发明申请
US20090207069A1 METHOD AND SYSTEM FOR DETERMINING VELOCITY BY USING VARIABLE OR DISTINCT SAMPLING RATES
有权
通过使用可变或不同的采样率来确定速度的方法和系统
- 专利标题: METHOD AND SYSTEM FOR DETERMINING VELOCITY BY USING VARIABLE OR DISTINCT SAMPLING RATES
- 专利标题(中): 通过使用可变或不同的采样率来确定速度的方法和系统
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申请号: US12165772申请日: 2008-07-01
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公开(公告)号: US20090207069A1公开(公告)日: 2009-08-20
- 发明人: John R. Kearney , Jason J. Wanner
- 申请人: John R. Kearney , Jason J. Wanner
- 主分类号: G01S13/58
- IPC分类号: G01S13/58
摘要:
A data processor applies transform processing to a first group of samples at a primary sampling rate, where the first group of samples is within a data window associated with at least one of the data blocks. A detector detects an estimated frequency shift between the transmitted signal and the reflected signal based on a primary peak frequency determined by the transform processing at the primary sampling rate. The data processor applies transform processing to a second group of samples at a secondary sampling rate, where the data window contains previously read samples and at least one new sample, if the estimated frequency shift falls within a target response frequency band. The detector detects an observed frequency shift between the transmitted signal and the reflected signal based on a secondary peak frequency determined by the transform processing at the secondary sampling rate. A velocity estimator for estimating a velocity of at least one of the object and the transmitter based on the estimated frequency shift, the observed frequency shift, or both.