Dual loop DSP-PLL with wide frequency acquisition range and fast frequency acquisition

in this paper, we propose a new dual loop digital signal processing type phase locked loop (Dual loop DSP-PLL) using digital signal processing type frequency locked loop (DSP-FLL) which we propose and the first order TAN type DSP-PLL (TAN-DSP-PLL). It is confirmed by the simulation results that dual loop DSP-PLL can pull in the frequency without cycle slip up to half of the sampling frequency. Moreover, the frequency acquisition time is faster and phase variance is smaller than those of the second order TAN-DSP-PLL. Therefore, the performance of the proposed dual loop DSP-PLL is superior to conventional DSP-PLLs.