发明名称 |
FAST FOURIER TRANSFORM WITH DOWN SAMPLING BASED NAVIGATIONAL SATELLITE SIGNAL TRACKING |
摘要 |
A method and device to track navigational satellite signals, are claimed. In this invention, a combination of down-sampling and frequency domain transformation are used to track the navigational satellite signals under dynamic environment. A Fast Fourier Transform (FFT) with long coherent integration has been employed to determine the varying frequency components with high resolution. By representing a number of correlation values with their average value, it is possible to represent a long sequence of input values by a smaller number of values and a relatively short length FFT can reveal the low frequency components that are present in the signal during tracking operation. A large reduction in the computational load may be achieved using this down-sampling method without compromising on the frequency resolution. |
申请公布号 |
WO2007027933(A2) |
申请公布日期 |
2007.03.08 |
申请号 |
WO2006US34094 |
申请日期 |
2006.08.30 |
申请人 |
CENTRALITY COMMUNICATIONS, INC.;JIA, ZHIKE;WANG, CHI-SHIN |
发明人 |
JIA, ZHIKE;WANG, CHI-SHIN |
分类号 |
G01S19/23;G01S19/24;G01S19/29;H04B1/707 |
主分类号 |
G01S19/23 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|