专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2004005954A2 CROSS-CORRELATION MITIGATION METHOD AND APPARATUS FOR USE IN A GLOBAL POSITIONING SYSTEM RECEIVER 审中-公开
标题翻译：用于全球定位系统接收机的互相关减轻方法和装置
公开(公告)号：WO2004005954A2
公开(公告)日：2004-01-15
申请号：PCT/US2003/021793
申请日：2003-07-10
申请人： QUALCOMM, INCORPORATED
发明人： ROH, Mark Charles
IPC分类号： G01S1/00
CPC分类号： G01S19/21 , G01S19/246 , G01S19/25
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. 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. A "variable C/No" cross-correlation test is described that accounts for the effects on cross-correlations when the Doppler difference between an interfering SV and a target SV is high. A "strong" cross-correlation test is used to detect combined cross-correlations generated when two or more signals fall very close to each other in both code phase and Doppler frequency. A "wide Doppler" test is used when multiple SVs concurrently transmit signals that are relatively close in Doppler frequency, but not sufficiently close as to produce a cross-correlation peak of very strong energy. A pre-emptive cross-correlation test is described that performs cross-correlation testing early in the SV signal search process.
摘要翻译：描述了在全球定位系统（GPS）接收器中减轻互相关信号对接收的卫星信号的影响的方法和设备。 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的灵敏度。在检测之后，测量值被记录到数据库中以供进一步处理。描述了几个互相关测试。例如，“Mainlobe” 描述了互相关测试，其识别当干扰SV信号和目标SV信号之间的多普勒差异为非零和1kHz的倍数时发生的最显着的互相关。选择合适的C / No和多普勒阈值或掩模并用于识别主瓣交叉相关。宽多普勒掩模用于说明由BPSK数据位调制引起的互相关效应。 “变量C /否” 描述了当干扰SV与目标SV之间的多普勒差异高时对互相关的影响进行考虑的互相关测试。 “强” 互相关测试用于检测当两个或更多个信号在码相位和多普勒频率中彼此非常接近时产生的组合互相关。 “宽多普勒” 当多个SV同时发射多普勒频率相对接近但不足以产生非常强能量的互相关峰值的信号时，使用该测试。描述了在SV信号搜索过程中尽早执行互相关测试的先占互相关测试。

2. 发明申请

WO2006049963A2 CROSS-CORRELATION MITIGATION METHOD AND APPARATUS FOR USE IN A GLOBAL POSITIONING SYSTEM RECEIVER 审中-公开
标题翻译：用于全球定位系统接收器的交叉关联缓解方法和装置
公开(公告)号：WO2006049963A2
公开(公告)日：2006-05-11
申请号：PCT/US2005/038411
申请日：2005-10-24
申请人： QUALCOMM INCORPORATED , ROH, Mark Charles
发明人： ROH, Mark Charles
IPC分类号： G01S5/14 , G01S1/04
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。

3. 发明公开

EP1588185A1 METHOD AND APPARATUS FOR SCHEDULING SEARCH FOR AND ACQUISITION OF GLOBAL POSITIONING SATELLITES 审中-公开
标题翻译：方法和装置GPS卫星搜索和跟踪规划
公开(公告)号：EP1588185A1
公开(公告)日：2005-10-26
申请号：EP03790488.5
申请日：2003-12-11
申请人： Qualcomm, Incorporated
发明人： BHATIA, Ashok , JOSHI, Abhay, A. , NEUFELD, Arthur, J. , SALAMAN, Glenn , JOHNSON, Paul, K. , RAHMAT, Arie , RISTIC, Borislav , ROH, Mark Charles
IPC分类号： G01S5/14 , H04B1/38 , H04B7/26
CPC分类号： G01S19/235 , H04B7/2048
摘要： A wireless remote unit performs SPS acquisition interleaved with receiving paging information over a wireless slotted paging channel and receiving data packets over a wireless data communication system. The remote unit tunes to a pilot channel, synchronizes to an internal clock of the wireless remote unit with a pilot signal transmitted over the pilot channel; and starts a search for SPS satellites after completing synchronization with the internal clock.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式