Research of Rapid Code Acquisition Method Based on Folded-structure Matched Filter and FFT
Hong‐Ying Chen · 2010
The Doppler frequency can get more than hundreds kHz in the spread spectrum TTC,but the acquisition time is limited in seconds level.Such rigorous required equipments had better to use parallel acquisition method both carrier wave and code,which is realized by matching filter nowadays.Aimed at that the code used by spectrum TTC is too long,which causes the matching filter consumes too many resources,to favorably apply in practical.The paper brings forward a acquisition method that uses the folded-structure matched filter and FFT frequency modulation.The method which utilizes the less resources advantage of the folded-structure matched filter,conquers the conflict between acquisition speed and resources consumption.The method reaches the aim that reduces the resources used but not change the acquisition speed in the same time.