A Fast-Direct Acquisition Scheme for Long Codes

While the conventional PMF-FFT scheme used for direct long codes acquisition is used,only one chip can be searched each time,resulting in lots of FFT operations and a long acquisition time.A novel large step PMF-FFT scheme with multi-chip search,which can reduce the complexity of FFT operations and accelerate the acquisition,is proposed.Experiment results show this new scheme can achieve favorable acquisition capability for long codes acquisition and has an extensive application foreground.