FFT Splitting for Improved FPGA-Based Acquisition of GNSS Signals

Table 1

Range of applicability of the different solutions.

Solution	FFT length	Sampling frequency range	Sampling frequency range
		for L5, E5a, and E5b signals	for the E1 signal
3-FFT solution	65 536	20.46 MHz–32.768 MHz	6.138 MHz–8.192 MHz
5-FFT solution	32 768	20.46 MHz–21.846 MHz	5.4615 MHz
9-FFT solution	16 384	20.46 MHz–24.576 MHz	6.138 MHz–6.144 MHz
15-FFT solution	8192	20.46 MHz–20.480 MHz	5.120 MHz

A indicates that there is a loss due to a higher code step during the acquisition.