Pre- and post-correlation method for acquisition of new GNSS signals with secondary code

Correlation of GNSS signals that is implemented into a block processing by help of a FFT allows using and evolving of methods that has never been used before in a traditional continual processing. Our contribution focuses on utilization of a block pre-correlation processing for an acquisition of modern GNSS signals. This method combines the parallel in code search (PCS) algorithm with the Pre-Correlation Averaging (PCA) method for an acquisition of a secondary code of GNSS signals. The PCA method is working with samples of consecutives signal periods and averages them together period-by-period coherently to allow using a longer coherent time without additional costs in a correlation stage and without boost of the FFT unit size.