Method for realizing signal acquisition on FPGA (Field Programmable Gate Array) based on PMF-FFT algorithm

• Main Authors: ZHAO LAIDING, LIAN JIAPENG, ZHANG GENGXIN
• Format: Patent
• Language: Chinese; English
• Published: 30.09.2022
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

The invention discloses a method for realizing signal acquisition on an FPGA based on a PMF-FFT algorithm, and the method comprises the steps: inputting a signal with frequency deviation and code element phase deviation into a partial matched filtering module, and obtaining a partial matched filtering correlation value; storing each partial matched filtering correlation value in a memory queue according to a specified sequence, and performing N-point zero padding operation; sequentially transmitting the zero-filled data of each memory to an FFTIP (Fast Fourier Transform Intellectual Property) core to carry out FFT (Fast Fourier Transform) operation, and outputting operation data; the square of the modulus of the operation data is obtained; performing maximum and minimum comparison on the value of the square of the modulus, and obtaining a maximum peak value and a coordinate K of the maximum peak value; and comparing the maximum peak value with a preset threshold value, and if the maximum peak value exceeds th