A New Method of Extracting Doppler Information in Non-cooperative Source Location
Wenbai Li · Journal of Xi'an Technological University · 2010
In order to address conventional Doppler information extraction method which has large amount of calculation and low precision of the shortcomings,the authors have a deep research in getting doppler information based on the passive location technology of noncooperated source,and also put forward an effective method to solve this problem.Application of this method to extract Doppler information has the advantages of higher precision and lower computational amount,and in the carrier wave extraction process.Discarding the previous searching algorithm,and the method of designing PLL is used to extract pure carrier wave,so that the method has the good real-time property.Simulation experiments show that using this method to measure the Doppler frequency change rate,a maximum of variation of that in 1 second is 0.52%,and also in 6 seconds is 1.6%.This performance could meet the project's requirements.