Research on novel structure of GPS signal acquisition based on software receiver

To meet the requirement on GPS signal acquisition in degraded environment, data accumulation is effective in enhancing signal and noise ratio, which trades off huge computation burden, prolonged acquisition time and high cost of receiver. To improve performance in hardware design, Split-radix FFT and CORDIC technologies are brought into designing GPS signal acquisition block. In this paper, the principle of GPS signal acquisition method is introduced firstly. CORDIC technology is also used to speed up correlation computation when acquiring GPS signal. Furthermore, Split-radix FFT is employed to lower the cost of GPS receivers by reducing hardware resources (multipliers, adders, stores). Simulations are also performed to test the effectiveness of the novel structure proposed in this paper. The results demonstrate the novel structure possesses advantages in GPS signal acquisition, lowering acquisition time and reducing hardware expenditure.