a first threshold, processing the received frame as a new frame when said correlation is less than a second threshold, wherein said second threshold is less than or equal to said first threshold.
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公开(公告)号：AU6988401A
公开(公告)日：2001-12-24
申请号：AU6988401
申请日：2001-06-14
Applicant: QUALCOMM INC
Inventor： ROWITCH DOUGLAS NEAL , LEE WAY-SHING , EKVETCHAVIT THUNYACHATE
Abstract: Demodulator architectures for processing a received signal in a wireless communications system. The demodulator includes a number of correlators coupled to a combiner. Each correlator typically receives and despreads input samples (which are generated from the received signal) with a respective despreading sequence to provide despread samples. Each correlator then decovers the despread samples to provide decovered “half-symbols” and further demodulates the decovered half-symbols with pilot estimates to generate correlated symbols. The decovering is performed with a Walsh symbol having a length (T) that is half the length (2T) of a Walsh symbol used to cover the data symbols in the transmitted signal. The combiner selectively combines correlated symbols from the assigned correlators to provide demodulated symbols. One or more correlators can be assigned to process one or more instances of each transmitted signal. The pilot estimates used within each assigned correlator to demodulate the decovered half-symbols are generated based on the signal instance being processed by that correlator.
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Patent Agency Ranking
公开(公告)号：AU2976300A
公开(公告)日：2000-08-18
申请号：AU2976300
申请日：2000-01-28
Applicant: QUALCOMM INC
Inventor： ROWITCH DOUGLAS NEAL
Abstract: The present invention is a novel and improved method and apparatus for performing frame identification. In accordance with one embodiment of the invention, a received frame of data is processed by generating estimates of the received frame, measuring a correlation between said estimates and stored estimates of a previously improperly received frame, processing the received frame as a retransmitted frame when said correlation is greater than a first threshold, processing the received frame as a new frame when said correlation is less than a second threshold, wherein said second threshold is less than or equal to said first threshold.
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公开(公告)号：WO2011143601A3
公开(公告)日：2012-08-09
申请号：PCT/US2011036502
申请日：2011-05-13
Applicant: QUALCOMM INC , BOLOTSKI JOSEPHINE A , ROWITCH DOUGLAS NEAL , MOEGLEIN MARK LEO
Inventor： BOLOTSKI JOSEPHINE A , ROWITCH DOUGLAS NEAL , MOEGLEIN MARK LEO
CPC classification number: G01S19/36 , G01S19/30 , Y10T428/1186
Abstract: Methods, apparatuses, and systems are provided for processing positioning signals to obtain navigation information by applying compressed sensing.
Abstract translation: 提供了用于处理定位信号以通过应用压缩感测来获得导航信息的方法，装置和系统。
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公开(公告)号：EP2891142A4
公开(公告)日：2016-05-25
申请号：EP13760178
申请日：2013-08-28
Applicant: QUALCOMM INC
Inventor： ROWITCH DOUGLAS NEAL
CPC classification number: H04W4/023 , G01S5/02 , G01S5/0236 , H04B2203/5433 , H04Q9/00 , H04Q2209/60 , H04W24/08 , H04W84/18
Abstract: Methods, systems, computer-readable media, and apparatuses for using a smart meter as a reliable crowd-sourcing agent are presented. In some embodiments, a smart meter installed at a location may observe one or more wireless signals at the location. Subsequently, the smart meter may provide, to at least one signal almanac server, information that identifies the location and describes one or more detected properties of the one or more observed wireless signals. In at least one arrangement, the information provided to the at least one signal almanac server may be configured to be used by the at least one signal almanac server in providing position assistance information to one or more mobile devices located in a vicinity of the location.
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公开(公告)号：EP1639838A4
公开(公告)日：2011-09-07
申请号：EP04756384
申请日：2004-06-28
Applicant: QUALCOMM INC
Inventor： ROWITCH DOUGLAS NEAL
CPC classification number: H04B7/155 , G01S2013/466 , H04B7/0671 , H04B7/10
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40.发明申请
公开(公告)号：WO2014093533A3
公开(公告)日：2014-09-12
申请号：PCT/US2013074469
申请日：2013-12-11
Applicant: QUALCOMM INC
Inventor： GUPTA RAJARSHI , DAS SAUMITRA MOHAN , ROWITCH DOUGLAS NEAL , SRIDHARA VINAY
CPC classification number: H04W76/007 , G01S5/02 , H04W4/023 , H04W4/04 , H04W4/22 , H04W64/003 , H04W84/005 , H04W84/045
Abstract: Described are methods and apparatuses for locating a portable services access transceiver (PSAT) for use in aiding emergency "911" services. In one implementation, detecting one or more conditions indicative of movement of a PSAT initiates transmission of one or more messages to a server indicating a reliability of or uncertainty in the estimated location of the PSAT. In another implementation, a location of a PSAT may be determined or updated using indoor navigation techniques.
Abstract translation: 描述用于定位用于辅助紧急“911”服务的便携式服务接入收发器（PSAT）的方法和设备。 在一个实现中，检测指示PSAT的移动的一个或多个条件启动向服务器发送一个或多个消息以指示PSAT的估计位置的可靠性或不确定性。 在另一实现中，可以使用室内导航技术来确定或更新PSAT的位置。
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