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公开(公告)号：HK1066864A1
公开(公告)日：2005-04-01
申请号：HK04109624
申请日：2004-12-06
Applicant: QUALCOMM INC
Inventor： WILBORN THOMAS BRIAN , PATEL SHIMMAN , SIH GILBERT C , ABRISHAMKAR FARROKH
Abstract: A velocity estimate is determined from a received signal by counting the number of times a signal in one multipath crosses a predetermined threshold in a given amount of time. A signal is received and a single multipath is extracted from the received signal. Instantaneous envelope values of the extracted multipath are calculated. A plurality of the instantaneous envelope values are used to calculate a running RMS value. A level crossing threshold is determined using the running RMS value. The number of times the instantaneous envelope value crosses the level crossing threshold is counted. The number of level crossings is mapped to a velocity estimate.
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公开(公告)号：CA2437399A1
公开(公告)日：2002-08-08
申请号：CA2437399
申请日：2002-01-31
Applicant: QUALCOMM INC
Inventor： WILBORN THOMAS BRIAN , SIH GILBERT C , PATEL SHIMMAN , ABRISHAMKAR FARROKH
Abstract: A velocityx estimate is determined from a recevied signal by counting the number of times a signal in one multipath crosses a predetermined threshold in a given amount of time. A signal is received and a single multipath is extracted from the received signal. Instantaneous envelope values of the extracted multipath are calculated. A plurality of the instantaneous envelop e valures are used to calculate a running RMS value. A level crossing threshol d is determined using the running RMS value. The number of times the instantaneous envelope value crosses the level crossing threshold is counted . The number of level crossings is mapped to a velocity estimate.
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公开(公告)号：BR0206878A
公开(公告)日：2005-01-18
申请号：BR0206878
申请日：2002-01-31
Applicant: QUALCOMM INC
Inventor： WILBORN THOMAS BRIAN , PATEL SHIMMAN , SIH GILBERT C , ABRISHAMKAR FARROKH
Abstract: A velocity estimate is determined from a received signal by counting the number of times a signal in one multipath crosses a predetermined threshold in a given amount of time. A signal is received and a single multipath is extracted from the received signal. Instantaneous envelope values of the extracted multipath are calculated. A plurality of the instantaneous envelope values are used to calculate a running RMS value. A level crossing threshold is determined using the running RMS value. The number of times the instantaneous envelope value crosses the level crossing threshold is counted. The number of level crossings is mapped to a velocity estimate.
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公开(公告)号：WO02061453A3
公开(公告)日：2003-02-13
申请号：PCT/US0204991
申请日：2002-01-31
Applicant: QUALCOMM INC
Inventor： WILBORN THOMAS BRIAN , PATEL SHIMMAN , SIH GILBERT C , ABRISHAMKAR FARROKH
CPC classification number: G01S11/02
Abstract: A velocityx estimate is determined from a recevied signal by counting the number of times a signal in one multipath crosses a predetermined threshold in a given amount of time. A signal is received and a single multipath is extracted from the received signal. Instantaneous envelope values of the extracted multipath are calculated. A plurality of the instantaneous envelope valures are used to calculate a running RMS value. A level crossing threshold is determined using the running RMS value. The number of times the instantaneous envelope value crosses the level crossing threshold is counted. The number of level crossings is mapped to a velocity estimate.
Abstract translation: 通过计算一个多径中的信号在给定的时间量内跨越预定阈值的次数，从接收信号确定速度估计。 接收信号并从接收信号中提取单个多路径。 计算提取的多路径的瞬时包络值。 多个瞬时包络线被用于计算正在运行的RMS值。 使用正在运行的RMS值来确定级别交叉阈值。 计算瞬时包络值跨越等级交叉阈值的次数。 级别交叉点的数量映射到速度估计。
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