Independent sideband modulation signal demodulation method based on FPGA

• Main Authors: YUAN FUBIN, QIAN ZHEFENG
• Format: Patent
• Language: Chinese; English
• Published: 22.06.2018
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention discloses an independent sideband modulation signal demodulation method based on an FPGA, and the method comprises the steps: building a mathematical expression formula of an independentsideband modulation signal s(t); carrying out the Hilbert transformation of the signal s(t), and obtaining a signal s(t)<^>; inputting the signals s(t) and s(t)<^> into a first channel, and carryingout the down-conversion operation; enabling the signals to pass through a group of extraction filters, and obtaining a signal m1(t); inputting the signals s(t)<^> and s(t) into a second channel, carrying out the down-conversion calculation, enabling the signals to pass through a group of extraction filters, and obtaining a signal m2(t); carrying out the Hilbert transformation of the signal m2(t),and obtaining a signal m2(t)<^>; carrying out the Hilbert transformation of the signal m2(t)<^> again, and obtaining a signal -m2(t); carrying out the algorithm calculation of the obtained signals m1(t) and m2(t)<^>, and respec