FFT based Two Dimensional Compressed Correlator for Fast Acquisition in GNSS > International Conferences

FFT based Two Dimensional Compressed Correlator for Fast Acquisition in GNSS
Year	2013
Month
Journal	2013 / ION Pacific PNT
Author	Binhee Kim, Seung-Hyun Kong*
Acquisition of an incoming long pseudo-noise (PN) code signal requires a fast hypothesis testing function for a large number of code phase hypotheses. Since a receiver has limited hardware resources (in terms of number of correlators and computational capacity) in practice, fast PN code acquisition is not an easy goal to achieve. In this paper, we propose a FFT based two dimensional compressed correlator, where a 2D compressed correlator (TDCC) tests a number of coherently combined neighboring code phase hypotheses and Doppler frequency hypotheses using FFT. The proposed FFT based TDCC has much lower computation than the conventional FFT based technique.